Rice Lake 120 Digital Weight Indicator - Manual (Page 25)

Calibration 21
4.0 Calibration
The 120 can be calibrated using the front panel, EDP commands, or the Revolution® configuration utility. Each
method consists of the following steps:
• Zero calibration
• Entering the test weight value
• Span calibration
• Optional rezero calibration for test weights using hooks or chains.
The following sections describe the calibration procedure for each of the calibration methods.
WZERO
*CAL*
Display and edit
zero calibration
A/D count value
Display and edit
test weight value
WVAL
*CAL*
Display and edit
span calibration
A/D count value
WSPAN
* CAL*
Press Enter to
remove offset from
zero and span
calibrations
REZERO
VERS DATE TIME PFORMT SERIAL CALIBR CONFIG FORMAT PROGRM
10000
Figure 4-1. Calibration (CALIBR) Menu
4.1 Front Panel Calibration
To calibrate the indicator using the front panel, do the
following:
1. Place the indicator in configuration mode
(display reads CONFIG ) and remove all weight
from the scale platform. If your test weights
require hooks or chains, place the hooks or
chains on the scale for zero calibration.
2. Press until the display reads CALIBR (see
Figure 4-1). Press to go to zero calibration
(
WZERO ).
3. With WZERO displayed, press to calibrate
zero. The indicator displays *CAL* while
calibration is in progress then the display goes
to (
WVAL) .
4. With WVAL displayed, place test weights on
the scale and press to show the test weight
value. Use the procedure shown in Figure 4-2
to enter the actual test weight, then press to
save the value and go to span calibration
(
WSPAN ).
5. With WSPAN displayed, press to calibrate
span. The indicator displays *CAL* while
calibration is in progress, then the display
goes to (
REZERO) .
6. The REZERO function is used to remove a
calibration offset when hooks or chains are
used to hang the test weights.
Note
If no other apparatus was used to hang the
test weights during calibration, remove the
test weights and go to Step 7.
• If hooks or chains were used during
calibration, remove these and the test
weights from the scale. With all weight
removed, press to rezero the scale. This
f u n c t i o n a d j u s t s t h e z e r o a n d s p a n
calibration values. The indicator displays
*CAL* while the zero and span calibrations
are adjusted.
7. Press until the display reads EXIT Y , then
press to exit configuration mode.
When editing numeric values, press to allow numeric mode
change entry, then press or to change the digit selected.
Press or to increment or decrement the value of the flashing
selected digit.
Press to save the value entered and return to the level above.
Figure 4-2. Editing Procedure for Numeric Values