Thermo Ramsey - Hoferick Engineering GmbH

Appendix E
Multi-Point Calibration
This appendix contains setup and calibration menus for establishing multiple
calibration factors, both zero and span, for the weigh system.
Variations in conveyor belt tensions affect the accuracy capabilities of a
conveyor belt scale. Causes of these variations may be the use of a reversing
belt, multiple feed points, or multiple products being conveyed that have a
significant difference in belt density.
To compensate for these changes in the system operation, and to maintain
weighing accuracy under varying mechanical influences, different calibration
factors may be used.
Up to 10 different calibration points are possible. Each calibration point has its
own zero number, span number, and Linearization table. To configure the
Linearization table, refer to REC 3909. The different calibration points are
accessible through the front panel keyboard or via a digital input. When a
calibration number is selected, all of its associated values immediately become
active.
E.1. Define Number of Calibration Points
During the initial programming (cold start) of the Integrator, a theoretical zero
and span are computed and applied to all of the calibration points. From this
point on, any zero or span calibration performed changes only the currently
active calibration point.
Enabling multiple calibration points is performed at the CAL DATA SCROLL.
Use the following steps to enable multiple calibration points.
1. Select MENU
2. Select MENU
3. Select CALIB
4. Select DATA
5. Scroll down until the following screen displays:
Default: 1
Min: 1
Max: 10
-- CAL DATA SCROLL 14 --
Number of calib.
1
ENTER
Password:
Operator
Thermo Fisher Scientifc Minor Calibration
REC 4175 Rev B
E-1