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PRO-WEI100-MAN-19V01 (0225) Copyright © 2019 Define Instruments
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E.g. Setting a setpoint value of 50Kg for SP 1 and 45Kg for SP 2 and enabling LIW batching will al-
low the user to fill a container to 50Kg, with a potential speed change at 45Kg. (See 2.1C for an
alternative method of setting up SP 2.)
The cycle is initiated when the
Batch function is triggered. The display will tare, and when 45Kg
net weight is discharged, SP 2 will drop out. As product continues to be discharged, at 50Kg SP 1
will drop out, halting the product flow.
If
Flash Gross is enabled (see 6.2L) the gross weight will be displayed (E.g. Now 950Kg, if the
starting gross weight was 1000Kg). The user can then trigger the Batch function again to call
another 50Kg batch.
In this mode if there is not enough product to drop a batch, then the instrument will advise the
operator by showing the message
Low Product . If gross > SP 1, the Batch Value is reset to zero
and the display flashes Batch . SP 1 is turned on (and SP 2 if set up). If gross < SP 1, batching is
not started.
2.1C - Setpoint Tracking
In applications where the batch weight is continuously being changed, it is possible
to configure SP 2 so that it tracks SP 1, and always turns off at a fixed amount below
the required batch weight.
E.g. If your initial batch weight was 100Kgs and you wanted SP 2 to turn off 5Kgs before it reached
the batch weight, you would set up the SP 1 value for 100Kgs and the SP 2 value for -5Kgs, and
set the
Trail SP 1 option to on (see 6.2D).
This would cause SP 2 to turn off at 95Kgs (i.e. 100Kgs - 5Kgs). Then if you wanted the next
batch weight to be 200Kgs, you only need to change SP 1 to 200Kgs, and without altering
SP 2 it will now turn off at 195Kgs (200Kgs - 5Kgs).
2.2 - Input signal averaging
This controller has input signal averaging (see 6.5), to reduce noise and optimise
stable measurement. If your input signal contains large noise spikes, you can increase
the size of the
Averaging Window to ensure that these are still averaged. If the
change in input exceeds the Averaging Window value it will not average, ensuring
fast response when there are large differences between readings.
Note that increasing the window size too far will reduce the ability of the controller to respond
quickly to real changes in input signal.
2.3 - Tare
To access tare features, the controller's Mode must be set to Normal (see 6.2F). It is
then possible to Tare/Reset Tare from the button or rear input pins: