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8 Maintenance
Attention:
The electrical connection is to be carried out by experts only.
Please open the instrument only with dry ambient conditions.
Do not damage the exposed electronics!
Attention:
- Do not use any benzene, alcohol, or other cleansing agents.
- Never treat the inner surfaces of the tipping bucket with
emery paper or something similar.
- Do not touch the inner surfaces with hands.
- Please take care that the draining pins are not deformed.
The instrument is designed in such a way that all of the parts requiring maintenance are easily
accessible once the case has been removed.
The most important factors for precise measurements are a free and undisturbed inflow, and clean,
grease-free inner surfaces of the tipping bucket.
The tipping bucket is made of zinc-plate, the surface of which is specifically oxidised, in order to
achieve a hygrophile surface. It guarantees an accurate draining behaviour of the measuring liquid,
and must not be removed mechanically.
The maintenance interval should depend on the degree of pollution of the instrument. It is advisable
to make a visual inspection at short intervals as particles falling from above, such as foliage, bird
dropping etc. can affect the measurement.
8.1 Cleansing Procedure
Tools Required:
- a clean cloth
- a small bottle brush
- a soft brush
- possibly gentle soap
Cleansing is carried out as follows: (s.a. Figure 1: Instrument construction):
1. Switch off supply voltage of heating.
2. Remove the filter
(14)
upward from the collecting funnel of the housing
(1)
and clean it.
3. Loosen the two screws
(2)
at the housing, remove housing and clean it.
4. Remove
filter
(12)
from the collector
(13)
and clean it.
5. The collector
(13)
with the
nozzle (9)
can be removed after unscrewing the knurled
screw
(11)
. Clean the nozzle boring by means of small bottle brush.
