2 PREPARATION FOR MEASUREMENT
2-10
2.11 Inclination of Prism and Measuring Error
(GPT-8000A series)
For the best results, aim or point prisms in the direction of the GPT-8000A series so that maximum
signal can be returned to the instrument. Sighting prism obliquely because of inclined settings, may
result in measuring errors. These errors will be proportional to the misalignment as showing in fol-
lowing graphs. The more misalignment of the prism, the more error in measurement. Measured data
can be different according to the prism constant value. This can occur when a prism is moving. Pin-
pole prism set L1 (for one-person surveying) and pin-pole prism holder L1 (for fixed point observa-
tion) are designed to minimize measuring error in such case. Make the best use of them. In case
you are forced to use the normal prism in inclined state because there is no other way possible, we
recommend to use switching holder, prism constant value (0 or 30mm), and set to 30mm
(Compensation value of -30mm).
To Next Page
Loading...
Need help?
General
