Hioki MR8847A User manual

MEMORY HiCORDER MR8847A
For on-site work and R&D testing
Global Standard Recorder
All analog channels
Max. 32 ch
isolated
Logic channels
Max. 64 ch
16 channels standard
Max.
20 MS/s
high-speed sampling
Measuring multi-channel voltage and current simultaneously
Compatible with multi-channel input units (Ver. 2 .00 or later)
High-voltage 1000 V direct input measurement
Max. 1 MS/s high-speed sampling, 16-bit resolution measurement
Generate and record in a single unit
Reproduce and output problematic waveform measurements
No amp needed; max. 15 V output
ARBITRARY WAVEFORM GENERATOR UNIT
HIGH-VOLTAGE UNIT
4CH ANALOG UNIT 3CH CURRENT UNIT

2
Simply open the cover, insert the new paper, and then close the cover
Perform multi-channel, high-speed sampling at 20 M samples/sec
(time axis resolution: 50 nsec) for all channels at the same time.
Note: when U8975, U8977 or U8978 are installed, max. sampling speed is 10 MS/second
High-speed sampling allows you to measure the rising edge
of pulses and detect anomaly operations and instantaneous
waveforms that occur suddenly with high precision.
Input amp with built-in A/D converter
Connections between analog input
channels, and between the input
channel and the main unit, are
isolated by isolation elements.
So potential differences can be
measured without any concerns,
unlike with an oscilloscope.
Print large, high-denition hard copies for easy on-site checking.
Paper is easy to replace by inserting a new roll, rolling out the paper
slightly, and then closing the cover.
Isolation element
20 MS/sec sampling speed Isolated input for all channels
A4 size built-in printer
1 MS/s 20 MS/s
Observe the rising edge of pulses
A high-spec, high-quality
versatile measuring device
Vibration testing at the product development stage
Testing
Development

3
3
Hioki has developed an internal storage
FPGA for super-high-speed access. Used in
combination with large capacity high-speed
memory, this enables many hours of high-
speed sampling to be recorded.
The MR8847A is resistant to strong mechanical
shock and vibration, such as short drops.
The durable design has been tested to withstand
vertical drops of up to 50 cm (19.69 in.).
* Tested based on in-house conditions. A dropped unit is not guaranteed to be
free of damage or trouble.
Input
Input
A/D
conversion
A/D
conversion
Isolated
Isolated
MemoryMemory
writewrite
Screen display
Print output
The new internal SSD unit (available as an
additional option) has 128 GB of capacity,
allowing large amounts of data to be stored.
The MR8847A has 16 built-in logic input channels. Add 3
logic input units to record a total of 64 channels at once.
The waveforms of all channels can be displayed on a
single screen, making it ideal for timing measurements.
SSD 128 GB storage media
64 logic input channels
Abundant modules
Large 512 MW capacity (MR8847-53 only)
Durable design, with resistance to
dropping up to 50 cm (19.69 in.)
Measure and display multiple relays at the same time
NEW
Hioki has added new high-performance modules in
response to overwhelming demand.
The Memory HiCorder now supports a wide variety of
measurements.
Generating + monitoring
Power supply surveys for power equipment
Surveys
Development
4ch ANALOG UNIT U8975
4CH ANALOG UNIT U8978
3CH CURRENT UNIT U8977
NEW
NEW
NEW
Add eight 4CH Analog Input Units to record a total
of 32 channels at once. 100 V AC, up to 200 V DC,
and outputs from various sensors can be recorded
simultaneously for efficient measurement.
Up to 32 channels of
analog waveforms

4
An Extensive Line of Units
for Detecting a Wide Range
of Phenomena
Combine multiple units to record a range of phenomena
simultaneously. For example, use ve 4CH Analog Units to
measure 20 analog channels and three Logic Units to measure
up to 64 channels relay on/o signals or PLC (programmable
logic controller) signals. That’s simultaneous measurement of
84 channels!
Simultaneous measurement of multiple
locations across 32 channels at 5 MS/s
Simultaneously measure up to 32 channels
The U8975 accepts direct input of up to 200 V DC across 4 channels.
With a sampling rate of 5 MHz (across a frequency band of 2 MHz),
high speed, and 16-bit resolution, it can perform multi-channel,
high-speed, and high-resolution measurement.
4CH Analog Unit U8975
NEW
700 V AC
1000 V DC
4 ch
200 V DC
4 ch
100 mV f.s.
3275
(0.01 V/A) (10 V/A, 1 V/A, 0.1 V/A)
CT6711
3 mV
4 mV
2 mV
1 mV
400 80 120 160
Elapsed time [ms]
During measurement with the CT6711 (10 V/A range)
Maximum
resolution
0.1 μV
Battery Battery package
Direct, high-voltage input without dierential probes
The U8974 is ideal for measuring the primary and secondary sides of UPS
power supplies and commercial power supply transformers. It can measure
high-voltage power lines, including 380 V and 480 V circuits found in many
countries. With high-speed sampling at up to 1 MS/s and 16-bit resolution, it
can also be used in load rejection testing and switch testing.
High Voltage Unit U8974
Analyze correlations between phenomena, including voltage levels before
and after generator disconnection, RPM uctuation rates, governor servo
operating status, and voltage governor switching timing.
Simultaneously measure up to 32 channels
at high resolution
Thanks to four input channels and a high-sensitivity 100 mV f.s. range, the
U8978 can measure multiple channels of output from a variety of sensors. The
unit is ideal for use in measuring currents of various magnitudes in the
development of automobile accessory controls. Utilized in combination with the
multi-range Current Probe CT6711, it can measure currents from 1 mA to 50 A.
4CH Analog Unit U8978
NEW
Observe minuscule currents using high-sensitivity
wideband current probes
Current probe lineup
Analyze minuscule current waveforms
from low-power-consumption devices in
100 μA resolution. Record device current
consumption waveforms in high resolution
over extended periods of time.
Current consumption waveform for a temperature and humidity sensor
Specically designed for DC voltage measurement
with extremely high precision and resolution
The MR8990 can measure minuscule uctuations in sensor output of
automobiles and voltage uctuations in batteries, both at high precision
and resolution. It can accommodate maximum input of 500 V DC. The unit
is distinguished by its high input resistance. Additionally, the amount of
space taken up by instruments can be reduced by replacing a bench-style
DMM with the MR8847A. Systems can be simplied by eliminating the
need to control multiple instruments.
Digital Voltmeter Unit MR8990
Measurement range
Eective input
range
(Guaranteed
measurement
accuracy range)
Max.
resolution
Input
resistance
Measurement accuracy
NPLC:
less than 1
NPLC:
1 or more
5 mV/div (f.s. = 100 mV)
-120 mV to 120 mV
0.1 μV
100 MΩ
or more
± 0.01% rdg.
± 0.015% f.s.
± 0.01% rdg.
± 0.01% f.s.
50 mV/div (f.s. = 1000 mV)
-1200 mV to 1200 mV
1 μV
± 0.01% rdg.
± 0.0025% f.s.
500 mV/div (f.s. = 10 V) -12 V to 12 V 10 μV
5 V/div (f.s. = 100 V) -120 V to 120 V 100 μV 10 MΩ
± 5%
± 0.025% rdg.
± 0.0025% f.s.
50 V/div (f.s. = 1000 V) -500 V to 500 V 1 mV
● 6.5-digit display (resolution: 0.1 μV), 24-bit high resolution
For example, use ve 4CH Analog Units to measure 20 analog
channels and three Logic Units to measure up to 64 channels
relay on/off signals or PLC (programmable logic controller)
signals. That’s simultaneous measurement of 84 channels!

5
NEW
Hioki oers a wide range of current sensors to suit all
frequency band and rated current needs
3 ch
5 MS/s
Single solution for 3-phase current measurement
The U8977 delivers a sampling rate of 5 MS/s, frequency characteristics of 2
MHz, 16-bit A/D resolution, and DC accuracy of 0.3% f.s. to facilitate wideband,
high-precision current measurement using Hioki current sensors.
3CH Current Unit U8977
Power is supplied from the
current unit
Since current sensor power is
supplied directly from the current
unit, there’s no need to provide a
sensor power supply.
Power supply
Automatic conguration of
sensor scaling values
When you connect a current sensor,
the MR6000 will automatically detect
the model and set the appropriate
scaling value.
Zero-point stability
Wideband ux gate technology delivers high zero-point stability over
extended periods of time.
Long-term oset drift
Oset variability [% f.s.]
Elapsed time [h]
-0.015
-0.01
-0.005
0
0.015
0.005
0.01
7 865431 20
CT6841-05 (typical)
CT6843-05 (typical)
Sensitivity variations of high-accuracy clamp-type sensors caused by temperature
Ambient temperature [°C]
Change in sensitivity (typical) [% rdg.]
-1
-0.5
0
0.5
1
10080-20 0 20 40 60-40-60
CT6846-05 (1000 A), CT6845-05 (500 A)
CT6844-05 (500 A)
CT6843-05 (200 A)
CT6841-05 (20 A)
Previous models
9279 (500 A)
9278 (200 A)
9277 (20 A)
92799279
92779277
92789278
Compatible with high-precision sensors for
measuring large currents
Clamp-type high-accuracy
sensors deliver excellent
temperature characteristics,
allowing highly accurate
measurements to be made even
in the conned space of a
vehicle’s engine compartment.
Current sensor lineup
CT6843-05 CT6877
Output
waveform
example Sine wave Triangular wave Square wave Pulse wave
Ramp down wave Sweep output Program outputRamp up wave
Program and generate connected waveforms
2 ch
SMB terminals
Generate and record in a single unit
Just one MEMORY HiCORDER gives you a function generator mode,
arbitrary waveform generator mode, and waveform measurement mode.
This makes it easy to observe waveforms while varying test
conditions, such as changing the signal’s amplitude and frequency
and programming various waveforms to output in order.
Arbitrary Waveform Generator Unit U8793
Connect sensors directly
Output recorded waveforms without
modication
For example, you could output actual waveforms recorded from a car
without modication, and then use them for standalone testing. You
can also generate isolated output of up to 15 V without a generator or
amplier, which is traditionally necessary in order to generate output
while varying the signal's amplitude and frequency.
Process actual waveforms for
reproducibility testing
Process and calculate signals recorded with the MEMORY HiCORDER
and output the arbitrary waveforms that you create.
Waveform Maker Software included
After you install the included SF8000 Waveform Maker software on
your computer, you can create waveforms easily by either entering
them directly or by entering the functions behind them. You can also
quickly add noise and multiply waveforms.
Generate
Record Standalone testing
Max. 15 V output
Measurement
on actual car
Standalone
testing
2 channels, SMB terminals
2 types of output cables (sold separately) ►
Waveform Maker SF8000
for processing
as needed
Reproducibility testing

6
UPS Inverter
Inverter/UPS test
Perfect for inverter and UPS evaluation/start-up tests.
Record using both logic (control signals) and analog (primary/secondary voltage or current for a UPS or inverter).
The right unit for your
measurement needs
Power electronics
A dierential probe and a high-precision current sensor support broadband power electronics measurements.
Frequency analysis using FFT is also available.
Inverter Motor
Battery
Transformer dump tests
Interchannel isolation allows for safe circuit connections. Simultaneous high-speed sampling can record
waveforms before and after the dump. Input large numbers of control and circuit signals.
Maximum 1 MS/s high-speed sampling and 16-bit resolution in the high-voltage unit
allow the MR8847A to be used for interruption and switch testing
●Operation testing and evaluation during load fluctuation
●
Confirmation of UPS switching
●Transient response measurement of motors
●Long-term stability measurement by recorder function
4 ch
current
measurement
4 ch
voltage
measurement
2 ch
voltage
measurement
1 ch
current
measurement
5 ch
voltage
measurement
Device Model no. Units
MEMORY HiCORDER MR8847-51 1 unit
ANALOG UNIT 8966 1
CONNECTION CORD L9198 2
CURRENT UNIT 8971 1
CLAMP ON SENSOR 9272-05 1
CONVERSION CABLE CT9901 1
LOGIC PROBE 9327 1
Device Model no. Units
MEMORY HiCORDER MR8847-51 1 unit
4CH ANALOG UNIT U8978 1
DIFFERENTIAL PROBE 9322 4
AC ADAPTER 9418-15 4
3CH CURRENT UNIT U8977 2
AC/DC CURRENT SENSOR CT6875 4
Device Model no. Units
MEMORY HiCORDER MR8847-51 1 unit
HIGH-VOLTAGE UNIT U8 974 1
4CH ANALOG UNIT U8975 1
FREQ UNIT 8970 1
CONNECTION CORD L9197 5
CURRENT UNIT 8971 1
CLAMP ON SENSOR 9272-05 1
CONVERSION CABLE CT9901 1
LOGIC PROBE 9320-01 1
●The correlation between the voltage before and after the
interruption of a generator
●
RPM uctuation rate
●Governor servo motor operation conditions
●
Suppression machine switch timing

7
MEMORY HiCORDER MR8847 A
512 MW of high-capacity memory makes it easy to observe vibration waveforms for many hours while performing high-
speed sampling. This feature is perfect for detecting waveform peaks.
Observe minor vibrations
with high precision
Vibration testing equipment
Vibration/endurance tests
Save space by replacing multiple desktop DMM units with a single MEMORY HiCORDER.
This eliminates the need to control multiple units and simplies your system.
Replace multiple DMMs with a single Memory HiCorder
Install up to 8 DVM units to
expand up to 16 channels
Reproduce and output the observed anomalous waveforms without modication. When resolving problems observed
during research or development, you can reproduce such problems for eecient testing. You can also output waveforms
that you created yourself for testing and measure the results at the same time.
Record anomalous
waveforms
Reproduce and output
anomalous waveforms
Max. 15 V output
+
amplier
●Generate simulated output of each type of sensor signal
●
Fluctuating simulated output for 12 V CD car batteries
●
Analyze the relationship between engine control and
vibration
●
Confirm equipment durability
●
Minute uctuations in sensor output for automobiles
●
Voltage uctuations in batteries
2 ch
vibration
measurement
4 ch
strain
measurement
16 ch
voltage
measurement
Device Model no. Units
MEMORY HiCORDER MR8847-53 1 unit
4CG ANALOG UNIT U8978 1
STRAIN UNIT U8969 2
CHARGE UNIT U8979 1
Device Model no. Units
MEMORY HiCORDER MR8847-51 1 unit
4CH ANALOG UNIT U8978 1
ARBITRARY WAVEFORM
GENERATOR UNIT U8793 2
CONNECTION CORD L9198 4
Device Model no. Units
MEMORY HiCORDER MR8847-51 1 unit
DIGITAL VOLTAGE METER UNIT U8990 8
Anomaly simulation testing
4 ch
voltage
measurement
4 ch
waveform
output

8
Adjust levels while displaying waveforms
Detect instantaneous outages Setting screen for number of events
Set triggers while viewing
waveforms
Set input triggers while checking waveforms. You can
also display the settings screen separately as a floating
screen.
Trigger functions for monitoring all
measurement channels
- Level trigger for comparing a single voltage value
- Window trigger for comparing 2 voltage values
- Voltage drop trigger for detecting voltage drops in
commercial power lines
- Period trigger for monitoring periods
- Glitch trigger for detecting anomalies in pulses
- Pattern trigger for comparisons when the logic signal
is on/off
Acquiring data with triggers, and
post-acquisition searching
The MR8847A includes a search function for finding
abnormal waveforms within all of the acquired data.
You can use this function to search for anomalies after
data has been acquired, when it is too difficult to set
triggers because it is not possible to predict what types
of anomalies might be observed.
Set the number of events for each source
* Only for level and glitch triggers
Set trigger conditions in a variety of combinations.
Comment entry function
Set comments for each channel and display them on
the screen, even when observing multiple channels,
making identification easy.
Comments can be entered directly on the main unit.
And when printing, you can also print the channel
comments.
Full range of supporting functions
Help function
Understand operation methods without even reading
the instruction manual using the built-in help function.
Place the cursor on a field in the settings and press
the HELP button to view a detailed description of that
setting.
Press the “HELP” button A detailed description of the setting is displayed
On-site assistance
Label each channel
Master triggers

9
MEMORY HiCORDER MR8847 A
Zoom function
Display time axis reduced waveforms at the top of
the screen, and time axis enlarged waveforms at the
bottom of the screen. You can use the scroll function
to display the entire waveform while also observing
specific parts.
AB cursor function
Apply the Zoom function to set point A and point B for
the area you want to clip.
Connect to LAN for HTTP/FTP
server functions
Use the HTTP function to operate the MEMORY
HiCORDER with a browser on a PC connected via LAN.
You can also use the FTP function to acquire data from
the internal memory or from storage media inserted in
the MEMORY HiCORDER.
You can even acquire data from the internal memory
or from storage media connected to the MEMORY
HiCORDER via USB.
Check the entire waveform
Scan data at the cursor and the waveform's cross point
Enlarge/shrink along the time/vertical axes
Enlarge to observe waveform details
Conveniently manage scanned data on your computer
Specify the segment to save as binary or CSV data
Expand waveform
Extract
Collapse waveform
Scan
+
−
Acquire data Operate from computer
Hub
LAN connection
Enlarge waveforms
Scan and clip
PC operations

10
MR8847-51
(64 MW)
MR8847-52
(256 MW)
MR8847-53
(512 MW)
Maximum recording length
fluctuates depending on
number of channels used.
16 analog channels +
16 internal logic channels
16 analog channels +
16 internal logic channels
16 analog channels +
16 internal logic channels
Time axis
Sampling
period 40,000 divisions 160,000 divisions 320,000 divisions
5 μs/div 50 ns 0.2 s 0.8 s 1.6 s
10 μs/div 100 ns 0.4 s 1.6 s 3.2 s
100 μs/div 1 μs 4 s 16 s 32 s
1 ms/div 10 μs 40 s 2 min 40 s 5 min 20 s
100 ms/div 1 ms 1 h 06 min 40 s 4 h 26 min 40 s 8 h 53 min 20 s
1 s/div 10 ms 11 h 06 min 40 s 1 d 20 h 26 min 40 s 3 d 16 h 53 min 20 s
1 min/div 600 ms 27 d 18 h 40 min 00 s 111 d 02 h 40 min 00 s 222 d 05 h 20 min 00 s
5 min/div 3.0 s 138 d 21 h 20 min 00 s 555 d 13 h 20 min 00 s
1111 d 02 h 40 min 00 s
Maximum recording time to internal memory (excerpt)
- Caution: available recording duration is determined by internal RAM capacity, not
by external media
- Caution: for more reliable data protection, we recommend use of Hioki CF cards
or
USB DRIVE Z4006 , which are guaranteed to work with the instrument
- Note: table shows maximum values at arbitrary recording length settings
- When measuring at sampling speed of 100 msec/div (1 msec sampling) or
slower, data can be saved to media while measuring
Analysis software
Simultaneous recording on storage media
Sampling is done at the user-set period,
and all data is recorded
●Automatic data saving on SSD/CF card or USB memory stick
●During high-speed sampling, data is written to internal memory
first and later saved on other media
●
During low-speed sampling, data is written to internal memory
while also saved on other media
●Effective in reducing the dead time between measurements
A/D conversion Store on internal memory
Save on devices and media
CF card USB memory stick
Input
Record all
sampling data
Input
SSD
Sampling period
Recording
method
Record the data you need
■9335 brief specifications
Operating
environment
Windows 10/8/7 (32-/64-bit)
Functions
- Display functions: waveform display, X-Y display, cursor function, etc.
- File loading: readable data formats (.MEM, .REC, .RMS, .POW)/
maximum loadable file size: maximum file size that can be saved
by a given device (file size may be limited depending on the com-
puter configuration)
- Data conversion: conversion to CSV format, batch conversion of
multiple files, etc.
Printing
- Print function: printing image file output (expanded META type,
".EMF")
- Print formatting: not divided; divided by 2, 4, 8, or 16; 2, 4, 8 or
16 columns; X-Y1, X-Y2 or X-Y4 screen, preview, hard copy
WAVE PROCESSOR 9335
●Waveform display, calculations
●Print function
(software sold separately)
LAN COMMUNICATOR 9333
●Auto-save waveform data to PC
●
Remote control via LAN connection
●Save in CSV format and transfer
to spreadsheet programs
(software sold separately)
■9333 brief specifications
Operating
environment
Windows 10/8/7 (32 - /64-bit), Vista (32-bit), XP, (9333 ver.1.09 or later)
Functions
- Auto-saves waveform data to PC, remote control of Memory
HiCorder (by sending key codes and receiving images on screen),
print report, print images from the screen, receive waveform data
in the same format as waveform files from the Memory HiCorder
(binary only)
- Waveform data acquisition: accept auto-saves from the Memory
HiCorder, same format as auto-save files of the Memory HiCorder
(binary only), print automatically with a Memory HiCorder from a
PC. The Memory HiCorder’s print key launches printouts on the PC
- Waveform viewer: simple display of waveform files, conversion to
CSV format, etc.
Memory functions
*When sampling at low speed of 100 msec/div or less

11
MEMORY HiCORDER MR8847 A
REC time axis Sampling
period
To internal memory
20,000 divisions
Continuous
(approx. recording time with 30 m paper roll)
* Calculated as 30 m = 2970 divisions
* Changing paper enables semi-permanent
continuation of recording
100 ms/div
1 μs, 10 μs,
100 μs,
1 ms, 10 ms,
100 ms
* Limited by
combination of
selections under
1/100 on time
axis and time axis
setting for memory
recording
33 min 20 s Display only
200 ms/div 1 h 6 min 40 s Display only
500 ms/div 2 h 46 min 40 s 24 min 45 s
1 s/div 5 h 33 min 20 s 49 min 30 s
2 s/div 11 h 6 min 40 s 1 h 39 min 00 s
5 s/div 1 d 3 h 46 min 40 s 4 h 7 min 30 s
10 s/div 2 d 7 h 33 min 20 s 8 h 15 min 00 s
30 s/div 6 d 22 h 40 min 00 s 24 h 45 min 00 s
50 s/div 11 d 13 h 46 min 40 s 1 d 17 h 15 min 00 s
100 s/div 23 d 3 h 33 min 20 s 3 d 10 h 30 min 00 s
1 min/div 13 d 21 h 20 min 00 s 2 d 1 h 30 min 00 s
2 min/div 27 d 18 h 40 min 00 s 4 d 3 h 00 min 00 s
5 min/div 69 d 10 h 40 min 00 s 10 d 7 h 30 min 00 s
10 min/div 138 d 21 h 20 min 00 s 20 d 15 h 00 min 00 s
30 min/div 416 d 16 h 00 min 00 s 61 d 21 h 00 min 00 s
1 hr/div 833 d 8 h 00 min 00 s 123 d 18 h 00 min 00 s
Chart recording without missing transient events
Sampling is done at the user-set period,
and data other than the maximum and minimum values is thinned out for recording
●High-speed sampling ensures that transient events are captured even
with slow recording
●Data compression achieved by recording maximum/minimum value pairs
●Max. 833-day (1 hr/div) long-term recording even for 64 MW model
●Continuous recording until paper runs out for chart output
Maximum recording time with the recorder function
Notes
- When opening data created with the recorder function on a computer, the maximum
and minimum data pairs are lined up in a time series.
- Length of printer paper roll is 30 meters. Paper can be changed during operation
without stopping the recording process.
- With settings between 100 and 200 ms/div on the time axis, continuous recording is
not possible if the printer is on.
- The table shows values for the MR8847-51 (64 M-words memory capacity).
Model MR8847-52 (256 MW) can record four times and Model MR8847-53 (512 MW)
eight times as much. On the ''Continuous'' setting in recording length, total recording
time cannot be increased.
Screen
display
Sampling period
Maximum value
Minimum value
Reduced saving allows
long-term recording
even during high-speed
sampling
High-speed sampling
before data culling
A/D conversion
Chart recording
Store on internal memory
Input
Input
Recording
method
iPad App for Memory HiCorder HMR Terminal
● Freely control waveforms using iPad's gesture
controls
● Fingertip operation of max. 32 channels of
waveform data
● Operate the Memory HiCorder via network
You can change settings, and monitor
waveforms during measurement.
*New function on Ver. 2.0
Free app (exclusively for iPad) downloadable from the App Store
●
Check waveforms with
binary data on a PC
●
Save data in CSV
format and transfer to
spreadsheet programs
Wave Viewer Wv
(Bundled software)
■Wave Viewer (Wv) brief specifications
Operating
environment
Windows 10/8/7 (32-/64-bit)
Functions
- Simple display of waveform files
- Convert binary data files to text format, CSV, etc.
- Scroll function, enlarge/reduce display, jump to cursor/
trigger position, etc.
■ Data can be viewed by the iPad using Hioki’s dedicated apps available from the
App Store. Search for “HIOKI” and download the “HMR Terminal” app.
■HMR Terminal brief specifications (free software)
Operating
environment
iOS on the iPad (Apple Inc.)
Functions
- Data acquisition: send to iPad via FTP using a WiFi router, or load to
iPad via iTunes (PC app)
- Intuitively operate waveform level searches, maximum/minimum/aver-
age values, zero position adjustment, and more at your fingertips
- Waveform monitoring
- Meter setting
* Logic waveforms and computational waveforms are not supported
*iOS is a registered trademark of Cisco Technology, Inc. and/or its affiliates in the United States and certain other countries.
*iPhone, iPad, iPad mini, iPad Pro and iPod touch are trademarks of Apple Inc.
*Apple and the Apple logo are trademarks of Apple Inc. App Store is a service mark of Apple Inc.
*Microsoft, Windows, Windows Vista, and Excel are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.
Recorder functions

12
Denitive analysis of important data
The MR8847A can perform 24 calculations, including
RMS, peak value, and maximum value, from measured
waveforms. It can also perform time difference
measurements, phase difference measurements,
histogram measurements for high level and low level,
and statistical processing. Calculation results are
displayed together on the waveform observation
screen.
If you know the required formulas, you can also perform
complicated calculations. By entering formulas,
you can perform a variety of calculations even after
measurements are complete. For example, you can
make the settings shown on the right to find the RMS
value from a measured waveform.
The MR8847A can per form one-signal FFT for
analyzing frequency components, two-signal FFT for
analyzing transfer functions, and octave analysis for
acoustics.
FFT calculations from memory
waveforms
When performing FFT analysis of data measured with the
memory function, you can use the jog shuttle to specify
analysis points while also viewing the calculation results
at the same time. You can also display both the raw data
measured with the memory function and the calculation
results for storage waveforms at the same time, which
improves operability during analysis by displaying
spectrum waveforms while checking the results of
window functions.
Memory
waveform
Specify analysis
points
Display the calculation source (memory waveform) and FFT
calculation results at the same time
Results are the same for
both numerical calculations
and waveform processing
Enter formula
RMS = RMS value
n = data number
di = data for channel i
Scaling by "dB"
Change the number of calculation points after measurementRunning spectrum display
Display the spectrum as it changes over time in 3D
Before scaling
1,000 points
After scaling
Changed to 10,000 points
1
ndi
2
RMS=
n
i=1
Measured
waveform
Calculated
waveform
Calculate parameter values from measured waveforms
Process waveforms with formulas
FFT analysis function

13
MEMORY HiCORDER MR8847 A
Now even easier to use with independent pen up/down
control. Saving data in chronological order allows records
to be saved as digital data, rather than paper hardcopies
that need to be stored.
Pen up/down control
Pen up/down during X-Y recording is controlled
independently. Press the function button or use an
external control terminal (EXT. IN 1, 2, 3) for external
control.
Replaces mechanical pen recorders
Use pen up/down control to record only the required data.
This allows you to reduce the amount of unnecessary
data that is recorded, and lower the running cost for
paper.
Use the waveform judgment function, which monitors
whether a waveform extends beyond the given area, to
easily determine the quality of signal waveforms that are
normally difficult to judge.
For time axis ranges that are slower than 100 msec/
div, you can even make judgments while loading
waveforms. This allows you to take the appropriate
action the moment a poor waveform is detected on the
production line. You can stop the line as soon as an
abnormality is detected.
Judge FFT analysis waveforms
Judge FFT analysis waveforms in the same way.
Judge X-Y waveforms
In addition to time axis signals, the MR8847A also has a
waveform judgment function for X-Y waveforms built in.
Use this to detect:
- Displacement and pressure of presses
- Pressure and flow rate of pumps
The X-Y waveforms of the above and other data can be
tested automatically based on area judgment.
Pen up/down while recording X-Y waveforms
Control terminals
Judge waveform quality by area Judgment: poor
Judge FFT analysis waveforms and X-Y waveforms by area
X-Y RECORDER
Determine waveform quality
EXT. IN 1, EXT. IN 2, EXT. IN 3

14
Basic specications
Measurement
functions
MEMORY (high-speed recording), RECORDER (real-time recording)
X-Y RECORDER, FFT
Example channel
configurations/numbers
Eight analog input modules: 16 analog channels + 16 logic channels (built-in)
Eight 4ch analog input modules: 32 analog channels + 16 logic channels (built-in)
Five analog input modules + three logic input modules: 10 analog channels + 64
logic channels (16 built-in channels + 48 channels in logic input modules)
Five 4ch analog input modules + three logic input modules: 20 analog channels
+ 64 logic channels (16 built-in channels + 48 channels in logic input modules)
* For analog units, channels are isolated from each other and from frame GND. For
logic units and internal standard logic terminals, all channels have a common ground.
Number of modules
Up to 8 modules
Restrictions:
Up to 4 modules of Model 8971 Current Unit can be installed
Up to 3 modules of Model 8973 Logic Unit can be installed
Up to 3 modules of Model U8977 3CH Current Unit
Number of the
instrument logic
channels
16 channels (the input connectors of logic channels share the ground with
the instrument)
* Installing Model MR8990 Digital Voltmeter Unit in both slots for unit 1 and
unit 2 disables the instrument logic channels.
* Restrictions imposed when the logic instrument channels are used (when
the logic measurement is set to on)
- Measurement resolution of each measuring module decreases to 12-bit
when the module is installed in a slot for unit 1 or unit 2
- No frequency measuring modules are available when the module is
installed in the slots for unit 1 or unit 2
Max.
sampling speed
20 MS/second (50 ns period, all channels simultaneously)
Note: When U8975, U8977 or U8978 are installed, max. sampling speed is 10 MS/second
External sampling (10 MS/second, 100 ns period)
Memory capacity
MR8847-51: total 64 M-words (memory expansion: none)
32 MW/ch (using 2 analog channels), to 2 MW/ch (using 32 analog channels)
MR8847-52: total 256 M-words (memory expansion: none)
128 MW/ch (using 2 analog channels), to 8 MW/ch (using 32 analog channels)
MR8847-53: total 512 M-words (memory expansion: none)
256 MW/ch (using 2 analog channels), to 16 MW/ch (using 32 analog channels)
Removable storage
CF card slot (standard) × 1 (up to 2 GB, FAT, or FAT-32 format), SSD (128 GB,
optional), USB memory stick (USB 2.0)
Backup function
(At 25°C [77°F])
Clock and parameter setting backup: at least 10 years
Waveform backup function: none
Control terminals
External trigger input, trigger output, external sampling input, two external
outputs (GO, NG), three external inputs (START, STOP, PRINT)
External interface
LAN: 100BASE-TX (FTP server, HTTP server)
USB: USB 2.0 compliant, series A receptacle × 1, series B receptacle × 1, (file
transfer internal-drive/CF-card to PC, or remote control from PC)
Environmental
conditions
(no condensation)
Operation: -10°C to 40°C (14°F to 104°F), 20% to 80% RH
With printer and/or SSD in use: 0°C to 40°C (32°F to 104°F), 20% to 80% RH
Storage: -20°C to 50°C (-4°F to 122°F), 90% RH or less
Compliant standards
Safety: EN61010-1: 2010
EMC: EN61326-1:2003 Class A
Power supply
100 V AC to 240 V AC, 50/60 Hz
10 V DC to 28 V DC (using the DC POWER UNIT 9784: factory installation only)
Power consumption
130 VA max. (printer not used), 220 VA max. (printer used)
Dimensions and mass
Approx. 351 mm (13.82 in.) W × 261 mm (10.28 in.) H × 140 mm (5.51 in.) D,
7.6 kg (268.1 oz.) (main unit only)
Accessories
Instruction Manual × 1, Measurement Guide × 1, Application Disk
(Waveform Maker Software SF8000, Wave Viewer Wv, communication
commands table) × 1, power cord × 1, input cord label × 1, USB cable × 1,
printer paper × 1, roll paper attachment × 2, ferrite clamp × 1
Product warranty period
3 years (for SSD unit U8331 is 1 year)
Internal printer
Features
Printer paper one-touch loading, high-speed thermal printing
Recording Paper
216 mm (8.50 in.) × 30 m (98.43 ft.), thermal paper roll (use 9231 paper)
Waveform section recording width: 200 mm (7.87 in.) 20 division full scale,
1 div = 10 mm (0.39 in.) 80 dots
Recording speed
Max. 50 mm (1.97 in.)/sec
Paper feed density
10 dots/mm
MEMORY (High-speed recording)
Time axis
5 µs to 5 min/div (100 samples/div) 26 ranges, external sampling
(100 samples/div, or free setting), time axis zoom: x 2 to x 10 in
3 stages, compression: 1/2 to 1/200,000 in 16 stages
Sampling period
1/100 of time axis range (minimum 50 ns period)
Recording length
MR8847-51: 32 ch mode: 25 div to 20,000 div, 2 ch mode: 25 div to 200,000
div (built-in presets) or arbitrary setting in 1-div steps (max. 320,000 div*)
MR8847-52: 32 ch mode: 25 div to 50,000 div, 2 ch mode: 25 div to 1,000,000
div (built-in presets) or arbitrary setting in 1-div steps (max. 1,280,000 div*)
MR8847-53: 32 ch mode: 25 div to 100,000 div, 2 ch mode: 25 div to 2,000,000
div (built-in presets) or arbitrary setting in 1-div steps (max. 2,560,000 div*)
* Limited by the number of channels used
Note: When U8975, U8977 or U8978 is installed, the recording length is fixed to
32 ch mode. 2ch, 4ch, or 8ch mode can not selected.
Pre-trigger
Record data from before the trigger point at 0 to +100% or -95% of the
recording length in 15 stages, or in 1 div step settings
Numerical calculations
- Simultaneous calculation for up to 16 selected channels
Average value, effective (rms) value, peak to peak value, maximum value, time
to maximum value, minimum value, time to minimum value, period, frequency,
rise time, fall time, standard deviation, area value, X-Y area value, specified
level time, specified time level, pulse width, duty ratio, pulse count, arithmetic
operations, time difference, phase difference, high-level and low-level
- Calculation result evaluation output: GO/NG (with open-collector
5 V output)
- Automatic saving of calculation results
Waveform processing
- For up to 16 freely selectable channels, the following functions can be
performed (results are automatically stored):
automatic saving of arithmetic calculations, absolute value,
exponentiation, common logarithm, square root, moving average,
differentiation (primary, secondary), integration (primary, secondary),
parallel displacement along time axis, trigonometric functions, reverse
trigonometric functions, calculation results
Memory segmentation
- Max. 1,024 blocks, sequential storage, multi-block storage
Other
- No logging
- X-Y waveform synthesis (1-screen, 4-screens)
- Overlay (always overlay when started, overlay only required waveforms)
- Automatic/manual/A-B cursor range printing, report printing
RECORDER (real-time recording)
Time axis
10 ms/div to 1 hour/div, 19 ranges, time axis resolution 100 points/div
* Out of data acquired at selected sampling rate, only maximum and
minimum value data determined using 100 points/div units are stored.
Time axis compression selectable in 14 steps, from ×1/2 to ×1/50 000
Sampling period
1 μs, 10 μs, 100 μs, 1 ms, 10 ms, 100 ms (selectable from 1/100 or less of time
axis)
Real-time printing
Supported
* Real-time printing is possible at time axis settings slower than 500 ms/div
* Delayed print is performed when recording length is not set to
"Continuous" and time axis setting is 10 ms to 200 ms/div
* When recording length is set to "Continuous" and time axis setting is 10 ms
to 200 ms/div, manual printing can be performed after measurement stop
Recording length
MR8847-51: built-in presets of 25 to 20,000 div, or "Continuous" or arbitrary
setting in 1-div steps (max. 20,000 div)
MR8847-52: built-in presets of 25 to 50,000 div, or "Continuous" or arbitrary
setting in 1-div steps (max. 80,000 div)
MR8847-53: built-in presets of 25 to 100,000 div, or "Continuous" or
arbitrary setting in 1-div steps (max. 160,000 div)
* When using U8975, U8977 or U8978, the maximum recording length is half of the above
Additional recording
Supported (recording is resumed without overwriting previous data)
Waveform memory
MR8847-51: stores data for most recent 20,000 div in memory
MR8847-52: stores data for most recent 80,000 div in memory
MR8847-53: stores data for most recent 160,000 div in memory
* Backward scrolling and re-printing available
* When using U8978, U8977 or U8978, the length of the stored data is half of the above
Auto saving
Data are automatically saved on CF card, USB memory stick or internal
drive after measurement stops.
Other
- No logging
- Manual/A-B cursor range printing, report printing
X-Y RECORDER (X-Y real-time recording)
Sampling period
1 ms, 10 ms, 100 ms (dot), 10 ms, 100 ms (line)
Recording length
Continuous
Screen, printing
Split screen (1 or 4), manual printing only
Number of X-Y
1 to 8 phenomena
X-Y channel setting
Any 8 channels out of 16 can be selected for X axis and Y axis respectively
X-Y axis resolution
25 dots/div (screen), horizontal 80 dots/div × vertical 80 dots/div (printer)
Waveform memory
Sampling data for last the 4,000,000 points are stored in memory
* When using U8975, U8977, or U8978, the last 2,000,000 points are stored in memory
Pen up/down
Simultaneous for all phenomena
External pen control
Possible via external input connector (simultaneous up/down for all phenomena)
Display
Display section
10.4 inch SVGA-TFT color LCD (800 × 600 dots)
(time axis 25 div × voltage axis 20 div, X-Y waveform 20 div × 20 div)
Display languages
English, Japanese, Korean, Chinese
Waveform display
zoom/compression
Time axis: × 10 to × 2 (zoom on MEMORY function only), × 1, × 1/2 to ×
1/20,000
Voltage axis: × 100 to × 2, × 1, × 1/2 to × 1/10
Variable display
Upper/lower limit set, display/div set
Scaling
10:1 to 1000:1, automatic scaling for various probes
Manual scaling (conversion ratio setting, 2-point setting, unit setting)
Comment entry
Alphanumeric input (title, analog and logic channels), simple input, history
input, phrase input
Logic waveform
Display point move: 1% step, line width 3 types
Display partition
Max. 16 graphs
Monitor functions
- Level monitor
- Numerical value (sampling 10 kS/s fixed, refresh rate 0.5 s)
Other display
functions
- Waveform inversion (positive/negative)
- Measurement cursor (A, B, 2-cursor, for all channels)
- Vernier function (amplitude fine adjustment)
- Zoom function (horizontal screen division, zoomed waveform shown
in lower section)
- 16 selectable colors for waveform display
- Zero position shift in 1% steps for analog waveform
- One-step zero adjustment for all channels and all ranges
Product specifications
(Accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed
for 1 year)

15
MEMORY HiCORDER MR8847 A
Trigger functions
Trigger mode MEMORY (high-speed recording), FFT: single, repeat, auto
RECORDER (real-time recording): single, repeat
Trigger source
Ch 1 to ch 16 (analog), atandard logic 16 ch + logic unit (max. 3 units 48
channels), external (a rise of 2.5 V or terminal short circuit), timer, manual
(either on or off for each source), logic and/or of sources
Trigger types
- Level: triggering occurs when preset voltage level is crossed (upwards
or downwards)
- Voltage drop: triggering occurs when voltage drops below peak
voltage setting (for 50/60 Hz commercial power supply only)
- Window: triggering occurs when window defined by upper and lower
limit is entered or exited
- Period: rising edge or falling edge cycle of preset voltage value
is measured and triggering occurs when defined cycle range is
exceeded
- Glitch: triggering occurs when pulse width from rising or falling edge of
preset voltage value is under run
- Event setting: event count is performed for each source, and triggering
occurs when a preset count is exceeded
- Logic: 1, 0, or ×, pattern setting
Level setting resolution 0.1% of full scale (full scale = 20 divisions)
Trigger filter Selectable 0.1 div to 10.0 div, or off (high-speed recording)
On (10 ms fixed) or off (on RECORDER function)
Trigger output
Open collector (5 voltage output, active-low)
At level setting: pulse width (sampling period × data number after trigger)
At pulse setting: pulse width (2 ms)
Other functions
Trigger priority (off/on), pre-trigger function for capturing data from
before/after trigger event (on MEMORY function), level display during
trigger standby, start and stop trigger (at RECORDER function), trigger
search function
MR8847-51 (64 M-words) MR8847-52 (256 M-words) MR8847-53 (512 M-words)
Maximum recording length
increases depending on
number of channels used
Analog 32 ch
+ internal logic 16 ch
Analog 16 ch
+ internal logic 16 ch
Analog 2 ch
+ internal logic 16 ch
Analog 32 ch
+ internal logic 16 ch
Analog 16 ch
+ internal logic 16 ch
Analog 2 ch
+ internal logic 16 ch
Analog 32 ch
+ internal logic 16 ch
Analog 16 ch
+ internal logic 16 ch
Analog 2 ch
+ internal logic 16 ch
Time axis Sampling
period
20,000 div 40,000 div 320,000 div 80,000 div 160,000 div 1,280,000 div 160,000 div 320,000 div 2,560,000 div
5 μs/div 50 ns N/A 0.2 s 1.6 s N/A 0.8 s 6.4 s N/A 1.6 s 12.8 s
10 μs/div 100 ns
0.2 s 0.4 s 3.2 s 0.8 s 1.6 s 12.8 s 1.6 s 3.2 s 25.6 s
20 μs/div 200 ns
0.4 s 0.8 s 6.4 s 1.6 s 3.2 s 25.6 s 3.2 s 6.4 s 51.2 s
50 μs/div 500 ns
1 s 2 s 16 s 4 s 8 s 1 min 04 s 8 s 16 s 2 min 08 s
100 μs/div 1 μs
2 s 4 s 32 s 8 s 16 s 2 min 08 s 16 s 32 s 4 min 16 s
200 μs/div 2 μs
4 s 8 s 1 min 04 s 16 s 32 s 4 min 16 s 32 s 1 min 04 s 8 min 32 s
500 μs/div 5 μs
10 s 20 s 2 min 40 s 40 s 1 min 20 s 10 min 40 s 1 min 20 s 2 min 40 s 21 min 20 s
1 ms/div 10 μs
20 s 40 s 5 min 20 s 1 min 20 s 2 min 40 s 21 min 20 s 2 min 40 s 5 min 20 s 42 min 40 s
2 ms/div 20 μs
40 s 1 min 20 s 10 min 40 s 2 min 40 s 5 min 20 s 42 min 40 s 5 min 20 s 10 min 40 s 1 h 25 min 20 s
5 ms/div 50 μs
1 min 40 s
3 min 20 s 26 min 40 s
6 min 40 s
13 min 20 s 1 h 46 min 40 s
13 min 20 s
26 min 40 s 3 h 33 min 20 s
10 ms/div 100 μs
3 min 20 s
6 min 40 s 53 min 20 s
13 min 20 s
26 min 40 s 3 h 33 min 20 s
26 min 40 s
53 min 20 s 7 h 06 min 40 s
20 ms/div 200 μs
6 min 40 s
13 min 20 s 1 h 46 min 40 s
26 min 40 s
53 min 20 s 7 h 06 min 40 s
53 min 20 s
1 h 46 min 40 s 14 h 13 min 20 s
50 ms/div 500 μs
16 min 40 s
33 min 20 s 4 h 26 min 40 s
1 h 6 min 40 s
2 h 13 min 20 s 17 h 46 min 40 s
2 h 13 min 20 s
4 h 26 min 40 s 35 h 33 min 20 s
100 ms/div 1 ms
33 min 20 s
1 h 06 min 40 s 8 h 53 min 20 s
2 h 13 min 20 s
4 h 26 min 40 s 1 d 11 h 33 min 20 s
4 h 26 min 40 s
8 h 53 min 20 s 2 d 23 h 06 min 40 s
200 ms/div 2 ms
1 h 6 min 40 s
2 h 13 min 20 s 17 h 46 min 40 s
4 h 26 min 40 s
8 h 53 min 20 s 2 d 23 h 06 min 40 s
8 h 53 min 20 s
17 h 46 min 40 s 5 d 22 h 13 min 20 s
500 ms/div 5 ms
2 h 46 min 40 s
5 h 33 min 20 s 1 d 20 h 26 min 40 s
11 h 6 min 40 s
22 h 13 min 20 s 7 d 09 h 46 min 40 s
22 h 13 min 20 s
44 h 26 min 40 s 14 d 19 h 33 min 20 s
1 s/div 10 ms
5 h 33 min 20 s
11 h 06 min 40 s 3 d 16 h 53 min 20 s
22 h 13 min 20 s
1 d 20 h 26 min 40 s 14 d 19 h 33 min 20 s
1 d 20 h 26 min 40 s
3 d 16 h 53 min 20 s 29 d 15 h 06 min 40 s
2 s/div 20 ms
11 h 6 min 40 s
22 h 13 min 20 s 7 d 09 h 46 min 40 s
1 d 20 h 26 min 40 s
3 d 16 h 53 min 20 s 29 d 15 h 06 min 40 s
3 d 16 h 53 min 20 s
7 d 09 h 46 min 40 s 59 d 06 h 13 min 20 s
5 s/div 50 ms
1 d 3 h 46 min 40 s
2 d 07 h 33 min 20 s 18 d 12 h 26 min 40 s
4 d 15 h 6 min 40 s
9 d 06 h 13 min 20 s 74 d 01 h 46 min 40 s
9 d 6 h 13 min 20 s
18 d 12 h 26 min 40 s 148 d 03 h 33 min 20 s
10 s/div 100 ms
2 d 7 h 33 min 20 s
4 d 15 h 06 min 40 s 37 d 00 h 53 min 20 s
9 d 6 h 13 min 20 s
18 d 12 h 06 min 40 s 148 d 03 h 33 min 20 s
18 d 12 h 26 min 40 s
37 d 00 h 53 min 20 s 296 d 07 h 06 min 40 s
30 s/div 300 ms
6 d 22 h 40 min 0 s
13 d 21 h 20 min 00 s 111 d 02 h 40 min 00 s
27 d 18 h 40 min 0 s
55 d 13 h 20 min 00 s 444 d 10 h 40 min 00 s
55 d 13 h 20 min 0 s
111 d 02 h 40 min 00 s 888 d 21 h 20 min 00 s
50 s/div 500 ms
11 d 13 h 46 min 40 s
23 d 03 h 33 min 20 s 185 d 04 h 26 min 40 s
46 d 7 h 6 min 40 s
92 d 14 h 13 min 20 s 740 d 17 h 46 min 40 s
92 d 14 h 13 min 20 s
185 d 04 h 26 min 40 s Omitted*
1 min/div 600 ms
13 d 21 h 20 min 0 s
27 d 18 h 40 min 00 s 222 d 05 h 20 min 00 s
55 d 13 h 20 min 0 s
111 d 02 h 40 min 00 s 888 d 21 h 20 min 00 s
111 d 2 h 40 min 0 s
222 d 05 h 20 min 00 s Omitted*
100 s/div 1.0 s
23 d 3 h 33 min 20 s
46 d 07 h 06 min 40 s 370 d 08 h 53 min 20 s
92 d 14 h 13 min 20 s
185 d 04 h 26 min 40 s Omitted*
185 d 4 h 26 min 40 s
370 d 08 h 53 min 20 s Omitted*
2 min/div 1.2 s
27 d1 8 h 40 min 0 s
55 d 13 h 20 min 00 s 444 d 10 h 40 min 00 s
111 d 2 h 40 min 0 s
222 d 05 h 20 min 00 s Omitted*
222 d 5 h 20 min 0 s
444 d 10 h 40 min 00 s Omitted*
5 min/div 3.0 s
69 d 10 h 40 min 0 s
138 d 21 h 20 min 00 s Omitted*
277 d 18 h 40 min 0 s
555 d 13 h 20 min 00 s Omitted*
555 d 13 h 20 min 0 s
Omitted* Omitted*
- Maximum internal memory recording time (MEMORY function)
Other
Waveform judgment
function
(in MEMORY or FFT
function)
- Area comparison with reference waveform area for time domain
waveform, X-Y waveform, or FFT analysis waveform
- Parameter calculated value comparison with reference value
- Output: GO/NG decision, open-collector: 5 V
*100 msec/div (1 msec sampling) and thereafter allows for evaluation in
almost real-time.
Notes
- The above table shows maximum values at arbitrary recording length settings
- When measuring at sampling speed of 100 msec/div (1 msec sampling) or slower, data can be saved to media while measuring
- Operation cannot be guaranteed for extended recording periods of one year or longer. The above table represents theoretical values
* Time periods of 1000 or more days have been omitted due to print spacing and presumed usefulness to the reader.
FFT function
Analysis modes
Storage waveform, linear spectrum, RMS spectrum, power spectrum,
density of power spectrum, cross power spectrum, auto-correlation
function, histogram, transfer function, cross-correlation function,
impulse response, coherence function, 1/1 octave analysis, 1/3 octave
analysis, LPC analysis, phase spectrum
Analysis channels Selectable from all analog input channels
Frequency range
133 mHz to 8 MHz, external (resolution 1/400, 1/800, 1/2,000, 1/4,000)
Number of sampling
points 1,000, 2,000, 5,000, 10,000 points
Window functions Rectangular, hanning, hamming, blackman, blackman-harris, flat-top,
exponential
Display format Single, dual, nyquist, running spectrum
Averaging function Time/frequency axis simple averaging, exponential averaging, peak hold
(frequency axis), averaging times: 2 times to 10,000 times
Print functions Same as the MEMORY function (partial print not available)

16
ANALOG UNIT 8966
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for voltage measurement
Input terminals
Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF)
Max. rated voltage to ground: 300 V AC or DC (with input isolated from the
main unit, the maximum voltage that can be applied between input channel and
chassis, and between input channels without damage)
Measurement ranges (/div)
5 mV/div to 20 V/div, 12 ranges, full scale: 20 div
AC voltage for possible measurement/display using the memory function: 280 V rms
Low-pass filter: 5 Hz, 50 Hz, 500 Hz, 5 kHz, 50 kHz, 500 kHz
Measurement resolution
1/100 of range (using 12-bit A/D conversion)
Maximum sampling rate
20 MS/s (simultaneous sampling in 2 channels)
Measurement accuracy
±0.5% of full scale (with filter 5 Hz, zero position accuracy included)
Frequency characteristics
DC to 5 MHz, -3 dB (with AC coupling: 7 Hz to 5 MHz, -3 dB)
Input coupling
AC/DC/GND
Maximum input voltage
400 V DC (maximum voltage that can be applied between input connectors
without damage)
Dimensions and weight: approx. 106 mm (4.17 in.) W ×
19.8 mm (0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
TEMP UNIT 8967 (Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for temperature measurement with thermocouple
(voltage measurement not available)
Input terminals
Thermocouple input: plug-in connector, recommended wire diameter: single-wire,
0.14 mm
2
to 1.5 mm
2
, braided wire 0.14 mm
2
to 1.0 mm
2
(conductor wire diameter
min. 0.18 mm), AWG 26 to 16
Input impedance: min. 5 MΩ (with line fault detection on/off)
Max. rated voltage to ground: 300 V AC or DC (with input isolated from the
main unit, the maximum voltage that can be applied between input channel and
chassis, and between input channels without damage)
Temperature measurement
range
Note: Upper and lower limit values
depend on the thermocouple
10°C (50°F)/div (-100°C to 200°C [-148°F to 392°F ]), 50°C (122°F)/div (-200°C to
1,000°C [-328°F to 1,832°F]), 100°C (212°F)/div (-200°C to 2,000°C [-328°F to
3,632°F]), 3 ranges, full scale: 20 div,
Measurement resolution: 1/1,000 of measurement range (using 16-bit A/D conversion)
Thermocouple range
(JIS C 1602-1995)
(ASTM E-988-96)
K: -200°C to 1,350°C (-328°F to 2,462°F), J: -200°C to 1,100°C (-328°F to 2,012°F),
E: -200°C to 800°C (-328°F to 1,472°F), T: -200°C to 400°C (-328°F to 752°F), N:
-200°C to 1,300°C (-328°F to 2,372°F), R: 0°C to 1,700°C (32°F to 3,092°F), S: 0°C
to 1,700°C (32°F to 3,092°F), B: 400°C to 1,800°C (752°F to 3,272°F), W (WRe5-
26): 0°C to 2,000°C (32°F to 3,632°F),
Reference junction compensation: internal/external (switchable), line fault detection
on/off possible
Data refresh rate
3 methods, fast: 1.2 ms (digital filter off), normal: 100 ms (digital filter 50/60 Hz),
slow: 500 ms (digital filter 10 Hz)
Measurement accuracy
Thermocouple K, J, E, T, N: ±0.1% of full scale ±1°C (±1.8°F) (±0.1% of full scale
±2°C (±3.6°F) at -200°C to 0°C [-328°F to 32°F]),
Thermocouple R, S, B, W: ±0.1% of full scale ±3.5°C (±6.3°F) (at 0°C [32°F] to
less than 400°C [752°F]; however, no accuracy guarantee of less than 400°C
[752°F] for B), ±0.1% f.s. ±3°C (±5.4°F) (at 400°C [752°F] or more)
Reference junction compensation accuracy: ±1.5°C (±2.7°F) (added to
measurement accuracy with internal reference junction compensation)
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 204.5 mm (8.05 in.) D, approx. 240 g (8.5 oz.)
Accessories: ferrite clamp × 2
LOGIC UNIT 8973
Measurement functions
Number of channels: 16 channels (4 ch/probe connector, × 4 connectors)
Input terminals
Mini DIN connector (for Hioki logic probes only)
Compatible logic probes: 9320-01, 9327, MR9321-01
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 190 g (6.7 oz.)
Accessories: none
Optional specifications (sold separately)
4ch ANALOG UNIT U8975
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% RH after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 4, for voltage measurement
Input terminals
Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF)
Max. rated voltage to ground: 300 V AC, DC (with input isolated from the unit,
the maximum voltage that can be applied between input channel and chassis
and between input channels without damage)
Measurement range
4 V, 10 V, 20 V, 40 V, 100 V, 200 V f.s., 6 ranges
AC voltage for possible measurement/display: 140 V rms
Low-pass filter: 5 Hz, 500 Hz, 5 kHz, 200 kHz
Measurement resolution
1/32,000 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
5 MS/s (simultaneous sampling in 4 channels)
Measurement accuracy
±0 .1% f.s. (with filter 5 Hz, zero position accuracy included)
Frequency characteristics
DC to 2 MHz, -3 dB
Input coupling
DC/GND
Maximum input voltage
200 V DC (the maximum voltage that can be applied across input pins without
damage)
Dimensions and weight: approx. 106 mm (4.17 in.) W x 19.8
mm (0.78 in.) H x 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
NEW
NEW
4CH ANALOG UNIT U8978
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% RH after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 4, for voltage measurement
Input terminals
Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF)
Max. rated voltage to ground: 30 V AC or 60 V DC for direct input, 300 V AC,
DC (CAT II) when combined with the 9665 (between each input channel and
the main unit, and between the input channels)
Measurement range
100 mV, 200 mV, 400 mV, 1 V, 2 V, 4 V, 10 V, 20 V, 40 V f.s., 9 ranges
Low-pass filter: 5 Hz, 500 Hz, 5 kHz, 200 kHz
Measurement resolution
1/32,000 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
5 MS/s (simultaneous sampling in 4 channels)
Measurement accuracy
±0.3% f.s. (with filter 5 Hz, zero position accuracy included)
Frequency characteristics
DC to 2 MHz, -3 dB
Input coupling
DC/GND
Maximum input voltage
40 V DC (with direct input), 400 V DC (with 9665)
Dimensions and weight: approx. 106 mm (4.17 in.) W x 19.8
mm (0.78 in.) H x 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
CURRENT UNIT 8971
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for current measurement with optional current sensor
Input terminals
Sensor connector (input impedance 1 MΩ, exclusive connector for current sensor
via conversion cable the 9318, common GND with recorder)
Compatible current
sensors and measurement
range
(f.s. = 20 div)
Using 9272-05 (at 20 A range) or CT6841-05: 100 mA, 200 mA, 500 mA, 1 A, 2 A, 5 A
Using CT6862-05: 200 mA, 500 mA, 1 A, 2 A, 5 A, 10 A
Using 9272-05 (at 200 A range), CT6843-05 or CT6863-05: 1 A, 2 A, 5 A, 10 A, 20 A, 50 A
Using CT6844-05, CT6845-05, CT6846-05, CT6875, or CT6876: 2 A, 5 A, 10 A, 20 A,
50 A, 100 A
How to connect to 8971: use Conversion Cable 9318 + Conversion Cable CT9901
Measurement accuracy
(with 5 Hz filter on)
Note: add the accuracy and attri-
butes of the current sensor being
used
±0.65% f.s.
RMS amplitude accuracy: ±1% f.s. (DC, 30 Hz to 1 kHz), ±3% f.s. (1 kHz to 10 kHz)
RMS response time: 100 ms (rise time from 0% to 90% of full scale)
Crest factor: 2
Frequency characteristics: DC to 100 kHz, ±3 dB (with AC coupling: 7 Hz to 100 kHz)
Measurement resolution 1/100 of range (using 12-bit A/D conversion)
Maximum sampling rate 1 MS/s (simultaneous sampling in 2 channels)
Other functions
Input coupling: AC/DC/GND, low-pass filter: 5 Hz, 50 Hz, 500 Hz, 5 kHz, 50 kHz
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm (0.78 in.)
H × 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: CONVERSION CABLE 9318 × 2 (to connect the current sensors
to the 8971)
NEW
3CH CURRENT UNIT U8977
Measurement functions
No. of channels: 3, current measurement with optional current sensor
Input terminals
Dedicated connector terminal (ME15W) (input impedance 1 MΩ, common GND with
recorder)
Compatible current
sensors and
measurement range
- Directly connected current sensor: automatically identify rating of compatible
current sensors
Using 9272-05 (at 20 A range) or CT6841-05: 2 A, 4 A, 10 A, 20 A, 40 A, 100 A f.s.
Using CT6862-05: 4 A, 10 A, 20 A, 40 A, 100 A, 200 A f.s.
Using 9272-05 (at 200 A range), CT6843-05 or CT6863-05: 20 A, 40 A, 100 A,
200 A, 400 A, 1,000 A f.s.
Using CT6844-05, CT6845-05, CT6904, or CT6875: 40 A, 100 A, 200 A, 400 A,
1,000 A, 2,000 A f.s.
Using CT6846-05 or CT6876: 100 A, 200 A, 400 A, 1000 A, 2000 A, 4,000 A f.s.
Using CT6877: 200 A, 400 A, 1,000 A, 2,000 A, 4,000 A, 10,000 A f.s.
- Current sensors connected using CT9920: select conversion rate or model
Using CT7631 or CT7731: 200 A
Using CT7636 or CT7736: 200 A, 400 A, 1,000 A
Using CT7642 or CT7742: 2,000 A, 4,000 A
Using CT7044, CT7045 or CT7046: 2,000 A, 4,000 A, 10,000 A
Measurement accuracy
(with 5 Hz filter on)
Note: add the accuracy and attributes
of the current sensor being used.
±0.3% f.s.
Frequency characteristics: DC to 2 MHz, ±3 dB
Measurement resolution
1/32,000 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
5 MS/s (simultaneous sampling in 3 channels)
Other functions
Input coupling: DC/GND, low-pass filter: 5 Hz, 500 Hz, 5 kHz, 200 kHz
Dimensions and weight: approx. 106 mm (4.17 in.) W x 19.8 mm
(0.78 in.) H x 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% RH after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
FREQ UNIT 8970 (Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time;
accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for voltage input based frequency measurement,
rotation, power frequency, integration, pulse duty ratio, pulse width
Input terminals
Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF)
Max. rated voltage to ground: 300 V AC or DC (with input isolated from the
main unit, the maximum voltage that can be applied between input channel and
chassis, and between input channels without damage)
Frequency mode
Range: between DC to 100 kHz (minimum pulse width 2 μs), 1 Hz/div to 5 kHz/div
(full scale = 20 div), 8 settings
Accuracy: ±0.1% f.s. (exclude 5 kHz/div), ±0.7% f.s. (at 5 kHz/div)
Rotation mode
Range: between 0 to 2 million rotations/minute (minimum pulse width 2 μs),
100 (r/min)/div to 100 k(r/min)/div (full scale = 20 div), 7 settings
Accuracy: ±0.1% f.s. (excluding 100 k[r/min]/div), ±0.7% f.s. (at 100 k[r/min]/div)
Power frequency mode
Range: 50 Hz (40 Hz to 60 Hz), 60 Hz (50 Hz to 70 Hz), 400 Hz (390 Hz to 410 Hz)
(full scale = 20 div), 3 settings
Accuracy: ±0.03 Hz (50Hz, 60 Hz), ±0.1 Hz (400 Hz range)
Integration mode
Range: 2 k-counts/div to 1 M-counts/div, 6 settings
Accuracy: ±range/2,000
Duty ratio mode
Range: between 10 Hz to 100 kHz (min. pulse width 2 μs), 5%/div (full scale = 20 div)
Accuracy: ±1% (10 Hz to 10 kHz), ±4% (10 kHz to 100 kHz)
Pulse width mode
Range: between 2 μs to 2 sec, 500 μs/div to 100 ms/dv (full scale = 20 div)
Accuracy: ±0.1% f.s.
Measurement resolution
1/2,000 of range (integration mode), 1/500 of range (exclude integration, power
frequency mode), 1/100 of range (power frequency mode)
Input voltage range and
threshold level
±10 V to ±400 V, 6 settings, selectable threshold level at each range
Other functions
Slope, level, hold, smoothing, low-pass filter, switchable DC/AC input coupling,
frequency dividing, integration over-range keep/return
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none

17
MEMORY HiCORDER MR8847 A
HIGH RESOLUTION UNIT 8968
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions Number of channels: 2, for voltage measurement
Input terminals
Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF)
Max. rated voltage to ground: 300 V AC, DC (with input isolated from the unit,
the maximum voltage that can be applied between input channel and chassis
and between input channels without damage)
Measurement range
5 mV/div to 20 V/div, 12 ranges, full scale: 20 div
AC voltage for possible measurement/display using the memory function: 280 V rms
Low-pass filter: 5 Hz, 50 Hz, 500 Hz, 5 kHz, 50 kHz
Anti-aliasing filter
Integrated filter for suppressing aliasing distortion caused by FFT processing
(automatic cutoff frequency setting on/off)
Measurement resolution
1/1,600 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
1 MS/s (simultaneous sampling in 2 channels)
Measurement accuracy
±0.3% of full scale (with filter 5 Hz, zero position accuracy included)
Frequency characteristics
DC to 100 kHz, -3 dB (with AC coupling: 7 Hz to 100 kHz, -3 dB)
Input coupling
AC/DC/GND
Maximum input voltage
400 V DC (maximum voltage that can be applied between input connectors without damage)
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
DC/RMS UNIT 8972
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for voltage measurement, DC/RMS selectable
Input terminals
Isolated BNC connector (input impedance 1 MΩ, input capacitance 30 pF)
Max. rated voltage to ground: 300 V AC or DC (with input isolated from the
main unit, the maximum voltage that can be applied between input channel and
chassis, and between input channels without damage)
Measurement range
5 mV/div to 20 V/div, 12 ranges, full scale: 20 div
AC voltage for possible measurement/display using the memory function: 280 V rms
Low-pass filter: 5 Hz, 50 Hz, 500 Hz, 5 kHz, 100 kHz
Measurement resolution
1/100 of range (using 12-bit A/D conversion)
Maximum sampling rate 1 MS/s (simultaneous sampling in 2 channels)
Measurement accuracy
±0.5% of full scale (with filter 5 Hz, zero position accuracy included)
RMS measurement
RMS amplitude accuracy: ±1% f.s. (DC, 30 Hz to 1 kHz), ±3% of full scale (1 kHz to 100 kHz)
Response time: SLOW 5 s (rise time from 0% to 90% of full scale), MID 800 ms
(rise time from 0% to 90% of full scale), FAST 100 ms (rise time from 0% to 90% of
full scale), crest factor: 2
Frequency characteristics
DC to 400 kHz, -3 dB (with AC coupling: 7 Hz to 400 kHz, -3 dB)
Input coupling
AC/DC/GND
Maximum input voltage
400 V DC (maximum voltage that can be applied between input connectors without damage)
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
HIGH-VOLTAGE UNIT U8974
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and zero
adjustment; accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for voltage measurement, DC/RMS selectable
Maximum rated voltage to ground: 1,000 V AC or DC (CAT III), 600 V AC or DC (CAT IV)
Input terminals
Banana input terminal (input impedance: 4 MΩ, Input capacitance: 5 pF)
Measurement ranges(/div)
200 mV, 500 mV, 1 V, 2 V, 5 V, 10 V, 20 V, 50 V (DC mode)
500 mV, 1 V, 2 V, 5 V, 10 V, 20 V, 50 V (RMS mode)
Measurement resolution
1/1,600 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
1 MS/s
Measurement accuracy
±0.25% f.s. (with filter 5 Hz, zero position accuracy included)
RMS measurement
RMS accuracy: ±1.5% f.s. (DC, 30 Hz to 1 kHz), ±3% f.s. (1 kHz to 100 kHz)
Response time: high speed 150 ms, medium speed 500 ms, low speed 2.5 s
Frequency characteristics
DC to 100 kHz, -3 dB
Input coupling
DC/GND
Maximum input voltage
1,000 V DC, 700 V AC
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 230 g (8.1 oz.)
Accessories: none
DIGITAL VOLTMETER UNIT MR8990
(Accuracy at 23 ±5°C [73 ±9°F], 20% to 80% rh after 30 minutes of warm-up time and
calibration, accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for DC voltage measurement
Input terminals
Banana input connectors (input resistance: 100 MΩ or higher with 100 mV f.s. to 10
V f.s. range, otherwise 10 MΩ)
Max. rated voltage to ground: 300 V AC or DC (with input isolated from the main unit,
the maximum voltage that can be applied between input channel and chassis, and
between input channels without damage)
Measurement range
100 mV f.s. (5 mV/div) to 1,000 V f.s. (50 V/div), 5 ranges, full scale: 20 div
Measurement resolution 1/50,000 of measurement range (using 24 bit ΔΣ modulation A/D)
Integration time
20 ms × NPLC (during 50 Hz), 16.67 ms × NPLC (during 60 Hz)
Response time
2 ms + 2 × integration time or less (rise - f.s. →+ f.s., fall + f.s. →- f.s.)
Basic measurement
accuracy
±0.01% rdg. ±0.0025% f.s. (at range of 1,000 mV f.s.)
Maximum input voltage
500 V DC (maximum voltage that can be applied between input connectors without damage)
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 260 g (9.2 oz.)
Accessories: none
STRAIN UNIT U8969 (Accuracy at 23 ±5°C [73 ±9°F], 80% rh or less, after 30 minutes of warm-up time and auto-
balancing accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Measurement functions
Number of channels: 2, for distortion measurement (electronic auto-balancing,
balance adjustment range within ±10,000 µε or less)
Input terminals
NDIS connector EPRC07-R9FNDIS
(via Conversion Cable L9769 and NDIS connector PRC03-12A10-7M10.5)
Max. rated voltage to ground: 30 V rms or 60 V DC (with input isolated from the unit,
the maximum voltage that can be applied between input channel and chassis and
between input channels without damage)
Suitable transducer
Strain gauge converter, bridge impedance: 120 Ω to 1 kΩ, bridge voltage: 2 V ±0.05 V,
gauge rate: 2.0
Measurement range
20 to 1,000 µε/div, 6 ranges, full scale: 20 div, low-pass filter: 5 Hz, 10 Hz, 100 Hz, 1 kHz
Measurement resolution
1/1,250 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
200 kS/s (simultaneous sampling across 2 channels)
Measurement accuracy
After auto-balancing
±0.5% f.s. ±4 µε (5 Hz filter on)
Frequency characteristics
DC to 20 kHz, +1/-3 dB
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 245 g (8.6 oz.)
Accessories: conversion cable L9769 × 2 (cable length 60 cm [1.97 ft.])
PULSE GENERATOR UNIT MR8791
(Accuracy at 23 ±5°C [73 ±9°F], 80% rh or less with
no condensation; accuracy guaranteed for 1 year)
Output terminal
Number of channels: 8, Connector: D-sub, half-pitch, 50-pin
Max. rated voltage to ground: 30 V rms AC or 60 V DC (between unit and output channels)
Logic output, open collector output
Output mode 1
Pattern output: read frequency: 0 Hz to 120 kHz, 2,048 logic patterns
Pulse output: frequency 0 Hz to 20 kHz, duty 0.1% to 99.9%
Output mode 2
Logic output voltage level: 0 V to 5 V
(high level: 3.8 V or more, low level: 0.8 V or less)
Open collector output: 50 V absolute maximum rated voltage for collector/emitter
Overcurrent protection: 100 mA
Other
Self-test function
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 230 g (8.1 oz.)
Accessories: none
WAVEFORM GENERATOR UNIT MR8790
(Accuracy at 23 ±5°C [73 ±9°F], 80% rh after 30 minutes of warm-up time;
accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Output terminal
Number of channels: 4, SMB terminal (output impedance: 1 Ω or less)
Max. rated voltage to ground: 30 V rms AC or 60 V DC
Output voltage range
-10 V to 10 V (amplitude setting range: 0 V to 20 V p-p, setting resolution: 1 mV)
Max. output current
5 mA
Output function
DC, sine wave (output frequency range: 0 Hz to 20 kHz)
Accuracy
Amplitude accuracy: ±0.25% of setting ±2 mV p-p (1 Hz to 10 kHz)
Offset accuracy: ±3 mV
DC output accuracy: ±0.6 mV
Other
Self-test function (voltage, current)
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 230 g (8.1 oz.)
Accessories: none
ARBITRARY WAVEFORM GENERATOR UNIT U8793
(Accuracy at 23 ±5°C [73 ±9°F], 80% rh or less after 30 minutes or more of warm-up
time; power supply frequency range of installed MEMORY HiCORDER at 50/60 Hz ±2 Hz;
accuracy guaranteed for 1 year, post-adjustment accuracy guaranteed for 1 year)
Output terminal
Number of channels: 2, SMB terminal (output impedance: 1 Ω or less)
Max. rated voltage to ground: 30 V rms AC or 60 V DC
Output voltage range
-10 V to 15 V (amplitude setting range: 0 V to 20 V p-p, setting resolution: 1 mV)
Max. output current
10 mA (allowable load resistance: 1.5 kΩ or more)
FG function
DC, sine wave, square wave, pulse wave, triangular wave, ramp wave
Output frequency: 0 Hz to 100 kHz
Arbitrary waveform gen-
erator mode
Waveforms measured by MR8847A, etc., generated by Hioki model 7075 or SF8000, CSV waveforms
D/A refresh rate: 2 MHz (using 16-bit D/A)
Sweep function
Frequency, amplitude, offset, duty (pulse only)
Program function
Max. 128 steps (number of loops for each step, number of total loops)
Other
Self-test function (voltage), external input/output control
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 250 g (8.8 oz.)
Accessories: none
CHARGE UNIT U8979
(Accuracy at 23 ±5°C [73 ±9°F], 80% rh or less, after 30 minutes of warm-up time and zero
adjustment; Accuracy guaranteed for 1year, post-adjustment accuracy guaranteed for 1year)
Measurement functions
Number of channels: 2, for acceleration measurement
Input terminals
Voltage input, pre-amp embedded input: metal BNC connector (under voltage
input: input impedance 1 MΩ, input capacitance 200 pF or less)
Charge input: miniature connector (#10-32UNF)
Max. rated voltage to ground: 30 V AC or 60 V DC (with input isolated from the
main unit, the maximum voltage that can be applied between input channel and
chassis, and between input channels without damage)
*Voltage input terminal GND and charge input terminal GND for the same channel are shared
Suitable transducer
Charge output type acceleration detector
Pre-amp embedded acceleration detector (IEPE type)
Measurement range
Charge input
(miniature connector)
Pre-amp embedded input
(BNC connector)
1 (m/s
2
) to 200k (m/s
2
) f.s., 12 ranges × 6 types
Charge input sensitivity: 0.1 pC/(m/s
2
) to 10 pC/(m/s
2
)
Pre-amp embedded sensor input sensitivity: 0.1 mV/(m/s
2
) to 10 mV/(m/s
2
)
Amplitude accuracy: ±2% f.s., frequency characteristics: 1 (1.5) Hz to 50 kHz, -3 dB (charge
input)
Low-pass filter: 500 Hz, 5 kHz
Pre-amp supply power: 3.5 mA ±20%. 22 V ±5%
Maximum input charge: ±500 pC (6 ranges on high sensitivity side), 50,000 pC
(6 ranges on low sensitivity side)
Measurement range
Voltage input
(BNC connector)
10 mV to 40 V f.s., 12 ranges, DC amplitude accuracy: ±0.5% f.s.
Frequency characteristics: DC to 50 kHz, -3 dB (with DC coupling), 1 Hz to
50 kHz, -3 dB (with AC coupling)
Low-pass filter: 5 Hz, 500 Hz, 5 kHz, input coupling: AC/DC/GND
Maximum input voltage: 40 V DC
Measurement resolution
1/25,000 of measurement range (using 16-bit A/D conversion)
Maximum sampling rate
200 kS/s
Anti-aliasing filter
Integrated filter for suppressing aliasing distortion caused by FFT processing
(automatic cutoff frequency setting/off)
TEDS
IEEE 1451.4 class 1 support
(support for sensor information reading and automatic sensitivity setting)
Dimensions and weight: approx. 106 mm (4.17 in.) W × 19.8 mm
(0.78 in.) H × 196.5 mm (7.74 in.) D, approx. 230 g (8.1 oz.)
Accessories: none

18
Logic signal measurement
LOGIC PROBE 9327
LOGIC PROBE 9320-01
· 4-channel type, for voltage or contact signal on/o
detection
· Not isolated
· Response pulse width: 500 ns or more (9320-01),
100 ns or more (9327)
· Digital input threshold: 1.4 V, 2.5 V, 4.0 V
· Maximum input voltage: 0
V to +50 V DC
Logic Probe MR9321-01
· 4 channels, on/o detection of AC/DC voltage
· Isolated
· Response time:
rising edge 1 ms max., falling edge 3 ms max.
· Output (high) detection:
170 V to 250 V AC, ±(70 to 250) V DC (high range)
60 V to 150 V AC, ±(20 to 150) V DC (low range)
· Output (low) detection:
0 V to 30 V AC, ±(0 to 43) V DC (high range)
0 V to 10 V AC, ±(0 to 15) V DC (low range)
· Maximum input voltage:
250 V rms (high range), 150 V rms (low range)
External sampling measurement
CONNECTION CABLE L9795-01
SMB terminal to alligator clip, 1.5 m (4.92 ft.)
CONNECTION CABLE L9795-02
SMB terminal to BNC terminal, 1.5 m (4.92 ft.)
Storage media
Use only the CF Cards or USB drive sold by Hioki. Compatibility and performance are not guaran-
teed for CF cards or USB memory sticks made by other manufacturers. You may be unable to read
from or save data to such cards.
PC CARD 2G 9830
2 GB, PC card adapter included
PC CARD 1G 9729
1 GB, PC card adapter included
PC CARD 512M 9728
512 MB, PC card adapter included
USB DRIVE Z4006
16 GB, long-life, high-reliability SLC ash memory
System Chart of Options
Input modules
* Input cords not included. Please purchase them separately.
ANALOG UNIT 8966
2 ch, voltage input, 20 MS/s (DC to 5 MHz)
4CH ANALOG UNIT U8975
4 ch, voltage input, 5 MS/s (DC to 2 MHz),
input voltage limit: 200 V DC
4CH ANALOG UNIT U8978
4 ch, voltage input, 5 MS/s (DC to 2 MHz),
highest sensitivity range 100 mV f.s.
HIGH RESOLUTION UNIT 8968
2 ch, voltage input, 1 MS/s (DC to 100 kHz)
DC/RMS UNIT 8972
2 ch, voltage input, 1 MS/s (DC to 400 kHz)
RMS rectier (DC, 30 Hz to 100 kHz)
HIGH-VOLTAGE UNIT U8974
2 ch, voltage input, max. 1,000 V DC and 700 V AC
DIGITAL VOLTMETER UNIT MR8990
2 ch, high-precision DC voltage, 0.1 μV resolution,
maximum sampling rate 500 times/s
3CH CURRENT UNIT U8977
3 ch, for measuring current using dedicated current sensors, can
be directly connected to ME15W (12-pin) connector-type sensors,
for use with up to 3 units
CURRENT UNIT 8971
2 ch, for measuring current using dedicated current sensors,
2 CONVERSION CABLES 9318 included, for use with up to 4 units
TEMP UNIT 8967
2 ch, thermocouple temperature input
STRAIN UNIT U8969
2 ch, strain gauge type converter amp
CONVERSION CABLE L9769
(for STRAIN UNIT U8969 only, included)
FREQ UNIT 8970
2 ch, for measurement of frequency, RPM, pulse, etc.
CHARGE UNIT U8979
2 ch, for acceleration measurement, supports charge output,
pre-amp output (IEPE type), and voltage output
LOGIC UNIT 8973
4 terminals, 16 ch, for use with up to 3 units
Output modules
* Output cords not included. Please purchase them separately.
WAVEFORM GENERATOR UNIT MR8790
4 ch, ±10 V DC output, 1 Hz to 20 kHz sine waveform output
PULSE GENERATOR UNIT MR8791
8 ch, 0.1 Hz to 20 kHz pulse output, pattern output
ARBITRARY WAVEFORM GENERATOR UNIT U8793
2 ch, 10 mHz to 100kHz FG, -10 V to 15 V output,
D/A refresh rate (arbitrary waveform generator mode): 2 MHz
Factory-installed option
DC POWER UNIT 9784
Factory-installed option (not user installable), built
in on the bottom case. 10 V to 28 V DC drive.
SSD UNIT U8331
Specied upon order; built-in type, 128 GB
Printer options
RECORDING PAPER 9231
A4 width 216 mm (8.50 in.) × 30 m (98.43 ft.),
6 rolls/set
Note: main unit MR8847A cannot operate alone.
You must install one or more optional input modules in the unit.
Model : MEMORY HiCORDER MR8847A
Model No. (order code) (note)
MR8847- 51 (MR8847A, 64 M-word memory, main unit only)
MR8847- 52 (MR8847A, 256 M-word memory, main unit only)
MR8847-53 (MR8847A, 512 M-word memory, main unit only)
*Cannot operate alone, You must install other options
Case
CARRYING CASE 9783
Hard trunk type to protect unit during transport
PC Software
WAVE PROCESSOR 9335
Convert data, print and display waveforms
LAN COMMUNICATOR 9333
• Waveform data collect function
• Remote control with the PC
iPad App for MEMORY HiCORDER HMR Terminal
Download from the App Store (exclusively for Apple iPad)
Waveform Viewer Wv ( standard accessory )
Software for checking waveforms with binary data
on a PC, saving data in CSV format, and transferring
to spreadsheet programs
LAN CABLE 9642
Straight Ethernet cable, supplied with straight to
cross conversion cable, 5 m (16.41 ft.) length
For more information, please refer to the product information on the HIOKI website.
*Must specify when ordering

19
MEMORY HiCORDER MR8847 A
General-purpose current measurement * PL14 terminal type
AC/DC AUTO ZERO CURRENT SENSOR CT7731
DC, 1 Hz to 5 kHz, 100 A
AC/DC AUTO ZERO CURRENT SENSOR CT7736
DC, 1 Hz to 5 kHz, 600 A
AC/DC AUTO ZERO CURRENT SENSOR C T 774 2
DC, 1 Hz to 5 kHz, 2,000 A
AC/DC CURRENT SENSOR CT7631
DC, 1 Hz to 10 kHz, 100 A
AC/DC CURRENT SENSOR CT7636
DC, 1 Hz to 10 kHz, 600 A
AC/DC CURRENT SENSOR CT7642
DC, 1 Hz to 10 kHz, 2,000 A
AC FLEXIBLE CURRENT SENSOR CT7044
φ100 mm (3.94 in.), 6,000 A
AC FLEXIBLE CURRENT SENSOR CT7045
φ180 mm (7.09 in.), 6,000 A
AC FLEXIBLE CURRENT SENSOR CT7046
φ254 mm (10.00 in.), 6,000 A
INPUT CORD (B)
CONNECTION CORD L9198
φ 5.0 mm (0.20 in.) dia., cable allowing for
up to 300 V input, 1.7 m (5.58 ft.) length,
small alligator clip
CONNECTION CORD L9197
φ 5.0 mm (0.20 in.) dia., cable allowing for
up to 600 V input, 1.8 m (5.91 ft.) length,
detachable large alligator clips are bundled
GRABBER CLIP L9243
Attaches to the tip of the L9197, red/black
set, full length: 185 mm (7.28 in.)
INPUT CORD (C)
10:1 PROBE 9665
Max. rated voltage to ground is same as
for input module, 1.5 m (4.92 ft.) length
100:1 PROBE 9666
Max. rated voltage to ground is same as
for input module, 1.5 m (4.92 ft.) length
Custom cable * For P9000, inquire with your local Hioki distributor
(1) Bus powered USB cable
(2) USB(A)-Micro B cable
(3) 3-prong cable
INPUT CORD (A)
CONNECTION CORD L9790
Flexible φ 4.1 mm (0.16 in.) thin dia. cable allowing
for up to 600 V input, 1.8 m (5.91 ft.) length
* The end clip is sold separately
ALLIGATOR CLIP L9790-01
Red/black set attaches to the ends of the
cables L9790
GRABBER CLIP 9790-02
When this clip is attached to the end of the L9790,
input is limited to CAT II 300 V, red/black set
CONTACT PIN 9790-03
Red/black set attaches to the ends of the
cables L9790
INPUT CORD (F)
CONNECTION CABLE L4940
Banana plug, cord length: 1.5 m (4.92 ft.), red and black,
1 each
EXTENSION CABLE L4931
Extend the length of banana plug cables, cable length: 1.5
m (4.92 ft.)
ALLIGATOR CLIP L4935
Attaches to the tip of banana plug cables, CAT IV 600
V, CAT III 1,000 V
BUS BAR CLIP L4936
Attaches to the tip of banana plug cables, CAT III 600 V
MAGNETIC ADAPTER L4937
Attaches to the tip of banana plug cables, CAT III 1,000 V
GRABBER CLIP L9243
Attaches to the tip of banana plug cables, red/black
set, full length: 185 mm (7.28 in.), CAT II 1,000 V
INPUT CORD (D)
DIFFERENTIAL PROBE P9000-01
(Wave form only) for Memory HiCorder, 1 kV
AC, DC, frequency band: 100 kHz
DIFFERENTIAL PROBE P9000-02
(Switch between wave form/RMS) for Memory
HiCorder, 1 kV AC, DC, frequency band: 100 kHz
AC ADAPTER Z1008
100 V AC to 240 V AC
INPUT CORD (E)
DIFFERENTIAL PROBE 9322
1 kV AC, 2 kV DC, frequency band: 10 MHz
AC ADAPTER 9418-15
100 V AC to 240 V AC
INPUT CORD (G)
TEST LEAD L2200
Cable length: 70 cm (2.30 ft.), tips interchangeable
with a pin test lead or alligator clip, maximum input
voltage: CAT IV 600 V, CAT III 1,000 V
How to connect to units other than current units (8966, U8975, U8978, 8968, 8972)
High-precision current sensor (ME15W)
+
CT955x
+
L9217
→
Other unit
High-precision current sensor (PL23)
+
CT9900
+
CT955x
+
L9217
→
Other unit
Conversion cable
Power supply How to connect to 3CH Current Unit U8977
High-precision current sensor (ME15W)
→
3CH Current Unit U8977
High-precision current sensor (PL23) +CT9900 →
3CH Current Unit U8977
How to connect to 3CH Current Unit U8977
Current sensor (PL14)
+
CT9920
→
3CH Current Unit U8977
How to connect to Current Unit 8971
High-precision current sensor (ME15W)
+CT9901 +9318 →
Current Unit 8971
High-precision current sensor (PL23) +9318 →
Current Unit 8971
* 9318 is an accessory of current unit 8971
Other options for input
CONNECTION CORD L9217
Cord has insulated BNC connectors at both
ends, signal output use, 1.6 m (5.25 ft.) length
CONVERSION ADAPTER 9199
Receiving side banana terminal, output BNC
terminal
Non-contact voltage measuring
NON-CONTACT AC VOLTAGE PROBE SP3000-01
5 V rms rated, 10 Hz to 100 kHz band width
NON-CONTACT AC VOLTAGE PROBE SP3000
Sold individually
AC VOLTAGE PROBE SP9001
Sold individually
Temperature sensor
THERMOCOUPLE
*For reference only.
Please purchase locally.
INPUT CABLE (H)
CONNECTION CABLE 9166
BNC-clips, cable length: 1.5 m (4.92 ft.)
Leak Current * For commercial power lines, 50/60 Hz
AC LEAKAGE CLAMP METER CM4003
6 mA range (1 μA resolution) to 200 A range,
with WAVE/RMS output, CONNECTION CABLE
L9097 (output terminal: BNC, power terminal:
USB-C, 1.5 m (4.92 ft.) length) is included
AC ADAPTER Z1013
100 V to 240 V AC
CONVERSION CABLE CT9901
Convert ME15W (12-pin) terminal to PL23 (10-pin) terminal
SENSOR UNIT CT9555
1ch, with waveform output
SENSOR UNIT CT9556
1ch, with waveform and RMS
output
SENSOR UNIT CT9557
4ch, with waveform, total wave-
form, and total RMS output
CONNECTION CORD L9217
Cord has insulated BNC
connectors at both ends, 1.6 m
(5.25 ft.) length
CONVERSION CABLE CT9900
Convert PL23 (10-pin) terminal to ME15W (12-pin) terminal
CONVERSION CABLE CT9920
Convert PL14 terminal to ME15W (12-pin)
terminal
U8977 only
High-precision current
measurement
High-precision pull-through current sensors, observe waveforms
from DC to distorted AC
AC/DC CURRENT SENSOR CT6862-05, 1 MHz, 50 A
AC/DC CURRENT SENSOR CT6863-05, 500 kHz, 200 A
Observe waveforms from DC to distorted AC
AC/DC CURRENT PROBE CT6841-05, 1 MHz, 20 A
AC/DC CURRENT PROBE CT6843-05, 500 kHz, 200 A
Observe AC waveforms (cannot observe DC)
CLAMP ON SENSOR 9272-05, 100 kHz, 200 A
High-precision pull-through current sensors, observe waveforms
from DC to distorted AC
AC/DC CURRENT SENSOR CT6904, 4 MHz, 500 A
High-precision pull-through current sensors, observe waveforms
from DC to distorted AC
AC/DC CURRENT SENSOR CT6875, 2 MHz, 500 A
AC/DC CURRENT SENSOR CT6876, 1.5 MHz, 1,000 A
High-precision pull-through current sensors, observe waveforms
from DC to distorted AC
AC/DC CURRENT SENSOR CT6877, 1 MHz, 2,000 A
Observe waveforms from DC to distorted AC
AC/DC CURRENT PROBE CT6844-05, 200 kHz, 500 A
AC/DC CURRENT PROBE CT6845-05, 100 kHz, 500 A
AC/DC CURRENT PROBE CT6846-05, 20 kHz, 1,000 A
Precautions for connecting current sensors
and current probes
* The bandwidth of current sensors and current probes is limited
by the bandwidth of the current unit to be connected.
* Depending on the combination of current sensors and
current probes, physical and space limitations may prevent
simultaneous connection. Hioki can assist with special order
conversion cables. Please inquire with your local distributor.
* A total of 9 current sensors and current probes can be connected
simultaneously to the Memory HiCorder. However, it is limited
by the capacity of the current sensor to be connected.
* Three U8977 current units and four 8971 current units can be
simultaneously connected to the Memory HiCorder.
* If combining a current sensor or current probe with a sensor
power source and using the voltage input analog unit for current
measurement, there is no limitation on the number of connections.
* Only the U8977 can use the CT9920 to convert a PL14
connector sensor. The 8971 does not support this combination.
High sensitivity,
wideband current measurement
CURRENT PROBE CT6710
Frequency characteristics: DC to 50 MHz
wideband response, 0.5 A-class up to 30 A rms
CURRENT PROBE CT6711
Frequency characteristics: DC to 120 MHz
wideband response, 0.5 A-class up to 30 A rms
CURRENT PROBE CT6700
Frequency characteristics: DC to 50 MHz
wideband response, 1 mA-class up to 5 A rms
CURRENT PROBE CT6701
Frequency characteristics: DC to 120 MHz
wideband response, 1 mA-class up to 5 A rms
CLAMP ON PROBE 3273-50
Frequency characteristics: DC to 50 MHz
wideband response, 10 mA-class up to 30 A rms
CLAMP ON PROBE 3276
Frequency characteristics: DC to 100 MHz
wideband response, 10 mA-class up to 30 A rms
CLAMP ON PROBE 3274
Frequency characteristics: DC to 10 MHz
wideband response, up to 150 A rms
CLAMP ON PROBE 3275
Frequency characteristics: DC to 2 MHz
wideband response, up to 500 A rms
* Voltage is limited to the specications
of the input modules in use.
* Voltage is limited to the specications
of the input modules in use
* The maximum input voltage is derated a based on the input frequency.
Please refer to the instruction manual of each probe for details.
* Voltage to ground is within this product’s specications.
* Separate power source is also required.
* Voltage to ground is within this product’s specications.
* Separate power source is also required.
* For U8974
* For MR8990
* ME15W (12-pin) terminal type
* Directly connect to U8977
Power supply
POWER SUPPLY 3272
One sensor can be driven, two sensors can be driven
depending on conditions. (Not available for CT6710, CT6711)
POWER SUPPLY 3269
Up to four sensors can be driven. (CT6710 and CT6711
are limited to 2 sensors)
* Necessary for use the 3270 seies current probes

All information correct as of July 7, 2021. All specications are subject to change without notice. MR8847A_E10-17B Printed in Japan
DISTRIBUTED BY
Note: company names and product names appearing in this brochure are trademarks or registered trademarks of various companies.
HEADQUARTERS
81 Koizumi,
Ueda, Nagano 386-1192 Japan
https://www.hioki.com/
Unit selection guide (17 types)
(#1) Minimum resolution shows the highest sensitivity resolution. (#2) Minimum pulse width 2 μs
Unit
interchangeability
The following units are compatible with the MR8847A. Some units in the list are also compatible with the MEMORY HiCORDER MR6000,
MR8827, MR8740, MR8741, and MR8740-50. Please check the brochure of each product.
Description
model
Measured
signal
No. of
channels
Fastest
sampling
Bandwidth
A/D
resolution
DC
accuracy
Max. input
voltage
Sensitivity
(#1)
Max.
sensitivity
range
Isolation
Additional
information
Analog Unit
8966 Voltage 2 ch 20 MS/s DC to 5 MHz 12-bit ±0.5% f.s. 400 V DC 0.05 mV
100 mV f.s. Yes
n/a
4ch Analog Unit
U8975
Voltage
(4ch) 4 ch 5 MS/s DC to 2 MHz 16-bit ±0.1% f.s. 200 V DC 0 .125 mV 4 V f.s. Yes
n/a
4CH Analog Unit
U8978
Voltage
(4ch, high resolution)
4 ch 5 MS/s DC to 2 MHz 16-bit ±0.3% f.s. 40 V DC 3.125 uV 100 mV f.s. Yes n/a
High Resolution Unit
8968
Voltage
(high resolution)
2 ch 1 MS/s DC to 100 kHz 16-bit ±0.3% f.s. 400 V DC 3.125 uV 100 mV f.s. Yes with AAF
DC/RMS Unit
8972
Voltage
(DC, RMS) 2 ch 1 MS/s DC to 400 kHz 12-bit ±0.5% f.s. 400 V DC 0.05 mV
100 mV f.s. Yes with RMS
High Voltage Unit
U8974
Voltage
(high voltage) 2 ch 1 MS/s DC to 100 kHz 16-bit ±0.25% f.s. 1000 V DC
700 V AC 0.12 5 mV 4 V f.s. Yes n/a
Digital
Voltmeter Unit
MR8990
Voltage
(high resolution)
2 ch 2 ms n/a 24-bit ±0.01% rdg.
±0.0025% f.s. 500 V DC 0.1 uV
100 mV f.s. Yes n/a
3CH Current Unit
U8977 Current 3ch 5 MS/s DC to 2 MHz 16-bit ±0.3% f.s.
Current sensor
only
Depends on current
sensor n/a Max. 3 units
Current Unit
8971 Current 2 ch 1 MS/s DC to 100 kHz 12-bit ±0.65% f.s.
Current sensor
only
Depends on current
sensor n/a with RMS
Max. 4 units
Temperature Unit
8967 Temperature 2 ch 1.2 ms DC 16-bit
See option
specifications
Thermocouples
only
0.01℃
200°C
(392°F) f.s.
Yes n/a
Strain Unit
U8969 Strain 2 ch 200 kS/s DC to 20 kHz 16-bit ±0.5% f.s.
±4 µε
Strain
only 0.016
µε 400 µε f.s. Yes
n/a
Frequency Unit
8970 Frequency 2 ch 200 kS/s DC to 100 kHz
(#2) 16-bit
n/a 400 V DC 0.002 Hz
Depends
on mode
Yes n/a
Charge Unit
U8979 Acceleration 2 ch 200 kS/s
DC to 50 kHz (DC)
1 Hz to 50 kHz (AC)
16-bit
±0.5% f.s.
(voltage)
±2.0% f.s.
(acceleration)
40 V DC Depends on
acceleration sensor Yes Supports TEDS
Logic Unit
8973 Logic 4 probes
(16 ch)
n/a n/a n/a n/a n/a n/a n/a n/a
Requires 9320-01,
9327 or MR9321-01
Description
model
No. of
channels
Output function
Output voltage
range
Waveform Generator Unit
MR8790
4 ch
DC, Sine wave (output frequency range: 0 Hz to 20 kHz) -10 V to 10 V
Arbitrary Waveform
Generator Unit U8793
2 ch
FG function: sine wave, square wave, pulse wave, triangular wave, ramp wave, and DC
Arbitrary waveform generator mode: waveforms measured by MR8847A or generated by SF8000, or CSV waveforms
-10 V to 15 V
Description
Model
No. of
channels
Output function Output
terminal
Pulse Generator Unit
MR8791
8 ch
Pulse output: frequency is 0 Hz to 20 kHz
Logic output: output voltage level is 0 V to 5 V
Open collector output
Connector: D-sub,
half-pitch, 50-pin