Sanwa DCM2000DR User manual

DCM2000DR
DIGITAL CLAMP METER
INSTRUCTION MANUAL

Table of Contents
【1】 SAFETY PRECAUTIONS – Before use, read the following safety precautions.–
1-1 Explanation of Warning Symbols ……………………… 001
1-2 Warning Messages for Safe Use ……………………… 001
1-3 Overload Protection……………………………………… 003
【2】APPLICATIONS AND FEATURES
2-1 Applications ……………………………………………… 004
2-2 Features …………………………………………………… 004
【3】NAMES OF COMPONENT UNITS
3-1 Main unit and test leads ………………………………… 005
3-2 Display …………………………………………………… 006
【4】DESCRIPTION OF FUNCTIONS
4-1 Power Switch & Function Switch ……………………… 007
4-2 Auto power save ………………………………………… 007
4-3 Low battery indication ………………………………… 007
4-4
Selecting the measurement function: button … 007
4-5
BACK LIGHT function : ( ) button ………… 007
4-6 Range Hold: button …………………………… 008
4-7 Measuring the relative value: button………… 008
4-8 Data Hold: button ………………………………… 008
4-9 Peak Hold: ( ) button ……………………… 008
4-10 EF (Electric Field) sensing: button ……………… 0010
4-11 Muting the buzzer………………………………………… 010
4-12 AC Detection Method …………………………………… 010
4-13 Crest Factor ……………………………………………… 010
【5】MEASURING PROCEDURE
5-1 Start-up Inspection ……………………………………… 011
5-2
"VUPMPXJNQFEBODFWPMUBHFSFTJTUBODFEFUFDUJOHNFBTVSFNFOU"VUPût7 … 011
5-3
7'%7BSJBCMF'SFRVFODZ%SJWF"$WPMUBHFNFBTVSFNFOU …014
5-4 "$WPMUBHFNFBTVSFNFOU"$7 …………………… 015
5-5
%$WPMUBHF%$WPMUBHF"$WPMUBHFNFBTVSFNFOU%$7%$7"$7 … 016
5-6
Current (A) measurements (ACA/DCA/DCA+ACA) …… 017
5-7
Resistance measurement / circuit continuity check ( / ) … 019
5-8
Capacitance measurement / Diode test ( / ) …………… 020
5-9 EF (Electric Field ) sensing ……………………………… 021
【6】MAINTENANCE
6-1 Maintenance and Inspection …………………………… 022
6-2 Calibration and Inspection ……………………………… 022
6-3 Storage …………………………………………………… 022
6-4 Battery Replacement …………………………………… 023
【7】AFTER-SALE SERVICE
7-1 Warranty and Provision ………………………………… 024
7-2 Repair ……………………………………………………… 024
7-3 SANWA web site ………………………………………… 025
【8】SPECIFICATIONS
8-1 General Specifications ………………………………… 026
8-2 Measuring ranges and accuracies …………………… 027

—1 —
[1] SAFETY PRECAUTIONS
*Before use, read the following safety precautions.
This instruction manual explains how to use your digital clamp meter
FRVJQQFEXJUIUIF%..GBDJMJUZ%$.%3 #FGPSFVTF QMFBTF SFBE
UIJTNBOVBMUIPSPVHIMZUPFOTVSFDPSSFDUBOETBGFVTF"GUFSSFBEJOHJU
keep it together with the product for reference to it when necessary.
Using the product in a manner not specified in this manual may cause
damage to the protection function of the product.
The instructions given under the headings of “ WARNING” and
“CAUTION” must be followed to prevent accidental burn and electric
shock.
1-1 Explanation of Warning Symbols
The meanings of the symbols used in this manual and attached
to the product are as follows:
: Very important instructions for safe use.
t5IF XBSOJOH NFTTBHFT BSF JOUFOEFE UP QSFWFOU BDDJEFOUT
to operating personnel such as burn and electric shock.
t5IF DBVUJPO NFTTBHFT BSF JOUFOEFE UP QSFWFOU JODPSSFDU
handling which may damage the product.
: Refer to Instruction Manual before use
: High voltage hazard : Double or reinforced insulation
: Direct current (DC) : Ground
: Alternate current (AC) : Resistance
: Circuit continuity buzzer : Diode
: Capacitor : Backlight
: EF antenna : Center position/Polarity indication
1-2 Warning Messages for Safe Use
The following instructions are intended to prevent injury such as
burn and electric shock. Be sure to follow them when using the
meter:
 5IJTJOTUSVNFOUJTBMPXWPMUBHFDMBNQNFUFSFRVJQQFEXJUI
the DMM facility. Do not use it with an electric circuit
FYDFFEJOH7
WARNING

—2 —
 7PMUBHFTPWFS%$7PS"$7SNT7QFBLBSF
hazardous to human body. Take care so as not to touch them.
3. Never input signals exceeding the maximum rated input
value (see 1-3).
4. Never use the meter for measuring voltages of lines
DPOOFDUFEUPFRVJQNFOUFHNPUPSTUIBUHFOFSBUFTJOEVDFE
or surge voltage since it may exceed the maximum allowable
overload input.
05. Never use the meter if the meter or test leads are damaged
or broken.
06. Never use the meter with the case or battery lid removed.
0 %VSJOHNFBTVSFNFOUEPOPUIPMEUIFJOTUSVNFOUCZBQPTJUJPO
on the test pin side of the barrier on the test probe or by a
position beyond the barrier on the clamp sensor.
08. Do not switch the function in the middle of measurement.
0 #FGPSFQFSGPSNJOHNFBTVSFNFOUNBLFTVSFUIBUUIFGVODUJPO
and range are properly set.
10. Never use the meter when it is wet or with wet hands.
 /FWFSBUUFNQUSFQBJSPSNPEJGJDBUJPOFYDFQUGPSCBUUFSZ
replacement.
12. Perform start-up inspection and inspect the meter at least
once a year.
13. This meter is for indoor use only.
14. Do not use the instrument in a method other than specified.
0UIFSXJTFUIFQSPUFDUJPOGVODUJPONBZCFTQPJMFE
 5P BWPJE FMFDUSJD TIPDL BMXBZT CF TVSF UP EJTDIBSHF UIF
high voltage charged in the measured device after
measuring insulation resistance.
2. Do not apply the voltage and current inputs simultaneously.
0UIFSXJTFNBMGVODUJPOXJMMIJOEFSBDDVSBUFNFBTVSFNFOU
3. Do not apply a strong force or impact to the clamp sensor
section.
CAUTION

—3 —
1-3 Overload Protection
Functions Input
terminals Max. rated input Max. overload protection input
・
・
#MBDL
+ (Red)
%$"$7 %$"$7
・
7PMUBHFJOQVU
inhibited %$"$7
Clamp sensor
section DC/AC 2000 A DC/AC 2000 A

—4 —
[2] APPLICATIONS AND FEATURES
2-1 Applications
This instrument is an AC/DC clamp meter/digital multimeter of
UIF 3.4 WBMVF SFTQPOTF UZQF EFTJHOFE GPS NFBTVSFNFOUT JO
UIFSBOHFTQFDJGJFECZ*&$$"5*77
It is suitable for current and voltage measurements of low-
WPMUBHFDJSDVJUSZFMFDUSJDFRVJQNFOUBOEQPXFSTVQQMZGBDJMJUJFT
2-2 Features
t4BGFUZEFTJHOJODPNQMJBODFXJUIUIF*&$
t$MBNQNFUFSXJUI%..GBDJMJUZEFTJHOFEGPS%$"$BOE
DC+AC measurements.
t"$NFBTVSFNFOUJOUSVF3.4WBMVFXJUITJNVMUBOFPVT
GSFRVFODZEJTQMBZ
t"VUPQPXFS0''$BOCFEJTBCMFE
t$POWFOJFOUGBDJMJUJFTJODMVEJOHCBDLMJHIU;&30SFMBUJWFWBMVF
EJTQMBZ%BUB)PMEBOE1FBL)PME
t-PXJOQVUJNQFEBODFWPMUBHFNFBTVSFNFOUDBQBCMFPG
attenuating the effects of ghost voltages
t7'%7BSJBCMF'SFRVFODZ%SJWFGSFRVFODZNFBTVSFNFOU
t&'&MFDUSJD'JFMETFOTJOH
Measurement Category (Overvoltage Category)
Measurement Category II (CAT. II):
-JOF PO UIF QSJNBSZ TJEF PG FRVJQNFOU XJUI QPXFS DPSE UP CF
connected to the receptacle.
Measurement Category III (CAT. III):
-JOFGSPNUIFQSJNBSZTJEFPSCSBODIPGFRVJQNFOUXIJDI
directly takes in electricity from a distribution board to the
receptacle.
Measurement Category IV (CAT. IV):
Line from the service conductor to the distribution board.

—5 —
[3] NAMES OF COMPONENT UNITS
3-1 Main unit and test leads
Test Leads
TL-29
Removable test
pin covers
Test pins
Plugs
Barrier
Test probe (red)
Test probe (black)
When not
covered
・
When the removable test pin covers are mounted&$7ʣV
・
When the removable test pin covers are not mounted&$7,,9
Location of
non-contact
EF antenna
Barrier
Trigger
Power/function
switch
Function
button (See
Chapter 4.)
Input terminal for
functions other
than DCA/ACA, +
Input terminal for
functions other
than DCA/ACA,
COM -
Current
measurement
center
position/polarity
indicator
Clamping current
sensor (CT)
Display

—6 —
3-2 Display
Sub value (Frequency) display
Main value display
Units
：Auto range ：7'%
： Low battery indication  ：Peak measurement mode
： Circuit continuity check  ：Diode
：Low input impedance ：Data Hold
：Direct Current ：Alternate Current
：Polarity (-) ：;FSPSFMBUJWFWBMVF

—7 —
[4] DESCRIPTION OF FUNCTIONS
4-1 Power Switch & Function Switch
Turn this switch to turn on and off the power and select a
measuring function.
4-2 Auto power saveSELECT
Auto power save reduces the battery power consumption by turning
the display off automatically in about 34 minutes after the last
operation made on this instrument. To recover from the mode set by
"VUPQPXFSTBWFQSFTTUIF button or the set the power
switch to OFF then ON again.
*Auto power save can be disabled by turning the power/function
switch to ON while holding the button depressed. The
disabling of this mode is indicated by a short beep of the buzzer
beeps and the change of the main value display from 8888 to 0000.
*A small current is flowing even when the display is turned off by Auto
QPXFS TBWF "GUFS NFBTVSFNFOU CF TVSF UP TFU UIF QPXFSGVODUJPO
switch to OFF.
4-3 Low battery indication
When the built-in batteries have been discharged and the voltage has
ESPQQFEUPCFMPXBCPVU7i ” mark appears in the display.
8IFOUIJTNBSLGMJDLFSTPSMJHIUTSFQMBDFCPUIUXPCBUUFSJFTXJUIOFX
ones.
4-4 Selecting the measurement function: button
Press the button to switch the functions in one of the
GPMMPXJOHTFRVFODFT
： Auto →"$7→%$7→Ω →Auto
・： The button is disabled with these functions.
：%$7→%$7"$7→%$7
：ACA →DCA →(DCA+ACA) →ACA
：Ω→  →Ω
：→ →
4-5 BACK LIGHT function : ( ) button
When the button is held depressed (for more than 1
TFD UIF EJTQMBZ CBDLMJHIU JT UVSOFE PO )PMEJOH UIF CVUUPO
depressed again turns the backlight off. The backlight also
turns off automatically in 32 seconds after it is lit.

—8 —
4-6 Range Hold: button
When the CVUUPOJTQSFTTFEUIFNFUFSJTTFUJOUIF
manual mode and the range is fixed. (“ ” disappears from
UIFEJTQMBZ*OUIFNBOVBMNPEFFBDIUJNFUIJTCVUUPOJT
QSFTTFEUIFSBOHFDIBOHFT8IJMFDIFDLJOHUIFVOJUBOE
EFDJNBMQPJOUPOUIFEJTQMBZTFMFDUUIFCFTUSBOHF
5PSFUVSOUPUIFBVUPSBOHFIPMEUIJTCVUUPOQSFTTFEGPS
second or longer. (“ ” appears on the display.) The
backlight lighting is unavailable with the function. The auto
SBOHFDBOCFVTFEPOMZXJUIUIFGSFRVFODZ ) display.
4-7 Measuring the relative value: button
When the CVUUPOJTQSFTTFE lights and the value
assuming that the input value at the moment the button is
pressed is 0 (reference value) is displayed. This mode is canceled
when the button is pressed again. It is disabled with the
GSFRVFODZ ) display.
4-8 Data Hold: button
When the CVUUPOJTQSFTTFE lights and the value
displayed at that moment is held. The display will not vary even
when the measurement input varies. Pressing the button again
extinguishes and the Hold mode is canceled.
*The Hold mode is also canceled when the function switch
position is changed or a button operation other than the
backlight on operation is performed.
4-9 Peak Hold: HOLD ( ) button
When the button is held depressed (for more than 1 sec.)
EVSJOHUIFWPMUBHFPSDVSSFOUNFBTVSFNFOU lights on the
display and the Peak Hold mode is started. Holding the button
depressed again cancels the Peak Hold mode.
*OUIF1FBL)PMENPEFUIFQFBLWBMVFPGXBWFGPSNJTIFMEBU
intervals of 5 msec. provided that the measurement input
continues. The held value is not updated unless the input level
exceeds the current value.
'PSJOTUBODFXIFOUIFJOQVUJTB"TJOFXBWF"$UIFQFBL
value is about 141 A (√2 time the rated value).
t"MNPTUUIFTBNFWBMVFTBSFEJTQMBZFEXJUICPUIUIF"$BOE%$
functions.
t1FBL)PMEEPFTOPUXPSL XJUIUIFOFHBUJWFJOQVUXJUICPUI
the AC and DC functions.

—9 —
t8IFOUIF CVUUPOJTQSFTTFEJOUIF1FBL)PMENPEF
and light and the value displayed at that moment is held.
&WFO UIF EJTQMBZFE WBMVF JT IFME UIF QFBL WBMVF DPOUJOVFT UP
CF VQEBUFE JOUFSOBMMZ TP XIFO UIF button is pressed
BHBJOUPSFMFBTFUIFIFMEWBMVFUIFMBUFTUVQEBUFEQFBLWBMVFJT
displayed.
● Auto range and Auto power save are disabled automatically in the
Peak Hold mode. The button is also disabled in this mode.
●The Peak Hold mode is canceled when the function switch is
switched or the  or button is pressed.
●Examples of Peak Hold measurement:
* The peak value of the negative (-) current is not held.
DC current peak
AC current peak
DC+AC current peak
Measurement impossible
Measurement impossible
Measurement impossible
Measurement possible
Measurement possible
Measurement possible

—10 —
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
√
=0.707 Vp
−
2Vp
π
=0.637 Vp
2
√
Vp
−
2
√
2
π
2π
π
π
Vp Vp 1
π
2π
2π
−
Vp
3
√
=0.577 Vp
−
Vp
2
=0.5 Vp
−
2
3
√
=1.155
3
√
=1.732
2π
τ
0
Vp
−
τ
2π
・
Vp
−
τ
2π
・
Vp
−
2π
τ
−
2π
τ
Vp
4-10 EF (Electric Field) sensing: EF button
'PSEFUBJMTTFFTFDUJPOi&'&MFDUSJD'JFMETFOTJOHw
4-11 Muting the buzzer
Any buzzer sound can be muted by turning the power/function switch to ON
while holding the button depressed. The muting of the buzzer sound
is indicated by the change of the main value display from 8888 to 0000.
5PDBODFMUIFCV[[FSNVUJOHTFUUIFQPXFSGVODUJPOTXJUDIUP0''UIFO0/BHBJO
* This cannot be performed at the same time as disabling of the Auto power save mode.
4-12 AC Detection Method
5IJTNFUFSFNQMPZTUIFSPPUNFBOTRVBSF WBMVFNFUIPEBOEJOEJDBUFTUIF
NBHOJUVEFPG"$BTUIFTBNFBNPVOUPGXPSLBT%$3PPUNFBOTRVBSFWBMVFT
PGTJOVTPJEBMXBWFTBOETVDIOPOTJOVTPJEBMXBWFTBTTRVBSFXBWFTBOE
DIPQQJOHXBWFTDBOCFNFBTVSFECZUIFUSVF3.43PPU.FBO4RVBSFDJSDVJU
(The input signal measurement value is used as the scale of the actual input
signal power. It is therefore measured as a more effective value than the value
obtained by average detection.)
4-13 Crest Factor
The CF (crest factor) indicates the peak value of a signal by dividing it by its
SPPUNFBOTRVBSFWBMVF8JUINPTUDPNNPOXBWFGPSNTTVDIBTTJOVTPJEBM
XBWFBOEDIPQQJOHXBWFUIFDSFTUGBDUPSJTMPX8JUIMPXEVUZDZDMFQVMTF
XBWFGPSNTUIFDSFTUGBDUPSJTIJHI'PSUIFWPMUBHFTBOEDSFTUGBDUPSTGPS
UZQJDBMXBWFGPSNTTFFUIFUBCMFCFMPX
Please measure the crest factor by 3 or less.
7PMUBHFTPG7BSJPVT8BWFGPSNT

—11 —
[5] MEASURING PROCEDURE
5-1 Start-up Inspection
Check the following items before proceeding to measurement.
t &YUFSJPS DIFDL $IFDL UIF FYUFSOBM WJFX GPS JSSFHVMBSJUZ DBVTFE CZ
ESPQQJOHFUD
t $IFDL UIBU UIF CBUUFSZBMBSN  JTOPU MJU *G JU JTMJU SFQMBDF UIF
batteries with new ones.
t"DDFTTPSJFT$IFDLUIBUUIFUFTUMFBETBSFGSFFPGJSSFHVMBSJUZTVDIBT
wire disconnection or crack.
t4FU UIFGVODUJPO TXJUDI UP and short the test pins to check that
the test leads are free of wire disconnection.
t.BLFTVSFUIBUUIFNBJOVOJUBOEIBOEBSFOPUXFUXJUIXBUFSFUD
*GUIFEJTQMBZTIPXTOPUIJOHUIFCBUUFSJFTNBZCFFYIBVTUFEDPNQMFUFMZ
5-2 Auto low-impedance voltage/resistance detecting
NFBTVSFNFOU"VUPût7
1. Do not apply an input signal exceeding the maximum rated value
of each function.
 %VSJOHNFBTVSFNFOUEPOPUDIBOHFUIFGVODUJPOTXJUDI
 %VSJOHNFBTVSFNFOUEPOPUUPVDIUIFUFTUQJOTJEFPGUIFCBSSJFS
of the test probe or the part past the barrier of the clamp sensor.
 8IFO NFBTVSFNFOU JT GJOJTIFE SFNPWF UIF DMBNQ TFOTPS $5
and test lead from the object measured and return the function
switch to the position.
5. Use test leads matching the measurement category of the
measured point.
"TUIFJOJUJBMJOQVUJNQFEBODFJTBTMPXBTLûBIJHIDVSSFOU
GMPXT UISPVHI UIF NFBTVSFE DJSDVJU XIJDI NBZ FYFSU BEWFSTBSZ
effects in measurements of a circuit with ground-fault interrupter
or circuit/device with low current capacity. When measuring a
WPMUBHFUIBUSFRVJSFTIJHIJOQVUJNQFEBODFCFTVSFUPVTFUIF 
or function.
'PSFYBNQMFUIFJOJUJBMNBYMPBEDVSSFOUJO"$7
NFBTVSFNFOUJTIJHIBUN"7YLûCVUUIF
internal resistance is switched immediately so the load current
ESPQTUPBCPVUN"7¨Lû
WARNING
WARNING

—12 —
Function Input Ranges
%$7 %$7 7
"$7 "$7 7
Ω0.0 Ω - 10.00 MΩ 600.0/6.000 k/60.00 k/600.0 k
/6.000 M/40.00 MΩ
5IFBDDVSBDZHVBSBOUFFEGSFRVFODJFTPGUIF "$7
measurement are from 50 to 60 Hz.
①Use the test leads for measurement.
This function measures the input by automatically identifying
UIF UZQFGSPNUIFSFTJTUBODFû "$ WPMUBHF"$7BOE %$
WPMUBHF%$7
The low input impedance makes it possible to reduce the
effects of the ghost voltage overlapped with the measuring
target voltage. The ghost voltage refers to the voltage induced
from adjacent wires and unnecessary floating signals.
②Standby mode
8IFO OP JOQVU JT BQQMJFE UIF NBJO WBMVF EJTQMBZ PG UIF -$%
shows “ ”.
③Identification conditions
t8IFOUIFJOQVUWPMUBHF JTIJHIFSUIBO7UIJTGVODUJPO
automatically identifies whether the input type is AC voltage
"$7PS%$WPMUBHF%$7BOEEJTQMBZTJU
8IFO%$7BOE"$7BSFTVQFSJNQPTFEUIFWBMVFPGUIF
signal with the higher crest value is displayed.
t
When there is no input voltage and the resistance is below 10
.û UIJTGVODUJPOEJTQMBZT UIF SFTJTUBODFWBMVF5IFCV[[FS
beeps if the resistance is lower than the threshold (20 to 200 Ω).
④Low input impedance
t "QQMZJOH B IJHI WPMUBHF UP JOQVU JNQFEBODF PG IVOESFET PG Lû
has a potential of causing a problem. This is the reason that
is displayed to notice the user of the low input impedance mode.
t8IFOUIFEJTQMBZFEWPMUBHFWBMVFJTBCPVU7PSNPSFUIF
input impedance is switched instantaneously to one of the
following values.
7Lû7Lû7Lû7
Lû7Lû

—13 —
AC DC
Notes:
t The fixed function can be selected with the button. The
auto identification mode can be confirmed with [ ] lit on the
main value display when there is no input signal.
t When the button is pressed once while a measurement
WBMVF JTEJTQMBZFEUIF DVSSFOUGVODUJPO û%$7PS "$7 BOE
range are fixed and the instrument is put to the manual range
mode ( extinguished).
The range can be switched by pressing the button again.
Holding the button depressed for more than 1 sec. lights
BOEUIFJOTUSVNFOUFOUFSTUIFBVUPSBOHFNPEFCVUUIFGVODUJPO
is still fixed.
t Auto identification is disabled in the manual range and fixed
GVODUJPONPEF/PUFUIBUXIFOUIFJOTUSVNFOUJTTFUUPUIF
SFTJTUBODFGVODUJPOBOENBOVBMSBOHFNPEFUIFGVODUJPOJTOPU
switched automatically to the voltage function even when a
voltage is input.

—14 —
AC
Function Input Ranges
"$7 0.000 〜7 7
Hz 10.0 〜400 Hz 199.9/1999 Hz
5IFBDDVSBDZHVBSBOUFFEGSFRVFODJFTPGUIJTNFBTVSFNFOUBSF
from 10 to 400 Hz.
5IFGJMUFSDIBSBDUFSJTUJDJTL)[BUBCPVUE#
①Use the test leads for measurement.
②"ESJWFWPMUBHFXJUIXIJDIUIFOPJTFJOUIFDBSSJFSGSFRVFODZJT
cut using a sine wave synthesized with an inverter can be
measured. (Low-pass filter)
③5IFGSFRVFODZ)[JOQVUTFOTJUJWJUZJTEFUFSNJOFECZUIFSBOHF
being used for display. A different input sensitivity can also be
selected manually by pressing the button. If the Hz
WBMVFCFDPNFTVOTUBCMFTFMFDUBIJHIFSWPMUBHFSBOHFUP
BWPJEUIFFGGFDUTPG FMFDUSJDBMOPJTF*GUIF )[ WBMVFJTOVMM
select a lower voltage range.
④ 5IF BVUP SBOHF TXJUDIJOH JT GPS UIF  7 SBOHFT 5IF
SBOHFTXJUDIJOHPGUIF7SBOHFTJTNBOVBM
5-3
VFD (Variable Frequency Drive) AC voltage measurement
5IJT GVODUJPO VTFT B MPXQBTT GJMUFS UP DVU IJHI GSFRVFODJFT "T
there is a possibility that a voltage higher than the displayed value
FYJTUT GJSTU NFBTVSF UIF WPMUBHF XJUI to confirm that there is
no hazardous voltage before selecting the function.
WARNING

—15 —
AC
Function Input Ranges
"$7 0.000 〜7 7
Hz 40.0 〜1999 Hz 199.9/1999 Hz
①Use the test leads for measurement.
②5IFGSFRVFODZ)[JOQVUTFOTJUJWJUZJTEFUFSNJOFECZUIFSBOHF
being used for display. A different input sensitivity can also be
selected manually by pressing the button. If the Hz
WBMVFCFDPNFTVOTUBCMFTFMFDUBIJHIFSWPMUBHFSBOHFUP
BWPJEUIFFGGFDUTPG FMFDUSJDBMOPJTF*GUIF )[ WBMVFJTOVMM
select a lower voltage range.
5-4 AC voltage measurement (ACV)

—16 —
DCV DCV + ACV
DC DC
AC
Function Input Ranges
%$7 7 7
%$7"$7 7 7
Hz 10.0-1999 Hz 199.9/1999 Hz
5IFGSFRVFODZJTOPUEJTQMBZFEXIFO%$7JTNPSFUIBOPG
"$7
①Use the test leads for measurement.
②Each press of the button switches the function in
TFRVFODFPG%$7→%$7"$7→%$7
5-5
DC voltage / DC voltage + AC voltage measurement (DCV/ DCV+ACV)

—17 —
ACA
AC
DCA + ACA
DC
AC
DCA
DC
①Use the clamp sensor for measurement.
②Each press of the button switches the function in
TFRVFODFPG ACA →DCA →(DCA+ACA) →ACA.
5-6
Current (A) measurements (ACA/DCA/DCA+ACA)
5P JNQSPWF UIF NFBTVSFNFOU BDDVSBDZ QPTJUJPO UIF NFBTVSFE
conductor as close as possible to the center of the clamp sensor.
2. Always clamp around a single wire at a time. Correct current
NFBTVSFNFOUJTJNQPTTJCMFJGNVMUJQMFXJSFTBDBCMFXJUINVMUJQMF
conductors or parallel cords are clamped.
3. Correct measurement may be impossible if the clamp sensor is
not closed completely.
4. Malfunction may occur if the instrument is used in a strong
electromagnetic field.
5. When the 0 adjustment is performed by pressing the
CVUUPO EVSJOH UIF %$ DVSSFOU %$" GVODUJPO NFBTVSFNFOU UIF
displayed value may vary by a few counts due to the reason
EFTDSJCFE BCPWF CVU UIJT JT OPU NBMGVODUJPO 5IF  BEKVTUNFOU
should be performed after the orientation of the instrument has
been changed (because of the effects of external magnetic field or
terrestrial magnetism) or when the temperature change is large.
CAUTION

—18 —
5-6-1 AC current measurement (ACA)
Function Input Ranges
ACA 0.0-2000 A 200.0/2000 A
Hz 20.0-400 Hz 199.9/1999 Hz
5IFBDDVSBDZHVBSBOUFFEGSFRVFODJFTPG UIJTNFBTVSFNFOUBSF
from 40 to 400 Hz.
①Press the button so that lights.
②0QFOUIFDMBNQTFOTPSQPTJUJPOUIFXJSFUPCFNFBTVSFEBOE
close the clamp sensor completely.
③Read the displayed value.
Note:
When the clamp sensor is opened/closed or the function is
TXJUDIFEBDPVOUPGTPNFUFOTJTEJTQMBZFEUFNQPSBSJMZ5IJT
display returns to 0 after taking certain time because of the RMS
SFTQPOTFCVUUIFSFXJMMOPUCFQSPCMFNJOUIFNFBTVSFNFOU
value even if the measurement is started before the display
returns to 0.
5-6-2 DC current measurement (DCA)
Function Input Ranges
DCA ±0.0-2000 A 200.0/2000 A
①Press the button so that lights.
②8BJUVOUJMUIFEJTQMBZTUBCJMJ[FTUIFOQSFTTUIF button
to perform the 0 adjustment. ( lights on the LCD display.)
③0QFOUIFDMBNQTFOTPSQPTJUJPOUIFXJSFUPCFNFBTVSFEBOE
close the clamp sensor completely.
④Read the displayed value.
*Align the orientation of the arrow on the side of the clamp
sensor with the orientation of the measured current. If they
BSFOPUBMJHOFEUIFEJTQMBZFEQPMBSJUZCFDPNFToOFHBUJWF