Rice Lake Legend 480-2A, Technical Manual

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48 480 Legend Series
4.4 More About Calibration
The following provides additional information about
WVAL
and how to manually tweak a calibration up or down.
WVAL
When a WVAL number is entered that uses a decimal point, the value will be rounded when displayed.
Example:
A precision value such as 2455.23 is entered by the operator, but when the operator returns to the WVAL
display, the number is rounded to 2455. A higher precision value can be entered for WVAL when the Display
division is greater than 1, such as X2, X5 or X10.
Millivolt Values
Zero
is the dead weight millivolt value and
Span
is the test weight millivolt value, so the total millivolts equals
Zero
plus
Span
.
4.4.1 Adjusting Final Calibration
Calibration may be affected by environmental factors including wind, vibration and angular loading.
Example:
A strain test may determine that at 2000 lb the calibration is 2 lb high. In this case, final calibration can be
tweaked by changing WVAL to 999 lb. This adjustment provides a linear correction of 1 lb per 1000 lb.
To adjust the final calibration, return to the
WVAL
prompt and press to show the test weight value. Press or
to adjust calibration up or down. Press to save the value. Press to return to the CALIBR menu.