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3.3 PRESET MODE
When in Preset mode, the Trac-40 is designed to operate as a batch controller. The quantity to be
delivered must be entered via the front keypad or via serial communications. Once the batch quantity is
delivered, the relays will open and the batch ended.
3.3.1 Starting a Batch
To start a batch, the RESET key is pressed and held for 2 seconds. After 2 seconds, a reset will occur and
the delivery number will be incremented. Relay 1 will close and flow should then start. If flow does not
start, the unit will wait 3 minutes and record an "End of Delivery". A ticket will be automatically printed
if a printer is installed and the total is greater than the Clearable Minimum Total.
3.3.2 End of Batch
An End of Batch occurs with any of the following:
1. Batch is complete
Once the flow total reaches the programmed batch quantity and has stopped for a period longer than
the timeout period, the delivery is complete. An "End of Delivery" is recorded and a ticket is
printed if a ticket printer is connected.
2. The PRINT/STOP key is pressed at any time
When the PRINT/STOP key is pressed Relays 1 and 2 will immediately open. If there is no flow and
there has been a signal timeout, an "End of Delivery" is recorded and a ticket is printed.
If there is flow, the delivery will not be complete until the flow has stopped for a period longer than
the timeout period. Once this has occurred, a ticket will be printed if a ticket printer is connected.
3. Flow is interrupted for longer than 3 minutes
If the flow is interrupted for a period longer than 3 minutes, the delivery is complete and a ticket is
printed if a ticket printer is connected.
3.3.3 End of Delivery Signal
An End of Delivery signal from an open collector transistor is output on Connector 3 Terminal 7. When
reaching the End of Delivery, the output transistor is switched on and will remain in the "on" state until
the instrument is reset.
3.3.4 Batching on Gross or Net Total
When operating in Preset mode, the Trac-40 can be programmed to batch on either the Gross Total
which is uncompensated or on the Net Total which is compensated for temperature.
Both totals are reset at the beginning of each delivery.
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