The batch relay is dedicated to valve on/off control and it can be
manually or automatically compensated for batch overrun.
Manual overrun compensation allow the operator to compensate
for valve closure time.
The operator is requested to enter the
overrun volume to de-energize the batch relay early, compensating the valve closing
time and the batch overrun error.
Automatic overrun compensation counts sensor pulses during batch operation and any
extra pulses after batch stop.
The instrument calculates the estimated overrun volume
and automatically reduces the batch size for the next batch cycle.
During the next
batch cycle, the batch relay will de-energize early closing the valve early and
eliminating the overrun error.