Clamp Earth Resistance Tester is a major breakthrough in traditional grounding resistance measurement. It is widely used in the grounding resistance measurement of the power, telecommunications, meteorology, oilfield, construction and the industrial and electrical equipment. In the measurement of a grounding system with loop, does not require breaking down the grounding down lead, and no need the auxiliary electrode. It is safe, fast and simple in use.
In addition, the 1000Ω&30A type Clamp Grounding Resistance Tester is also able to measure the leakage current and the neutral current in the grounding system.
2.1. Series Model
Model | Jaw Size (mm) | Resistance Range (Ω) | Current Range (A) | Data Storage | Alarm Function |
1000Ω | 55×32 | 1000Ω | -- | 99 groups | Yes |
200Ω | 55×32 | 200Ω | -- | 99 groups | Yes |
1000Ω&30A | 55×32 | 1000Ω | 0--.30A | 99 groups | Yes |
Mode | Range | Resolution | Accuracy |
Resistance Range | 0.010Ω-0.099Ω | 0.001Ω | ±(1%+0.01Ω) |
0.10Ω-0.99Ω | 0.01Ω | ±(1%+0.01Ω) | |
1.0Ω-49.9Ω | 0.1Ω | ±(1%+0.1Ω) | |
50.0Ω-99.5Ω | 0.5Ω | ±(2%+0.5Ω) | |
100Ω-199Ω | 1Ω | ±(3%+1Ω) | |
200Ω-395Ω | 5Ω | ±(6%+5Ω) | |
400-590Ω | 10Ω | ±(10%+10Ω) | |
600Ω-1000Ω | 20Ω | ±(20%+20Ω) | |
Current Range | 0.00mA-9.95mA | 0.05mA | ±(2.5%+1mA) |
10.0mA-99.0mA | 0.1mA | ±(2.5%+5mA) | |
100mA -299mA | 1mA | ±(2.5%+10mA) | |
0.30A-2.99A | 0.01A | ±(2.5%+0.1A) | |
3.0A-9.9A | 0.1 A | ±(2.5%+0.3A) | |
10.0A-19.9A | 0.1 A | ±(2.5%+0.5A) | |
20.0A-30.0A | 0.1 A | ±(3%+1A) |
2.3. Technical Specifications
Power Source: 6VDC (4pcs 5# alkaline battery)
Working Temperature: -10 ° -55 ° C
Relative Humidity: 10%-90%
LCD: 4-digital LCD, 47mm (L) × 28.5mm (W)
Meter Size: 275mm (L); 85mm (W); 56mm (H)
Meter Weight (including batteries): 1130g
Protection Level: Double insulation
Structural Feature: Clamp and jaw type
Range Shift: Automatic
External Magnetic Field: <40A/m
External Electric Field: <1V/m
Single Measuring Time: 0.5 second
Measurement Resistance Frequency: >1KHz
Maximum Resistance Measurement Resolution: 0.001 Ω
Resistance Measurement Range: 0.01-1000 Ω
Current Measuring Range: 0-30A(1000Ω&30A type)*
Measured Current Frequency: 50/60Hz
Storable Measurement Data: 99 groups
Setting Range of Resistance Alarm Critical Value: 1-199 Ω
Setting Range of Current Alarm Critical Value:1-499mA(1000Ω&30A type)*
Note: with "*" item is limited to 1000Ω&30A type
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