19
operations in 3.5, press soft key [Enter] to move inserter down to
the ‘PPM’ column to enter the value.
Temp.:
Press:
Signal
℃
hpa
Clear
B.S
Enter
F1
3
F4
F2
F3
Prism c:
mm
PPM:
ppm
Signal
20
1013
0
0
Temp.:
Press:
Signal
℃
hpa
Clear
B.S
Enter
F1
3
F4
F2
F3
Prism c:
mm
PPM:
ppm
Signal
20
1013
0
3
3.6.2 Calculate the Atmospheric Correction out with
temperature and pressure sensor
First, measure the temperature and pressure around the
station in advance.
e.g. Temp: +25
℃
atm:1017.5
Press soft key [Enter] to move inserter to the ‘Temp’
column and type in ‘25.0’;
Press soft key [Enter] to move inserter to the ‘Press’
column and type in ‘1017.5’;
Press soft key [Enter] to move the inserter to the [prism c]
column;
(the‘PPM’ column now displays 3)
Press [ENT] to save the parameter. Our system will display
‘Record: ***(name of the point)’ and exit the dialogue box. The
point is saved now.
3.7 The Correction of the Atmospheric refraction
and the Earth Curvature
When measuring horizontal distance and elevation, our
instrument corrects the atmospheric refraction and the earth
curvature automatically.