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5.4 Replacement of the filter elements
The filter construction is shown in Figure 5.1.
1
nut;
2
ring;
3
nut;
4
spring;
5
ring;
6
fabric filter element (black)
(included in the Accessories kit);
7
gauze;
8
gauze;
9
fabric filter element № 1 (white) (included in
the Accessories kit);
10
fabric filter element № 2 (white) (included in
the Accessories kit)
Figure 5.1 – Filter construction
The replacement procedure consists of the following steps:
•
turn the instrument off and remove the battery;
•
switch the CWA module into the calibration mode (refer to section 3.4.2.1); display
shows "CHEM: CALIBRATION";
•
unscrew and remove the nut (1) using a screw key (included in the Accessories kit);
•
unscrew and remove the nut (3);