Product Details

Product Use:

FZY-3 Stray Current Tester is a portable rectifier instrument with high sensitivity and multi-range protection circuit.Its characteristics are: wide measurement range, with a total of twenty ranges, capable of measuring AC/DC stray voltage and stray current separately, no power supply needed, safe and reliable. It is suitable for testing the current and voltage generated by steel rails, water pipes, cables, etc. in coal mines, preventing early explosion and other combustion and explosion accidents caused by stray current discharge, reducing the fire source in the mine to the minimum.

FZY-3 Stray Current Tester Technical Parameters:

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

Voltage Gear 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., steel rail, water pipe, cable sheath, coal, ground, etc.). The two test points should be on different conductors, with a distance of about 2 meters. Normally, measure every 50-100M, or temporarily determine the test points as needed. Set the switch to the appropriate gear, and the meter reading, after conversion, gives the corresponding current value.

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

4. When no AC stray current is measured at one point, also test for DC stray current, and vice versa.

5. When measuring stray voltage values, the gears are: 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 stray current magnitude is unknown, first set to the maximum range, then gradually decrease until the appropriate measuring gear.

7. When the measured current exceeds 5A, the instrument should only be used for short-term measurement; when the measured current exceeds 10A, the instrument should only be used for instantaneous measurement. To avoid burning out components and the meter with large currents.