HBM WTX120, Руководство по эксплуатации

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WTX120
A4500-1.1 HBM: public
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10.2.24 Systematic difference (Syst.diff.)
In filling processes, depending on the plant it may happen that a certain
amount of fill material is lost, or additional material fed in, after each fill. Conse­
quently, this shortfall or surplus, which only occurs after checkweighing, cannot
be detected by the optimization process. You can, however, use the “System­
atic difference” function to take account of it.
Activate the function by the Syst.diff. parameter, specifying the overfill (positive
value) or underfill (negative value) as appropriate. A maximum of ±5% of the
nominal value is allowed.
Example
When filling sacks with a target weight of 50 kg, the sack is released after
checkweighing. During release, the sack clamp takes about 200 g of material
from the filled sack, so that the released sack only weighs 49.8 kg instead of
50 kg.
In this case enter 20 as the correction factor for Syst.diff., resulting in overfilling
of 200 g (10 * P1 of SYD). As a result, the sack will initially be filled with
50.2 kg, and after release will have the target weight of 50 kg.
10.2.25 Maximum dosing time (Max.dos.t(s))
The dosing time starts when dosing starts (RUN command or digital input or
Enter key) and ends with the checkweighing (Finished signal). If the maximum
dosing time has been exceeded, the dosing process is aborted with an error,
and the coarse and fine flow outputs are deactivated (
see chapter 10.2.11
„Alarm:Empty“ ).
10.2.26 Tare delay(s)
You can use this time to block out disturbances, such as due to sack opening
or mounting a container. Set the tare delay so that any such disturbances have
been eliminated before taring begins.