Megger DCM305E User Manual

DCM305E

Earth Leakage Clampmeter

User manual

99 Washington Street
Melrose, MA 02176

Phone [phone]
Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

G Read First
G 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.

2

CAT IV

Measurement category IV: Equipment connected between the origin of the

CAT III

Measurement category III: Equipment connected between the consumer

CAT II

Measurement category II: Equipment connected between the electrical

low-voltage mains supply outside the building
and the consumer unit.

unit and the electrical outlets.

outlets and the user’s equipment.

Symbols as marked on the instrument and
instruction card

F
G
t

g
a
c

Risk of electric shock

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

G 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.

3

Power Off / On

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

Auto Power Off Enable / Disable

4

Auto Hold Enable / Disable

In the AUTOHOLD 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 “AUTOHOLD” will be displayed.

Subsequently if the measured value changes by ±10 counts, the instrument
will beep; “AUTOHOLD” will disappear and the instrument will revert to
displaying the new readings until the next AUTOHOLD conditions are met.

Note: When the AUTOHOLD 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

Test Equipment Depot - 800.517.8431

99 Washington Street, Melrose, MA 02176

TestEquipmentDepot.com