Precautions for Resistance Measurement with a Multimeter
There are numerous types of components used in industrial applications, each with specific operating‑requirements. As a commonly‑used industrial measuring instrument, a multimeter also requires proper handling.
Key Points for Measuring Resistance with a Multimeter
Multimeters fall into two categories: traditional analog multimeters and digital multimeters. The traditional analog multimeter adopts pointer electromagnetic deflection. It requires mechanical zero‑adjustment before every use. Its operation is cumbersome, and readings are subjective and less accurate, so it is rarely used nowadays.
Digital multimeters directly display numerical readings without scale observation, delivering relatively accurate results, and are the mainstream type currently in use.
Precautions for Measuring Resistance with a Multimeter
① Perform mechanical zero‑adjustment before use. With no measured quantity applied, adjust the multimeter pointer to the zero‑voltage or zero‑current position.
② During measurement, do not touch the metal part of the test‑leads. This ensures both measurement accuracy and personal safety.
③ Do not shift the selector switch while taking measurements. This rule is especially critical for high‑voltage or high‑current measurements; otherwise the multimeter may be damaged. If gear switching is necessary, disconnect the test‑leads first, change the range, and then resume measurement.
④ Place the multimeter horizontally during operation to avoid measurement errors. Meanwhile, keep the instrument away from external magnetic‑field interference.
⑤ After finishing measurement, set the selector switch to the maximum AC‑voltage range. If the multimeter will remain unused for a long period, remove its internal battery to prevent battery corrosion from damaging internal components.
A multimeter is a multi‑function, multi‑range measuring instrument. It can measure resistance as well as DC voltage. As an important industrial measuring tool, understanding these precautions helps the instrument deliver optimal performance.
