Specifications
Pur•Chek
™
Instruction 2100-9000 13
TO SET THE
ELEVATION PRESS
ELEV BUNNON
TO SET THE
LCD CONTRAST
PRESS CONT
Figure 23.
Figure 24.
ELEV CONT DONE SET FEED DONE
SETTING
045
ADJUST CONTRAST
FROM 0 TO 80
5.3 Changing the 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 discol-
oration. The round ends of the fi lter may always appear red. If red spots or discolorations are discovered, 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 Cleaning the Sample Hoses
Inspect the inside diameter of the inner tube for signs of oil build up, dirt, obstructions, kinks, cuts, fraying, or
any other signs of wear. Oil contamination can be cleaned out of sample hoses as directed below. Hoses that
show signs of wear should be replaced immediately to avoid dangers of rupture or bursting.
Remove the hose from the instrument and fl ush with isopropyl alcohol until the oil is thoroughly cleansed from
the inner tube.
WARNING: Flush hoses away from sparks, open fl ames or other ignition sources and in an
area that is well ventilated.
Dry the hose by blowing clean, dry nitrogen or shop air through the inner hose or by allowing the hose to air-dry
for several hours. Take care to not dry the hose with shop air that is lubricated. When the hose is completely
dry, re-inspect the hose for signs of wear, as described above, and replace if wear is evident.
5.5 Changing the Printer Paper
Pur•Chek™ Advanced Refrigerant Identifi ers that are equipped with on-board printers use a custom, inexpen-
sive 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 25. Press the “SET” button to advance to
the screen shown in Figure 26 and then press the “FEED” button.