Technical Parameters
1. Measurement range: 0~4mΩ (50A gear) 0~2mΩ (100A gear) 0~1.33mΩ (150A gear) 0~1mΩ (200A gear)
2. Test current: DC 50A, 100A, 150A, 200A fixed output
3. Measurement accuracy: ±(0.5% rd+2d)
4. Continuous working time: 5s~599s
5. Display mode: large screen Chinese LCD display
6. Communication method: RS232 serial port
7. Working power supply: AC220V±10% 50Hz
8. Total power: 1200W
Operating Procedure
1. Connect the wiring according to the four-terminal method.
2. Turn on the power.
3. Press the measurement key (if the current display A value is less than 100A, it can be corrected through the panel current fine-tuning).
4. After the measurement value is displayed, save the data.
5. After the measurement is completed, please turn off the power.
6. Please take care of the test clamps.
Instructions for Use
1. According to the four-wire measurement method, use the special test wire to connect the tested object to the instrument panel. Note that the voltage measurement wire should be connected inside the current output wire.
2. Connect the AC220V power supply (note: the third wire of the power input, i.e., the protective ground, must be connected to the earth), press the power switch, and the current meter and resistance meter will display "000" (one digit may be allowed to fluctuate before the value is stable).
3. Press the measurement switch, adjust the current output knob (clockwise) until the current meter displays "100.0", then read the number on the resistance meter, which is the resistance value of the tested object, and record it. (If "1" is displayed, it indicates that the measured circuit is over-range).
4. After the test, adjust the current output adjustment knob (counterclockwise) to the minimum, reset the measurement switch, and then turn off the power switch.
5. To repeat the test, simply reset the measurement switch, re-clamp the test clamps, and press the measurement switch again.
Fault Analysis
Precautions
| Fault Phenomenon | Cause Analysis | Troubleshooting Method | Remarks |
| No display after power-on | 1) Power not connected | Connect the power supply | When replacing the fuse, use the same type of fuse; do not replace it with other types. |
| 2) The instrument's 5A fuse is not installed properly or is open | Reinstall the fuse or replace the fuse | ||
| Output current cannot reach 200A | 1) The test line is too long, i.e., the wire cross-sectional area is too small | Replace with a wire of larger cross-sectional area | |
| No current output | 1) The device under test is open circuit | Check the device Eliminate the fault |
|
| 2) There is an open circuit fault in the test loop | Check the test loop and eliminate the open circuit fault |
1. Before turning on the power switch, the test button should be popped up (in non-test state), and the current adjustment knob should be turned counterclockwise to the "zero position".
2. The instrument should be placed in a dry, ventilated room without corrosive gases.
3. After the test, be sure to wait until all the power is discharged before removing the test wires and other devices.
Transportation and Storage
1. Transportation
When the equipment needs to be transported, it is recommended to use the company's instrument packaging wooden box and shock-absorbing items to avoid unnecessary damage during transportation and unnecessary losses to you.
When the equipment is transported without a wooden box, stacking is not allowed. When using the company's instrument packaging box, the maximum stacking layers allowed is two layers.
During transportation, the instrument panel should face upward.
2. Storage
The equipment should be placed in a dry, dust-free, ventilated room without corrosive gases. Without wooden box packaging, stacking is not allowed.
When the equipment is stored, the surface
