Conditions required for safe measurement of voltage exceeding 1000V DC [ DMMs, Clamp on meters ]

Home Service & Support FAQ Conditions required for safe measurement of voltage exceeding 1000V DC [ DMMs, Clamp on meters ]

QThe 1500V range of my CM4374 is CAT IV 600V/CAT III 1000V. Is there any requirement for safe measurement?

A

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    Lower FAIL displayed in withstanding voltage test

    Home Service & Support FAQ Lower FAIL displayed in withstanding voltage test

    QI am getting a "Lower FAIL" reading even though I tested the withstanding voltage of a known-good product.

    A

    Negative resistance value on a DMM

    Home Service & Support FAQ Negative resistance value on a DMM

    QMy DT4253 displays "-40 ohm" in resistance measurement. Why does this happen?

    A

    Timer calibration of withstanding voltage tester

    Home Service & Support FAQ Timer calibration of withstanding voltage tester

    QI would like to calibrate the timer of the 3153. When I set the timer to 1s, it takes about 1.3s to confirm the output voltage. Is the unit defective?

    A

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