Rice Lake TradeRoute HL Series - Installation and Service Manual (Legal-for-Trade) - Manual (Page 35)

920i® Electronic Weigh Center 31
10. Use the numeric keypad to enter the actual value of the calibration test weights and press to save the
value and go to span calibration (
WSPAN
).
11. Place test weights on scale.
12. Press
again to show the current WSPAN value.
13. Press the
Calibrate
softkey to calibrate span. When complete, the new A/D count for the span calibration is
displayed.
14. Press again to save the span calibration value and go to the next prompt (
WLIN
).
Five-Point Linearization (Using the WLIN Parameter)
This provides increased scale accuracy by calibrating the indicator at up to five additional points between the zero
and span calibrations.
Note
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:
1. With
WLIN
displayed, press
down
to go to the first linearization point (
POINT 1
).
2. Press again to show the weight value prompt (
WGT 1
).
3. Press once more to show the weight value.
4. Place test weights on the scale; use the numeric keypad to enter the actual test weight value.
5. Press to save the value and move to the calibration (
CAL 1
) prompt.
6. Press to show the current calibration value.
7. Press the
Calibrate
softkey to calibrate the linearization point. When complete, the A/D count for the linear
calibration is displayed.
8. Press again to save the calibration value and go to the next prompt (
POINT 2
).
9. Repeat for up to five linearization points.
10. To exit the linearization parameters, press
to return to
WLIN
.
Re-zero Function
The optional re-zero function is used to remove a calibration offset when hooks or chains are used to hang the test
weights.
Note
Note
The re-zero 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
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 and press to show the current zero value. Press
the
Calibrate
softkey to adjust the zero and span calibration values. Press or to return to the
CALIBR
submenu.
Press to return to the SCALES menu, or press the Save and Exit softkey to exit setup mode.