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FAQ03209 of Level Switches FAQ

FAQ No. FAQ03209

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Question

How is the resistance between electrodes of the Level Switches measured?

Answer



How to measure the resistance between electrodes

Since the resistance between electrodes cannot be measured by a tester, use an ammeter able to read approximately 1mA with as low an impedance as possible and a voltmeter able to read a value of several volts with as high an impedance as possible to measure the current and voltage between electrodes.

Calculate a resistance value from the measured voltage and current values by using Ohm's Law.

As for the resistance between electrodes, refer below.

* Perform the measurement while the Floatless Level Controllers "61F" unit is wired to each end of electrodes E1-E3.

An ammeter able to read approximately 1mA with as low an impedance as possible.

A voltmeter able to read a value of several volts with as high an impedance as possible.