Measures true RMS ground leakage current from 0.5 mA rms to 35 A rms.Measures ground resistance from 0.05 Ω to 1500 Ω. Downloads results via Bluetooth into Megger PowerDB Software.
The Megger DET24C induces a test current into earth systems and measures ground resistance in multi-ground installations without the need to disconnect the ground. The Megger earth resistance clamp meter is a useful addition to the more traditional methods of earth resistance measurement that may require disconnection or additional stakes and can be used to measure ground resistance in multiple loop installations without disconnecting the earth. This technique offers fast earth testing in total safety with the added convenience of having a single point of measurement to read earth resistance. This Megger earth clamp tester also provides a True RMS current measurement facility up to 35 Amps, allowing measurement of earth currents and giving an indication of potential measurement problems and a useful overview of the general earth system dynamics.
The new Megger DET24C has been designed with flat core ends that ensure measurement integrity and offer improved reliability and long term accuracy. They are easy to clean and eliminate the risk of easily bent interlocking teeth often found in earth resistance clamp meters. A built-in filter function offers increased noise immunity. The elliptical shaped clamp design provides greater access to cables and earth straps particularly in confined locations. The clamp head accommodates cables up to 37mm in diameter and flat earth tapes that are up to 50mm wide. Making this earth resistance clamp tester ideal for use in power stations, substations and towers. The DET 24C clamp tester is particularly suitable for measuring earth resistance in various installations such as buildings, pylons and RF transmitter sites. It can also be used for the inspection and verification of lightening protection systems.
The Megger DET24C has the added luxury of a USB download facility and is compatible with Megger Power DB Lite download manager software, which is supplied with the clamp, allowing further analysis and storage of data. The unit is rugged, compact and has configurable audible alarms. Additional features include a configurable auto shutdown, data storage, self-calibration on power up and a calibration loop - all contained in a sturdy carry case.
Megger DET24C Technical Specifications |
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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 | 1Ω | ±10% ±10Ω |
400 to 600Ω | 1Ω | ±10% ± 10Ω |
600 to 1200Ω | 10Ω | ±20% |
1200 to 1500Ω | 10Ω | ±35% |
Alarm Settings | ||
Alarm Type | Range | Resolution |
Threshold 1 | 1 to 1500Ω | 1Ω |
Threshold 2 | 1 to 1500Ω | 1Ω |
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 |
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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 EN 61010-2-032 |
Safety | CAT IV 600V Pollution degree 2 |
EMC | Class B compliant, IEC 61326, BSEN 61326 |
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