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.