User Manual

Pre-Operation Procedure

1. Inspect the sample filter for signs of red spots or discoloration anywhere on the white

outside diameter of the filter element. If any red spots or discoloration are noticed,

REPLACE THE FILTER BEFORE USING THE INSTRUMENT.

CAUTION

When red spots or discoloration begin to appear on the white outside diameter of

the filter element, REPLACE THE FILTER. Failure to correctly maintain the sample

filter may result in severe instrument damage not covered under warranty.

2. Select the R-12 or R-134a sample hose according to the application. Inspect the hose

for signs of wear, such as cracking, fraying, or kinks. Verify the hose is not obstructed

and no oil is present inside the hose. If the hose shows signs of wear, obstructions, or

oil, IT MUST BE REPLACED (or cleaned) BEFORE USING THE INSTRUMENT.

3. Install the sample hose onto the inlet port of the instrument. The hose connector needs

only to be fingertight to achieve a gas-tight seal.

4. Inspect the air intake port, the sample exhaust port, and the case vent ports of the

instrument to verify they are clear and unobstructed.

5. Verify the purge vent port cap is securely installed onto the port.

WARNING

Failure to correctly install the cap onto the purge vent port results in excessive

loss of refrigerant during the refrigerant identification procedure, which is a

health hazard. A refrigerant identification is ALWAYS performed before an air

purge procedure.

6. Inspect the sample port of the refrigerant storage cylinder or vehicle air conditioning

system to be tested. Verify the port is the LOW SIDE or VAPOR port.

Operating Procedures