DET24C Digital Earth Clamps – Megger

  • Elliptical clamp shape improves access to earth cables and straps up to 50 mm
  • Low maintenance flat jaw interface
  • Measures ground resistance from 0.05 Ohms to 1500 Ohms
  • Measures true RMS ground leakage current from 0.5 mA rms to 35 A rms
  • CAT IV 600 V safety rating
  • Backlit LCD display
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Resistance Measurements
Ground Resistance Range Resolution Intrinsic Certainty
0.05 to 0.99Ω 0.01Ω ±1.5% ± 0.05Ω
1.00 to 9.99Ω 0.01Ω ±1.5% ± 0.1Ω
10.0 to 99.9Ω 0.1Ω ±2% ± 0.5%
100.0 to 199.9Ω 0.1Ω ±5% ±1Ω
200 to 400Ω ±10% ±10Ω
400 to 600Ω ±10% ± 10Ω
600 to 1200Ω 10Ω ±20%
1200 to 1500Ω 10Ω ±35%
Alarm Settings
Alarm Type Range Resolution
Threshold 1 1 to 1500Ω
Threshold 2 1 to 1500Ω
Current Measurements (RMS)
Current Range Resolution Intrinsic Certainty
0.5mA to 0.99mA 0.01mA ±2% ± 0.05mA
1.00 to 9.99mA 0.01mA ±2% ± 0.05mA
10.0 to 99.9mA 0.1mA ±2% ± 0.1mA
100 to 999mA 1mA ±2% ± 1mA
1 to 9.99A 0.01A ±2% ± 0.01A
10 to 35A 0.1A ±2% ± 0.1A
True RMS readings up to a crest factor of 5.0 (peak current of 40A)
Accuracy guaranteed for 50Hz and 60Hz
Measurement over the range 16Hz to 400Hz
Maximum current is 100A RMS continuous and 200A RMS for 60s max at 50Hz and 60Hz
General Specs
Maximum Jaw Opening 39mm
Maximum Jaw Inner Dimensions 39mm x 55mm
Display Type 4 + 6 digit with backlight
Battery Type 4 x 1.5V IEC LR6/AA alkaline
Battery Life 24 hours continuous testing
Auto Power Down 300s (reset by jaw action or button press)
Datalogging 2000 records
Range Selection Automatic within each mode
Sample Time <1s
Hold Function Yes with visual indicator
Alarm Function Yes with visual indicator
Warning Buzzer Yes
Operating Temperature and Humidity -20 to 50°C, <85% RH
Storage Temperature and Humidity -40 to 60°C, <75% RH
Weight 985g
Instrument Dimensions 248 x 114mm x 49mm (L x W x H)
IP Rating IP30 with jaws closed
Performance IEC 61557-5
IEC 61557-13 Class 1
Safety EN 61010-2-032
Pollution degree 2
EMC Class B compliant, IEC 61326, BSEN 61326


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