ABB 4623, Руководство пользователя, Страница: 9 / 32

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3.3 Cleaning Conductivity Cells
Before installing a conductivity cell, clean the electrodes as
follows.
3.3.1 Stainless Steel Conductivity Cells
Unscrew the outer electrode and thoroughly clean it with a
nylon-bristle brush (supplied) and a warm detergent solution.
Clean the central electrode in a similar manner, taking care not
to damage it. For more tenacious deposits a 2% hydrochloric
acid solution may be used. Rinse thoroughly with distilled
water after cleaning. The electrodes should have a dull,
frosted appearance which must not be removed by polishing
or abrasive cleaning. Refit the outer electrode.
3.4 Installing the Conductivity Cells
Caution . After cleaning and installing a
conductivity cell, ensure it remains filled with liquid and is
not allowed to dry out.
3.4.1 Bulkhead Socket – Fig. 3.7
3.4.2 Model 2278 Cell Dimensions – Fig. 3.8
Dimensions in mm
2 Fixing Holes
5mm dia.
100
Clearance
for removal
of plug
83
89
70
76
M20
Conduit
Gland Entry
Dimensions in mm
22 dia
95
200
Welded
Collar
Gasket
Tri-Clamp
63.5 50
3 MECHANICAL INSTALLATION
✶
Note. Used with cell types 2278. Mount the
socket at a convenient location close to the cell.
Fig. 3.7 Bulkhead Socket
Fig. 3.8 Model 2278 Cell Dimensions