Tracer TP-9364 PRO-Alert 2791 AM08046-2 - Manual (Page 3)

3
Getting Started
The PRO-Alert 2791 is shipped with the infrared cell and power stick installed. The nickel/metal hydride
batteries in the power stick are not yet charged. To charge them, connect the cord of the AC charger/
adapter to the power jack at the rear of the instrument, and plug the adapter into the appropriate mains
outlet. The battery charging light (rear left side) will flash when the detector is charging, changing to
steady illumination when the power stick is charged. Allow 10 hours for the full charge.
NOTE: You should expect 6 hours of operation from a fully charged power stick. The PRO-Alert 2791
will operate from the AC adapter/charger. Connecting the supplied AC adapter/charger will allow
operation of the detector while the power stick charges.
Using Your PRO-Alert 2791
WARNING
DO NOT OPERATE THIS INSTRUMENT IN THE PRESENCE OF GASOLINE, NATURAL GAS,
PROPANE, OR IN OTHER COMBUSTIBLE ATMOSPHERES.
Using the PRO-Alert 2791 is simple. Press the power (left) switch once to turn the detector ON. The green
ON indicator lamp will illuminate, and the yellow indicator lamps will illuminate from left to right in a running
fashion while the infrared cell warms up (approximately 60 seconds).
When the detector is warmed up and ready for use, the yellow lamps extinguish and you will hear a
steady beeping. The PRO-Alert 2791 is on HIGH (top light is illuminated). Press the sensitivity switch (right)
once to go to MED (both lights are illuminated) and once again to go to LOW (bottom light is illuminated).
The PRO-Alert 2791 provides similar responses to all HFCs and refrigerant blends (i.e., R-134a)
General Information
The PRO-Alert 2791 Electronic Refrigerant Leak Detector is design certified by Intertek to meet SAE
J2791, “Rating Criteria for Electronic Refrigerant Leak Detectors” for R-134a. The following SAE
Recommended Practice applies to this instrument only.
WARNING: Do not use cleaning agents or solvents on or near refrigerant lines. Wipe away dirt or
potential false-triggering chemicals using a dry shop towel or shop air before leak testing. A leak detector
may false-trigger in contaminated atmosphere. Avoid leak testing in severely contaminated areas.
An electronic leak detector may falsely indicate a leak in the presence of certain underhood chemicals.
The table below lists some common underhood chemicals and indicates whether or not they will cause a
false-trigger from the PRO Alert 2791.
Chemical False-trigger
Windshield washer solvent (methanol base) YES
Ford spot and stain remover YES
Ford rust penetrant and inhibitor YES
Ford gasket and trim adhesive YES
Permatex natural blue cleaner and degreaser YES
Ford brake parts cleaner YES
Ford spray carburetor tune-up cleaner YES
Ford clear silicone rubber NO
Motorcraft G-05 antifreeze / coolant NO
Gunk liquid wrench NO
Ford pumice / lotion hand cleaner NO
Ford Motorcraft DOT3 brake fluid NO
Ford silicone lubricant NO
Dexron automatic transmission fluid NO
Mineral engine oil NO
Leak test with the engine off.
a. Charge the system with sufficient refrigerant to have a gauge pressure of at least 340 kPa (50 psi)
with the system off. At ambient temperatures below 15 °C (59 °F) leaks may not be measurable
because the pressure may not be reached.
b. Visually trace the entire refrigerant system, and look for signs of air conditioning lubricant leakage,
damage and corrosion on all lines, hoses and components. Check each questionable area with the
detector probe, as well as all fittings, hose-to-line couplings, refrigerant controls, service valves with
caps in place, brazed or welded areas, and areas around attachment points and hold-downs on lines
and components. If looking for an apparently larger leak, check first at the MED or LOW sensitivity
setting.
c. Always follow the refrigerant system around in a continuous path so that no areas of potential leaks
are missed. If a leak is found, always continue to test the remainder of the system.
d. Recheck service valves with caps removed. Blow shop air over service valve to clear immediate area,
and then check with detector on MED sensitivity setting.