I. Introduction
Clamp ground resistance tester, also known as loop resistance tester, is used to test ground resistance. This instrument uses a new black luxury screen design, the resistance current is displayed on the same screen, and it also has functions such as data storage, data review, alarm, and automatic shutdown.
The clamp ground resistance tester is controlled by a microprocessor and can accurately detect ground resistance. It uses fast filtering techniques to minimize interference. Simultaneous data storage and data upload functions.
II.Range and Accuracy
Resistance:
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 ±（1.5%＋0.5Ω）
100Ω-199Ω 1Ω ±（2%＋1Ω）
200Ω-395Ω 5Ω ±（5%＋5Ω）
400-590Ω 10Ω ±（10%＋10Ω）
600Ω-880Ω 20Ω ±（20%＋20Ω）
900Ω-1200Ω 30Ω ±（25%＋30Ω）
Current:
0.00mA -9.95mA 0.01mA ±（2.5%＋1mA）
10.0mA -99.0mA 0.1mA ±（2.5%＋5mA）
100mA -300mA 1mA ±（2.5%＋10mA）
0.30A-2.99A 0.01A ±（2.5%＋0.1A）
3.0A-9.9A 0.1A ±（2.5%＋0.3A）
10.0A-20.0A 0.1 A ±（2.5%＋0.5A）
III.Technical Specifications
Function: Ground resistance test, loop resistance test, leakage current test
Ambient Temperature and Humidity: 23℃±5℃, below 75%rh
Power Supply: DC 6V (4 AA dry batteries)
Measurement Method: mutual inductance
Resistor Resolution: 0.001Ω
Current resolution: 0.01mA
Ground voltage measurement function: None
Display Mode: 4-digit LCD display, black screen design
Measure Time: 2 times/sec
Alarm Function: When the measured value exceeds the alarm setting value, an alarm prompt will be issued
Battery Voltage: Real-time display of battery power, reminding to charge in time when the battery voltage is low
Automatic shut-down: Automatic shutdown after 5 minutes of startup
Power consumption: 50mA Max
Insulation resistance: Above 20MΩ (500V between circuit and case)
Pressure resistance: AC 3700V/rms (between circuit and case)
External Magnetic Field:＜40A/m
External Electric Field: ＜1V/m
Suitable for safety regulations IEC61010-1 (CAT III 300V, CAT IV 150V, pollution degree 2);
IEC61010-031;
IEC61557-1 (grounding resistance);