Liquid Controls SP2800 - Manual (Page 32)

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3-11 Run Mode (continued)
3-11.4 Start and Stop Operation.
The Batcher is designed for batching opera-
tions. The batching operation is controlled by
two internal relays, Preset and Prewarn set-
tings and the CLR , START and STOP but-
tons on the front panel.
A typical operation proceeds as follows:
a) The Preset is accessed and changed
to the amount desired.
b) The unit accepts input signals
c) The CLR button is pushed to reset
the Batch Totalizer.
d) The Start button is pushed and the
process begins.
e) The Stop button can be pushed at any
time to temporarily halt the process
(the Start button resumes it from where
it stopped).
f) The display shows Rate, Total or
Grand Total.
g) The Prewarn is reached and the pro-
cess is slowed down.
h) The Preset is reached and the process
is halted.
The Batcher will always accept input pulses
whether the unit is Started or not! All pulses
on the input terminal are counted and shown
on the display. This means that all pre-run
and post-run pulses will be recorded. For this
reason, always press the CLR button before
start.
The START button energizes the Preset
and Prewarn relays.
The STOP button de-energizes the Preset
and Prewarn relays.
(The CLR button is discussed in section
3-11.2.)
3-11.4 Start and Stop Operation (continued).
The START button initiates the batch se-
quence. Once the unit is started:
a) The display will prompt the operator
with the word STARTED.
b) Both relays will engage (Unless the
Prewarn has been reached already).
c) All buttons on the front panel will be
locked out except the STOP button
and ENT button which
allows ac-
cess to the Grand Totalizer.
NOTE: Once both Prewarn and Preset points
are reached, the unit cannot be started until
it receives a reset signal or the CLR
button is pressed.
The STOP button is used to stop a batch that
has already started. When the STOP button
is pressed:
a) The display will prompt the operator
with the word STOPPED.
b) The Preset and Prewarn relays will de-
energize.
c) The unit will still accept input pulses.
d) All buttons on the front panel will be
usable.
e) The unit may be restarted by pressing
the START button.