Maximum Positive Zero Setting Limit (Semi-Automatically); Standstill Monitoring - Siemens SIWAREX WP251 Manual

8.3.20

Maximum positive zero setting limit (semi-automatically)

Zero setting defines the current weight of the scale as zero weight.
For the zero setting (semi-automatic, automatic and tracking), the effect of the function can
be limited by specifying limits. The reference point for the effect of the limitation is not the
current weight but rather the weight that the scale would have displayed had it not been set
to zero beforehand (zero point at time of scale calibration).
For scales in operation where official calibration is required, the limitation between the
negative and positive weight for the zeroing is 4% of the maximum weighing range.
Example:
Maximum weight = 100 kg
Negative zeroing limit (semi-automatic) = 1%
→ Up to 1 kg (1% of 100 kg) can be set to zero by the zero setting function.
8.3.21

Standstill monitoring

Standstill monitoring is used to recognize when the scale is at steady state. Scale standstill
is established when the weight value changes by less than a specified weight range
(standstill range) within a specified time (standstill time).
WP251 has two independently formed standstill criteria (Standstill 1 and Standstill 2), which
are queried at various points inside or outside the dosing cycle.
In the following situations, Standstill 1 must be present in order to perform the corresponding
action: Tare, Zero setting
In the following situations, Standstill 2 must be present in order to perform the corresponding
action: Tolerance check, Logging
SIWAREX WP251
Manual, 12/2015, A5E37203357A
Scale parameters and functions
8.3 DR 3 Calibration parameters
71