Safety Information - Before use, read the manual -Specification

This product has been designed and manufactured in accordance with the safety
standards applicable to IEC 61010-2-32 Electronic Measuring Equipment andhas passed the inspection. Using this product in ways not specified in this manual
may damage its protection function. The instructions given under the heading of“WARNING” and “CAUTION” must be followed to prevent accidents.

General Specification

CAUTION : Intended to prevent personal injury such as burn andelectric shock and other serious accidents.
WARNING : Intended to prevent misuse that could result in personal
injury and damage to equipment including this instrument.

WARNING
1. This is a clamp meter for low-voltage circuits. Never use it on thepower line that exceeds 600VAC to ground. The measurementclassification category of this instrument is 300 V CAT. III, 600V
CAT. II.
2. Use the meter only as described in this manual.
3. Do not apply more than the rated maximum input (400VAC).
4. Pay special attention to voltages above 33VAC (46.7 Vpeak) and70VDC that are hazardous to the human body.
5. Do not use the meter if it is damaged or broken.
6. Do not use the meter the battery lid or rear case removed.
7. During measurement, keep your fingers behind the barrier (fingerguard).
8. When measuring un-insulated counductors, be careful not to touchthem. Otherwise you will suffer electric shock.
9. Do not use the meter near flammable gases or solvents.
10. Do not use the meter with wet hands or in a damp environment.
11. Do not disassemble or modify the meter nor use components not
specified by the manufacturer.
12. Inspect the meter at least once a year.
13. The meter is for indoor use.

Electrical Specification

Digital Display: 3 3/4 digits LCD display with maximum reading 3999
Analog Display: 42 segments fast analog bar display
Symbol and Scale range:
adjust automatically according range and input signal
Polarity:
When negative signal in apply to the meter,
will show.
Over Load:
When the signal larger than the maximum will be show
Sample Rate: 2 times/sec for digital data
20 times/sec for analog bar
Low Power Indication:
When the battery is under the proper operation range,
will appear on theLCD display.
Power Source: LR03 or AAA 1.5V battery x 2.
Auto Power Off:If there is no key or dial operation for 30 minutes, the meter will power itself
off to save battery consumption.
Battery Life: Approx. 50hr (Alkaline Battery)
Power Consumption: 50mW
Clamp opening size: 25mm
Operating temperature: 0˚C ~ 40˚C,<80% RH, No condensation
Storage temperature: -10˚C ~ 60˚C,<70% RH, No condensation
Approvals: IEC61010-2-32 300V CAT.III 600V CAT.II
Environmental conditions:
Altitude up to 2000 meters, indoor use, pollution degree2
Withstand voltage: AC3.7kV (50/60Hz) for a minute.
Dimension (L x W x H) :193 x 50 x 28mm
Weight: 230g
Accessory:
Instruction Manual, Carrying case (C-DCM400), Test lead (TL-23a)

DCM400AD
DIGITAL CLAMP METER

Dempa Bldg,Sotokanda2-Chome
Chiyoda-Ku,Tokyo,Japan

Button Instruction

Symbol Definition

Instrument Familiarization

Zero Button
Press Zero button to enter the Zero mode, "" annunciate turn on and Zerothe display and the reading is stored as reference value for subsequent
measurement.
Press it again, the "" annunciate blinking and memorized reference value
will display.
Press and hold down zero button for 2 second to exit the zero mode.
When the tester is under zero mode the auto range function will be disabled.

The accuracy specification is defined as ±( …%reading+…count )At 23±5˚C, ≦80%RH
DCV (Auto range, Manual range)
Range

Resolution

Accuracy

Input
Impedance

Overload
Protection

400V
600V

0.1V
1V

± (1%rdg.+2dgt.)

10MΩ

660Vrms

50Hz〜500Hz

Input
Impedance

Overload
Protection± (1.5%rdg.+5dgt.)

10MΩ

660Vrms

SANWA ELECTRIC
INSTRUMENT CO.,LTD.

①ACV (Auto range, Manual range)
Range

Resolution400V
600V

0.1V
1V

Accuracy

Resolution

40A
400A

⑧③

DCA (Auto range, Manual range)
Range②0.01A
0.1A

Accuracy± (2.5%rdg.+10dgt.)⑨Overload
Protection
600Arms⑩④

ACA (Auto range, Manual range)
Range

Resolution

AccuracyBand Width

Overload
Protection

40A
400A

0.01A
0.1A

± (2%rdg.+10dgt.)

50Hz〜500Hz

600Arms

MAX Test
Voltage

Overload
Protection

1.5VDC

600Vrms

Ohm (Ω)Range

Resolution

400Ω

0.1Ω

Continuity (Range

Accuracy± (1%rdg.+2dgt.))
Active Region<40Ω

MAX Test
Voltage

Overload
Protection

1.5VDC

600Vrms

Measuring Instruction
AC Current Measurement
Switch the main function selector torange.
Open the clamp by pressing the jaw-opening handle and insert the cable to bemeasured into the jaw.
Close the clamp and get the reading from the LCD display.
Note:
Before this measurement, disconnect the test lead with the meter for safety.
In some occasion that the reading is hard to read, push the HOLD button andread the result later.

Low battery indication

Alternative source indication

Auto range indication

Direct source indication

Manual range indication

Resistance

Hold Data indication

Polarity indication

Continuity function indication

Analog bar graph indication

Data Hold & Manual Range Button
The user may hold the present reading and keep it on the display by pressingthe "Hold" button.
When the hold data is no longer needed, one may release the data-holdoperation by press "Hold" button again.
One may hold present reading by press the hold button instantaneously. Onemay also change the measuring scale range by press and hold theRANGE
button. When the decimal point changes, the user should release the button andscale range will stay at the setting range. If the user press and hold the button
for more than 2 seconds, the tester will be in auto range mode again.

Voltage measurement indication
⑪⑤⑥①
②③
④⑤
⑥

Current measurement indication

Disable Auto power off
Press and hold "ZERO" button and then the power on the meter.

⑦

Current Sensing Clamp
Barrier
Jaw-opening handle
Main function selector
LCD display
COM input terminal

⑦⑧⑨
⑩
⑪

Positive input terminal
Data hold & Manual range button
Zero button
Battery lid
Rear case

ACV Measurement

DC Current Measurement
Switch the main function selector torange.
Press ZERO button to enter the zero reading.
Before measuring current larger than 40A, adjust the scale to 400A range bypress the range button and press ZERO button again.
Open the clamp by pressing the jaw-opening handle and insert the cable to bemeasured into the jaw.
Close the clamp and get the reading from the LCD display.
Note:
Before this measurement, disconnect the test lead with the meter for safety.
In some occasion that the reading is hard to read, push the HOLD button andread the result later.

WARNINGDCV Measurement
WARNING

Maximum Input Voltage is 600V AC/DC. Do not attempt to take any
voltage measurement that may exceed to avoid Electrical shock hazard
and/or damage to this instrument.

Maximum Input Voltage is 600V AC/DC. Do not attempt to take any
voltage measurement that may exceed to avoid Electrical shock hazard
and/or damage to this instrument.

Switch the main function selector torange.
Connect red test lead to “+” terminal and black one to the “ COM “ terminal.
Measure the voltage by touch the test lead tips to the test circuit where thevalue of voltage is needed.
Read the result from the LCD display.

Switch the main function selector torange.
Connect red test lead to “+” terminal and black one to the “ COM “ terminal.
Measure the voltage by touch the test lead tips to the test circuit where thevalue of voltage is needed.
Read the result from the LCD display.

MaintenanceBattery Changing

CORRECTINCORRECT

Resistance Measurement

Continuity Test

Switch the main function torange.
Connect red test lead to “+” terminal and black one to the “ COM ” terminal.
Connect tip of the test leads to the points where the value of the resistance isneeded.
Read the result from the LCD display.

Switch the main function torange.
Connect red test lead to “+” terminal and black one to the “ COM ” terminal.
Connect tip of the test leads to the points where the conduction condition
needed.
If the resistance is under 40Ω, the beeper will sound continuously.

Note:
When take resistance value from a circuit system, make sure the power is cut
off and all capacitors need to be discharged.

WARNING
1. The following instructions are very important for safety. Read thismanual thoroughly to ensure correct maintenance.
2. Calibrate and inspect the meter at least once a year to ensure safety
and maintain its accuracy.
1. Maintenance and Inspection
1) Appearance: Is the meter not damaged due to falling or other cause?
2) Test leads:• Are the core wires not exposed from the test leads?
• Is the plug when inserted to the input terminal not loose?
If any of the above problems exists, stop using the meter and request forrepair.

BeeperWARNINGTo prevent electrical hazard or shock, turn off clamp meter and disconnect
test leads before removing battery lid.
Never uses the meter before the battery lid is closed.
1. When the battery voltage drop below proper operation range thewill appear on the LCD display and the battery need to changed.

symbol

2. Before changing the battery, switch the main dial to “OFF ”and disconnect
test leads. Open the battery lid by a screwdriver.
3. Replace the old batteries with two LR03 or AAA size batteries.
Close the battery lid and fasten the screw.

2. Inspection
Inspect the meter at least once a year.
3. Storage

CAUTION
1. The panel and case are not resistant to volatile solvent and must notbe cleaned with thinner or alcohol.
2. The panel and case are not resistant to heat. Do not place the meternear heat-generating devices.
3. Do not store the meter in a place where it may be subjected tovibration or where it may fall.
4. Do not store the meter in places under direct sunlight, or hot, cold or
humid places or places where condensation is anticipated.
5. If the meter will not be used for a long time, remove the batteries.

Short circuit

Open circuit

4. Battery when the meter is shipped:
A battery for monitoring has been installed prior to shipment from thefactory. It may be discharged before the expiration of the described batterylife.
*The battery for monitoring is a battery used to check the functions andperformance of the product.

DRAWING No. DCM400AD 06-1101 2040 6011