This is an optional feature and will only be available if it has been licensed in the key file.
Acquire must be in Config mode to perform these steps.
Acquire can automatically send out signals to the sampler while a batch is being transferred.
In Calculated Sample Mode, Acquire will instruct the sampler to take samples at regular volume intervals throughout the course of a batch. For example, with a can size of 10 litres and a grab size of 1cc, if a ship is being loaded with 850,000 barrels then a grab will be made every 85 barrels.
In Periodical Sample Mode, Acquire will instruct the sampler to take samples at regular time intervals throughout the course of a batch.
In both modes sampler requests are made directly with the flow computer or PLC.
Note: If stream batching has been enabled, then each stream can have a different sampler assigned to it.
Warning: Acquire assumes an empty sample can when deciding how many grabs to make.
1. Open the Batch Settings screen
Follow these instructions to open the Batch Settings screen.
2. Click ‘Sampler’ in the left column
Note: Sampler is only available if the station is set to be active batching.
Calculated Sample Mode
Enter the fields as follows:
| Enable Sampler | This checkbox turns on sampler support for the station. When the sampler is enabled, Acquire will issue grab commands at regular intervals during a batch based on the amount batched. |
| Sample Mode | Select “Calculated” from the ‘Sample Mode’ popup menu. |
| Grab Command Field | This is the field that Acquire will write to when issuing a grab command. It can be any field in the Modbus map from a flowcomputer, PLC or sampler. |
| Grab Command Write Value | This is the value that will be written to the Grab Command Field to initiate a grab. |
| Sample Can Size | This is the size of the sampler can. The units must match the grab size units. |
| Grab Size | This is the size of a grab. The units must match the sample can size units.Number of Grabs = Sample Can Size / Grab Size |
Once these fields have been specified, the sample will automatically be taken at the correct interval based on the combined station flow rate during a batch.
Periodical Sample Mode
Enter the fields as follows:
| Enable Sampler | This checkbox turns on sampler support for the station. When the sampler is enabled, Acquire will issue grab commands at regular intervals during a batch based on the amount batched. |
| Sample Mode | Select “Periodical” from the ‘Sample Mode’ popup menu. |
| Grab Command Field | This is the field that Acquire will write to when issuing a grab command. It can be any field in the Modbus map from a flowcomputer, PLC or sampler. |
| Grab Command Write Value | This is the value that will be written to the Grab Command Field to initiate a grab. |
| Sample Period | This is the time in seconds between issuing the grab command. |
Once these fields have been specified, the sample will automatically be taken at the specified time interval during a batch.