11-1
11 SETTING THE PRISM CONSTANT VALUE
11
SETTING THE PRISM CONSTANT VALUE
The prism constant value of Topcon is set to zero. When using prisms other than Topcon’s, it is
necessary to set the prism constant correction value of that specific prism.
Once you set the correction value for prism constant, it is retained after power is OFF.
•
Confirm the non-prism constant value is set at 0 when measuring target such as walls in Non-prism
mode.
Prism constant correction
Reflective prisms each have their prism constant.
Set the prism constant correction value of the reflective prism you are using. The prism constant
correction value is a value that the prism constant is inverted to positive or negative. (E.g. if the
prism constant is 40 mm, the correction value turns to -40 mm.)
Operating procedure
Operation
Display
1
Press the
{F4}
key to get the soft key page 2 in the
distance measurement mode or page 3 in the
coordinate measurement.
{F4}
2
Press the
{F3}
(S/A).
{F3}
3
Press the
{F1}
(PRISM) key.
{F1}
4
Input prism constant correction value. Press
{F4}
(ENT) to move to the next item.
PRISM: Prism Constant Correction Value
N_PSM: Non-prism Constant Correction Value
SHEET: Sheet Constant Correction Value
When all the values are set, previous screen is
restored.
Enter value
{F4}
*1)
Refer to Section 2.4 “How to Enter Alphanumeric Characters”.
Input range: –99.9 mm to 99.9 mm,0.1 mm step.
HR: 120°30'40"
HD* 123.456 m
VD: 5.678 m
MEAS MODE NP/P P1
↓
OFSET S.O S/A P2
↓
PSM:0.0 PPM 0.0
NPM:0.0 SHT: 0.0
SIGNAL:[
IIIII
]
PRISM PPM T-P –––
PRISM
=
0.0 mm
N
_
PSM
:
0.0 mm
SHEET : 0.0 mm
––– ––– [CLR][ENT]
PRISM
:
14.0 mm
N
_
PSM
=
0.0 mm
SHEET : 0.0 mm
––– ––– [CLR][ENT]
PSM:14.0 PPM 0.0
NPM:0.0 SHT: 0.0
SIGNAL:[
IIIII
]
PRISM PPM T-P –––
