Page 165 - Testing Electronic Components
P. 165

If you place your analogue meter probes set to X 1 Ohm across the
                   “common (Com)” and the “normally close (NC)” pin and when you hear
                   the “tic” sound, you will see that the meter pointer will drop from the
                   zero Ohm to infinity (indicating open circuit).

                   Similarly when you place the probes across the “common (COM)” and
                   the “normally open (NC)” pin and when you hear the “tic” sound, you
                   will see that the meter pointer will move up from the infinity to zero

                   Ohms (indicating close circuit).

                   If you get such reading that’s mean the relay is working fine. If there is
                   no response from the meter (pointer won’t move) even though the relay
                   coil already been connected with the power supply, the relay need
                   replacement.











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