Mine Stray Current Tester Price 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 lead connectors onto the two binding posts respectively, and adjust the meter pointer to the zero scale line.
2. Place the test leads 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 gear, 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 corresponding gears are: 50mA corresponds to 0.2V, 250mA to 1V, 1A to 4V, 5A to 20V, and 10A to 40V. (That is, the current value multiplied by 4 gives the voltage value.)
6. When the magnitude of stray current is unknown, first set to the maximum range gear, then gradually decrease until the appropriate measuring gear is found.
7. When the measured current exceeds 5A, the instrument should only be used for short-time measurements. When the measured current exceeds 10A, the instrument should only be used for instantaneous measurements, to avoid burning out components and the meter.
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.
Product Completeness
1. Main unit: one set
2. Test leads: one pair
3. Product manual: one copy
4. Product certificate of conformity: one copy
