How Often Should Calibration Be Done?

How often do I need to calibrate my multimeter?


If you do a mix of critical and non-critical measurements, annual calibration tends to strike the right balance between prudence and cost.


If you seldom do critical measurements and don’t expose your meter to an event, calibration at long frequencies can be cost-effective..

How often should gauges be calibrated?

In some industries, best practices call for gauge calibration at least once a year. Instruments used in pharmaceutical, biotechnology, medical, and food processes may need to be calibrated more often to ensure proper quality control of the product.

Where can I calibrate my multimeter?

How to Calibrate a Digital MultimeterSet the multimeter to the highest resistance range by turning the dial to the highest “ohm” setting.Touch the test probes of your digital multimeter together. … Press the calibration knob until the display reads “0” on the digital multimeter if you don’t see “0 ohms” initially.

How do I know if my multimeter is broken?

If it’s very low (close to 0 ohms), it’s still good. If it’s very high (open circuit), it’s blown. A 200 mA fuse should have a very fine wire visible inside the glass. If it’s completely clear, the wire is gone (blown).

What is the NIST standard for calibration?

NIST traceable calibration is an assurance program that certifies that a laboratory or manufacturer is fully equipped to calibrate equipment to the National Institute of Standards and Technology (NIST) standards and that any products offered by that manufacturer will match those NIST-maintained measurement standards.

What is calibration technique?

Calibration is the act of ensuring that a method or instrument used in measurement will produce accurate results. There are two common calibration procedures: using a working curve, and the standard-addition method. Both of these methods require one or more standards of known composition to calibrate the measurement.

What is the frequency of calibration?

Calibration frequency is determined by the factors affecting the measurement accuracy as the frequency of the instrument usage, environmental conditions of the surroundings (temperature, humidity and vibration etc.), required result accuracy etc. Calibration frequency should be increased when: 1.

How do I test if my multimeter is accurate?

Set your multimeter to the lowest setting for resistance (the word “ohms” or an “Ω” symbol can also denote resistance). Touch the red probe to the black probe. Check the display to make sure that it reads “0,” as there should not be any resistance between the two probes. Find a resistor of known value.

Can I calibrate my own multimeter?

To ensure accurate measurement results, a multimeter must be calibrated periodically. For companies, calibration of instruments is usual and even mandatory. For hobbyists, it is expensive. The calibration of a multimeter can even be more expensive than buying a new one.

Why is my multimeter not reading current?

If the multimeter doesn’t turn on or the display is dim you may have a weak or dead battery. … If your multimeter powers up but you aren’t getting accurate measurements you may have faulty test leads. Set your multimeter to read resistance and touch the test probe leads together. It should read zero ohms.

How do you determine calibration frequency?

When determining the frequency of calibration, consider factors that may affect measurement accuracy:How often the instrument is used.Environmental conditions (e.g. humidity, temperature, vibration) where the instrument is stored and used.The required uncertainty in measurement.More items…