Milliohm resistance test requirements

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Milliohm resistance test requirements [Copy link]

Is there anyone familiar with resistance testing?

Is there any requirement for the constant current 1A standard for milliohm resistance testing (constant current drive four-wire method)?

dfwisdom

Can the current measured by milliohm resistors use 1A ampere level?

Keithley's Low Level Measurement Manual mentions the measurement method of milliohm resistance.

qwqwqw2088

The test requirements are basically determined by your own needs

Depends on the accuracy

A four-and-a-half-digit meter can barely measure a resistance of 0.01 ohms.

Milliohm resistance is generally measured by a milliohm meter, and the internal principle is four-wire measurement

呜呼哀哉

qwqwqw2088 posted on 2021-9-28 16:53 The test requirements are basically determined by your own needs. You need to look at a table with a precision of four and a half digits, which can barely measure 0.01 ohm resistance. Milliohm resistance is generally milliohm...

The four-wire system is clear, the problem is whether there is a national standard for the driving current. Now give 1A excitation, the DUT has no problem, but the internal reference resistor heats up, this is the problem.

I want to set the current, but I heard it must be 1A, but I don't know why.

qwqwqw2088

Alas, published on 2021-9-28 17:41 This four-wire system is clear, the problem is whether there is a national standard for the driving current. Now give 1A excitation, the DUT has no problem, the internal reference resistor...

Milliohm resistors from different manufacturers have different temperature drifts

Overcurrent is also different

Milliohm resistors, alloy resistors, precision resistors, including ordinary resistors, the parameters will give the temperature drift value

The national standard tests also measure temperature drift and power

qwqwqw2088

JBT6319-2010电阻器基本技术要求.pdf (25.1 MB, downloads: 20)

2021-9-29 07:45 上传

点击文件名下载附件

maychang

Alas, published on 2021-9-28 17:41 This four-wire system is clear, the problem is whether there is a national standard for the driving current. Now give 1A excitation, the DUT has no problem, the internal reference resistor...

"I want to set the current, but I heard it has to be 1A, but I can't come up with an explanation."

There is no such thing as "must be 1A".

呜呼哀哉

dfwisdom published on 2021-9-28 16:45 Can the current measured by milliohm resistors use 1A ampere level? The Keithley Low Level Measurement Manual mentions the measurement of milliohm resistors...

My friend, is there an electronic version of this information? Would you mind giving me a copy?

dfwisdom

Alas, published on 2023-3-16 11:49 Friend, is there an electronic version of this information? Would you mind giving me a copy?

Search on Baidu and you will find some

呜呼哀哉

dfwisdom posted on 2023-3-16 18:16 Search on Baidu, there are some online

I found it. It's in the forum. There are several versions of the Chinese electronic documents.