◇ ◇
YD mine stray current tester to test underground rail, cable jacket, metal grids, such as stray currents. Prevention of stray currents exceeds the specified value, caused by an electric spark. To ensure mine safety.

• Measuring range •
Exchanges document: 0~100mA~500mA~1A~5A
DC: (+) 0~100mA~500mA~2.5A~10A~50A
Error: DC +2.5%
Exchange +5%

• Notes •
Insert line in the test line will be tested before the measurement hole, and plug the wiring plugged two holes in the control header pointer so that it indicates the zero line.
Will be connected with the terminals of the test stick into the two points measured (such as Rails, cable jacketing, coal, etc) will change the switch on the appropriate document, header indicates whether value is a value of stray current measured between two points, and pointer when turning right is positive, the left is negative.
When measuring the stray voltage, you can join in a two-column spread, this header indicates the voltage value, corresponding to the mA mV, a corresponding to v.
Stray current when an unknown size, maximum file should be placed quanta, and then gradually decreases, until the appropriate measurements, instruments should be positioned horizontally.
The current to be measured is greater than 5A, instruments suitable only for short-time measurement, when the measured current is greater than 10A, instantaneous measurements only.
Equipment when not in use should be placed in (off) position.

One Stray current Tester Using methods and points for attention
1, before the measurement, test wiring screw the two terminals, respectively, adjust table pointer to zero-tick.
2, will be connected with the terminals of the test stick into the two points measured (such as Rails, pipes, cable jacketing, coal, Earth, etc), two points should be on different conductors, measuring point distance of about 2 meters, normally once every 50-100M measured or determined according to the temporary test points. Place the switch in the appropriate document, the table indicates the value, converted from the current value.
3, when carbide tip of the measuring probe and the measured object contact is good, instruments should be positioned horizontally in order to ensure accurate readings.
4, when a measurement of stray current to AC, you should also test DC stray current, and vice versa.
5, when measuring the stray voltage, its stalls are: 50mA correspondence 0.2V, 250mA correspondence 1V, 1 a 4V, 5A 20V, 10A correspondence 40V. (That is, current voltage values as x 4)
6, when the unknown of stray current when placed quanta the largest block, and then gradually decrease until the appropriate measurements.
7, when the current to be measured is greater than 5A, instruments suitable only for short-time measurement, when the measured current is greater than 10A, the instrument should only make instantaneous measurements. Avoid large currents destroyed components and instruments.
8, when measuring the stray current in DC, such as reverse header pointer deflection, swap tables
9, the instrument when not in use should be placed in the ' closed ' position.

Two Stray current Tester Product packages
1, host
2, test probes a pair
3, the product specification
4, product certificate

Note: This instrument one year warranty, life-long maintenance