5
OPERATING INSTRUCTIONS
OPERATING TIPS
1. Switch the unit on
XL-1A - Move the ON/OFF switch to the ON position.
RX-1A - Press the "I/O" (Red and Green) key. All LED's will light for two sec-
onds as the unit performs a self check.
2. The unit will begin beeping at a steady rate.
3. Verify the battery level by observing the constant power indicator (see above).
4. Begin searching for leaks. When refrigerant is detected, the audible tone will
change to a 'siren' type sound, distinctly different from the base beep rate.
RX-1A - Additionally, the visual indicators will light progressively as described in
the Alarm Indications section.
5. RX-1A - Sensitivity can be adjusted at any time during operation by using the HI
or LO keys.
6. If a full alarm occurs before the leak is pinpointed, RESET the unit as described
above, to reset the circuit to a zero reference.
The following section includes several general operating tips, and the SAE J1628
recommended procedure for leak detection.
1. In areas that are heavily contaminated with gas, the unit may be reset to block
out ambient concentrations of gas. The probe should not be moved while the
unit is being reset. The unit can be reset as many times as needed.
2. In windy areas, even a large leak can be difficult to find. Under these conditions,
it is best to shield the potential leak area.
3. Be aware that the detector may alarm if the sensing tip comes in contact with
moisture and/or solvents. Therefore, avoid contact with these when leak check-
ing.
SAE J1628 Recommended Procedure
NOTE: On Automotive A/C Systems, test with the engine not in operation.
1. The air conditioning or refrigeration system should be charged with sufficient
refrigerant to have a gauge pressure of at least 340 kPa (50 psi) when not in
operation. At temperatures below 15° C (59° F) leaks may not be measurable,
since this pressure may not be reached.
2. Take care not to contaminate the detector probe tip if the part being tested is
contaminated. If the part is particularly dirty, or condensate (moisture) is present
it should be wiped off with a dry shop towel or blown off with shop air. No clean-
ers or solvents should be used, since the detector may be sensitive to their
ingredients.
3. Visually trace the entire refrigerant system, and look for signs of air conditioning
lubricant leakage, damage, and corrosion on all lines, hoses, and components.
Each questionable area should be carefully checked with the detector probe, as
well as all fittings, hose to line couplings, refrigerant controls, service ports with
caps in place, brazed or welded areas, and areas around attachment points and
hold-downs on lines and components.
