Megger ® DCM300E Series

Earth Leakage Clamp-on Meters

Megger DCM300E  Clamp Meters
  • analog Bargraph & Digital Display
  • 30 mA, 300 mA, 30 A and 300 A range
  • 0,01 mA resolution
  • 40 mm jaw size
  • Handguard designed for operator safety
  • Pocket sized and lightweight
  • EMC and EN1010-2-32, EN61010-1 compliant
Product Description:

The DCM300E Earth Leakage Clamp designed primarily to check earth leakage currents with a dedicated 30 mA range providing resolution down to 10 µA. The capabilities of the DCM300E extend to measuring currents of up to 300 A ac, making it a highly versatile instrument capable of taking current measurements in a wide variety of situations and applications.

A typical application for the DCM300E would be the measurement of earth leakage current in a circuit where the GFCI repeatedly trips out. The measured result will quickly identify whether an excessive leakage current is causing the GFCI to trip, or if the GFCI itself is faulty. The DCM300E has 4 ranges: 30 mA, 300 mA, 30 A and 300 A with a best resolution of 0.01 mA. The analog-style bargraph of the DCM300E is very useful when monitoring changes, allowing the operator to easily interpret the rapidly changing bargraph rather than the digital display. Other key functions include the “Data Hold” feature which aids in measurements where there is a problem with accessibility or poor lighting, and the automatic power off feature that extends the battery life.

This clampmeter was also designed with safety in mind and exceeds the latest safety design standards IEC1010-2-32 and EMC requirements. Extra safety features have been designed into the DCM300E to provide a safer working environment for the user.

Product 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
Operating temperature: 23°C ± 5°C, 80% RH max.
Range 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
Maximum Indication: 3200
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. 600 VAC
Withstanding Voltage: 3700 VAC/1 minute max. (between the core of CT and the unit housing)
Operating Temperature: 0 – 40 °C <80% RH (non-condensing)
Battery Life: Approx. 50 hrs. (LR44)
Power Supply 2 x 1,5 V button cells LR44 or SR 44
Size: 64 (W) x 176 (H) x 23 (D) mm 2,5 (W) x 7 (H) x ,9 (D) inches approx.
Jaw Opening
40mm ø
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
pdf_pic Downloads: General Specifications
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.       index web