SIAM DUA-1, Руководство по эксплуатации

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Automatic well sounder “DUA-1”
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* The valve sealing rubber ring ( p.5 figure 1) is possible to be
replaced by operating personnel
3.2. Cleaning Tapered Connecting Thread, Acoustic Sensor, Well
sounder and Sensor Case
Cleaning is done using pure gasoline, a brush and a cleaning rag. It
is allowed to pour a small amount (50…100ml) of gasoline inside the
threaded coupling cavity while cleaning. However, do not immerge the
well sounder housing in the cleaning liquid, and do not let its ingress in the
connector. When cleaning a very dirty thread, application of metal tools
(an awl, a screwdriver, etc.) is allowed, but do not apply an excessive force
not to damage the thread.
It is strictly forbidden to use a metal tool for cleaning the acoustic
and pressure sensors. Moreover, be careful not to apply much force during
cleaning. Acoustic sensor housing is covered with a protective varnish, do
not damage it! It is forbidden to insert foreign objects in the pressure
sensor hole!
Wipe the surfaces with a rag after washing. Cleaning should result
in a metallic lustre on the coupling surfaces, connecting thread, acoustic
sensor, and clean holes of pressure sensor and fitting.
The outer surfaces of pressure sensor are wiped with a clean rag,
wetted in a small amount of gasoline, and then wiped dry.