5.1 Calibration 5.1
Calibrating the Vertical scale
NOTE: The Vertical rules can be identified from the Squaring arm rule by the
orientation of the printed measurements – see diagram.
1. Trim the bottom scale at zero and 120.5cm (47
1
/
2") with scissors.
2. Remove the paper backing tape and carefully place the Rule adjacent to its groove
in the Main body and with the zero end resting inside the material channel of the
Squaring arm. When aligned stick the Rule in its groove.
3. Again trim the Rule at the bottom end as shown.
4. Trim the Rule extension to 120.5cm (47
1
/2") and stick it in place above the
previous Rule.
5. Trim the top of the Rule extension as shown.
120.5cm (47
1
/2")
120.5cm (47
1
/2")
0 - ZERO
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