Bacharach PUR-CHEK PRO Manuál s instrukcemi stáhnout pdf (Strana 19)

Operation and Maintenance Instruction Manual

P/N 2100-9001 Rev 3 15

5. Maintenance and Troubleshooting

5.1. Setting the LCD Contrast

The Pur•Chek™ Pro features an adjustable LCD contrast for use in varying light conditions. To adjust the

contrast, press the SET button which appears after the unit is powered on. The screen will display

several options as shown in Figure 5-1 A. Press the SET button to display the options in Figure 5-1 B.

(A) (B)

Figure 5-1. Sample Screens Used in Setting LCD Contrast

5.2. Changing the White Plastic Sample Filter

When inspecting the sample filter, look completely around the entire outside diameter of the white filter

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 discoloration. The round ends of the filter may always appear red. If red spots or discolorations

are discovered on the outside diameter, the sample filter requires replacement to prevent the influx of

particulate and oil mists into the instrument.

To replace the white plastic sample filter, follow the instructions below.

1) Obtain replacement filter P/N 2100-0006 (see Table 1-2 on page 3).

2) Remove the existing filter from the retaining clip of the instrument by pulling straight up and out.

3) CAREFULLY remove the flexible, black rubber tubing connections from both ends of the existing

filter.

IMPORTANT: DO NOT allow the tubes to slip back into the internal portion of the

case.

4) Discard the existing filter in an environmentally friendly manner.

5) Install the tube ends onto the barbs of the replacement filter, taking note to align the flow arrow of

the filter with the flow arrow of the instrument top panel.

6) CAREFULLY slide the tubing back into the internal portion of the instrument and seat the new

filter into the retaining clip.

7) Inspect the sample hoses for signs of oil entrapment.

8) Replacement of the sample filter usually requires cleaning or replacement of the sample hoses.

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Bacharach PUR-CHEK PRO Manuál s instrukcemi Strana 19