Why calibration is required in analog multimeter?

Are you using an Analog multimeter and are confused Why calibration is required in an analog multimeter?? Congrats you are in the right place because in this article. After reading so many articles on this topic I was not satisfied. So, I have decided to write in detail on the importance of calibration.

Before we start first of all let me answer the most frequent question

What is Multimeter?

A multimeter is a tool for measuring electrical quantities like resistance, voltage, and current. All these meters (ohmmeter, voltmeter, and ammeter) that measures those quantities are combined to a single meter is known as multimeters.

What is Analog Multimeter?

Analog multimeters work on the principle of moving coil meters. These meters use the deflection of an indicator needle to indicate the level of the measurement on an analog display.

Parts of Analog Multimeter

Multimeter Scale
Pointer
Selector knob
Test Probe
Zero Ohm adjuster

These meters we mostly used in the 1970s before the arrival of a digital multimeter. It is difficult for a newbie or layman to use an analog multimeter. Also, the chances of human errors are more in an analog multimeter as compared to a digital multimeter.

Despite all this, most professionals are still using meters with analog displays because they give very good indications on approximately very small values. Also, the cost of the test meter is very small as compared to the digital meter.

Why calibration is required in an analog multimeter?

Calibration is very important for test multimeters because

Analog multimeters have adjustable resistors called trimmer resistors that are used to compensate for different conditions. Electrical and electronic properties can be changed over repeated use of the multimeter with an analog display. Different factors like resistors, meter sensitivity, and battery voltage can affect the accuracy of the multimeter.

After reading this article “calibration in analog multimeters” you will be able to know the importance of calibration in multimeters. We have tried to cover each aspect of the multimeter and will look for more and try to add those in the next update. Do you calibrate your analog meter? Let us know in the comments section below.

Frequently Asked Questions

Do you want to know more about Why calibration is required in analog multimeter?. Read the questions below

How is an analog multimeter calibrated?

To calibrate the analog multimeter follow these steps

Insert the probe in meter.
Rotate the multimeter knob to Ohm setting.
In ohm setting, rotate knob further to multiplier x1.
Now, connect the both probe with each other or short circuit them.
The pointer must show zero scale.
If its not showing zero. we need to calibrate it.
Now, Locate the zero ohm adjuster, which is located on right side of meter near screen.
Rotate the zero ohm meter adjuster until the pointer show zero scale.
Now, your analog multimeter is ready to use.