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 a
nd the
flame rod, and b
r
eak this connection.
3.
Turn the rotary switch to
.
4. Use alligator clips to connect test leads between th
e flame
sensor probe an
d control-module wire.
5.
Turn he
ating unit on.
6.
Read the measured amps on the display.
7.
Refer to the heating unit documentation for what the
desired
value should be.