The DC resistance tester is the ideal device for the direct current resistance of the side transformer winding and the high power inductance device. In practical applications, there are also users to reflect the equipment in use will be in the process of failure. Here we explain in detail the DC resistance tester factory three problems and solutions.
1. DC resistance tester, start with the insurance fired.
There are two reasons: Winding Resistance Meter of 5A~10A,it is generally high voltage to cause transformer burn out. The instrument can not be normal in use;
The current is above 20A ,the resistance instrument appear this kind of circumstance, there is usually a problem of switching power supply.
Burn insurance occurs, only the timely replacement of transformers or switching power supply can be used normally. In the maintenance of equipment, it is necessary for professional engineers to disassemble the equipment. If the site does not have the maintenance conditions, it needs to be returned to the factory for maintenance.
2. Use DC resistance meter, but it can not measure the resistance value.
There are two kinds of reasons that can not be measured. 1. the switching power supply is broken, no current output; 2. the set value is beyond the equipment range, the program can not recognize the instructions.
If the power is damaged, replace the power supply. If it is over scale, restart the instrument and select the resistance or current within the range.
3. DC resistance meter in the testing process with blurred screen.
DC resistance meter with blurred screen may be bad connect inside the instrument .Shutdown to check whether the cable loose, reinforcement cable can solve the problem.
Another possibility is that the screen display is abnormal due to electromagnetic interference. If this is the reason, simply contact the manufacturer and add a filter capacitor.
In addition to the quality of the equipment itself, improper handling methods and storage methods can also cause equipment damage. In the process of using, can not contact the LED screen with high temperature, before testing, check whether the input interface clamp is normal or not. In addition, keeping the equipment dry and clean is also an effective way to extend the service life. In addition, it is best to correct the equipment once a year to ensure the accuracy and stability of the measurement.
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