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The RTD gives the temperature in resistance unit (Ohm), so you put the RTD in water with ice (0 C/32 F) and you take the reading in Ohm unit in your multimeter, then you put the RTD in boiling water and you take the reading in Ohm. Then you compare the readings according to the table for Temp vs. Resistance to check.

It is important that water must be distilled, deionized. Tap water may give false readings as it has minerals.

Instead of water test, you can you thermowell which are devices where you program the desired temperature for check RTD and thermocouples.

Walter

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14y ago

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