Owner's Manual

Tru Pointe
Instruction 0019-9328
9
Whentheinstrumentrstdetectsanincreaseintherefrigerantlevel,the
leak rateLEDbeginsashingandtheaudibleindicatorbeginsticking
at a faster rate. If movement of the probe is stopped for more than 10 sec-
onds,theinstrumentwillself-zeroandreturntoitsidlestateeven though
refrigerant is still present.
Once the presence of refrigerant has been determined and the instrument
allowedtoself-zero,movingtheprobetowardtheleaksourcewillonce
again cause the instrument to respond in a positive manner. The instru-
ment’s audible and visual indications will fall if the probe is moved away
from the leak source.
Caution: Exposing the sensor to a steady stream of highly
concentrated refrigerant will severely reduce sensor life or
damage the sensor. Sensor life is directly proportional to the
amount of refrigerant that passes through the sensor.
Use the following general procedure to pinpoint the source of a leak:
 1. Movetheprobetipalongtherefrigerantlinesandaroundthettings
until the leak rateLEDbeginsashingandtheaudibleindicator
starts ticking at a faster rate.
2. Continue moving the probe tip in a direction that keeps the instru-
ment responding in a positive manner.
3. Once the source of the leak has been passed, the instrument’s visual and
audible indications will fall. At this point, reverse the direction of probing
so that the instrument once again responds in a positive manner.
 4. RepeatStep3untilasmallmovementoftheprobetipovertheleak
source results in the rapid indication of increasing and decreasing
refrigerant levels.
Sensor Failure Indication
A failed sensor is indicated when the high sensitivity LED begins to ash.
Refer to the Troubleshooting Guide Section of this manual for information
on how to remedy this condition.
Operation