Rice Lake Counterpart Configurable Counting Indicator - User Manual - Version 2.2 - Manual (Page 56)

50 Counterpart User Manual
4.2 Five-point linearization
Five-point linearization (using the WLIN parameter)
provides increased scale accuracy by calibrating the
indicator at up to five additional points between the
zero and span calibrations.
Linearization is optional: if you choose not to perform
l i n e a r i z a t i o n , s k i p t h e W L I N p a r a m e t e r ; i f
linearization values have previously been entered,
these values are reset to zero during calibration.
WZERO and WSPAN must be calibrated before
adding linearization points; WLIN values must be less
than the WSPAN value and must not duplicate
WZERO or WSPAN.
To perform linearization, follow the procedure below:
With WLIN displayed, Press down to go to the first
linearization point ( POINT 1 ). Press down again to
show the weight value prompt ( WGT 1 ), then down
once more to show the weight value. Place test
weights on the scale, then use the numeric keypad to
enter the actual test weight value. Press
enter to save
the value and move to the calibration ( CAL 1 ) prompt.
Press down to show the current calibration value, then
press the Calibrate softkey to calibrate the linearization
point. When complete, the A/D count for the linear
calibration is displayed. Press
enter again to save the
calibration value and go to the next prompt ( POINT 2 ).
Repeat for up to five linearization points. To exit the
linearization parameters, press the
up key to return to
WLIN.
4.3 Rezero
The optional rezero function is used to remove a
calibration offset when hooks or chains are used to
hang the test weights.
NOTE: The rezero function cannot be used with
five-point linear calibration.
If no other apparatus was used to hang the test weights
during calibration, remove the test weights and press
up to return to the CALIBR submenu.
If hooks or chains were used during calibration,
remove these and the test weights from the scale. With
all weight removed, go to the REZERO parameter,
then press
down to show the current zero value. Press
the Calibrate softkey to adjust the zero and span
calibration values. Press enter or up to return to the
CALIBR submenu.
Press up to return to the SCALES menu, or press the
Save and Exit softkey to exit setup mode.
4.4 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 2.7.1 on page 9 for
EDP port pin assignments.
Once the indicator is connected to the sending device,
do the following:
1. Place the indicator in config mode (display
must read SCALE - see Figure 3-6 on page 23)
a n d r e m o v e a l l w e i g h t f r o m t h e s c a l e
platform. If your test weights require hooks or
chains, place the hooks or chains on the scale
for zero calibration.
2. Send the SC.WZERO#n command to
c a l i b r a t e z e r o . T h e i n d i c a t o r d i s p l a y s
CALIBRATING while calibration is in progress.
3. Place test weights on the scale and use the
SC.WVAL#n command to enter the test
weight value in the following format:
SC.WVAL=nnnnnn
4. Send the SC.WSPAN#n command to calibrate
span. The indicator displays CALIBRATING
while calibration is in progress.
5. Up to five linearization points can be
c a l i b r a t e d b e t w e e n t h e z e r o a n d s p a n
c a l i b r a t i o n v a l u e s . U s e t h e f o l l o w i n g
commands to set and calibrate a single
linearization point:
SC.WLIN.V1=nnnnn
SC.WLIN.C1
The SC.WLIN.V1#n command sets the test
weight value (nnnnn) for linearization point 1.
The SC.WLIN.C1#n command calibrates the
point. Repeat using the SC.WLIN.Vx and
SC.WLIN.Cx commands as required for
additional linearization points.
6. To remove an offset value, clear all weight
from the scale, including hooks or chains used
t o h a n g t e s t w e i g h t s , t h e n s e n d t h e
SC.REZERO#n command. The indicator
displays
CALIBRATING while the zero and span
calibrations are adjusted.
7. Send the SC.KUPARROW#n or
SC.KEXIT#n EDP command to return to
normal mode.