Abacus Water Meter A - Umbilical Setting
The Type A meter features a removable control panel for Auxiliary Batch Authority Control by Umbilical Setting (ABACUS) which allows the preset quantity of water to be set for a production run.
It can then be disconnected, preventing the operator from changing the preset value.
This means that the operator only has to push the RUN push-button switch when a batch is required.
Some systems can have an auto-run facility by using an auxilliary volt-free contact on a separate production machine.