21
8
If no adjustment is needed in the X axis, repeat this procedure for the Y-axis using
sides Y1 and Y2.
Adjusting
After checking calibration as described in the previous, follow this procedure if adjust-
ment is required. Be sure not to move the tripod or paper used while checking calibration.
1
Make a calibration reference mark (AX) on wall A as follows:
10mm/0.4in
A2
A1
12mm/0.48in
B1
B2
a.Measure the distance between marks A1 and A2.
Measure the distance between marks B1 and B2.
Add the two distances together. (this is same distance
as determined in step 7)
b.Divide the total by four (4).
c.Starting at mark A2, measure toward mark A1 the dis-
tance calculated in step b above and make a new mark
AX.
EXAMPLE:
A1 to A2 is 10mm (0.4 inch)
B1 to B2 is 12mm (0.48 inch)
Total of both distances is 22mm (0.88 inch)
Divided by 4 equals 5.5mm (0.22 or 3/16 inch)
Mark AX is made 5.5mm (3/16 inch) below A2
Total distance equals 22mm / 0.88 inch
Divided by 4 equals 5.5mm / 0.22 inch
A2
A1
AX
Measure from A2
5.5mm / .22 in (3/16)
and mark AX
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