Usage
1. According to the debugging requirements, connect the current generator and the test object, and connect the power supply.
2. Select the position of the current transfer switch according to the current required by the test object. Since the current transformer does not allow open circuit, the current transfer switch can only be set to the "high" or "low" position, and cannot be placed in the middle position.
For equipment with higher power, adjust the short-circuit plate position through series and parallel connections to complete the high-current gear conversion.
3. Close the power supply, the green light will be on (if the green light is not on, turn the voltage regulator knob counterclockwise to zero until the green light is on), press the start button, the green light turns off and the red light turns on, rotate the voltage regulator handle clockwise to raise the current to the required value.
4. Turn the voltage regulator handle counterclockwise to zero, press the stop button, the red light turns off and the green light turns on, and the test ends.
Precautions
1. The single equipment is heavy; when moving for testing, pay attention to personal safety. The test work must be carried out by at least two people, one operating and one supervising to ensure safety. Test personnel should maintain a corresponding safe distance from the test object. Test personnel should wear protective gear and set up a warning area.
2. The shell must be grounded. Do not ignore the prevention of personal safety accidents due to low voltage. The instrument must be well grounded. During use, the current generator transformer and the operating console must be reliably grounded to ensure safety.
3. The wire from the secondary side of the current generator to the test object should not be too long, and the cross-sectional area should be sufficient (current density can be considered at 6-8A/mm). The contact surface should be cleaned (can be polished with fine sandpaper), otherwise the connection will heat up, and the current may not reach the rated value.
4. Before work, check that the power supply has sufficient capacity; otherwise, the power cord heating and voltage drop will affect normal operation.
5. There should be no flammable materials at the work site. For temperature rise tests, sufficient fire extinguishing equipment should be prepared.
6. For continuous (temperature rise) tests, someone should be on duty at the site. Regularly check the heating condition of the current source equipment, wires, and connections, and make records. Due to fluctuations in the grid voltage, pay attention to adjusting the TD to maintain the rated test current. During the test, once any abnormal situation is found, immediately cut off the air switch power supply, find out the cause, and then conduct the test again. After the test, the voltage regulator must be returned to zero, cut off the power supply via the air switch, cut off the working power, and then remove the test wiring to ensure safety.
7. Test work should comply with the relevant regulations of the electric power safety work regulations and formulate practical safety measures. The instrument is designed for short-term work, so it is not allowed to work under rated capacity for a long time, especially not allowed to operate exceeding the rated current to prevent overheating.
8. If the LCD screen does not display and the printer does not work, do not pat the panel, vibrate the body, or disassemble it yourself; contact the manufacturer for maintenance.
