Is the temperature gauge of a mechanical multimeter smaller than that of a digital multimeter?

bigbat

Is the temperature gauge of a mechanical multimeter smaller than that of a digital multimeter? [Copy link]

Does a mechanical multimeter have a smaller temperature drift than a digital multimeter? I usually use the multimeters commonly seen in the market. Some colleagues said that the temperature drift of digital meters is large. So I want to ask if the temperature drift of mechanical meters is smaller, or is it because the grade of the meter I use is not good enough?

maychang

The temperature drift of a mechanical multimeter is not small.

The temperature drift of a digital multimeter depends on its design and materials. A digital multimeter with improper design and inferior materials will of course have a larger temperature drift, while a digital multimeter with good design and exquisite materials can have a very small temperature drift.

sint27

Anyway, almost no company uses mechanical multimeters now. If you think the error is large, you can buy a higher-end one, such as Fluke

bigbat

maychang published on 2021-8-31 09:37 The temperature drift of a mechanical multimeter is not small. The temperature drift of a digital multimeter depends on the design and materials of the meter. A digital meter with improper design and inferior materials will certainly have a higher temperature drift.

Does the mechanical multimeter also have a problem with the materials used, or is it unrelated to the materials?

maychang

bigbat posted on 2021-8-31 10:57 Does the mechanical multimeter also have a problem with the materials used, or is it unrelated to the materials?

"Does the mechanical multimeter also have a material problem, or is it unrelated to the material?"

Of course it depends on the materials used.

There are many resistors in a mechanical meter (pointer multimeter), and these resistors all have certain temperature coefficients. The temperature coefficient of each resistor directly determines the temperature drift of the entire meter.

bigbat

maychang posted on 2021-8-31 11:28 "Does the mechanical multimeter also have material problems, or is it unrelated to the materials?" Of course it is related to the materials. Mechanical meter (pointer multimeter) ...

Can it be understood that the temperature drift of a mechanical watch only depends on the material properties and has little to do with the measurement principle?

Digital meters depend mainly on design, and material properties secondarily. My understanding is that semiconductors have large temperature drifts. A good design will produce better results.

maychang

bigbat posted on 2021-8-31 11:52 Can it be understood that the temperature drift of a mechanical watch depends only on the material properties and has little to do with the measurement principle. The digital watch mainly depends on the design and material properties...

If you open a digital meter, you will see that there are many resistors inside. The temperature coefficients of these resistors also determine the temperature drift of the entire meter.

There must be AD conversion in a digital meter, and the AD conversion in a digital meter is usually double-integral, which cleverly avoids the influence of temperature. This can be called "good design".

w494143467

It seems that the more expensive the multimeter, the better!