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MicroAmps DC (µADC)
Microamps for flame rectifier diode test on a heater control. Connect
leads between flame sensor probe and control module and turn heating
unit on to read µA measurement. When the flame is on, there should be a
measurable µADC signal, typically under 10µADC. Compare measurement
to manufacturer’s specification to determine if replacement is necessary.
Ranges:
1000µA
Resolution:
0.1µA
Accuracy:
±(1.0% + 5)
Volts burden:
5V
Overload Protection:
600VDC or 600VAC rms
Capacitance (MFD)
Set to MFD to test motor start and run capacitors. Capacitors are one
of the most failure prone components in a HVACR system. Disconnect
from power and resistors between terminals. Discharge capacitor before
testing. If dIS.C is displayed, the capacitor needs to be fully discharged to
test. Press SELECT three times to enter Capacitance mode.
Ranges:
10nF, 100nF, 1000nF, 10µF, 100µF, 1000µF, 10mF
Accuracy:
±(3% + 15) 10nF, ±(3% + 5) 100nF to 1000µF, ±(5% + 5) 10mF
Resolution:
0.01nF
Overload Protection:
600VDC or 600VAC rms
Discharge Cap First!
