GSE 60 SERIES Technical Reference Manual page 393

This command operates similar to performing a "Zero Only" calibration.
For example, if 100 kg of dead-load was added to a scale platform, the
command
100A%z
increases the calibrated zero reference by 100 kg to compensate for the
dead-load. This change in the zero reference is permanent, even in the
event of a power loss. The original calibrated zero reference can be
restored with the command
0A%z
The Absolute Zero command always uses the original calibrated zero
reference established when adding or subtracting an absolute value. Thus
the original zero reference can always be restored.
Relative Zero
< value > R%z
Adjusts the re-zero reference by adding or subtracting an offset value.
5R%z Increases the re-zero reference by 5 units.
-1R%z Decreases the re-zero reference by 1 unit.
0R%z Does not change the re-zero reference.
This command operates similar to the zero tracking feature. Subsequent
Relative Zero commands have a cumulative effect on the displayed zero
reference. Changes to the re-zero weight are permanent, even in the
event of a power loss. For example, if the [ZERO] key is pressed to
establish a displayed gross weight of zero (0), then the command
10R%z
results in a displayed gross weight of –10. Issuing this command a
second time results in a displayed gross weight of –20.
The Relative Zero command can be used to make changes to the re-zero
reference in dynamic applications such as conveyor belt scales. Here, the
zero reference is not an instantaneous value, rather it is an average of the
dead-load of the conveyor belt over it's entire length. The average weight
of the belt could be acquired using the %+ Averaging command. The
average zero value could then be assigned as the Relative Zero value
15.1P%oR%z
This process could be repeated as desired to incorporate a dynamic zero-
tracking routine for the conveyor belt.
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60 Series Technical Reference Manual
Macros 9-145