The way to Determine Refrigerants 1Use a "Go/no-go" ">Car Diagnostic Tools; refrigerant identification unit to test for R-12 or R-134a, if you want a basic "pass/fail" for these distinct refrigerants. Purchase a a lot more in depth diagnostic tool if you want the instrument to also test for hydrocarbons. Perform the required pre-operational procedures by inspecting the sample filter, the proper hose depending upon the kind of refrigerant you're testing for, and all port openings.
In the event the filter shows discoloration or the hose has signs of damage, replace the things.2Enter the nearby elevation into the instrument settings during the warm-up period, due to the fact the diagnostic tool is sensitive to 500-feet elevation alterations above sea level. Self-calibration will happen right after the warm-up stage as the unit will draw in ambient air. Location the sample hose towards the vapor port (low side) in the refrigerant's storage vessel or automobile's air conditioning method after completed calibration ">Obd2 scanner.
The moment the pressure gauge reaches 9-psig (pound-force per square inch gauge), you will disconnect the hose from the refrigerant supply as the diagnostic tool analyzes the sample.3Review the analysis reading. The readings will show a "PASS LED" when the diagnostic tool detects a 98-percent or greater concentration of weight for R-134a or R-12. The diagnostic tool will display the weight concentrations of R-134a, R-12, R-22, air and hydrocarbons. In the event the sample analysis tool detects less than 98 percent for R-134a or R-12, a reading of "FAILED LED" will seem and the alarm will sound 5 times. In the event the tool detects two percent or greater for hydrocarbons, the alarm will sound 30 occasions.
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