AW Gear Meters LLC-BA - Manual (Page 17)

LLC-BA Batch Unit
Operation and Programming Manual
16
RUN Mode
In the RUN Mode, the external batch functions inputs are active. (See the Connection Diagram on page
12.) Two keys are active on the front panel:

the MODE key (UP) changes the display

BATCH (SEL) starts or stops a batch
Batch Operation
When you press START or BATCH, the LLC-BA initiates and then stops flow when the batch quantity is
reached. You can select one of nine programmable batches using “Batch Select.”
The RELAY outputs control two solenoids with different flow rates to allow for a slow stop/start of the
flow. In a typical batch cycle:
1. Pressing START (or the BATCH key [SEL]) activates the low flow solenoid. When the (user
programmed) DELAY time is reached, the RELAY2 Output (high flow solenoid) activates. These
two actions together produce a combined high flow rate.
2. RELAY2 Output (high flow solenoid) deactivates before the batch quantity is reached by means
of the PRECUT variable reducing the flow for a slow stop.
3. RELAY1 (the low flow solenoid) deactivates when the programmed batch quantity is reached.
Automatic Overrun Compensation
The de-activation of RELAY1 is under the influence of the Automatic Overrun Compensation (AOC)
feature that compensates for a valve or fluid delay in the batch system. For example, if a valve with a .5
second reaction delay is used on a 1000cc batch, the first quantity delivered is approximately 1020cc,
depending on flow rate.
The AOC feature detects this overrun and the LLC-BA anticipates and corrects for the delay on the next
batch. The feature is always active and adapting continuously to correct for long term changes in valve
and fluid characteristics.
Batch Selection/Activation
While in the RUN mode, use BATCH SELECT to select and activate a batch number 1- 9. Close and hold
the input to select a batch number. On each closure, the batch number increments by one. The display
reads SEL B# 000xx.xx to indicate the current batch number and quantity. Releasing the input activates
the Batch selection and returns the display to the Display Mode. Repeat until the desired batch displays.
You cannot select or activate batch numbers with a zero quantity. The BATCH SELECT advances to the
next batch with a non-zero quantity.
Notice