Operation
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The process can be stopped at any time by pressing the STOP key, whereby
both outputs will immediately switch off. The process can then be aborted
and the batcher reset by pressing the STOP key again, or the process
continued by pressing the RUN key.
If the process is continued and the instrument was previously in the slow
start or main control phases (i.e. not the prestop phase), the timer will be
reset and a slow start will occur with a full time delay to ensure a correct
start up. The totals will not be reset and the batch quantity will remain
unchanged.
3.3.2 Signal Timeout
The Signal Timeout period defines a time interval which is used to detect if
the low has stopped. If there is no signal input for a time greater than the
Signal Timeout period, the flow is deemed to have stopped. A Signal
Timeout period detects the loss of signal midway through a batch when the
outputs are on. In this case, the Batcher will enter a Flow Alarm condition
and switch off the outputs.
The Flow Alarm condition is maintained until acknowledged by pressing the
STOP switch. The alarm condition is also signalled to the operator by the
PAUSE message being flashed on the display.
The instrument enables the user to program a time interval of up to 99
seconds to detect an absence of signal input.
If the Signal Timeout is set to 0, this function is disabled.