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Configuration and Use Manual 157
Operation Mode – Batch
Operation Mode – Batch Totalizers and InventoriesOperation Mode – Custody TransferOperation Mode
18.5 Special cases in batch processing
This section describes two common situations in batch processing that may require special attention
from the operator.
18.5.1 Cleaning/purging the tubes
In normal processing, the batch totalizer increments whenever flow is detected. To run fluid through
the tubes without incrementing the batch totalizer:
1. Ensure that the Inhibit Totalizer batch control function has been assigned to a discrete input, as
described in Section 11.7.
2. Activate the discrete input or discrete event.
3. Run fluid through the tubes as desired.
4. When you are ready to resume totalizing, deactivate the discrete input.
18.5.2 Ending a batch while flow is present
In general, to end a batch:
• Automatically, the target must be reached and flow must be stopped.
• Manually, the batch must be stopped (paused) and flow must be stopped.
To end a batch while flow is present:
1. Ensure that the Inhibit Flow batch control function has been assigned to a discrete input, as
described in Section 11.7.
2. When the batch total reaches the target, activate the discrete input so that the batch can end
normally.
18.6 Batch AOC calibration
Batch AOC (Automatic Overshoot Compensation) keeps the actual quantity delivered as close as
possible to the batch target, by minimizing the amount of overshoot.
If batch AOC is enabled (see Section 11.5), batch AOC calibration is required to provide data for the
compensation process. Thereafter, batch AOC calibration is recommended:
• Whenever consistent overshooting or undershooting of the target occurs
• If equipment (valve or pump) is changed
Note: If batch AOC is not enabled, you cannot perform batch AOC calibration.
To perform batch AOC calibration:
1. From the Maintenance menu, select
Calibration (see Figure 4-2).
2. Select
Batch AOC.
3. Select
Start Calibration.
4. Press
EXIT repeatedly to return to the operation screen.
5. Run 2 to 10 batches.