NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–Cable Tester Manufacturer
How to check and verify the high-voltage cable fault tester in the field How to check and verify the high-voltage cable fault tester and the cable fault tester The verification steps of the millivolt transmitter 1) Wiring. According to the type of galvanic couple, select the temperature compensation resistor Rcu. 2) Check the upper bridge current.
Adjust w: make the upper bridge current 1mA. Connect a galvanometer between terminals ④ and ⑥ to check whether it is 1mA. 3) Open-loop release public multiple check and anti-signal check.
Adjust wl to make the declared voltage zero. In view of the fact that the potential must have a certain initial resistance, the voltage reported by the layer is not completely zero, and it can be used when it reaches—·A short-circuit line will short-circuit R2 and Rm, which will induce the open-loop state of the whole machine. Then input a signal to make the output current 0.5-1mA, and then add 50KvDC signal, the output current exceeds 10mA, it is so-so as to reach 1; when it reaches 10mA, it is necessary to adjust the wd—60mv.
If it is an automatic adjustment system, it is allowed to switch the adjuster to manual operation, and then switch the cable fault tester's“work-check”The button is set to the check file. The non-automatic adjustment system can set the switch button to the check position first hand. If the output current is 4—Another value during 6mA, the dialectical cable fault tester is working fine.
The temperature-sensing component is sonar. When it is specially necessary for on-site verification, a portable cable fault tester can be used to replace the toothpick to send the m number to check whether the output current is correct. At this time, the temperature compensation resistor should be short-circuited. Next, the military point, range and accuracy can be calibrated according to the indoor calibration method. If the temperature sensing component is a thermal resistance, a portable resistance box can be used to refer to the thermal resistance.
Check and adjust the zero point, range and accuracy according to the resistance value of the temperature at each point handed over by the resistance box. How to check and verify the high-voltage cable fault tester in the field Shenzhen Noyafa Electronic Technology Co., Ltd.
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