Buchi UV-Vis Detector C-640 Instrukcja Użytkownika Pobierz pdf (Strona 34)

6 Maintenance and repairs

34 C-640 Operation Manual, Version A

Note

To change the thickness of the liquid layer (the optical path) between the two cell windows, one or

both windows can be reassembled in a different orientation. (See Figure 6-2)

By default the optical path through the cell window is adapted to 0.3 mm according to schema a

in ﬁgure 6-2. For samples with lower concentration the length of the optical path can be increased

according to schema b and c.

0.1 - 0.4 mm 1.1 - 1.4 mm 2.1 - 2.4 mm

a) b) c)

Figure 6-2: Adjustment of the optical path

After assembly, carefully tighten the screws crosswise using a watchmaker’s screwdriver.

Notice

Risk of instrument damage by wrong handling.

• Do not use too much force while tightening the screws - otherwise the cell windows may

break! Only use a watchmaker’s screwdriver which does not allow a too high momentum.

Before installing the reassembled cell to the cell compartment carefully check the cell for any impurities

(dust, hairs) using a magniﬁer. (Any impurity within the cell will increase the signal noise.)

After installing the cell into the cell compartment perform a leakage test.

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Buchi UV-Vis Detector C-640 Instrukcja Użytkownika Strona 34