Bacharach PUR-CHEK PRO Spezifikationen PDF herunterladen (Seite 18)

Pur•Chek

™

Pro

Instruction 2100-900114

5.3 Changing the White Plastic Sample Filter

When inspecting the sample ﬁ lter, look completely around the entire outside diameter of the white ﬁ lter element

located inside of the clear plastic housing. Look for red spots or the beginnings of discoloration on the white

outside diameter of the element. Do not look into the round ends of the white element for red spots or discolor-

ation. The round ends of the ﬁ lter may always appear red. If red spots or discolorations are discovered on the

outside diameter, the sample ﬁ lter requires replacement to prevent the inﬂ ux of particulate and oil mists into the

instrument.

Obtain a replacement ﬁ lter, P/N 2100-0006. Remove the existing ﬁ lter from the retaining clip of the instrument

by pulling straight up and out. CAREFULLY remove the ﬂ exible, black rubber tubing connections from both

ends of the existing ﬁ lter. DO NOT allow the tubes to slip back into the internal portion of the case. Discard the

existing ﬁ lter in an environmentally friendly manner.

Install the tube ends onto the barbs of the replacement ﬁ lter, taking note to align the ﬂ ow arrow of the ﬁ lter with

the ﬂ ow arrow of the instrument top panel. CAREFULLY slide the tubing back into the internal portion of the

instrument and seat the new ﬁ lter into the retaining clip. Inspect the sample hoses for signs of oil entrapment.

Replacement of the sample ﬁ lter usually requires cleaning or replacement of the sample hoses.

5.4 Replacing the Sample Hoses

Inspect the inside diameter of the tube for signs of oil build up, dirt, obstructions, kinks, cuts, fraying, or any

other signs of wear. Oil contamination cannot be cleaned out of sample hoses due to the density of the oil

restrictor. If oil is visible in the Low Pressure Vapor hose, replace the hose and restrictor with P/N 2100-0010.

For the High Side Liquid Sampling Hose, inspect the inside diameter of the tube for signs of oil build up, dirt,

obstructions, kinks, cuts, fraying, or any other signs of wear. Oil contamination cannot be cleaned out of sample

hoses due to the density of the oil restrictor. If oil is visible in the High Pressure Liquid Trap Hose, replace the

hose and restrictor with P/N 2100-0010.

To replace the Restrictor Assembly, do the following:

1. Disconnect the sample hose from the analyzer

2. Remove the brass ﬁ lter (with hose attached) from the coupler and discard. Be sure to use a

backing wrench so as not to damage the coupler.

3. Check for signs of oil and debris in the coupler.

4. Using a cleaner that contains ONLY Tetrachloroethylene and carbon dioxide, spray all parts of

the coupler with the cleaner to remove the oil, per the cleaner’s instructions. DO NOT soak the

park for more than 60 seconds.

5. Allow couple parts to dry. Check coupler parts for oil again. Failure to clean the oil out of the

coupler will result in premature clogging of the new ﬁ lter.

6. Install the new ﬁ lter (P/N 2100-0010), into the coupler and lightly tighten. Finger tight is

sufﬁ cient.

5.5 Changing the Printer Paper

Pur•Chek™ Pro Diagnostic Refrigerant Analyzers use a custom inexpensive thermal paper for printing. The

paper roll should be changed when a red stripe appears on the left side of the printout.

To change the paper roll, press the “HELP” button on the “Ready to Air Cal” screen as shown in Section 4.2,

Figure 3. The screen will display several options as shown in Figure 22. Press the “SET” button to advance to

the screen shown in Figure 23 and then press the “FEED” button.

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