CHD1200 Clamp Ground Resistance Tester Technical Summary

Measuring principle of explosion-proof clamp ground resistance tester:

1.CHD1200 clamp ground resistance tester resistance measurement principle

The basic principle of the clamp ground resistance meter to measure the ground resistance is to measure the loop resistance. The jaw part of the clamp meter is composed of a voltage coil and a current coil. The voltage coil provides the excitation signal and induces a potential E on the circuit under test. Under the action of the potential E, a current I will be generated in the circuit under test. The clamp meter measures E and I, and the measured resistance R can be obtained by the following formula.

2. Principle of current measurement of CHD1200 clamp ground resistance tester

The basic principle of the current measurement by the clamp ground resistance meter is the same as that of the current transformer. The explosion-proof clamp ground resistance tester measures the AC current I of the wire, generates an inductive current I1 through the current loop and current coil of the jaw, and measures the I1 by the clamp meter.

Power: 6VDC (4 AA alkaline dry batteries)

Working temperature: -10 ℃ -55 ℃

Relative humidity: 10% -90%

LCD display: 4-digit LCD digital display, length and width 47 × 28.5mm

Jaw opening size: 32mm

Clamp meter quality (including battery): long jaw 1160g; round jaw 1120g

Clamp meter size: long jaw length 285mm, width 85mm, thickness 56mm

Round jaw length 260mm, width 90mm, thickness 66mm

Protection level: double insulation

Structural features: jaw way