Rice Lake Static Weighing - Manual (Page 42)

38 CW-90/90X Checkweigher
4.3 Revolution ® Calibration
To calibrate the indicator using Revolution, the
indicator EDP port must be connected to a PC running
the Revolution configuration utility.
1. Place the indicator in config mode (display
reads CONFIG, see Figure 3-5 on page 18) and
remove all weight from the scale platform.
2. From Revolution, select File » New .

The Select Indicator dialog box appears.
3. Select CW-90 and click OK .
4. From the Communications menu, select
Connect .
5. From the left pane, expand the Scale selection
and click the Scale button.
Figure 4-3. Scale Button
6. From the Tools menu, select Calibration Wizard .
7. Click NEXT to begin the Calibration Wizard.
8. Select whether you want to perform a standard
calibration or a standard with multi-point
linearization and click
NEXT .
9. In the text box, enter the test weight value be
used for span calibration.
10. Select the checkbox if you are using chains or
hooks during the calibration, then click NEXT.
11. Remove all weight from the scale and click
Click to Calibrate Zero to begin zero calibration.
If your test weights require hooks or chains,
place them on the scale for zero calibration.
12. When zero calibration is complete, the
Calibration Wizard prompts you to place test
weights on the scale. Place the test weights on
the scale, then click
Click to Calibrate Span .
13. If you chose to perform linear calibration, the
Calibration Wizard now displays prompts
(1–5). Enter the weight value for Linear Point
#1, place test weights on scale and click
GO .
Repeat for additional linearization points, then
click
NEXT .
14. The new and old calibration settings are
displayed. To accept the new values, click
Finish . To exit and restore the old values, click
Cancel .
4.4 More About Calibration
The following topics provide additional information about
compensating for environmental factors (Section 4.4.1)
and diagnostic information for determining expected zero
and span coefficients.
4.4.1 Adjusting Final Calibration
Calibration may be affected by environmental factors
including wind, vibration, and angular loading. For
example, if the scale is calibrated with 1000 lb, a strain
test may determine that at 2000 lb the calibration is 3 lb
high. In this case, final calibration can be adjusted by
tweaking WVAL to 998.5 lb. This adjustment provides
a linear correction of 1.5 lb per 1000 lb.
To adjust the final calibration, return to the WVAL
prompt and press ENTER to show the test weight value.
Press or to adjust calibration up or down. Press
ENTER to save the value, then press to return to the
CALIBR menu.