Application Notes
1. Start leak checking anywhere and
continue in a logical progression
through the entire system to locate all
leaks. If surfaces are particularly dirty,
or wet, wipe them off with a clean,
dry cloth to reduce filter clogging and
extend sensor life. DO NOT allow the
unit to ingest moisture. Use of the
supplied rubber probe tip helps
prevent moisture from being drawn
into the unit. Check ports for moisture
before inserting the probe.
2. After locating and repairing any leaks
requiring the use of the LARGE switch
setting, switch to the MEDIUM set-
ting and verify the system is free of
leaks. For HFC refrigerants only (such
as R134a), you also must verify the
system is leak free using the SMALL
setting. For CFC and HCFC systems
(such as R11, R12, R22, R123), the
MEDIUM setting is sufficient to verify
that the system is free of leaks that
require repairing.
Caution:
Equipment Damage Hazard
A. Submerging the probe in liquid will dam-
age the air pump.
B. Exposing the probe to a stream of pure
refrigerant coming out of a tank will severely
reduce the life or destroy the sensor. Life of
this rare-earth sensor technology is directly
proportional to the amount of refrigerant that
passes through it. With normal intermittent
service, the sensor can last for one year or
longer.
C. Exposure to high concentrations of refrig-
erant may require adjustment of sensor
heat. To check, repeat the test procedure in
“Heater Adjustment” section.
