CO
2
Leak Detector
13
audible tone will alarm. Additionally, the visual
indicators will light from lower to higher; green LED
then orange LED then red LED (highest
concentration) as increasing of level indicate that
the location is close to the source.
When the instrument signals a leakage, pull the
probe away from the leak for a moment, then bring
it back to pinpoint the location. If the CO
2
refrigerant leak is large, setting the sensitivity
switch to LOW will make it easier to find the exact
site of the leak.
Reset the sensitivity switch to HIGH before
searching for additional leaks.
When you've finished leak-testing, turn off the
instrument and store it in a clean place, protect the
leak detector from possible damage.
(3) Leak Detection Procedure
Press and hold the ON/OFF button for one second.
The warm-up and calibration sequence takes
approximately 45 seconds. The sensitivity level
defaults to Medium at startup.
The most likely place for a CO
2
refrigerant leak is at
soldered joints in refrigerant lines and changes in
cross section or direction of these lines. The detect
changes in concentration of CO
2
refrigerant, not
the absolute concentration of CO
2
refrigerant. This
makes the detection of leaking locations possible
