Product Details

FZY-3 Mining Stray Current Tester Technical Parameters:

Measurement Range Current Range 0-50mA-250mA -1A-5A-10A

Voltage Range 0-0.2V-1V -4V-20V-40V

Measurement Accuracy AC ±5%

DC ±2.5%

Usage Methods and Precautions

1. Before measurement, screw the test rod wires into the two binding posts respectively, and adjust the meter pointer to the zero scale line.

2. Place the test rods connected to the binding posts on the two points to be measured (e.g., rails, water pipes, cable sheaths, coal, ground, etc.). The two test points should be on different conductors, with a distance of about 2 meters. Normally, measure every 50-100 meters, or determine test points temporarily as needed. Set the selector switch to the appropriate range, and the meter reading will give the corresponding current value after conversion.

3. During measurement, ensure good contact between the hard alloy tip of the measuring probe and the object under test. The instrument should be placed horizontally to ensure accurate readings.

4. When no AC stray current is detected at a location, also test for DC stray current, and vice versa.

5. When measuring stray voltage values, the ranges correspond as follows: 50mA corresponds to 0.2V, 250mA to 1V, 1A to 4V, 5A to 20V, 10A to 40V. (i.e., current value multiplied by 4 gives the voltage value)

6. When the magnitude of stray current is unknown, first set to the maximum range, then gradually decrease to the appropriate measuring range.

7. When the measured current exceeds 5A, only short-time measurements should be taken. When the measured current exceeds 10A, the instrument should only be used for instantaneous measurements to avoid burning out components and the meter due to high current.