Megger DCM305E Earth Leakage Clamp Meter User Guide

DCM305E
Earth Leakage Clamp meter
User manual

DCM305E Earth Leakage Clamp Meter

Read First
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.
• Do not use the clamp meter if the instrument looks damaged
• Do not use the clamp meter if the tester 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 may be impaired.
• Ensure hands are kept behind the barrier/hand guard when making measurements.
• Special precautions are necessary when operating in situations where exposed live parts at dangerous voltages may be encountered. Personal protective equipment (not supplied with the instrument) should be used.
• Use caution with voltages above 30 V AC RMS, or 60 V DC. These voltages pose a shock hazard.

CAT IV
Measurement category IV:| Equipment connected between the origin of the low- voltage mains supply outside the building and the consumer unit.
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CAT III
Measurement category III:| Equipment is connected between the consumer unit and the electrical outlets.
CAT II
Measurement category II:| Equipment is connected between the electrical outlets and the user’s equipment.

Symbols as marked on the instrument and instruction card

| Risk of electric shock
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| See instruction card
| Equipment protected by double or reinforced insulation
| Low battery
| Earth
| AC measurement
| Conforms to EU directives
| Application around hazardous exposed live conductors is permitted
| Do not discard or throw away this product

  Caution
Take sufficient care not to apply shock, excessive vibration, or force to the jaw If the meter is used in the vicinity of equipment that generates large electromagnetic fields, the display may become unstable or the measurements may be subject to large errors.

Power Off / On

• The instrument displays battery capacity when powering up. Replace batteries when 0% is displayed.

Auto Power Off Enable / Disable

Auto Hold Enable / Disable

In the AUTO HOLD mode, if the measured value remains within ±10 counts over 10 measuring cycles the instrument will beep 3 times; the measured value will be held on the display, and “AUTO HOLD” will be displayed.
Subsequently if the measured value changes by ±10 counts, the instrument will beep; “AUTO HOLD” will disappear and the instrument will revert to displaying the new readings until the next AUTO HOLD conditions are met.
Note: When the AUTO HOLD activates, the displayed reading will be held for 3 seconds if the clamp jaws are removed from the conductor/s. During this time the HOLD key may be pressed to hold the reading indefinitely.
Auto Backlight

The Auto backlight on the display activates automatically when the instrument is used in very poor light locations

AC Current

Leakage Current Measurement
Recommended applications of instruments with respect to conductors.

Note: Measurements made on the earth conductor only will indicate current in the earth conductor but not the entire installation.

Single / 1 phase

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3 wire / 3 phase

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4 wire / 3 phase + neutral

Data Hold

Note: Data Hold beep guard
The internal sounder will beep continuously with the LCD display flashing in the Data Hold mode when the measured signal is 50 counts larger than the LCD reading.
Peak Hold
(forcing into the manual range mode)

Low Pass Filter
(forcing into the manual range mode)

• The cut-off frequency of the low pass filter is about 100 Hz with an attenuation characteristic of approximately -24 dB / octave.

Auto Range / Manual Range

Comparator

|
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• The instrument offers 3 limit values (0.25 mA, 0.5 mA, and 3.5 mA)
• The internal sounder will beep continuously with the LCD display flashing when the measured value exceeds the confirmed limit level.

Auto Hold

|
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Auto Power Off

Battery Replacement

Maintenance

Do not attempt to repair this meter. It contains no user-serviceable parts.
Repair or serving should only be performed by qualified personnel.
Cleaning
Periodically wipe the case with a dry cloth and detergent, do not use abrasives or solvents.

WEEE Directive

The crossed-out wheeled bin symbol on the instrument and on the batteries is a reminder not to dispose of them with general waste at the end of their life.
Megger is registered in the UK as a Producer of Electrical and Electronic equipment. The registration No is; WEE/DJ2235XR.
Users of Megger products in the UK may dispose of them at the end of their useful life by contacting B2B Compliance at www.b2bcompliance.org.uk or by telephone at 01691 676124.
Users of Megger products in other parts of the EU should contact their local Megger company or distributor.
Battery Disposal
Batteries in this product are classified as Portable Batteries under the Batteries Directive. Please contact Megger Ltd for instructions on the safe disposal of these batteries.
For disposal of batteries in other parts of the EU contact your local distributor.
Megger is registered in the UK as a producer of batteries.
The registration number is BPRN01235.
For Further information see www.megger.com

Specifications

General Specifications

other ranges.
Automatic power off time :| Approximately 20 minutes after power on without operations.
Low battery indicator :| is displayed. Replace the battery when the indicator appears on the display.
Power requirement :| 1.5 V x 2 batteries AAA / LR03
Battery type and the life :| Alkaline 60 hours.

Environmental Conditions
Indoor Use.

30°C ~ 40 °C (≤ 75% RH)
40°C ~ 50 °C (≤ 45% RH)
Storage temperature :| -20 to +60 °C, 0 to 80% RH (batteries not fitted).
Operating altitude :| 2000 m (6562 ft)
Conductor Size :| 40 mm diameter.
Shock vibration :| No shock, No vibration to the jaw tips.
Temperature coefficient :| 0.2 x (Specified accuracy) / °C,  < 18 °C, > 28 °C
EMC :| EN 61326-1
Overvoltage category :| IEC 61010-1 300 V CAT III

Accuracy is ±(% reading + number of digits) at 23 °C ± 5 °C < 80% RH.
AC Current

±(1% reading + 8 digits)
10 ~ 50A
±(2% reading + 10 digits)
50 ~ 100A
±(10% reading + 10 digits)
60 mA| 0.01 mA
600 mA| 0.1 mA
6:00 AM| 0.001 A
60 A| 0.01 mA
100 A| 0.1 A

* Digit rolling ±3 digits.

Frequency Response (61~400 Hz) :| 0A ~ 10A
±(2% reading + 11 digits)
10 ~ 50A
±(10% reading + 11 digits)
50 ~ 100A
±(35% reading + 11 digits)
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Position Error:| ±1% of reading.
Additional Accuracy by Crest Factor (C.F.):| Add 1.0% for C.F. 1.4 ~ 2.0.
Add 2.5% for C.F. 2.0 ~ 2.5.
Add 4.0% for C.F. 2.5 ~ 3.0.
Max. Crest Factor:| 1.6 for 6000 ~ 5000 digits
2.0 for 5000 ~ 3000 digits
3.0 for 3000 ~ 0 digits
Influence of external magnetic field of adjacent wires :| 0.04% typical value.

Low Pass Filter

±(2% reading + 8 digits)
10 ~ 50A
±(3% reading + 10 digits)
50 ~ 100A
±(12% reading + 10 digits)
60 mA| 0.01 mA
600 mA| 0.1 mA
6:00 AM| 0.001 A
60 A| 0.01 A
100 A| 0.1 mA

• Digit rolling ±3 digits.

Limited Warranty

This meter is warranted to the original purchaser against defects in material and workmanship for 1 year from the date of purchase. If the product is registered on the Megger website www.megger.com the warranty is extended to 3 years.
During this warranty period, the manufacturer will, at its option, replace or repair the defective unit, subject to verification of the defect or malfunction.
This warranty does not cover fuses, 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.

Megger Limited
Arncliffe Road
Dover
Kent
CT17 9EN
Tel: +44 (0) 1304 502 101
Fax: +44 (0) 1304 207 342
www.megger.com

Megger Limited
Arncliffe Road
Dover
Kent
CT17 9EN
ENGLAND
T +44 (0)1 304 502101
F +44 (0)1 304 207342| Megger GmbH
Obere Zeil 2 61440
Oberursel,
Germany
T. 06171-92987-0
F. 06171-92987-19
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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
4271 Bronze Way
Dallas TX 75237-1019 USA
T 800 723 2861 (the USA only)
T +1 214 333 3201
F +1 214 331 7399
USsales@megger.com

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

This instrument is manufactured in Taiwan.
The company reserves the right to change the specification or design without prior notice.

Megger is a registered trademark
DCM305E_UG_en-de-fr-es-nl_V05 05 2021
www.megger.com

Documents / Resources

| Megger DCM305E Earth Leakage Clamp Meter [pdf] User Guide
DCM305E, Earth Leakage Clamp Meter, DCM305E Earth Leakage Clamp Meter, Leakage Clamp Meter, Clamp Meter
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References

• B2B Compliance - The not-for-profit WEEE Compliance scheme
• Electrical test equipment | power station to plug | Megger
• B2B Compliance - The not-for-profit WEEE Compliance scheme
• Electrical test equipment | power station to plug | Megger

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