Rice Lake Static Weighing - Manual (Page 41)

Calibration 37
0 0 0 0 0 0
When editing numeric values, press or to change the selected digit
Press or to increment or decrement the value of the selected digit
If not already on the screen, the decimal point will flash on the far right.
To move the decimal, press Enter, then use or to move the decimal
position. Press Enter when done.
Figure 4-2. Editing Procedure for Numeric Values
9. 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 linearization, skip the
WLIN parameter;
if linearization values have previously been
entered, these values are reset to zero during
calibration. To perform linearization, follow
the procedure below.
Note
The linearity points must be less than the
WSPAN point.
• With WLIN displayed, Press to go to the
first linearization point ( PT-> 1 ).
• Place test weights on the scale and press
Enter .
• Use the procedure shown in Figure 4-2 to
enter the actual test weight value.The
indicator will display
Press Enter Key to
Calibrate WLIN .
• Press Enter to calibrate. The indicator
displays Calibrating, Please Wait while
calibration is in progress. When complete,
the A/D count for the linear calibration is
displayed. Press
Enter again to advance to
the next prompt ( PT-> 2 ).
• Repeat for up to five linearization points.
To exit the linearization parameters, press
to return to WLIN .
10. 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.
• With REZERO displayed, press Enter or
to access the rezero function.
• If hooks or chains were used during
calibration, remove these and the test
weights from the scale. The indicator will
display
Press Enter Key to REZERO .
• With all weight removed, press Enter to
rezero the scale. This function adjusts the
zero and span calibration values. The
indicator displays
Calibrating, Please Wait
while the zero and span calibrations are
adjusted. When complete, the adjusted A/
D c o u n t f o r t h e z e r o c a l i b r a t i o n i s
displayed. Press
Enter , then press to
return to the CALIBR menu.
11. Press or the Menu button to return to weigh
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 2.7.1 on page 8 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 CONFIG - see Figure 3-5 on page 18)
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 SC.WZERO command to calibrate
zero. The indicator displays CALIBRATING,
PLEASE WAIT while calibration is in progress.
3. Place test weights on the scale and use the
SC.WVAL command to enter the test weight
value in the following format:
SC.WVAL=nnnnnn
4. Send the SC.WSPAN command to calibrate
span. The indicator displays CALIBRATING,
PLEASE WAIT 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 command sets the test
weight value (nnnnn) for linearization point 1.
The SC.WLIN.C1 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
S C . R E Z E R O c o m m a n d . T h e i n d i c a t o r
displays
CALIBRATING, PLEASE WAIT while the
zero and span calibrations are adjusted.
7. Send the SC.KUPARROW or SC.KEXIT EDP
command to return to normal mode.