Note
56
Counterpart Counting Scale Indicator
If you do not want to calibrate span, press Menu to exit.
6. After the
Calibrate
softkey
is pressed, the indicator displays
CALIBRATING
when complete. Press
TARE
(Enter)
or and the
Save Exit
softkey or proceed to
WLIN
.
Note
To view the new AD count, navigate back to the WSPAN, and repeat Step 6; however, instead of pressing the
Calibrate softkey while viewing the value, press Save/Exit to exit.
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 linearization, skip the WLIN parameter; if 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
) and then press
Down
again to show
the weight value prompt (
WGT 1
). Then press
Down
to show the weight value. Place test weights on the scale, and
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, and then press the
Calibrate
softkey to
calibrate the linearization point. When complete, the AD 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 sub-menu.
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, and 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 sub-menu.
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 2.8.1 on page 12 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 3-8 on page 28) 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#
n
command to calibrate zero. The indicator displays
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
<CR>
4. Send the SC.WSPAN#
n
command to calibrate span. The indicator displays
CALIBRATING
while calibration
is in progress.
