Rice Lake TradeRoute HL Series - Installation and Service Manual (Legal-for-Trade) - Manual (Page 34)

30 Trade Route Installation Manual
3.4 Calibration
The CALIBR submenu (under the SCALES menu, see Figure 3-6) is used to calibrate the 920i. The zero, span, and
linear calibration point displays provide a set of softkeys used specifically for calibration procedures:
+/–
Toggles to allow entry of negative or positive values.
Last Zero
Recalls the last established zero value to allow calibration without removing tests weights or product
from scale.
Calibrate
Performs calibration for the selected point.
Temp Zero
Temporarily zeroes the displayed weight of a non-empty scale. After span calibration, the difference
between the temp zero and the previously calibrated zero value is used as an offset.
Millivolts
(or
Counts
)
Toggles between display of captured A/D counts and captured millivolts values; allows entry of
calibration values in mV or counts.
07/14/2006 01:57PM
Calibrate
WZERO WVAL REZERO
1291
Deadload Calibration
+/- Millivolts
Zero Count =>
Last Zero Temp Zero
CALIBR
SCALE1
SCALES
Figure 3-6. WZERO Calibration Display
To calibrate the indicator using the front panel:
1. Place the indicator in setup mode (display reads
Scale Configuration
) 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. With the
SCALES
menu highlighted, press and select the scale to be calibrated.
3. Press again (
GRADS
parameter highlighted).
4. Press left to highlight the
CALIBR
submenu.
5. Press to go to zero calibration (
WZERO
). See Figure 3-6.
6. Ensure scale is empty and press again to show the current WZERO value.
7. Press the
Calibrate
softkey to calibrate zero. When complete, the new A/D count for the zero calibration is
displayed.
8. Press to save the zero calibration value and go to the next prompt (
WVAL
).
9. With
WVAL
displayed, press to show the stored calibration weight value.