Nikon NPL-632, Инструкция по эксплуатации

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2 Preparation
18 Field Station NPL-632 Instruction Manual
b. Looking through the eyepiece, rotate the
diopter ring until the reticle crosshairs
are in sharp focus.
2. Eliminate parallax:
a. Aim the telescope at the target image.
b. Rotate the focusing ring until the target
image is in sharp focus on the reticle
crosshairs.
c. Move your eye vertically and laterally to
check whether the target image moves
relative to the reticle crosshairs.
If the target image does not move, there is no parallax.
d. If the target image does move, rotate the telescope focusing ring. Then
repeat from
Step c .
3. Rotate the tangent screw:
–
The final turn of the tangent screw should be in a clockwise direction, to
align the target accurately on the center crosshairs.
Setting the Measurement Mode and Preparing the Target
The NPL-632 instrument has two measurement modes:
Prism mode (
Prism
) and Reflectorless mode
(
N-Prism
). These modes can be changed at any time
by holding down the
[MSR1]
or
[MSR2]
key for one second.
For more information, see, page 53 .
The following table describes how to set the
measurement mode depending on the target you want to measure.
In some cases, you can measure another target that is not appropriate to the set
measurement mode.
Measurement with a prism
As the NPL-632 is extremely sensitive, multiple reflections on the prism surface can
sometimes cause a significant loss in accuracy.
To maintain the accuracy of your measurements:
Target Target setting
Prism, reflector sheet Prism (Prism mode)
Other (reflective materials) N-Prism (Reflectorless mode)
Diopter ring
Telescope
focusing ring