Hioki 8847 User manual

MEMORY HiCORDER
Measurement Guide
8847
December 2010 Revised edition 2 8847A983-02 10-11H
Read first.
Offers an introduction to the Memory
HiCorder's basic measuring method for first
time users.

Introduction
1
Thank you for purchasing the HIOKI "Model 8847 Memory HiCorder."
This Measurement Guide consists of some basic application examples. Before
using the instrument, be sure to read the Instruction Manual carefully.
The following documents are provided with this instrument. Refer to them as appropriate for your applica-
tion.
Contents
Introduction
Document Description
1Measurement Guide
(This document)
Read first.
Offers an introduction to the Memory HiCorder's basic measuring method for first
time users.
2Instruction Manual Contains explanation and instructions regarding the instrument's operating meth-
od and functions.
Screen structure and
operation overview The following explains the screen structure and overview of the
operation keys of the main instrument. (p.2)
Measurement Prepara-
tions The following explains the things to be done before carrying out
measurement. (p.4)
Measurement Procedure The following explains the flow from pre-measurement check to
analysis/saving/printing. (p.6)
Measure the commer-
cial power supply
The following explains how to record waveforms of a commer-
cial power supply of 100 V.
The following explains how to save the data. (p.8)
Monitor abnormal occur-
rences
The following explains how to record a voltage dip caused by a
special occurrence such as a black out.
Using the trigger function to carry out constant monitoring, only
the abnormal occurrence can be recorded.
The following explains the method to automatically save data.
(p.10)
Analyze
Waveform measurement value can be viewed or calculated us-
ing the A/B cursor.
The following explains how to display the measured waveform
without overlapping.
(p.12)
Print The following explains the printing method. (p.17)
Convenient functions The following explains the auto range function, pre-trigger and
probe compensation. (p.19)
Others The following are explanations for the screen, time axis and
sampling, record length setting, voltage axis and optical resolu-
tion, and file transfer speed. (p.21)

Screen structure and operation overview
2
Screen structure In the sheet tab screen, the sheet can be changed by pressing the key.
Screen structure and operation overview
Waveform screen
Screen to set measurement methods, cal-
culations for waveforms, and etc.
File screen
Status screen
Screen to set environment, save file, set
printing, set communication, and initialize
data.
System screen
The screen to set the various Channel
Scaling Comments.
Channel screen
Settings window
Trigger settings
window
Channel settings
window
Screen to view waveforms. Screen to view data files in the media
(CF card, HDD, USB, internal memory).
Window to set details for
the Analog/Logic Channel. Window to set details for the trigger.
Waveform screen can
be displayed.
Sheet tub
Shows names of sheets
that can be selected.

Screen structure and operation overview
3
Operating Keys
ABCSR key
Displays the A/B cursor settings
window.
START key
Starts measurements
The green LED at the upper is lit
during measurement.
Inner: Jog
Outer: Shuttle
Scrolls waveforms
DISP key
Displays the Waveform screen. STATUS key Displays the Status screen.
FILE key
Displays the File screen.
Fkey
Select setting items
PRINT key
Prints waveforms SAVE key
Saves data to storage media.
The LED to the right of the key lights up in blue.
ESC key
Cancels an operation.
Removes the displayed dialog and
window
CURSOR key
Moves the cursor up, down, left and
right on the screen.
KEY LOCK:
Press and hold the right and left
CURSOR keys for three seconds to
disable key operations.
To cancel key-lock, hold the keys
again for three seconds.
TRIG.SET key
Displays the trigger settings window
on the Waveform screen.
CH.SET key
Displaysthechannelsettingswindow
on the Waveform screen.
SYSTEM key
Displays the System screen. CHAN key
Displays the Channel screen.
Manual trigger key
Issues a manual trigger event.
WAVE key
Assigns the Jog & Shuttle knobs to
waveform scrolling.
FEED key
Feeds paper
COPY key
Prints a hard copy of the
display screen
HELP key
Opens help
information AUTO key
Starts auto-range
measurement
STOP key
Stops measurements
1 press: Measurementstopsafterthe
set recording length
2presses:Immediate stop
Move the setting cursor to the item.
To change the setting content
Select
Settings cursor
The current cursor location is
indicated by flashing.

Measurement Preparations
4
Measurement Preparations
At least 5 cm
All at least 5 cm
Install the instrument To prevent overheating, be sure to leave the specified clearances around the unit.
Set the items necessary to the device
Connect the Probes
and Cords
Insert the USB
memory stick
Insert the CF Card.
Set the recording paper
Connect the power cord
Right side
Left side
Front
Refer to the instruction
manual for details.
1
2
2
3
4

Measurement Preparations
5
Supply the power
Power On
Right Side
Setting the clock
Carry out setting in the [Init] sheet. The date and time indication is shown
at the top right of the screen.
Perform zero-adjust
This procedure compensates for input module differences and sets the reference
potential of the instrument to 0 V.
Carry out setting in the [Unit List] sheet.
For best measurement precision, a warm-up period of about 30 minutes after power-on is recommended.
[Exec Zero-Adjust] can still be selected in the channel settings window ([Analog]
sheet).
(Press the DISP key (Waveform screen) →press the CH.SET key (Channel settings
window))
Point
1. Move the cursor to this position.
2. Select [Exec Zero-Adjust].

Measurement Procedure
6
Before measuring, please read “Operating Precautions” in the instruction manual.
Measurement Procedure
Perform the inspection before measurement
Please read “Pre-Measurement Inspection” in the instruction manual.
Connect to the measurement point
Set the measurement conditions
Carry out setting in the Waveform screen.
• Measurement function
• Timebase
• Recording length ([Shot])
Carry out settings in the Channel set-
tings window ([Analog] sheet).
• Vertical axis (Voltage axis) range
Carry out settings other than the above
mentioned, when necessary.
Start or stop measurement
Start Measurement Stop Measurement

Measurement Procedure
7
Analyze, save and print
Scroll and view the waveform.
Waveform display can be changed.
(You can zoom in or out)
Save data.
Data can be automatically saved under the
pre-set saving conditions.
View saved data.
Data can be loaded, and file can be deleted and
copied.
Print the recorded waveform.
Analyze
Save
Print

Measure the commercial power supply
8
The following explains the method of recording voltage waveform for a commer-
cial power supply of AC 100 V (50/60 Hz).
The method of saving the data after measuring will also be explained.
Here the level trigger is used to measure.
To measure repetitive waveforms such as commercial power supply, setting the
measurement start point as the standard level trigger level will make it easier to
observe the waveforms.
Measure the commercial power supply
Trigger
level
0 V
T
1 Prepare for measurement
Required items:
8847
8966 Analog Unit
L9198 Connection Cord
CF Card
"Measurement Prepara-
tions"(p.4)
Insert the CF card.
Connect to CH1.
Connect to the
measuring point.
Connect to the socket.
2 Set the measurement conditions and trigger conditions
Move
the cursor
Displays theWaveform
screen.
Displays the Trigger
settings window
([Analog Trig] sheet)
Displays the Channel
settings window
([Analog] sheet)
Carry out the following setting on the Waveform screen.
Deciding on the horizontal axis (time axis)
range
The horizontal axis (time axis) range is calculated
from the frequency and cycle.
f [Hz] =1/t [s] (f: frequency, t: cycle)
Example: When the measurement frequency is 50 Hz.
E.g. 1 cycle is t= 1/50 [s], i.e. 20 ms.
When the horizontal axis (time axis) is set to 20 ms/
div, exactly 1 cycle will be displayed in 1 division (1
square).
Vertical axis (Voltage axis) range
If you change the range during a measurement, the
measurement will restart.
Level
Set to [0 V].
Set the measurement conditions. (Channel settings window)
Setting for trigger conditions (Trigger settings window)
Select setting
items
Vertical axis (Voltage axis) range
Set the value for 1 div of vertical axis
Trigger type
Set to [Level].
Slope
Set to [↑].
Timebase
Set time for 1 div of horizontal axis. 3
1
2

Measure the commercial power supply
9
Data will be saved under the pre-set saving conditions when the SAVE key is pressed.
Refer to "Analyze"(p.12) for the analyzing method.
3 Set the saving conditions
Move
the cursor
Displays the File
Save sheet.
The following explains the setting method to save immediately by pressing the SAVE key.
Carry out the following setting using the File Save sheet on the System screen.
Select setting
items
*: When [Yes] is set, pressing the SAVE key each time will allow users to select
the saving conditions.
Point
To view the waveform on the instrument, set the [Save Type] to binary and to viewthe waveform
on the computer, set it to text. Data saved as text cannot be viewed on the instrument.
Select at save (Selection Save)*
Set to [No].
Pressing the SAVE key will allow sav-
ing under the saving conditions to be
carried out immediately.
Save conditions
• Save Type: Wave Binary
• Save to: CF Card
• Save Name: TEST
• Save Area: Whole Wave
The setting will appear as shown
on the left screen.
4 Start to stop the measurement
Press the START key.
When the trigger conditions are met, the trigger is
activated and the waveforms equivalent to the pre-
set record length will be recorded.
Trigger level
0 V
Trigger slope [ ↑]
T
Measurement data will be recorded until the
STOP key is pressed.
[Trigger Wait]
5 Save data
Point
Saved data can be confirmed on the File screen when the FILE key is pressed. (p.16)

Monitor abnormal occurrences
10
The following explains the recording method in the case of a drop in voltage
brought about by a black out, etc.
Keep monitoring and save the measurement data automatically.
In this section, a voltage dip trigger is used to measure. The following explains
how to activate the trigger when an input signal from a 50 Hz commercial power
falls from approximately 100 Vrms (141.4 Vpeak) to below 90 Vrms (127.2
Vpeak).
Monitor abnormal occurrences
Trigger Level
T
1/2 cycle
1 Prepare for measurement
Required items:
8847
8966 Analog Unit
L9198 Connection Cord
CF Card
"Measurement Prepara-
tions"(p.4)
Insert the CF card.
Connect to CH1.
Connect to the
measuring point.
Connect to the socket.
2 Set the measurement conditions and trigger conditions
Pre-Trigger
Set the %.
Frequency
Set the frequency.
Move
the cursor
Carry out the following setting on the Waveform screen.
Set the measurement conditions. (Channel settings window)
Setting for trigger conditions (Trigger settings window)
Select setting
items
Set the pre-trigger to
record waveforms that
exist before any abnor-
mal occurrence, such as
a spontaneous black out.
The pre-trigger sets
where the trigger location
(trigger point) is located
on the record length.
E.g. To record 10 DIV worth of waveform
that exist before a spontaneous black out
and which corresponds to a record length
of 25 DIV, set the pre-trigger to 40%.
Calculation method: 10 [DIV]/25[DIV] x 100%
See: "What is a pre-trigger?"(p.20)
40%
T
Recording
length 25 div
60%
Timebase
Set time for 1 div of horizontal axis.
Vertical axis (Voltage axis) range
Set the value for 1 div of vertical axis
Trigger Type
Set to [Drop].
Level
Set to [127 V].
Trigger
Set to [Repeat].
DisplaystheWaveform
screen.
Displays the Trigger
settings window
([Analog Trig] sheet)
Displays the Channel
settings window
([Analog] sheet)
3
1
2

Monitor abnormal occurrences
11
Refer to "Analyze"(p.12) for analysis methods.
3 Set automatic saving
Move
the cursor
Displays the
[File Save] sheet
Carry out the following setting using the file saving sheet on the System screen.
Select
setting
items
Savable media is HDD and CF Card only.
When saving to the CF Card, please ensure that there
is enough capacity and the card is properly inserted.
Save to
Specify the folder to save to.
Auto Save
Set to [On].
4 Start and Stop Measurement
Press the START key.
[Trigger waiting] will be displayed until the commer-
cial power voltage satisfies the trigger conditions
(in this case, until a spontaneous blackout occurs).
When the trigger conditions are met, the trigger is
activated and measurement will start.
Data will be saved automatically to the CF card
and wait the next spontaneous blackout after finish
the measurement.
Measurement data will be recorded until the
STOP key is pressed.
[Trigger waiting]
127.2 V
-127.2 V
Trigger level
1/2 cycle
T

Analyze
12
Analyze
Confirm the measurement waveform
Scroll the waveform
Earlier Later
The location of thewaveform on display can be confirmed with the scroll
bar. The time ( ) below shows when the trigger is activated.
Red bar (Whole waveform)
Blue frame (Screen display range)
Expand or compress the waveform
When A/B cursor appears on the screen,
usethecursorasthestandardtoexpandor
compress.
Change the magnification.
Zoom and view the waveform
The screen is divided vertically into two.
First, move the cursor to the magnification,
and select [Zoom On].
Next, move the cursor to the [Zoom Mag]
item, and set the magnification.
Normal Display
Zoomed Display

Analyze
13
Read measurement value
1. Set the AB cursor.
2
Move
the cursor
Displays the
Waveform screen.
Carry out the following setting by displaying the waveform screen and using the AB cursor setting window.
When trace is set, time value and
measurement value can be seen.
Select
setting items
Displays the AB cursor
settings window.
Kind
Set to [a-B].
Subject Ch
Set to [ALL].
AB cursors
Set to [Trace].
Value of B cursor Difference between A
cursor and B cursor.
t: Time value
1: Measurement value of CH1
Change the type of AB cursor to display only
the time or measurement values.
Change the AB cursor type.
[V Csr]: Time value and Frequency
[H Csr]: Measurement value
Display
1
Value of A cursor
2. Move the AB cursor to the point you wish to see.
Move the cursor to the point of the measurement value on the waveform you wish to see with the jog
shuttle. Move the cursor
B cursor moves.
Change the moving cursor
Change moving target ([Kind]) to change the moving
cursor.
[A] : Use and move A cursor only.
[A-b] : Use the AB cursor to move A only.
[a-B] : Use the AB cursor to move B only.
[A&B] : Move both sides simultaneously.
Factory default is set to [A].
Earlier Later

Analyze
14
When measurements on multi phenomenon are carried out, the waveforms may overlap and become diffi-
cult to see.
When this happens, change the location of the display, or the width of the vertical axis on display to show
the waveforms more clearly.
Display the waveforms without overlapping
The START key is pressed and measurement
has started but the waveforms overlap and
cannot be seen clearly.
Move
the cursor
Displays the Channel
settings window
([Analog] sheet)
Carry out the following settings by displaying the channel setting window in the waveform screen.
Select setting
items
• Can be changed even during measurement.
• Location of logic waveform can also be
changed voluntarily. ([Logic] sheet)
Caution:
When direct current components are loaded on the wave-
form, the waveform appears to fluctuate when the magnifi-
cation is changed. This is because magnification applied to
the direct current component as well.
Zero position
Location of the waveform
can be moved up or down.
Magnification
Waveform can be expanded
orcompressedinthedirection
of the vertical axis.

Analyze
15
Up to 16 can be calculated at once.
Calculation items: average value, execution value, peak value, maximum value, minimum value, cycle, fre-
quency, etc. The calculation method on the measurement data for all the 20 items will be explained here.
When setting window, etc. is displayed in the waveform screen, pressing the ESC key will display the cal-
culation results.
Calculate the measurement data
2. Set the
calculation type 3. Select the calculation
target channel
4. Set the parameters
(calculation conditions)
1. Set to [On].
Move
the cursor
Displays the
[Num Calc] sheet
Carry out the following setting using the calculation sheet on the status screen.
Select
setting
items
Once measurement is completed, calculation automatically starts. The calculation result will be dis-
played on the top right side of the waveform screen.
Displays the
Waveform screen.
In consecutive trigger mode, next measurement will take
place after calculation has been executed.

Analyze
16
Data saved in the main instrument can be confirmed in the file screen.
Viewing Media
1
Select a media
[Media Change]
Select file and folder
Move down
one level
Move up
one level
Data the instrument can save & load
File type File format File extension & Description File type File format File extension & Description
Settings data* Binary SET S, L Settings data
(Measurement Configuration) Waveform management
data
(Memory Divi-
sion / Divided
Saving)
(Index file)
IDX S, L Index data for divided saving
Waveform
data Binary
MEM S, L Memory Function
waveform data SEQ S, L Index data for memory division
(automatically created during
batch saving)
REC S, L Recorder Function
waveform data
Display/
Waveform
screens* BMP BMP S Image data
XYC S, L X-Y Recorder Function
waveform data
Numerical cal-
culation re-
sults Text CSV S Text data
FFT S, L FFT Function data Comment for
printing Text TXT L Text data
Text CSV S Text data
(S: Savable, L: Loadable) However, setting data will not be saved automatically (only manually)
Save the files in the [HIOKI8847] folder.
Setting data
Multiple data can be saved in the instru-
ment, and loaded selectively.
WhensavedintheCFcard[HIOKI8847]
folder,loadingautomaticallystartswhen
the power is supplied.
Waveform data
• To load data in the main instrument,
save as “Binary Format”.
• To load data in the computer, save
as “Text Format”.
2
3
3
2Displays the
File screen.

Print
17
Print the measurement results.
Print
1. Print settings
Print Select
Set to [No].
* To select printing content
each time, select [Yes]
(Refer to below).
Print according to conditions set in the system screen printer sheet.
Displays the
[Printer] sheet
Use this sheet to set other detailed
settings related to the printer, such
as ink density.
Setting does not have to be carried
out every time.
When Execution Print Selection is set to [No],
waveform in this range will be printed.
Select [Whole Wave] or [A-B Wave].
2. Print
FEED key
Send paper. Use this to terminate the printing job or to
increase the space between printing jobs.
Pressing the PRINT key in the waveform screen will print the waveform
immediately.
1
Displays the
Waveform screen.
*In the case of [Print Select] is set to [Yes]
Press the PRINT key to display printing content selection GUI.
Select printing content.
Factory default is set to [Whole Wave].
Whole
Wave :Print the whole waveform data range.
A-B Wave : Print the range specified by the
AB cursor (AB cursor will not be
printed).
About Trig :Print 10 DIV worth of waveform
data from both sides of the trig-
ger position.
List : Print major setting items.
Report :Print the report.
Press the STOP key to terminate the printing job.
Print
2

Print
18
When the COPY key is pressed, the screen can be printed. The display screen will be printed as it is.
Function to print the waveform appearing on the screen not as hard copy, but as waveform printing
together with setting information.
When the waveform display width is changed, A4 size printing is possible, with a similar operation as
report printing.
Hard copy
Press the key.
Printing of waveform display only is also possible.
Use the SYSTEM key to display and set the printer sheet.
Print GUI
Set to [No].
Report printing
In the waveform screen, press the FEED and COPY keys simultaneously.
(Press the FEED key slightly faster).
1
Displays the
Waveform screen.
2
Press
simultaneously
Printing example
A/B Cursor
Settings
Cursor A/B
Value
Channel
Title
Upper and
Lower Limit
Value
A4 size printing
Change the waveform
display width
1
Displays the
Waveform screen.
3
Press
simultaneously
2