연락처

텍트로닉스 담당자와 실시간 상담 6:00am-4:30pm PST에 이용 가능

전화

전화 문의

9:00am-6:00PM KST에 이용 가능

다운로드

매뉴얼, 데이터 시트, 소프트웨어 등을 다운로드할 수 있습니다.

다운로드 유형
모델 또는 키워드

피드백

# How to measure Temperature Coefficient of Resistance (TCR)?

### 질문:

How to measure Temperature Coefficient of Resistance (TCR)?

### 답변:

The Temperature Coefficient of Resistance, or TCR, is a measurement of a resistor's change in resistance per change in temperature. It is typically measured in ppm/°C, that is, parts-per-million change in ohms per change of 1 degree centigrade. Common values might be 5 or 10 ppm/°C, while precision resistors might have values of <0.1ppm/°C. Because it a measure of change per external factor, TCR is a measurement of resistance linearity.

This measurement is typically done in a calibration lab with a precision temperature chamber and a DMM. For the resistance measurement, the important specification is NOT the overall accuracy of the instrument, somewhat confusingly. Instead, the important specification is ADC linearity. This is because the measurement is most interested in determining the change of a value rather than measuring the value exactly.

Linearity is an uncommon spec and is often only given in the full specifications document of a DMM. It is commonly given in ppm of range, or sometimes in % of range. Generally a single ADC will have the same linearity on every range, but check your instrument for specifics.

For TCR, you want your DMM's linearity to be more precise than the TCR you're attempting to measure. For example, the Keithley 2002 8.5 Digit Multimeter has a specified ADC linearity of <0.1ppm of range typical, <0.2ppm maximum. This meter could reliably measure TCR of >0.2ppm/°C, assuming the paired temperature chamber has an acceptable accuracy.

이 FAQ는 다음에 적용 됩니다:

제품:

FAQ ID 783033

모든 FAQ 보기 »