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Lead Contents

Level Controller: Measure Resistance between Electrodes

FAQ No. FAQ03209

Primary Contents

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.