What are the common faults and solutions of multi-function digital display meters?

As a precise electronic measuring instrument, multi-function digital display meters may encounter some common faults. Here are some common faults and solutions:

No display on the screen: This could be caused by low battery power or poor battery contact. The solution can be to try replacing the batteries or cleaning the battery contacts.

Display shows garbled text or flickering: This might be due to loose display connection cables or damaged display components. The solution can be to check if the connection cables are properly seated, or to replace the display components.

Inaccurate measurements: This can be caused by poor test lead connections, incorrect measurement range selection, or inaccurate instrument calibration. The solution can be to reconnect the test leads, select the appropriate measurement range, and perform a calibration operation.

Instrument non-responsive: This could be due to a faulty switch or internal circuit failure. The solution can be to check if the switch is functioning normally, or to send the instrument for repair.

Instrument leakage or overheating: This may indicate short-circuited or faulty internal components. The solution is to stop using the instrument immediately, unplug it from the power source, and send it for repair.

Automatic shutdown of the instrument: Some digital meters have an automatic shutdown feature that turns off the meter after prolonged inactivity. This is not a fault; simply turn the instrument on again.

In general, when a multi-function digital display meter malfunctions, first check if the fault is caused by improper operation or external factors, and try to resolve it. If the issue persists, it's best to send the instrument to a professional repair center for maintenance or service. Proper care and correct operation during daily use can effectively extend the instrument's lifespan.