Product Details

Mining Stray Current Tester Factory Direct features:

Wide measurement range, with a total of twenty ranges, can measure AC/DC stray voltage and stray current separately, no power supply needed, safe and reliable. Suitable for testing current and voltage generated by steel rails, water pipes, cables, etc. in coal mines, preventing electric detonator premature explosion and other combustion and explosion accidents caused by stray current discharge, reducing fire sources in mines to the lowest limit.

Usage methods and precautions:

 1. Before measurement, screw the test rod wires onto 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 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 50-100M, or temporarily determine test points as needed. Set the switch to the appropriate range, and the meter reading, after conversion, gives the corresponding current value.

 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. If no AC stray current is measured at a location, also test for DC stray current, and vice versa.

 5. When measuring stray voltage values, the ranges 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 magnitude of stray current is unknown, first set to the maximum range, then gradually decrease until an appropriate measuring range is found.

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

 8. When measuring DC stray current, if the meter pointer deflects in the reverse direction, swap the test leads.

 9. When the instrument is not in use, set it to the "Off" position.