Rice Lake iQUBE2 Digital Diagnostic Junction Box - Manual (Page 38)

34 iQUBE 2 Installation Manual
4.1.1 Front Panel Calibration
From the 920i front panel, a theoretical, 2-point, or Cal-Match calibration can be performed. Calibration is per-
formed in real-time with each button press.
Theoretical Calibration
To perform a theoretical calibration, ensure the scale is empty and navigate to the
Theoretical Calibration parameter
(see Figure 4-1). Then, press the Calibrate softkey. The dead load value is captured and the cells trimmed based on
the capacity and sensitivity values entered for the cells. Scale capacity is set at the total of the load cell capacities.
2-Point Calibration
2-point calibration is used for traditional scale calibration where load cells will not be trimmed.
To perform a 2-point calibration,
1. Navigate to the CALIB menu, then select 2-POINT .
2. Press ENTER or DOWN ( ) to go to the WZero submenu.
3. Ensure there is no weight on the scale, then press the Calibrate softkey to calibrate WZero. Or, press one of
the softkeys described below.
4. Press ENTER to accept the value and move to the next prompt ( WVAL ).
5. With WVAL displayed, press ENTER or DOWN ( ) to view the stored test weight value. Use the numeric key-
pad to enter the desired value.
6. Press ENTER to advance to WSPAN.
7. With WSPAN displayed, press ENTER or DOWN to view the A/D count. Place test weights on the scale equal
to WVAL. Press the CALIBRATION softkey to calibrate WSPAN.
8. Press ENTER to accept the value. Basic calibration is complete.
9. Press the Save and Exit softkey to return to weigh mode. To continue with linearization, see Section 4.1.2.
Cal-Match ® Calibration (Corner, Section)
Cal-Match calibration can be performed using a vehicle as the test weight, but a smaller footprint and heavier
weight value will often yield better results. Mechanical characteristics of the scale may prevent Cal-Match from
automatically computing load cell trim factors. To perform a Cal-Match calibration,
1. Navigate to the CALIB submenu. Select which calibration type to use: CORNER or SECTION .
2. Press ENTER or UP ( ) to go to the WVAL menu.
3. Press ENTER or DOWN ( ) to view the stored test weight value. Use the numeric keypad to enter the desired
value. Press ENTER to accept the value and advance to Cal-Match.
CALIB Menu
Level 4 Submenus
Menu Description
THEORET Provides access to perform a theoretical calibration, which mathematically calibrates the scale using load
cell sensitivities, and setting full scale capacity based on the sum of the load cell capacities.
WZERO Provides access to perform a traditional zero calibration for a 2-Point scale. Advanced options are also
available. See Section 4.1.2 on page 35)
WVAL Provides access to display and edit the test weight value.
WSPAN Provides access to display, calibrate and edit the traditional span calibration value for a 2-Point scale.
CALZERO
Advanced options for specifying an alternative zero source for a Cal-Match ®
scale.
CALSPAN Provides access to perform an optional, final span calibration on a trimmed scale.
WLIN
POINT 1 -
POINT 5 Provides access to test weight and calibration values for up to five linearization Provides access to test
weight and calibration values for up to five linearization points. Perform linear calibration only after Zero and
Span calibration points have been set. See Section 4.1.2 on page 35 for more information about
linearization.
REZERO Provides access to perform an optional, final zero calibration, which removes an offset value from the zero
and span calibration values.
Table 4-2. CALIB menu parameters