Set Up The Atmospheric Correction Value (Ppm) Directly; Calculate The Atmospheric Correction Out With Temperature And Pressure Sensor - Titan TTS2 Manual

The standard atmospheric value of our series Total Station (i.e.
the atmospheric conditions when the correction is zero)
Atm: 1013 Pa
△S= 277.825- 0.29434P/(1+0.003661T) (ppm)
Temp:20℃
The calculation of atmospheric correction
△S: correction coefficient (unit: ppm)
In the formula:
P: atmospheric pressure (unit: hPa)
T: temperature (unit:℃)

3.6.1 Set up the Atmospheric Correction value (ppm) directly

You may measure the temperature and pressure to find out the
atmospheric correction (ppm) through the correction formula or from
the atmospheric correction chart. Continuing with the operations in
3.5, press soft key [Enter] to move inserter down to the 'PPM'
column to enter the value.
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.
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