Megger DCM300E Data sheet

DCM300E

Earth Leakage Clampmeter

DESCRIPTION

The DCM300E is designed mainly to check earth leakage
currents. However, the upper range will measure currents
of up to 300 A a.c. making it a totally versatile instrument
capable of taking most current measurements.

The instrument has four ranges; 30 mA, 300 mA, 30 A and
300 A with a minimum resolution of 0,01 mA on the
30 mA range.

For those hard to read measurements, where there are
problems of accessibility or poor lighting, a data hold fea­ture has been incorporated, to aid measurement.

To save battery life when not in use the instrument has an
automatic power off feature and will turn itself off if it
hasn’t taken any readings over a 10 minute period. This
totally new clampmeter development ensures that the
latest safety design standards EN61010-2-32 and EMC
requirements are met. Safety is enhanced with the
incorporation of a tactile barrier. Extra insulation has been
used around the jaw specifically to reduce the possibility
of causing a short circuit between live conductors, as well
as protecting the operator from accidentally getting an
electric shock.

Simply Clamp on

With existing installations especially, by far the simplest
and easiest method of checking an installation is with a
clamp-on current meter. The clampmeter can be used
to locate the fault within the circuit without it being
necessary to disassemble the wiring.

APPLICATION

A typical application for the clamp-meter would be the
measurement of earth leakage current in a circuit where
the RCD keeps tripping out. The measured result will
quickly identify whether the earth leakage current present
is excessive causing the RCD to trip, or that the RCD itself
is faulty. Standing earth leakage can be the result of
various undetected faults in the installation such as cable
insulation deterioration, cable damage or the entry of
moisture into areas where there are exposed terminals or
fittings.

The instrument is pocket sized, light weight, rugged and
easy to use, making it an ideal choice for the electrical
industry.

FEATURES

■ 0,01 mA resolution for measuring earth leakage currents

■ 300 A range for standard current measurements

■ Analogue Bargraph Display for trending

■ Handguard designed for operator safety

■ Pocket sized and lightweight

■ 0,01 mA resolution

■ EMC & EN61010-1 compliant

■ 30 mA, 300 mA, 30 A & 300 A range

■ 40 mm jaw size

■ Analogue Bargraph & Digital Display

DCM300E

Earth Leakage Clampmeter

DCM300E

Earth Leakage Clampmeter

ORDERING INFORMATION

Item Order Code

Earth Leakage Clampmeter DCM300E
2 Batteries (2 x LR44)
Carrying Case
Instruction Manual 6172-172

SPECIFICATIONS

Measuring Method: Dual integration mode
Measuring Function: Leakage current and load

current
Display: 3,5 digit L.C.D.; max. reading of

3200

Range: 0-30 mA/300 mA/30 A/300 A (50/60Hz)
Ranging: 2 manual ranges
Accuracy specified at

operating temperature: 23°C ± 5°C, 80% RH max.

Range Min. Resolution Accuracy

30/300 mA 0,01/0,1 mA ±1,2% rdg ±5 dgt

0-200 A: ±1,2% rdg ±5 dgt

30/300 A 0,01/0,1 A 200-250 A: ±3,0% rdg ±5 dgt

250-300 A: ±5,0% rdg ±5 dgt

Jaw Opening Capability: 40 mm
Over Range Indication: “OL” mark on L.C.D.
Maximum Indication: 3200
Low Battery Indication: 2,5 V - 2,7 V; “+-” mark on L.C.D.
Data Hold Indication: “DH” mark on L.C.D.
Sampling Time: Approx. 2 times/sec.

(digital display)
Approx. 12 times/sec.
(bargraph display)

Auto Power Off: The meter is set to power off

mode approx. 10 minutes after the
power switch on

Limitation of Circuit Voltage: Less than a.c. 600 V
Withstanding Voltage: a.c. 3700 V/1 minute max.

(between the core of CT and the
unit housing)

Operating Temperature: 0 – 40 °C <80% RH

(non-condensing)

Storage Temperature: -10 – 60 °C <70% RH

(non-condensing)

Power Supply: 2 x 1,5 V button cells LR44

or SR 44

Power Consumption: Approx. 5 mW
Battery Life: Approx. 50 hrs. (LR44)
Size: 64 (W) x 176 (H) x 23 (D) mm

2,5 (W) x 7 (H) x ,9 (D) inches
approx.

Weight: Approx. 125 g (1⁄4 lb. approx.)

Safety

EN61010-1 and EN61010-2-032 300 V phase to earth and 500 V
phase to phase CAT III or 600 V CAT II double insulated

EMC

In accordance with IEC61326 including amendment No.1.

UK

Archcliffe Road Dover
CT17 9EN England
T [phone]
F [phone]

UNITED STATES

4271 Bronze Way
Dallas TX 75237-1088 USA
T 800 723 2861 (USA only)
T [phone]
F [phone]

OTHER TECHNICAL SALES OFFICES

Norristown USA, Toronto CANADA,
Mumbai INDIA, Trappes FRANCE,
Sydney AUSTRALIA, Madrid SPAIN
and the Kingdom of BAHRAIN.

Registered to ISO 9001:2000 Reg no. Q 09290

Registered to ISO 14001 Reg no. EMS 61597

DCM300_E_DS_en_V10

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