Span Calibration - OHAUS Valor 2000 Service Manual

APPENDIX A STANDARD CALIBRATION
A.1.1 Span Calibration
Span calibration uses two calibration points. The first is established with no load on the scale.
The second is established at a load from the Span Calibration Point values in Table 1-1. The
span calibration point is user selectable.
To enter the Calibration menu, press and hold UNIT/Menu until CAL
appears. Press Yes.
SPAN appears. Press YES.
0 flashes. The kg LED is lit to indicate the calibration unit.
With no weight on the pan, press Yes to establish the zero point.
The zero calibration value must be stable and within 20% of the stored
factory zero calibration value.
Note: Outlined characters represent a flashing display.
Note: If the pan is not empty (20% of the factory calibration zero value),
CLEAr PAN flashes for a timeout period of five seconds.
If the load is not stable within ten seconds, or the value is not within the
20% limit, CAL E appears for three seconds and the scale returns to the
weighing mode. The previous user calibration data is used and the
current weight is displayed.
- - C - - appears while the zero point is established.
The span calibration point flashes.
Place the specified calibration weight on the pan and press Yes.
To choose a different span point, press No until the desired value
appears. (See the User Calibration Point Table for available span points.)
The alternate span points are displayed in decreasing order.
Place the specified calibration weight on the pan and press Yes.
- -C - - flashes while the span point is established.
If span calibration was successful, dONE appears for 1.5 seconds.
Then the scale exits to the weighing mode and displays the actual weight
value. (The example shows a 2 kg span weight on the pan.)
Note: Calibration may be aborted at any time by turning the scale off.
NOTE: If calibration fails, ensure that the test area is free from drafts and the surface the scale
rests on is level and free of vibrations. Then try to calibrate again. If it continues to fail, there
may be an internal problem. To resolve internal problems, follow procedures in Chapter 3.
Ohaus Corporation www.ohaus.com A-2 Valor™ 2000 Series Service Manual
CAL
spaN
CLEAr
PAN
CAL E
--C--
--C--
dONE
2.000
-OFF-