Zero Procedure; Weight Procedure - MERRICK Genetix Safety, Installation, Operation And Maintenance Manual

Zero Procedure

(Main Menu > Calibration > Zero Procedure)
This procedure "zeroes" the feeder calibration, accounting for all the dead load
represented by the suspension, the belt, etc. Selection of this procedure from the
above menu presents a screen that advises you to "Verify belt is empty", and the
current status of the test (0.0%).
Note: The Calibration procedures do not start the belt automatically. Before starting
this procedure you must start the belt and see that it is empty. Also the belt should be
allowed to run for at least 30 minutes if starting from cold.
From this screen, you simply press the Enter key to start the procedure, or the
Menu/Esc key to cancel. Once the procedure is started, the percentage indicator will
begin to increment, and the horizontal progress bar at the bottom of the screen will fill
from left to right.
Once the procedure is complete (100.0%), a new screen will be displayed with the
following data:
Diff [x] 00.00%
Curr: [x] 00.00 lb/ft (or kg/m)
New: [x] 00.00 lb/ft (or kg/m)
Press to Accept test
Press "Menu/Esc" to reject test
Note: The subscript [x] refers to the load cell number, i.e. 1 or 2 (if two load cells are
configured)
The percentage difference ("Diff") is shown on the first line, and represents the
difference between the current Zero Load, and the results of this procedure, relative
to Design Load.
The current Zero Load ("Curr") is shown on the next line.
The new Zero Load ("New" is shown on the third line. This value will become the
current Zero Load if the results of this procedure are accepted.
To accept the results of this procedure, press the Enter key. If you do not wish to
accept the results, and leave the zero value un-changed, press the Menu/Esc key.
Whichever key is pressed at this point, you will be returned to the Zero Procedure
start screen so that you may easily run another procedure if desired. It is
recommended that you run more than one test to verify that the feeder is repeatable.

Weight Procedure

(Main Menu > Calibration > Weight Procedure)
This is one of the available procedures that "span" the feeder calibration, or set its
Scale Factor. Scale Factor is the parameter that relates counts from the Load Cell
A/D (analog to digital) converter to belt load units (i.e. lb/ft or kg/m). Scale Factor will
vary from feeder to feeder, depending on load cell size, weigh span, etc.
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