Megger DCM320 Digital Clamp Meter User Guide

: June 5, 2024
: Megger

Megger DCM320 Digital Clamp Meter

Safety Information

To ensure safe operation and service of the Meter, follow these instructions.
Failure to observe warnings can result in severe injury or death.

Avoid working alone so assistance can be rendered.
To enhance safety, test leads should be disconnected from instrument when not in use.
Do not use test leads or the Clamp Meter if they look damaged.
Do not use the Meter if the Clamp Meter is not operating properly or if it is wet.
Use the Clamp Meter only as specified in the Instruction card or the protection provided by the Clamp Meter might be impaired.
Special precautions are necessary when operating in situations where exposed live parts at dangerous voltages may be encountered. Personal protective equipment (not supplied with this instrument) should be used.
To avoid false readings that could lead to electric shock and injury, replace the battery as soon as the low battery indicator ( ) appears.

Maintenance

Do not attempt to repair this Clamp Meter.
It contains no user-serviceable parts. Repair or serving should only be performed by qualified personal.

Cleaning

Periodically wipe the case with a dry cloth and detergent do not use abrasives or solvents.

Safety, Hazard and Warning symbols on the instrument

This paragraph details the various safety and hazard icons on the instrument’s outer case.

CAT IV – Measurement category IV: Equipment connected between the origin of the lowvoltage mains supply and distribution panel.

CAT III -Measurement category III: Equipment connected between the distribution panel and electrical outlets.

CAT II – Measurement category II: Equipment connected between the electrical outlets and user’s equipment.

CAT I – Measurement category I: The circuits are not connected to mains.

Measurement equipment may be safely connected to circuits at the marked rating or lower. The connection rating is that of the lowest rated component in the measurement circuit.

Operation

Power On / Off

AC V / DC V

Auto Power Off

The meter will automatically shut itself off after approximately 10 minutes after power on.

Resistance

Continuity

Data Hold

ACA

Battery Replacement

To avoid false readings that could lead to electric shock and injury, replace the battery as soon as the low battery indicator ( ) appears.

Specifications

Specification	Detail

General Specifications

LCD display digits| 3 1/2 digit large scale LCD readout.
Display count| 2000 counts
Measuring rate :| 1.5 times / sec
Over range display :| “OL” is displayed for “Ω” functions, shows the real value for “A” and “V” function.
Automatic power off time :| Approximately 10 minutes after power on.
Low battery indicator :| is displayed. Replace battery immediately
Power requirement :| 1.5 V AAA x 2 battery. Rechargeable batteries are not suitable for use with this instrument

Environmental Conditions Indoor Use.

Calibration :| One year calibration cycle.
Operating temperature :| 0 ºC ~ 30 ºC (≤80% RH)
30 ºC ~ 40 ºC (≤75% RH)
40 ºC ~ 50 ºC (≤45%RH)
Storage temperature :| -20 to +60 ºC, 0 to 80% RH (batteries not fitted).
Overvoltage category :| IEC 61010-1 600V CAT.III.
Operating altitude :| 2000 m (6562 ft)
Conductor Size :| 27 mm diameter.
Pollution degree :| 2
EMC :| EN 61326-1
Shock vibration :| Sinusoidal vibration per MIL-T- 28800E (5 ~ 55 Hz, 3 g maximum).
Drop Protection :| 1.2 m drop to hardwood on concrete floor.
Dimensions (W x H x D) :| 56 mm x 188 mm x 28mm
Weight :| 225 g including battery.
Accessories :| Battery (installed), Carrying case, Test lead and User manual.

Electrical Specifications

Accuracy is ± (% reading + number of digits) at 23 ºC ±5 ºC < 80%RH.
Temperature coefficient :| Add 0.2 x (Specified accuracy) / ºC, < 18 ºC, > 28 ºC .
DC / AC Volts| | Range DC| Accuracy| AC Accuracy
---|---|---
200.0 V| ±(1.0% + 2 dgt)| ±(1.5% + 5 dgt)
50 Hz ~ 500 Hz
600 V
Over voltage protection :| DC / AC 600 V
Input Impedance :| 10 MΩ // less than 100 pF.
CMRR / NMRR :| (Common Mode Rejection Ratio) (Normal Mode Rejection Ratio)
VAC :| CMRR > 60 dB at DC, 50 Hz / 60 Hz
VDC :| CMRR > 100 dB at DC, 50 Hz / 60 Hz
NMRR > 50 dB at DC, 50 Hz / 60 Hz
AC Conversion Type :| Average sensing rms indication.
AC Current| | Function| Range| Accuracy
---|---|---
A~ (50~60 Hz| 0.0 ~ 40.0 A| ±(1.9% + 10 dgt)
40.0 ~ 200.0 A| ±(1.9% + 5 dgt)
201 ~ 400 A| ±(1.9% + 5 dgt)
Overload protection :| 600 A rms
AC Conversion Type :| Average sensing rms indication.
Position Error :| ±1.0% of reading.
Resistance| | Range| Accuracy
---|---
200.0 Ω 3| ±(1.0% + 5 dgt) 2
2.000 KΩ 3| ±(0.7% + 2 dgt)
20.00 KΩ 3
200.0 KΩ 3
2.000 MΩ 3| ±(1.0% + 2 dgt)
20.00 MΩ| ±(1.9% + 5 dgt) *1
Overload protection :| 600V rms
Open circuit Voltage :| -1.3 V approx.

1 < 100 dgt rolling.
2 < 10 dgt rolling.
3 The maximum LCD reading is 1400 counts.
Continuity :| Internal beeper activates if the resistance of the circuit under test is less than 20 Ω. It will then turn off if the resistance is increased beyond 50 Ω. Response time is approximately 50 m sec.
Overload protection :| 600 V rms.

Limited Warranty

This Meter is warranted to the original purchaser against defects in material and workmanship for 1 year from the date of purchase. During this warranty period, manufacturer will, at its option, replace or repair the defective unit, subject to verification of the defect or malfunction.

This warranty does not cover , disposable batteries, or damage from abuse, neglect, accident, unauthorized repair, alteration, contamination, or abnormal conditions of operation or handling.

Any implied warranties arising out of the sale of this product, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited to the above. The manufacturer shall not be liable for loss of use of the instrument or other incidental or consequential damages, expenses, or economic loss, or for any claim or claims for such damage, expense or economic loss. Some states or countries laws vary, so the above limitations or exclusions may not apply to you.

Decommissioning

WEEE Directive

The crossed out wheeled bin symbol placed on Megger products is a reminder not to dispose of the product at the end of its life with general waste.
Megger is registered in the UK as a Producer of Electrical and Electronic Equipment. The Registration No is WEE/ HE0146QT.
For further information about disposal of the product consult your local Megger company or distributor or visit your local Megger website.

Battery disposal

The crossed out wheeled bin symbol placed on a battery is a reminder not to dispose of batteries with general waste when they reach the end of their usable life.
For disposal of batteries in other parts of the EU contact your local Megger branch or distributor.
Megger is registered in the UK as a producer of batteries (registration No.: BPRN00142).
For further information see www.megger.com

Manufacturing sites

Megger Limited
Archcliffe Road Dover Kent CT17 9EN ENGLAND
T. +44 (0)1 304 502101
F. +44 (0)1 304 207342

Megger GmbH
Weststraße 59 52074 Aachen
T. +49 (0) 241 91380 500
E. info@megger.de

Megger USA – Valley Forge
Valley Forge Corporate Center 2621 Van Buren Avenue Norristown Pennsylvania, 19403 USA
T. +1 610 676 8500
F. +1 610 676 8610

Megger USA – Dallas
4545 West Davis Street Dallas TX 75237 USA
T. 800 723 2861 (USA only)
T. +1 214 333 3201
F. +1 214 331 7399
E. USsales@megger.com

Megger AB
Rinkebyvägen 19, Box 724, SE-182 17 DANDERYD
T. +46 08 510 195 00
E. seinfo@megger.com

Megger USA – Fort Collins
4812 McMurry Avenue Suite 100 Fort Collins CO 80525 USA
T. +1 970 282 1200

The company reserves the right to change the specification or design without prior notice.
Megger is a registered trademark

DCM320_UG_en_V02 08 2021
© Megger Limited 2020

www.megger.com

Documents / Resources

| Megger DCM320 Digital Clamp Meter [pdf] User Guide
DCM320, Digital Clamp Meter, DCM320 Digital Clamp Meter
---|---
| Megger DCM320 Digital Clamp Meter [pdf] User Guide
DCM320, Digital Clamp Meter, DCM320 Digital Clamp Meter, Clamp Meter, Meter