How to do Functional Tests on Resistance Temperature Detectors (RTD) sensors?
Follow this test procedure:
1. Verify RTD
Place the positive (+) lead of your multimeter on I+ or V+ and the negative (-) lead on V- or I. You should measure the resistance that is expected of the sensor’s temperature at the time of this test.
2. Verify sensor leads: measuring between the I and V leads
- Measure the resistance between the I+ and V+ leads. You should measure the total resistance of your wire.
- Measure the resistance between the V- and I- leads. You should measure the total resistance of your wire.
3. Verify sensor leads: isolation
- Place one lead of your multimeter on I+ or V+ and the other lead to your system ground. You should measure an “open” (infinite resistance).
- Place one lead of your multimeter on I- or V- and the other lead to your system ground. You should measure an “open” (infinite resistance).