Xylem WQL-pH pH DATALOGGERS - Manual (Page 63)

WQL-pH Maintenance, cleaning, storage
137 ba75821e01 10/2009
11 Maintenance, cleaning, storage
11.1 General maintenance instructions
General
information
z Normally, all screw joints of the logger housing can be opened and closed
by hand, without using any tools. If necessary, use a paper towel so you
get a better grip on the parts. Should the coupling ring for the electrode be
stuck, for example after a long-term logging job, you can use a wrench
(wrench size 16 mm) on the hexagon.
z In the screwed condition, no gaps may be visible at the joints.
z Change the electrode in a clean and preferably dry environment.
Thoroughly dry all parts. Moisture in the screw joint can affect the
functioning of the logger.
z Prior to unscrewing any screw joints, clean the exterior of the logger (see
section 11.2 E
XTERIOR CLEANING ) and dry it thoroughly.
z Prior to reassembly, clean all internal and external threads thoroughly.
Contaminated threads can get stuck by-and-by. Normally, the threads can
be screwed together without using any effort and without noticeable
grinding (sand particles).
z
Clean all O-rings prior to reassembly. Dirt, e.g. fibers, on the O-rings can
affect the tightness.
11.2 Exterior cleaning
Clean the logger with tapwater and a soft sponge or brush. Remove the
protective hood. The electrode should be cleaned with a soft toothbrush or
paintbrush under running tap water.
Note
For the cleaning of the electrode please also read the operating manual of
the electrode.