DMM SANWA PC720M User manual

PC720M
DIGITAL MULTIMETER
INSTRUCTION MANUAL

Table of Contents
[1] SAFETY PRECAUTIONS
1-1 Explanation of Warning Symbols
1-2 Warning Instructions for Safe Use
1-3 Overload Protection
[2] APPLICATIONS AND FEATURES
2-1 Applications
2-2 Features
[3] Parts Identification
3-1 Multimeter and Test Leads
3-2 Display
[4] DESCRIPTION OF FUNCTIONS
4-1 Power Switch/Function Selector
4-2 Auto Power Saving
4-3 Low Battery Indication
4-4 Measuring Function Selection
4-5 Range Hold
4-6 Data Hold
4-7 Beeper Control
4-8 PC (Personal Computer) Interface
4-9 Data Logging (Recording)
4-10 Test Leads Improper Connection Warning
4-11 Crest capture mode (Sampling time: 1ms)
4-12 MAX/MIN Recording Mode
4-13 Relative Measurement
4-14 Back Light
4-15 Terms
[5] Measuring procedures
5-1 Pre-operational Check
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・
V under Low
Impedance
5-3 AC Voltage ( ) / Frequency (Hz) Measurement
5-4 DC voltage ( )/AC Voltage ( )/
DC+AC Voltage ( ) Measurement
5-5 DC Voltage (m )/AC Voltage ( m )/
DC+AC Voltage (m ), Logic-Level Frequency ( Hz)
and Duty Cycle ( D%) Measurement
5-6 AC Voltage ( m ) / Frequency (Hz) Measurement
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and Conductance (nS) Measurement
5-8 Temperature Measurement
5-9 Capacitance( )Measurement, Diode ( ) Test
5-10 DC Current ( )/AC Current ( )/DC+AC Current ( ),
AC Current ( )/ Frequency (Hz) Measurement
5-11 Measurements with Separately Available Accessories
[6] MAINTENANCE
6-1 Simple Examination
6-2 Calibration
6-3 Battery and Fuse Replacement
6-4 Storage
[7] AFTER-SALE SERVICE
7-1 Warranty and Provision
7-2 Repair
7-3 SANWA web site
[8] SPECIFICATIONS
8-1 General Specifications
8-2 Measuring Range and Accuracy

1
2
3
4
4
5
7
8
8
9
9
10
10
11
11
12
19
20
20
20
20
21
22
24
27
30
33
37
39
42
46
50
56
61
61
62
63
64
64
65
66
68
●Messagesonthedisplay
Messages Description What to do
InEr
Test leads improper connection warning
(Malfunction when low battery)
See 4-10 (Page 19)
See 4-3 (Page 9)
rE-O Self-diagnostic See 6-2 (Page 61)
C_Er

―2――1―
1-2 Warning Instructions for Safe Use
1. Do not use the instrument if the meter or test leads look damaged.
2. Be sure to use the specified fuse.
Neither use unspecified fuse nor short-circuit the fuse holder.
3. Do not apply higher voltage or current than the max. ratings by each
function. (See 1-3)
4. Use caution when working with voltages above 33 V ac rms, 46.7 V ac
peak, or 70 V dc. These voltages pose a shock hazard.
5. Do not use the meter to measure lines that may have inductive voltage
or surge voltage (e.g. motors) because the input voltage may exceed the
maximum rated voltage.
6. Never operate the meter with the case or battery lid removed.
7. Remove test leads from the meter before opening the meter case for
replacing the battery or fuse.
8. Never attempt to repair or modify the instrument, except for battery and fuse
replacement.
9. Do not use any unspecified type of test leads.
10. Keep your fingers behind the finger guards of the test leads while
measurement.
11. Connect the common test lead (Black) before you connect the live test lead
(Red). Disconnect the live test lead first.
12. Make sure the function, range, and measuring terminals are properly set.
13. Do not switch the function, range, or the plugs to another while
measurement.
14. Do not operate the meter when it is wet or with wet hands.
WARNING
Incorrect measurement may be performed in a ferromagnetic or
intense electric field near transformers, high-current circuits, and
radio equipments.
CAUTION
[1] SAFETY PRECAUTIONS
*Before use, read the following safety precautions.
This instruction manual explains how to use your digital multimeter
PC720M. Before using, read through this manual to reduce the risk
of fire , electric shock, and/or injury. And save it together with the
product so that you can refer to the manual as necessary.
Use the instrument only as specified in this manual or the protection
provided by the instrument may be impaired.
The instructions given under the headings of " WARNING" and
must be followed to prevent accidental burn andelectric shock.
1-1 Explanation of Warning Symbols
The meanings of the symbols used in this manual and attached to
the product are as follows.
:Extremely-important instructions for safe use
・
WARNING identifies conditions and actions that could result in
accidental burn and electric shock.
・
CAUTION identifies conditions and actions that could cause
damage the instrument.
:Do not touch! Possible high voltage.
:Ground :Diode Hz:Frequency
:Fuse :Beep :Logic-Level Frequency
:Direct Current(DC) :Capacitor :Duty Cycle
:Alternate Current (AC) : Nano-Siemens (Conductance)
:Resistance :Low Input Impedance
:Temperature ：Double Insulation or Reinforced
:Back light

―4――3―
[2]APPLICATIONS AND FEATURES
2-1 Applications
This instrument is a portable digital multimeter designed to
measure light electric circuits. The instrument offers not only
measurements for small communication equipments, home
electric appliances, output from a wall socket, and many batteries,
also circuit analyses with additional functions.
2-2 Features
 Compliant with IEC61010-1 CAT. Ⅲ600 V, CAT. Ⅱ1000 V, and
safe design using fuses with large number of breaking capacity.
 9999 count display (ACV, DCV, Hz, nS)
 Fast response display
(Numeric parts: 5 times/Sec. Bar graph part: 60 times/Sec.)
 Dual Display shows "Voltage or Current and its Frequency", and
"AC components and DC components of Voltage or Current"
 True RMS detection for alternate current (AC) (True RMS)
 DC+AC indications available
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 Maximum DC/AC voltage measurement resolution: 0.01 mV
 Frequency (Sensitivity selectable),
Wide capacitance range (0.01 nF to 25.00 mF)
 Automatically range selectable Crest Capture Mode
Sampling time: Approx. 1 ms
 MAX/MIN recording mode with auto ranging
 Relative mode with auto ranging
 Back light to allow for easy visibility in low-lit area
 2 channel simultaneous temperature measurement
(K-type thermocouple: –50 ℃to 1000 ℃)
 Logging function to store up to 87,328 readings
(single display) or 43,664 readings (dual display)
 PCLink7 (separately available software) allows you to download
logged data into your PC with USB optical communication unit
(KB-USB7)
1-3 Overload Protection
Function Measuring
Terminal Max. Rated Input Overload Protection
「 」
and
1000 V dc/ac
1100 Vrms
「 」,「 」
「 」,「 」 10 V dc/ac
「 」,「 」 Do not apply
any voltage or
current.
「 」
T1+ and -
50 mV dc
T2+ and -
0.4 A/1000 V Fuse
Breaking capacity: 30 kA
and
11 A/1000 V Fuse
Breaking capacity: 20 kA
「 」,「 」
m AμA
and 600 mA dc/ac
Do not apply
any voltage.
0.4 A/1000 V Fuse
Breaking capacity: 30 kA
「 」 and 10 A dc/ac
Do not apply
any voltage.
11 A/1000 V Fuse
Breaking capacity: 20 kA
*The 0.4A fuse has a Time-Current Characteristic Curves projection
of approaching infinity at 0.6 A.
It has a fast acting characteristic of below 0.1 second at beyond 1.5 A.
This protection characteristic matches this meter nicely.

LCD display
Select button
(Backlight button)
Range hold button
(Temperature function
selector)
Crest capture button
MAX/MIN
recording button
Data logging button
Relative button
Power/
Function selector
Measuring terminal
for A
Measuring terminal
for mAμA
Common terminal
measuring
terminal
Data hold button
Light shielding magnet cap
Optical
communication
unit connector
Stand
Battery door
Holster
Finger guards
Plugs Test probe (red)
Test probe (black)
Test leads TL-23a

Detachable test pin covers
Test pins
⇒
↑
↓
Lightshieldingmagnetcap
Attached
Magnetically attractable
material wall (e.g. steel)
DMM body
Attach the light shielding magnet cap
with side touched to the wall.
―6――5―
[3] Parts Identification
3-1 Multimeter and Test Leads
With the detachable test pin covers: CAT. III 600 V
Without the detachable test pin covers: CAT. II 1000 V
How to detach the light shielding magnet cap
Turn the light shielding magnet cap counterclockwise to detach.
An application of the light shielding magnet cap
Note:
Keep the light shielding magnet cap away from cellular phones,
analog watches, floppy disks, magnetic cards, magnetic tapes, and
magnetic tickets. Otherwise, the memorized information may be lost.

① Main display
② Sub display
③ Analog bar graph
④ Relative mode indicator
⑤ Auto range mode indicator
⑥ Data hold indicator
⑦ Recording mode indicator
⑧ Crest capture mode indicator
⑨ Max/Min updating indicator
⑩ DC measurement indicator
⑪ AC measurement indicator
⑫ Temperature measurement indicator
⑬ Polar character
⑭ Low impedance measurement indicator
⑮ Continuity check indicator
⑯ Low battery voltage indicator
⑰ Unit of readings for main display
⑱ Unit of readings for sub display
①
②
③
④
⑤⑥
⑦
⑧
⑨
⑩
⑩
⑪
⑪
⑫
⑫
⑬
⑭
⑮⑯
⑰
⑱
―8――7―
3-2 Display [4] DESCRIPTION OF FUNCTIONS
4-1 Power Switch/Function Selector
Turn the switch to turn on/off the power and select a measuring
function. All segments of the LCD display will be turned on for 2
seconds after power-on, and then the meter will be ready to use.
Note:
The push buttons between the display and the function selector
work differently depending on how long you press. In this
manual, "press" means pressing momentary and "press and
hold for 1 sec. or more" means pressing longer.
4-2 Auto Power Saving
The Auto Power Saving mode turns the meter off automatically
after approximately 30 minutes of no activities. While the Auto
Power Saving mode, following activities set the Auto Power
Saving back.
1) Function selector or push button operations
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test, or continuity check, non-zero readings in the Duty cycle/
Frequency measurement functions, any readings in the
temperature measurement function, or significant measuring
readings of above 512 counts in the other function ranges.
Following activities disable the Auto Power Saving mode
automatically.
1) Crest capture mode or MAX/MIN recording mode is in use
2) Data logging operation is in use
3) Data communication to your PC is in use
4-2-1 How to get back from the Auto Power Saving
Press the SELECT, RANGE HOLD, △REL、or HOLD button, or
disconnect the object to measure and turn the power switch off
and then back on, and select a function before connecting the
object.

―10――9―
・
「 」
：>@⇒[ @ ⇒>Q6@⇒>@⇒…
・
「Temp」
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・
「 」
：[ @⇔[ @
・
「 」
：[ (m) @ ⇒[ (m) / ( m) @ ⇒[ (m) / (m) @ ⇒[ (m) +]@ ⇒
[ (m) @⇒…
・
「 」
：[ μ@ ⇒[ μ/μ@⇒[ μ/μ@⇒[ μ+]@ ⇒[ μ@ ⇒…
At the Temp position, press REANGE HOLD button ( ⇒) to select what
the display shows on the temperature measurement as follows.
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Note:
The last selection of each function will be saved as power up
default for repeat measurement convenience.
(Except function)
4-5 Range Hold
Press the RANGE HOLD button to select manual-ranging, and the
meter will remain in the range it was in. ( turns off.) In
the manual-ranging mode, press the button again to step through
the ranges. Select an appropriate range making sure units and
decimal point positions. To resume auto-ranging mode, press and
hold the button for 1 second or more.
Note:
Manual ranging mode is not available in the Hz functions.
4-6 Data Hold
Press HOLD button to freeze present reading for later view. (
indicator turns on.) Input fluctuation will not reflect on the indicated
value. Press the HOLD button again to disable the data hold
feature and go back to the normal measurement mode. (
indicator turns off.)
Note:
Function changes or functional operations will cancel the data hold feature.
4-2-2 How to disable the Auto Power Saving
Press the SELECT button while turning the meter power on.
Release the SELECT button after is turned off. (All
segments of the display turn on after power-on.) Then the meter
will be ready to use.
Turn the power switch OFF and then back on to resume.
Note:
Even in the Auto Power Saving mode, approx. 50 μA will be
consumed. When in the auto power saving mode, intense light
like the direct sunlight into the optical communication unit on
the back of the DMM increases the consumption current. To
prevent unexpected battery wearing down, mount the attached
light shielding magnet cap on the optical comminucation unit
connector when not in use. Always turn the power switch to the
OFF position when the meter is not in use for a long time.
4-3 Low Battery Indication
Decreasing the internal battery voltage to approx. 7 V due to
wearing down turns on the indicator on the LCD display.
Replace the battery with new one when the indicator turns on.
Use under "Low Battery" may cause malfunctions and "InEr" may
be indicated on the display. Replace the battery with new one to
release the error.
4-4 Measuring Function Selection
At each position of the function selector, press SELECT button
(⇒) to select measuring functions as follows.
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9/R=@⇒…
・
「 」
：[ +]@⇔[ Hz/ @
・
「 」
：[ @⇒[ / @ ⇒[ / @⇒[ @ ⇒…
・
「 」
：[ m @ ⇒[ m / m @ ⇒[ m / m @ ⇒[ @ ⇒>'@
⇒[ m @⇒…
・
「 」
：[ m +]@ ⇔[ Hz/ m @

―12――11―
4-7 Beeper Control
Press the RANGE HOLD button while turning the meter power on
to disable the beeper. Release the RANGE HOLD button after
is turned off. (All segments of the display turn on right after power-
on.) Then the meter will be ready to use. Turn the power switch
OFF and then back on to resume.
Note:
The beeper for the continuity check and the plug improper
connection warning will not be disabled.
4-8 PC (Personal Computer) Interface
The instrument equips with an optical isolated interface port at the
meter back for data communication. KB-USB7, dedicated USB
optical communication unit (separately available), and PCLink7,
dedicated software, allow you to transfer real time readings and
internally logged data to your PC. For more information, see the
"HELP" for PCLink7 (PC linkage software).
4-9 Data Logging (Recording)
The data logging feature to store up to 87,328 readings (single
display) or 43,664 readings (dual display) The instrument employs
nonvolatile memory. The internal memory data will remain even
after power-off or replacing the battery.
Note:
The data logging feature is not available in
「 」
mode.
Use of data logging function disables the crest capture mode,
MAX/MIN recording mode, the relative measurement, and Data
Hold function.
4-9-1 Set logging interval
①Select a function you need, then press button for 1 sec. or
more.
②The sampling speed (interval) will be displayed in second.
The "t0.05" (factory default) means the sampling interval is 0.05
second (20 times /Sec.).
③Press ▲or ▼to select one from followings.
(Shortest) 0.05 s, 0.1 s, 0.5 s, 1 s, 2 s, 3 s, 4 s, 5 s, 10 s, 15 s,
30 s, 60 s, 120 s, 180 s, 300 s, 600 s (Longest)
Each of the following functions has its specific shortest time
interval.
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④Press button for 1 sec. or more to set.
Then newly set time interval on the display will brink 2 times
to make sure.
⇒
USB Optical Communication Unit
(KB-USB7)
Optical Communication Unit Connection
Note:
Intense light like the direct sunlight into the optical communication
unit on the back of the DMM increases the consumption current.
Mount the attached light shielding magnet cap on the optical
comminucation unit connector when not in use.

② / ③  ④
① ② / ③
More than 1 second
More than 1 second
0.5s
More than 1 second
―14――13―
4-9-2 Start/Stop Data Logging
 The Meter supports multi-session data-logging. Multiple
functions can be logged one-at-a-time into the meter's free
memory up to 999 separate session-pages without erasing
the formerly logged one(s).
 Then press the button to start a new logging session
directly without erasing the formerly logged one(s). Or you
can press the ▼button to erase ALL of the formerly logged
session-page(s), and start a new logging session from the
very first session-page (P.001) with maximum meter memory.
 The bar-graph turns to a swinging pointer when data-logging
mode is running.
 Press button for 1 sec. or more to start the data-
logging mode. “LEFt” displays momentarily followed
by a number to indicate the memory points left for new
logging session(s). (Sub / main displays for most-
significant / least-significant numbers separately.)
When the number of logged data reaches the loggable max
value, will be indicated and the logging ends. If you
need the logged data in the internal memory, transfer the
data to your PC and save them. (See 4-8 on the page 11.)
To start a new logging session, erase the past logged data.
Below example illustrates 43,102 memory points are available
for new logging session(s).

Newloggingstarts
withouterasing
Newloggingstarts
aftererasing
OR
0.5s
0.5s
(PAUS)
● (CONT) ■ (STOP)
More than 1 second
―16――15―
 Press SELECT button to toggle the LCD display between
measuring data and logged data item number. (Sub / main
displays for most-significant / least-significant numbers
separately.)
4-9-3 Pause/Continue Data Logging
 Press (PAUS/CONT/STOP) button to pause/continue/
stop logging.
 Press (PAUS/CONT/STOP) button for 1 sec. or more to
stop logging.
 When a sampling speed of 30 s or longer is selected, the
meter will enter a 50 % power down mode between data
logging measurements displaying only the swinging pointer.
Press the SELECT button to resume the real time display,
approx. 4.2 minutes after data logging has started.

0.5s
0.5s
―18――17―
4-9-4 Recall logged data
 Press the ▲and ▼buttons simultaneously to enter the
Recall mode. The last session-page number shows up for 0.5
second before displaying the last logged data item.
and indicators turn on.
 Press the ▲or ▼button to review the logged data one-at-
a-time in sequence. Press and hold for 1 sec. or more for fast
scrolling. The beeper sounds when the first or last data is
reached.
 Press the SELECT button to toggle the LCD display between
logged data and its item number.
 Press the RANGE HOLD button to make sure the set reading
time interval.
Press the ▲and ▼buttons simultaneously again to select
another session-page in sequence. Press them and hold for
1 sec. or more for fast scrolling, and the beeper sounds when
the first or last page is reached.
Turn the function selector to another function or OFF to exit the
RECALL mode.

―20――19―
4-11 Crest capture mode (Sampling time: 1 ms)
Press the CAPTURE button to activate the crest (Instantaneous
Peak-Hold) mode to capture voltage or current signal duration
which is longer than 1 ms. and MAX indicators
turn on. The meter beeps when new MAX (maximum) or MIN
(minimum) reading is updated. Press the button to read the
MAX , MIN, and MAX-MIN (peak to peak) readings in sequence.
Press the button for 1 sec. or more to exit the crest mode. Auto-
ranging (up range) remains, and Auto Power Saving is disabled
automatically in this mode.
4-12 MAX/MIN Recording Mode
When this mode is activated, the reading update rate will be
increased to 20 times/sec. in the voltage measurement or
current measurement function, and the update rate in the other
function ranges will remain.
Press the REC button to activate the MAX/MIN recording mode.
and “MAX-MIN” turn on. The meter beeps when new
MAX (maximum) or MIN (minimum) reading is updated. Press
the button to read the MAX , MIN, and MAX-MIN (peak to peak)
readings in sequence. Press the button for 1 sec. or more to exit
the MAX/MIN recording mode. Auto-ranging remains, and Auto
Power Saving is disabled automatically in this mode.
4-13 Relative Measurement
Press the REL button to activate the relative measurement
mode and indicator turns on. The relative measurement
mode offsets the meter to display relative values against a
reference. The meter displays its readings subtracting the
reading at the moment the REL button is pressed. Press
REL button again to exit the relative measurement mode. This
feature is available also while the MAX/MIN recording mode.
4-14 Back Light
Press the SELECT button for 1 sec. or more to turn the backlight
on. (Automatically turns off after approx. 30 sec.)
Press the SELECT button again for 1 sec. or more to turn the
backlight off.
4-10 Test Leads Improper Connection Warning
The meter beeps as well as displays “InEr” to warn the user
against possible damage to the meter due to test leads improper
connections to the , or measuring jacks when
other function (like voltage function) is selected. (Temperature
measurement function is an exception.)
Note:
“InEr” warning may be indicated due to weak battery even if the
test leads are connected properly.

Input Waveform
0 to PEAK
Vrms
Average
Value Crest Factor Form Factor
Root Mean
Square Value
Vavg
Vp/Vrms
Vrms/Vavg
Sinusoidal
wave
Square
wave
Chopping
wave
Pulse
=1.414 =1.111
Vp
Vp
Vp
1
0
0
p p
Vp
Vp
0
Vp
−
Vp
2
√
=0.707Vp
−
2Vp

=0.637Vp
2
√
Vp
−
2
√
2
π



Vp Vp 1



−
Vp
3
√
=0.577Vp
−
Vp
2
=0.5Vp
−
2
3
√
=1.155
3
√
=1.732

τ
0
Vp
−
τ

・
Vp
−
τ
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・
Vp
−
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τ
−
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τ
Vp
Checkforthecontinuity.
―22――21―
4-15 Terms
Analog bar graph
The analog bar graph provides a visual indication of
measurement like a traditional analog meter needle.
True RMS
True RMS is a term which identifies a DMM that responds
accurately to the effective RMS value regardless of the
waveforms such as: square, sawtooth, triangle, pulse trains,
spikes, as well as distorted waveforms with the presence of
harmonics. This instrument employs the True-RMS (Root-Mean-
Square) detection.
Crest Factor
Crest Factor is the ratio of the Crest (instantaneous peak) value
divided by the True RMS value. Most common waveforms such
as sinusoidal wave and chopping wave have a relatively low
crest factor. A low duty cycle wave form like pulse string has
a high crest factor. For voltages and crest factors for typical
waveforms, see the table below. Please note that measurement
should be made under the crest factor below 3.
1. Do not use the instrument if the meter or test leads look
damaged.
2. Make sure the test leads and the fuse are not broken.
WARNING
Make sure the low battery indicator is off after power-on. Replace
the battery with new one if the indicator is on.
CAUTION
Perform pre-oparational check for safety.
(Inspection using continuity check)
[5] Measuring procedures
5-1 Pre-operational Check

―24――23―
Contact us for repair.
START
Meter/Test leads damaged?
①Connect the red plug of the test lead to measuring
terminal and the black one to the COM terminal.
②Set the function selector to .
③Press the SELECT button to select the continuity check ( ).
④Short-circuit between the red and black test pins.
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Beeper sounds?
Finished
Does not turn on.
Does not sound.
Turns on. Sounds
Looks OK
Damaged
*In the case nothing is displayed, check for the battery.
5-2
「 」
(Max. rated input voltage: 1,000 V dc/ac,
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・
V under Low Impedance
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V function automatically selects measurement
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between the test leads.
 With no input, the meter displays “Auto” when it is ready.
 When a signal out of -1.0 Vdc to 1.5Vdc or 3 Vac up to the
rated 1,000 V is present, the meter displays the voltage value
in appropriate DC or AC, whichever larger in peak magnitude.
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present, the meter displays the resistance value. When below
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further gives a continuity beep tone.
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・
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the LCD to remind the users of being in such low impedance mode.
Peak initial load current, while probing 1000 V ac for example, can be
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・
V mode on circuits that could be damaged by
such low input impedance. Instead, use function selector or
high input impedance voltage modes to minimize loading for such
circuits.
WARNING

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―26――25―
1) Measuring range (Automatic function selection)
 LoZ : 1.5 Vdc to 999.9 Vdc, -1.0 V to -999.9 Vdc
 LoZ : 3 Vac to 999.9 Vac (50/60 Hz)
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2) Measuring procedure
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V measuring
terminal and the black one to the COM terminal.
②Set the function selector to .
③Apply the test pins (Red and Black) to the object to measure.
④Read the display.
Note:
 Range-Lock and Function-Lock Feature:
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・
V
mode, press the RANGE or SELECT button to lock the range or
function it was in. Press the button repeatedly to step through
the ranges or functions.
 Voltage Hazardous Alert:
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・
V mode, an
unexpected display of voltage readings alerts you that the object
under test is being energized.
 Ghost voltage Buster:
Ghost voltages are unwanted stray signals coupled from
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ghost voltages leaving major signal values on meter readings.

/ Hz Hz /
―28――27―
1) What to measure
・(ACV): Sine wave voltages such as output from a wall socket.
・Hz (Frequency): Frequency on a AC circuit.
2) Measuring ranges
・: 9.999V, 99.9 V, and 999.9 V
・Hz: 15.00 Hz to 10.00 kHz (Auto ranging)
3) Measuring procedure
①Connect the red plug of the test lead to the VHz measuring
terminal and the black one to the COM terminal.
②Set the function selector to .
③Press the SELECT button to select a display style.
④Apply the test pins (Red and Black) to the object to measure.
⑤Read the display.
1. Do not apply any input signal exceeding the max. rated input
voltage.
2. Do not switch the function selector while measuring.
3. Keep your fingers behind the finger guards of the test leads
while measurement.
WARNING
5-3
「 」(Max. rated input voltage: 1,000 V dc/ac)
 AC Voltage ( )/Frequency (Hz) Simultaneous Measurement
Note:
Hz input sensitivity varies automatically with a selected voltage
range. 9.999 V range has the highest sensitivity and the 999.9 V
range has the lowest sensitivity. Auto ranging measurements
normally set the most appropriate trigger level. You can also press
the RANGE HOLD button to select another trigger level (voltage
range) manually.
If the Hz reading becomes unstable, select higher voltage range
to avoid electrical noise. If the reading shows zero, select lower
voltage range.

―30――29―
Range Frequency measurement (Hz)
Input sensitivity (Sine wave) Frequency range
9.999 V 2.5 V
15.00 Hz to 10.00 kHz99.99 V 25 V
999.9 V 100 V
The display style of [Hz/ @GRHVQRWVKRZWKHEDUJUDSK
As a normal condition, non-connected test leads may cause
unstable readings.
5-4
「 」(Max. rated input voltage: 1,000 V dc/ac)
・DC Voltage( ) measurement
・DC Voltage( )/AC Voltage( ) simultaneous measurement
・DC+AC voltage( )/AC Voltage( ) simultaneous
measurement
1) What to measure
・(DC Voltage): Batteries, DC circuit voltages, etc.
・/ (DC voltage component/AC voltage component)
・/ (DC/AC superimposed signal voltage/AC voltage
component)
2) Measuring ranges
・, /, /: 9.999 V, 99.99 V, 999.9 V
3) Measuring procedure
①Connect the red plug of the test lead to the V measuring
terminal and the black one to the COM terminal.
②Set the function selector to .
③Press the SELECT button to select a function you want to
perform.
④Apply the test pins (Red and Black) to the object to
measure.
⑤Read the display.
1. Do not apply any input signal exceeding the max. rated input voltage.
2. Do not switch the function selector while measuring.
3. Keep your fingers behind the finger guards of the test leads while
measurement.
WARNING

/ /
―32――31―
Note:
・The display style of [ / @RU> / @GRHVQRWVKRZWKHEDUJUDSK

mm/ m
―34――33―
5-5
「 」(Max. rated input voltage: 10 V dc/ac)
・DC voltage (m ) measurement
・DC Voltage (m )/AC Voltage(m ) simultaneous measurement
・DC+AC Voltage (m )/AC Voltage (m ) simultaneous measurement
・Logic-level frequency ( ) measurement
・Duty cycle ( D%) Measurement
1. Do not apply any input signal exceeding the max. rated input
voltage.
2. Do not switch the function selector while measuring.
3. Keep your fingers behind the finger guards of the test leads while
measurement.
WARNING
1) What to measure
・m(DC voltage): DC circuit voltage lower than 600 mV
・m/m (DC voltage component/AC voltage component)
・m/m (DC/AC superimposed signal voltage/AC voltage
component)
・(Logic level frequency): 3 V, 5 V logic circuit frequency
・D%(Duty cycle): Logic level signal duty cycle (Square wave)
2) Measuring ranges
・m, m /m , m /m : 60.00 mV and 600.0 mV
・: Auto ranging, 5 Hz to 1.000 MHz (Square wave)
・D%: 0.00 % to 100.0 % (Square wave 5 Hz to 10 kHz)
3) Measuring procedure
①Connect the red plug of the test lead to the VHz measuring
terminal and the black one to the COM terminal.
②Set the function selector to .
③Press the SELECT button to select a function you want to
perform.
④Apply the test pins (Red and Black) to the object to measure.
⑤Read the display.

m/ m D%
―36――35―
Note:
・The display style of [m /m @>P /m @> @
or [ '@GRHVQRWVKRZWKHEDUJUDSK