Closure Error - Topcon DL-501 Instruction Manual

14. CALCULATION FUNCTIONS
14.2

Closure Error

This function calculates the closure error for closed leveling links and closed leveling loops.
A leveling link ties two different bench marks (with known elevation) together by combining multiple
consecutive routes. The start points and end points of a link are different.
A leveling loop, on the other hand, closes on the same bench mark at which it started.
Start point
(Known elevation)
Start point/
End point
1. Select "Calculation" in <Menu>.
2. Select "Closure error" in <Calculation menu>.
3. Press [LIST] to display a list of routes saved in
the current JOB.
Align the cursor with the route you wish to use
and press {}.
60
Leveling link
Leveling loop
C a l c u l a t i o n m e n u
1 . D b l e - r u n d i s c r e p a n c y
2 . C l o s u r e e r r o r
3 . R e o b s . r o u t e m e r g e
R o u t e 0 0 1
R o u t e s e t t i n g
: R 0 0 1
S t a r t p t
: R o u t e - 0 1 - S T 0 0 0 0
L I S T
* R 0 0 1
R 0 0 2
End point
(Known elevation)
L A S T
T O P
O K