How to add anti-freeze agent:
䡵
Preparing the anti-freeze solution: Mix 1 litre of anti-freeze with 0.4 litre of
water.
䡵
Carefully add anti-freeze solution to the collecting bucket (the pipe housing
does not have to be removed for this).
Please note:
Add anti-freeze agent only as an aqueous solution (add 40 % of
water)! Never use neat! (POWERCOOL is hygroscopic.)
Note on disposing of anti-freeze solution
Typically, the anti-freeze solution of a single precipitation gauge may be disposed
of into the public sewage system. However, observe all applicable local regulations.
Please refer to your local authority responsible for questions regarding disposal
and/or contact Thermochema GmbH.
Note on winter operation without anti-freeze
Basically, the unit may be operated in the winter season without adding anti-
freeze solution. However, this mandatorily requires the collecting bucket to be
checked and emptied in regular intervals!
Please note: When the accumulated precipitation freezes that has
filled the collecting bucket up to 80 %, this may result in perma-
nent damage to the weighing mechanism.
Note on third-party anti-freeze solution products
Basically, third-party products may be used provided the following requirements
are met:
䊳
Good solubility in water, low-density (i.e. the anti-freeze agent does not settle
below the water).
䊳
Low evaporation (do not use methanol).
䊳
Little corrosive effect on aluminium and stainless steel.
䊳
Low freezing point even with high collecting bucket level.
䊳
Low hygroscopic properties (absorption of moisture from ambient air, which
would affect the measurement results).
䊳
Note chemical compatibility with collecting bucket (ASA).
䊳
No gumming after use in open containers for several months.
7.3 Performing the visual inspection
䡵
Check smooth movement of the collecting bucket in all directions at the lower
edge of the bucket orifice. The collecting bucket upper edge may not contact
the pipe housing!
䡵
If present, carefully remove any contamination (e.g. insects, insect nests, spider
webs, etc.), and icing.
7.4 Additional checks in cases of defect
䊳
Is the collecting bucket distorted?
䊳
Is the collecting bucket correctly positioned on the bucket support?
䊳
Is the pipe housing correctly positioned and not damaged?
䊳
Is the weighing mechanism contacting other components, e.g. caused by
contamination?
䊳
Is the red LED flashing (refer to Fig. 18)?
䊳
Use Chapter 7.5 to isolate the failure.
䡵
If in doubt, perform a Guided Accuracy Test as described in Chapter 7.6.
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