Rice Lake SURVIVOR 420HE Hostile Environment - Installation Manual - Manual (Page 31)

420HE Installation Manual - Calibration 27
4.0 Calibration
The 420HE 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.
XXXXXXX XXXXXXX XXXXXXX XXXXXXX
WZERO WV AL WSPAN
ALGOUT DIGI N SETPNT PROGRM PFORMT SERIAL CALIBR CONFIG FORMAT
REZERO
VERS
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 setup 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. When complete, the
A/D count for the zero calibration is displayed.
DO NOT adjust this value after WSPAN has
been set! Press again to save the zero
calibration value and go to the next prompt
(
WVAL ).
4. With WVAL displayed, press to show the
stored calibration weight. Use the procedure
shown in Figure 3-4 15 to enter the actual
value of the test weights to be used for the span
calibration. Press to store the entered
WVAL
value and go to span calibration ( WSPAN ).
5. With WSPAN displayed, place test weights on
the scale and press to calibrate span. The
indicator displays
*CAL* while calibration is in
progress. When complete, the A/D count for
the span clibration is displayed. Press again
to store the span calibration value and go to the
next prompt (
REZERO ).
6. The rezero function is used to remove a
calibration offset when hooks or chains are
used to hang the test weights.
• If no other apparatus was used to hang the test
weights during calibration, remove the test
weights and press to return to the CALIBR
menu.
• 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 function adjusts the
zero and span calibration values. The indicator
d i s p l a y s
* C A L * w h i l e t h e z e r o a n d sp a n
calibrations are adjusted. When complete, the
adjusted A/D count for the zero calibration is
displayed. Press to save the value, then press
to return to the CALIBR menu.
7. Press until the display reads CONFIG , then
press to exit setup mode.
4.2 EDP Command Calibration
To calibrate the indicator using EDP commands, the
indicator EDP port must be connected to a terminal or
personal computer. See Section 2.3.3 on page 8 for
EDP port pin assignments; see Section 5.0 on page 29
for more information about using EDP commands.
Once the indicator is connected to the sending device,
do the following:
1. Place the indicator in setup 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. Send the WZERO EDP command to calibrate
zero. The indicator displays *CAL* while
calibration is in progress.