Table of Contents
Advertisement
4.5. Liquid Sampling
Liquid sampling is an option that is exclusive to the Pur•Chek™ Pro. It permits the user to flash liquid into
vapor for introduction into the analyzer. To use the liquid sampling assembly, follow the steps below.
1. Inspect the high-pressure liquid sampling trap assembly and ensure that the plunger on the oil
trap syringe is completely depressed. Assemble the high side liquid sample hose as shown in
Figure 3-3 on page 6.
2. 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. Affix the high pressure
liquid sample trap assembly vertically to a tank with the magnet.
3. Open the high side valve of the cylinder. The liquid sample will exit the tank and flash to vapor by
the hose assembly. As the liquid is flashed, the plunger on the high pressure liquid sample trap
assembly will begin to rise and the flashed refrigerant sample will travel into the analyzer.
4. Wait for the plunger on the high pressure liquid sample trap assembly to expand past the outlet
port.
5. Press "Test" on the analyzer (see Figure 4-3 A).
6. Upon completion of the test, close the valve on the cylinder, disconnect the hose from the inlet of
the high pressure liquid sample trap assembly, and depress the plunger to expel any trapped oil.
7. Inspect the hose for signs of oil and replace the brass hose restrictor if necessary.
8. Disconnect the hose from the Pur•Chek™ Pro.
NOTE: Liquid sampling will likely clog the brass sample hose restrictor much faster than vapor
sampling. If the restrictor becomes clogged and the analyzer continuously displays "Non-
Condensable" or "Unknown Refrigerant" readings, you will need to replace the clogged
restrictor with a new one. To avoid oil or liquid contamination from entering the analyzer, have
a designated vapor and liquid brass sample hose restrictor for each form of testing.
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 4-4 A. Pressing the MORE button will display the screen shown in Figure 4-4 B. Once you have
completed your test, press 'DONE' to return back to the 'READY' screen Figure 4-3 A or refer to section
4.11 Printing the Test Results and Channel Data on page 13.
4.7. Contaminated Refrigerants
The Pur•Chek™ Pro includes the ability to detect and analyze the composition of many common R400
Series refrigerants in addition to R134a, R22 and hydrocarbons. In the event that the Pur•Chek™ Pro
determines that the primary refrigerant in the system or cylinder is one of the recognized measurable
10
(A)
Figure 4-4. Screens Showing Sample Test Results
Operation and Maintenance Instruction Manual
(B)
P/N 2100-9001 Rev 3
Advertisement
Table of Contents
