Calibration; Calibrating Zero And Span - Rice Lake IQ plus 310A Installation Manual

4 CALIBRATION

4.1 CALIBRATING ZERO AND SPAN

CALIBRT
ZERO
Clear all weight from scale
TARE
(1) Set the Operate/Setup Switch on the rear panel to SETUP
position.
(2) Press PRINT key to scroll right until CALIBRT is displayed.
(3) Using the down arrow (GROSS/NET) key, scroll down once to
display ZERO. If ZERO is not displayed, scroll right until
ZERO is displayed.
(4) Clear the platform of all weight. NOTE: If your calibration procedure requires hooks or
chains to hang test weights on the scale, calibrate the ZERO with the chains or hooks
on the scale.
(5) Press TARE (Enter). The message *CALIB* is displayed, indicating that the IQplus
310A is calibrating ZERO weight (deadload).
(6) When the ZERO calibration is finished, SPAN is displayed, indicating that the unit is
ready to calibrate the SPAN (calibration) weight.
(7) Press the down arrow (GROSS/NET) key once. The number displayed will be the full
scale capacity value (GRADS x DSP DIV). Place certified test weights on the scale. If
the certified test weights equal full scale capacity, skip to step (9).
(8) If the test weight is less than full scale capacity, the displayed number must be ad-
justed to match the test weight value. This can be done using the panel keys as
described in Section 3.2. Adjust the displayed number to match the test weight value.
Note that if the decimal point location has been programmed in the DEC PNT param-
eter, the test weight value must be entered exactly as it will appear with the decimal
point when weighing.
For example, when calibrating a scale for 100.00 lb x .01 lb with a 50-lb test weight,
enter 50.00. If there is no decimal point, or if one or two dummy zeros have been
selected in the DEC PNT parameter, enter the test weight exactly as it will be dis-
played. For example, when calibrating a 100,000-lb x 10-lb scale with a 50,000-lb test
weight, enter 50000.
(9) Press TARE (Enter). The message *CALIB* is displayed, indicating that the SPAN is
being calibrated. (If the displayed number remains and *CALIB* does not appear, it
indicates that you have tried to enter a SPAN value that is outside the scale capacity
as defined by the first four parameters of the SETUP menu).
SPAN
TW SPAN
Load test weights and adjust If Span adjustment is not
displayed value to match load
necessary, return to
OPERATE mode now
UP | DOWN
TARE
RE-ZERO
Remove test weights
from scale and press
TARE to rezero
TARE TARE
Operate Position
Setup Position
25