Difference between a Memory HiCorder’s maximum rated voltage to earth and its maximum input voltage

QIn the specifications for a Memory HiCorder input unit, a maximum rated voltage to earth as well as a maximum input voltage are listed. What is the difference between these two characteristics?

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How can the 3665 measure LAN cable length?

QHow is cord length measured?

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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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Error upon connection check

QThe instrument indicates an error when it checks the connection, even though it is connected properly.

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Measurement of the secondary side of an inverter

QWhat type of instrument should I use to measure an inverter’s current and voltage?

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