Rice Lake 880 Performance Series Indicator/Controller Technical/Service Manual - Manual (Page 63)

Calibration 57
4.0 Calibration
The 880 can be calibrated using the front panel, EDP commands, or Revolution.
Calibration consists of the following steps:
• Zero calibration
• Entering the test weight value
• Span calibration
• Optional five-point linearization
• Optional rezero calibration for test weights using hooks or chains
• Optional last zero calibration
• Optional temporary zero calibration
Note
The
880
requires the WZERO and WSPAN points to be calibrated. The linearity points are optional; they must
fall between zero and span, but must NOT duplicate zero or span. During calibration, TARE acts as a data
entry confirmation key. It also acts as an EXECUTE key, and accepts the value if calibration was successful.
SCALE
....
.... ....
CALIBR
SETUP
.... ....
Display and edit
test weight value
WVAL WLIN
POINT1
Same as POINT 1
REZERO
Calibrating, please wait
Press Enter to
compensate for
zero offset
WGT 1
WZERO
Calibrating, please wait
Press Enter
to calibrate zero
Press Menu
to cancel
Previous A/D raw
counts are shown
CAL1
POINT2 POINT3 POINT4 POINT5
WSPAN
Calibrating, please wait
Press Enter
to calibrate span
Press Menu
to cancel
Previous A/D raw
counts are shown
LAST
Calibrating, please wait
Press enter to recall
the last established
pushbutton zero value
to allow calibration
without removing test
weights from the scale.
TEMP
Calibrating, please wait
Press enter to
temporarily zero the
displayed weight of a
non-empty scale.
After span calibration
the previously
calibrated zero value
is used as the offset.
Calibrating, please wait
Press Enter
to calibrate span
Press Menu
to cancel
Previous A/D raw
counts are shown
Display and edit
test weight value
See Section 4.2
See Section 4.3
Figure 4-1. Calibration (CALIBR) Menu