OHAUS T71P, Service Manual

Page: 21 / 48

CHAPTER 1
GETTING STARTED
7000 Series T71 Indicator Service Manual 1-15 Ohaus Corporation www.ohaus.com
3LIN
kg
10
3LIN
lb
5
3LIN
kg
5
3LIN
lb
--C--
3LIN
lb
2.5
0.000
lb
3LIN
lb
DONE
3LIN
lb
--C--
3LIN
lb
0
3LIN
lb
--C--
CAL
3 PT LINEAR
1.8.3 3-point 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.
Press and hold TARE/Menu until LFT OFF flashes and CALIBRATION
appears. Press Yes . CAL ZERO appears. Press No .
CAL SPAN appears. Press No . 3 PT LINEAR appears.
With no load on the scale, press Yes . The display shows the current full
load calibration point and calibration unit of measure.
Note : To change the full load calibration point, press No and enter the
desired value using the keypad. Then press Yes .
To change the calibration unit of measure, press No to alternate
between kg and lb.
Place the specified full load calibration weight on the scale and press
Yes . The display shows --C-- , followed by the 1/2 load calibration point.
Place the specified 1/2 load calibration weight on the scale and press
Yes . The display shows --C-- , followed by the zero calibration point.
With no load on the scale, press Yes . The display shows --C-- , then
DONE , and returns to the current application mode.