Owners Manual

902 FC
Users Manual
14
3. Measure the resistance by touching the probes to the desired
test points of the circuit.
4. Read the measured resistance on the display.
Note
If the resistance is <30
e , the continuity beeper sounds
and indicates a short circuit.
Measure Microamps μ A
The μA dc () function on the Product is primarily for HVAC flame
rod testing.
To test a heating system flame rod (see Figure 2):
1. Turn the heating unit off.
2. Locate the wire between the gas-burner controller and the
flame rod, and break this connection.
3. Turn the rotary switch to
.
4. Use alligator clips to connect test leads between the flame
sensor probe and control-module wire.
5. Turn heating unit on.
6. Read the measured amps on the display.
7. Refer to the heating unit documentation for what the desired
value should be.