Absolute Check-Weighing - GSE 370 Technical Reference Manual

Changing Targets From The Weigh Mode (Both)
When Both is configured in the setpoint setup, Targ 1 and Targ 2 automatically become available
modes for the [SELECT] key. An entry followed by [TARE] or [SAMPLE] changes the currently
viewed target. Pressing [TARE] or [SAMPLE] alone allows access to the subsets. PA 1 is the
subset for Targ 1 and PA 2 is the subset for Targ 2.
Pre-acts 1 and 2 are always available as subsets of their respective targets from the Weigh
Mode.
Since the discharge portion of the Both cycle is a loss-in-weight operation, target 2 and pre-act 2
entries are entered as positive values and interpreted by the Model 370/375 as negative. See
Changing Targets from the Weigh Mode (General) on page 38 for detailed instructions on
changing target values from the Weigh Mode.
Example (Both)
With a system set up to fill a weigh vessel with 2000 lbs. of paint and to meter out the paint in 45
lb buckets, the following settings might be used:
Parameter Setting
Targ 1 = 2000
Based = Net
PA 1 = 5
Learn 1 = Enabled
Start 1 = [TARE]
Targ 2 = 45
PA 2 = 5
Learn 2 = Enabled
Start 2 = [TARE]
Pause = None
A C
BSOLUTE HECK
This program is commonly used for check-weigh applications. Upper and lower tolerances are
entered as absolute values and provide an accept window in between the low and high values.
Over and Under tolerances are also entered as absolute values. The desired target may be
based on gross weight, net weight, or quantity (if counting is enabled). Only the annunciators will
light to indicate the setpoint status.
Table 3-10: Setpoint Setup (Absolute Check-Weighing)
Setpoint Selection
P5100.6
P5102.--
P5103.--
P5104.0
See Key-In Parameters on page 18 for instructions on using the front panel keys for entering
data.
Activation Method (Absolute Check-Weighing)
In order for the annunciators or setpoints to activate, the displayed value must be at least five
graduations above zero. A setpoint option board may be installed to allow the Model 370/375 to
directly control lights, buzzers, drop-gates, or reject devices.
Actual Cutoff Value
2000 – 5 = 1995
0 – 45 = (-45)
45 – 5 = 40
0 – 40 = (-40)
-W
EIGHING
Function
ChecA
TargL
TargH
Based
46
Comments
Desired vessel fill target.
Targets are compared to net weight.
Fill valve closes at 1995 lbs.
Analyze five previous fills and auto-adjust pre-act 1.
Start fill with remote key closure.
Desired discharge target (decreasing weight from a net zero:
enter as a positive value).
Discharge valve closes at
(-40) lbs. (decreasing weight from a net zero: enter as a positive
value).
Analyze five previous discharges and auto-adjust pre-act 2.
Start discharge with [TARE].
Disable pause function.
Description
Check-weigh by absolute value.
Low acceptance value.
High acceptance value.
Select from Net, Gross or Count (Quantity).