CLAS AC 7490 Anleitung Handbuch - Seite 7

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AC 7490

ELECTRONIC LEAK DETECTOR FOR NITRO-TRACE TESTING (N2-H2)

INSTRUCTIONS

Tracer gas consists of a non-toxic, non- ammable, environmentally friendly (non-polluting) mixture of 5% Hydrogen

and 95% Nitrogen. For this reason, the Tracer gas can be released into the environment after the leak

detection procedure is completed.

The Tracer gas mixture complies with Article 6, Paragraph 3 of EU directive 2006/40/EC.

The AC 7490 detects the Hydrogen component of the tracer and because Hydrogen molecules are so small, it is

an ideal gas for leak detection. The Tracer gas is charged into an empty system at a pressure of approximately 75

psi (5bar). As Hydrogen is lighter than air, always probe slightly above the suspected leak area. Once the source

of the leak is located and repaired, the Tracer gas can be released and the system

can be recharged again with refrigerant. A nal check should then be performed using a SAE certi ed refrigerant

gas leak detector.

NOTE: Run engine with air conditioner on brie y to properly distribute the H2 Tracer gas.

Batteries

lnstall Batteries: Remove screw located at rear end of unit and pull down

hinged battery door to open as shown. Always insert all four batteries into

the battery compartment in the same direction.

Note polarity mark on the inside of the battery door for proper battery

orientation.

Sensor

Replace Filter: Unscrew sensor tip as shown to replace lter. Replace lter whenever it becomes visibly dirty or

every 2 to 3 months depending on use.

Replace Sensor: Remove sensor by pulling out of socket. lnstall the new sensor by aligning the notch in sensor cover

with the raised keyway on sensor socket holder (see gure below).

Note : Do not force sensor into socket. Misalignment can damage the sensor pins.