Measured values on my insulation resistance meter vary. What might be causing this?
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The digital insulation resistance meter I’m using displayed “OF.”
QWhat does this mean?
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New standard for test probes
QI heard that the IEC 61010 international safety standard for measuring instruments has been revised. What has changed?
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The polarity (+/-) was reversed when I made a measurement using the resistance range. Is the instrument broken?
QI have a question about an analog tester. The polarity (+/-) is reversed when performing measurements with the resistance range. Why is this? Wouldn’t this invite mistakes, for example when checking diode polarity?
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Inability to start a withstanding test
QWhen I try to start the test, measurement does not start.
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Infrared thermometer measurable temperature range
QHow far away can an infrared thermometer take readings?
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Clamp sensor voltage to earth
QThe specifications for the Clamp On Leak HiTester 3283 indicate a maximum rated voltage to earth of 300 V rms AC (insulated conductor) (CAT III, 300 V). Can the 3283 be used to measure a 3-phase 400 V circuit?
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What is total harmonic distortion (THD)?
QWhen using a power meter, I noticed a THD setting in the harmonic settings. What is this? What’s the difference between THD-F and THD-R?
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Display of measurement data in a format such as “1.05E+02”
QWhen I used Excel to view measurement data recorded onto a PC card with a clamp-on power meter, the voltage U1 was displayed in a format such as “1.05E+02.”
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Loss due to the instrument connection method
QDo measured values vary with the power meter connection?
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