Rice Lake CB-2 Concrete Batch Controller Version 1.0 - Manual (Page 39)

Calibration 35
5.0 Calibration
The 920i can be calibrated using the front panel, serial commands, or iRev . Each method consists of the following
steps:
• Zero calibration
• Entering the test weight value
• Span calibration
• Optional five-point linearization
• Optional rezero calibration for test weights using hooks or chains
The following sections describe the calibration procedure for each of the calibration methods.
Figure 5-1. Calibration (CALIBR) Submenu
5.1 Gravity Compensation
Gravity compensation for latitude and elevation is available for the
920i
. To calibrate with gravity compensation,
the LOCALE parameter under the FEATURE menu must be set ON, and the LATUDE (latitude) and ELEVAT
(elevation, in meters) parameters set before calibrating the indicator.
If the indicator is later installed at a different location, gravity compensation can be applied to a pre-calibrated
indicator by adjusting the LATUDE and ELEVAT parameters.
5.2 Front Panel Calibration
The CALIBR submenu (under the SCALES menu,
see Figure 5-2) is used to calibrate the
920i
. The zero,
span, and linear calibration point displays provide a
set of softkeys used specifically for calibration
procedures:
Default
Restores the value to its default
+/–
Toggles to allow entry of negative or
positive values
Calibrate
Performs calibration for the selected
point
Millivolts
(or
Counts
)
Toggles between display of captured A/
D counts and captured millivolts
values; allows entry of calibration
values in mV or counts
Restore
Restores the value to the previously
saved value
Figure 5-2. WZERO Calibration Display
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