Topcon LN-100 - Calculation and Assessment of Accuracy

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7. CHECK
Measurement results recording table:
 Calculation
Obtain the distance error (ED) and the vertical error (EZ) from the following formulas:
 Assessment
Confirm that the distance error (ED) and the vertical error (EZ) fall within the following ranges:
• Distance error
-6 (mm) < ED < +6 (mm)
• Vertical error
-11.6 (mm) < EZ < +11.6 (mm)

• If the error falls out of the range, contact your local dealer.
Instrument point Target X [m] Y [m] Z [m]
1
a
X
1,a :
Y
1,a :
Z
1,a :
b
X
1,b :
Y
1,b :
Z
1,b :
2
a
X
2,a :
Y
2,a :
Z
2,a :
b
X
2,b :
Y
2,b :
Z
2,b :
D
1
X
1 a,
X
1 b,
–()
2
Y
1 a,
Y
1 b,
–()
2
+=
D
2
X
2 a,
X
2 b,
–()
2
Y
2 a,
Y
2 b,
–()
2
+=
Z
1
Z
1 a,
Z
1 b,
–=
Z
2
Z
2 a,
Z
2 b,
–=
ED mm[]
D
1
D
2
–()
2
------------------------
1000×=
EZ mm[] Z
2
Z
1
–()1000×=