APPENDIX B SERVICE CALIBRATION
Ranger
™
3000 Series Service Manual
B-3
Ohaus Corporation www.ohaus.com
B.6 Service Linearity Calibration
This calibration method uses three points. The full-calibration point is established with a weight
on the scale. The mid-calibration point is established with a weight equal to half of the full
calibration weight on the scale. The zero calibration point is established with no weight on the
scale. The mid-calibration points cannot be altered by the user during the calibration procedure.
When
LIN
appears, press
YES
to accept the Service Linearity Calibration
menu, or
No
to advance to the Ramp menu item.
LIN
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.
(Outlined characters represent a flashing display.)
- - C - -
flashes while the zero point is established.
--C--
The mid calibration point value flashes. The
kg
LED is lit to indicate the
calibration unit. (The example shows the mid calibration point value for a
Scale Capacity of 3 kg.)
Place the specified calibration weight on the pan and press
Yes
.
- - C - -
flashes while the mid point is established.
--C--
The full calibration point value flashes. The
kg
LED is lit to indicate the
calibration unit. (The example shows the full calibration point value for a
Scale Capacity of 3 kg.)
Place the specified calibration weight on the pan and press
Yes
.
- - C - -
flashes while the full point is established.
--C--
If linearity calibration was successful, the scale will exit the service menu
and enter weighing mode.
(The example shows a 3 kg span weight on the pan.)
3.000
If linearity calibration was successful,
S.End
appears.
Press
YES
to exit the Service menu and return to the weighing mode,
or
NO
to return to the first Service menu item.
End
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.
