Topcon GPT-7502 User Manual

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7 SETTING THE PRISM / NON-PRISM CONSTANT CORRECTION VALUE
7 SETTING THE PRISM / NON-PRISM CONSTANT
CORRECTION 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.
[Example]
• How to Set Prism Constant Value
Note: Confirm the non-prism constant value is set at 0 when measuring target such as walls in
Non-prism mode/Non-prism long mode.
Prism name Prism constant value Prism constant correction value
General Topcon prism 0mm 0mm
Pinpole prism set L1
Pinpole prism holder L1
+22mm or 0mm -22mm or 0mm
Prism unit A2 -14mm +14mm
Prism unit A5 -18mm +18mm
Prism unit A6 0mm 0mm
Prism unit A7 +2mm -2mm
1 Turn the power switch on.
2 Press the [ ] key.
3 Press the
[Prism constant value, Atmospheric correction]
icon.
4 Press the [Prism constant value] icon.
[Prism constant value] icon
[Prism constant value, Atmospheric correction] icon
[Non-Prism constant value] icon

Topcon GPT-7502 Specifications

General

Brand	Topcon
Model	GPT-7502
Category	Measuring Instruments
Language	English