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UM-X
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6.8 Settings menu Offset (zero point offset)
The distance from the tank bottom to the 4 mA point is
designated as "Offset".
The distance is specified in 1 millimetre steps. The inch,
percentage and milliampere units are calculated and
displayed for information.
Input the distance using
[+] PLUS and
[-] MINUS
and confirm your selection with RETURN [ ].
It can happen that a switching point is less than 4 mA or more than
20 mA by changing the offset. If this happens, the relays do not switch
as desired and malfunctions can occur.
Check the current values in the menu items "Relays -> K1...K5 -> S-P On
and S-P Off". They must not be less than 4 mA and not more than
20 mA.
Example:
The tank height is set to 3,000 mm and the offset is set to 300 mm – corresponds
to 10%. As the relay switching points are set in percent, these points can also be
less than 10% and thus be less than 4 mA.
You need a password to change the tank height for the UM-O and
UM-O Ex equipment versions (overfill prevention).
Fig. 15:
"Offset" display