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图国巨国巨电阻规格书-【新闻】

发布时间:2021-04-11 15:50:54 阅读: 来源:注塑加工厂家

8. ENVIRONMENTAL CHARACTERISTICS

(1) Temperature Coefficient of Resistance (T.C.R.)

Test Method: Measure resistance at +25°C or specified room temperature as

R1, then measure at -55°C or +125°C respectively as R2.

Determine the temperature coefficient of resistance from the

following formula.

R2-R1 `

6 T.C.R.= ----------------- X 10(PPM/°C)

Where t1 =+25°C or specified room temperature

t2 = -55°C or +125°C test temperature

R1=resistance at reference temperature in ohms.

R2=resistance at test temperature in ohms.

Acceptance Standard: (Refer to item 5)

R1 (t2-t1)

(2) Thermal Shock

Test Method: -55±3°C, 2 minutes and +125±2°C, 2 minutes as one cycle. After

5 cycles, the specimen shall be stabilized at room temperature for

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