Hioki MR8880-20 User manual

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Operating Keys and LED
START
Starts measurement. The LED at the right lights green while measuring.
STOP
Stops measurement.
SAVE
Press to save data manually.
SCROLL/CURSOR
Use the left and right keys to scroll through the waveform in either direction or
move the A/B cursors accordingly.
MONITOR
Displays the current input state as a waveform or numerical values. (The data
is not recorded in internal buffer memory.)
WAVE
Switches to the waveform screen display.
SET
Displays the Settings screens, and toggles among the screen tabs with each
press.
FILE
Displays file information.
POWER LED
Lights when the power is turned on.
CHARGE LED
Lights when the Z1000 Battery Pack is charging.
PRESETS
Allows you to set measurement conditions by follow-
ing the instructions on the screen.
Cursor Keys
Moves the position of the cursor (blinking selection)
on the screen.
ENTER
Accepts displayed settings.
KEY LOCK
To lock the keys, press and hold the left
and right cursor keys for three seconds.
Repeat to unlock.
ESC
Cancels changes to settings.
MR8880-20
MEMORY HiCORDER
Measurement Guide
June 2011 Edition 1 Printed in Japan
MR8880B981-00 11-06H
This measurement guide provides several measurement examples
available with Model MR8880-20 using the instrument’s “PRE-
SETS” feature. Because only the minimum instructions are avail-
able here, please study the detailed instruction manual carefully
before actually using the instrument.
Display the Measurement Guide Screen
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Apply
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1. Display the measurement guide screen.
(See page 1.)
2. Select “Measure Power Supply on INSTNT”.
3. Configure the settings as shown below.
4. Select “Start measurement”.
The start confirmation dialog will be displayed.
5. Press the START key to begin measuring.
The MR8880-20 will measure ONCE, and display a
waveform like that shown below.
Measuring a 100 V AC Waveform
How to measure 5 cycles of the waveform level (instanta-
neous value) of a 100 V AC/60 Hz voltage waveform once
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Select
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• When measuring quick-changing signals such as power wave-
forms or sudden transients, use the "Highspeed" function.
T
0.00 V
Trigger point
• For this example, a trigger has
been set to start measurement
when the signal reaches 0V. The
trigger point (measurement start
point) is shown on the right.
1. Display the measurement guide screen.
(See page 1.)
2. Select “Measure Power Supply on RMS”.
3. Configure the settings as shown below.
4. Select “Start measurement”.
The start confirmation dialog will be displayed.
5. Press the START key to begin measuring.
The MR8880-20 will measure for 1 minute, and then
display a waveform like that shown below.
Measuring 100 V AC RMS
How to measure the RMS level of the voltage fluctuation
of a 100 V AC/60 Hz commercial power supply for 1 min-
ute
Select
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4
Select
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• When measuring the RMS fluctuation of a power supply or cap-
turing the long-term changes of slow-moving phenomena, use the
"Realtime" function.
• To measure and save data to external media at the same time,
insert a CF Card or USB flash drive into the MR8880-20, and con-
figure the device according to Step 3 in "Save Measurement
Data". Please refer to the detailed instruction manual for further
information.

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1. Display the measurement guide screen.
(See page 1.)
2. Select “Voltage drop of power outage, etc.”.
3. Configure the settings as shown below.
4. Select “Start measurement”.
The start confirmation dialog will be displayed.
5. Press the START key to begin measuring.
The MR8880-20 will measure ONCE, and display a
waveform like that shown below.
Capturing the Waveform of a 200 V AC Instantaneous Power Interruption
How to measure the waveform level (instantaneous value) of the waveforms before and after an instantaneous power out-
age on a 200 V AC/60 Hz commercial power supply
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Select
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6. If the waveform you wish to see is not displayed,
change the zoom ratio of the time axis.
7. Scroll through the waveform to check for anomalies.
Select
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Press this key to display the "Scroll" icon on the bottom of the screen.
(This key toggles between "Scroll" and "Cursor".)
Fast scroll
backward Fast scroll forward
Scroll backward Scroll forward
• Use the Scroll function to "fast forward" or "go backwards" through
the waveform.
• To jump to the beginning of the waveform or the latest waveform
captured, press the "fast" and "standard" keys at the same time.
When the zoom ratio of the time axis is changed, the
waveform printout will also zoom in or out accordingly.
1. Press the SET key to open the “Setting” screen.
(Use the SET key to toggle between the 7 screens
until you reach the "Setting" screen.)
2. Configure the parameters in the areas indicated
below.
3. Press the SET key once to open the “CH” screen.
Using Model 9018-50 Clamp On Probe to Measure a Current Waveform
How to measure a 10 A AC/50 Hz current signal using Model 9018-50 Clamp On Probe
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1
A 50 Hz measurement frequency is equivalent to 20 ms per cycle.
When using the 5 ms/div time axis range and selecting to record 15
divisions, a 75 ms waveform can be monitored. (5 ms/div x 15div =
75 ms) This is equivalent to approximately 3.5 cycles.
4. Configure the parameters in the areas indicated
below.
5. Press the START key to begin measuring.
"Waiting for trigger" will be displayed until the set trig-
ger conditions are met.
When the trigger is activated, measurement will occur
once.
The following shows the measured waveform of the
starting current of a motor.
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• The voltage axis range (refer to the "Range" information in the
upper highlighted section in the screen above) represents the volt-
age value per 1div on the vertical axis. (=100 mV/div)
• Because the output of the 9018-50 at the 10 A AC range is 0.2V
AC, the instantaneous peak value of 0.2 V AC will be approxi-
mately 0.28 V (=0.2 V AC x √2). As such, please select a voltage
range in accordance with this level of voltage.
• Because the full scale of the MR8880-20's vertical axis is 10 divi-
sions, when the voltage axis range is set to 100 mV/div, instanta-
neous values up to 1 V (=100 mV/div x 10div) can be measured.
• When changing the current range of the 9018-50 Clamp On
Probe, be sure to also change the "Range" setting in the MR8880-
20 (in the lower highlighted section in the screen above).
• If the measurement ranges do not match, incorrect measurement
values may be displayed and/or recorded.
• The value to set for the trigger level is the instantaneous value.
"0.100 V" is equivalent to "5 A".
T
0.00 A
Trigger point
5.00 A

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1. Connect the storage media (CF Card or USB flash
drive).
Note: The USB flash drive may not be recognized by
the instrument depending on the USB flash drive
used.
2. Press the SAVE key after measurement.
The setting dialog is displayed.
3. Select the connected media, and then select "Wave-
form".
The setting dialog is displayed.
4. Select the "Binary" format and "All" span, and move
the cursor to the "Save" button. Press the ENTER
key.
The confirmation dialog is displayed.
5. Select “Yes”, and press the ENTER key to start sav-
ing.
Save Measurement Data
The following are the instructions on how to save data
after measurement has finished. To learn how to save
data during measurement, please refer to the detailed
instruction manual.
1. Press the WAVE key to display the waveform display
screen.
2. Press the PRINT key on the printer.
The print range confirmation screen appears.
3. Select “All Wave”.
Printing of the waveform begins.
To force printing to end, press the STOP key.
Print Measurement Data
Printing directly from the MR8880-20 requires the
MR9000 Printer. The following are the instructions on
how to print all of the waveforms after measurement has
finished. To learn how to print a certain range of wave-
forms, or about the display screen and print settings,
please refer to the detailed instruction manual.
Print Example
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Select
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Cover (Right side of MR8880-20)
CF card USB flash drive
Use the supplied WaveViewer (Wv) software to view the saved
binary data and/or convert the data into CSV format. Refer to the
instruction manual on how to install the WaveViewer software into
your PC.
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Memo