Pur•Chek
™
Pro
Instruction 2100-9001
10
4.4 Vapor Sampling
Vapor sampling is the most common process used for identifying refrigerants using the Pur•Chek™ Pro. It is a
simple process requiring the operator to take these 5 steps:
1.
Calibrate the unit as per section 4.3 of this manual.
2.
Connect the vapor sampling hose to the instrument, then to the Low Side Vapor port of the
system or cylinder.
3.
Open the low side valve of the cylinder and press test.
4.
Upon completion of the test, or when prompted, close the valve on the cylinder and disconnect
the hose from the cylinder.
5.
Disconnect the hose from the Pur•Chek™ Pro for storage.
4.5 Liquid Sampling
Liquid sampling is an option that is exclusive to the Pur•Chek™ Pro. It permits the user to fl ash liquid into vapor
for introduction into the analyzer. To use the liquid sampling assembly, follow these seven steps:
1.
Calibrate the unit as per section 4.3 of this manual.
2.
Inspect the liquid sampling assembly and ensure that the plunger on the oil trap syringe is com-
pletely depressed.
3.
Connect the appropriate end of the hose to the instrument and the opposite end of the liquid
sampling assembly to the High Side Liquid port of the system or cylinder. Affi x the oil trap
syringe vertically to the tank with the magnet.
4.
Open the high side valve of the cylinder. The liquid sample will exit the tank and be fl ashed
to vapor by the hose assembly. As the liquid is fl ashed, the plunger on the oil trap syringe will
begin to rise and the fl ashed refrigerant sample will travel into the analyzer.
5.
Wait for the plunger on the oil trap syringe to expand past the outlet port.
6.
Press test on the analyzer.
7.
Upon completion of the test, close the valve on the cylinder, disconnect the hose from the inlet
of the oil trap syringe, depress the plunger on the oil trap syringe to expel the trapped oil.
8.
Inspect the hose for signs of oil and replace the hose restrictor if necessary.
9.
Disconnect the hose from the Pur•Chek™ Pro.
4.6 Viewing the Test Results
Upon completion of the test, the Pur•Chek™ Pro will display a screen similar to that shown in Figure 8 or
Figure 9.
RESULTS
BASE SAMPLE
R22
CONTAMINATED
RESULTS
R22
97.0
R410a
3.0
Figure 8.
Figure 9.
BACK PRINT DONE
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