3.3.2 Set the Temperature & Pressure
Atmosphere Correction:
The speed of light in air is extremely fast. And it is not a constant, but changes with the temperature and
pressure of atmosphere. Once atmosphere correction is set, this instrument can implement atmosphere
correction automatically.
Even the instrument is powered off, the atmosphere correction value is still kept.
The formula of atmosphere correction: (unit: meter))
𝑃𝑃𝑀 = 273.8 −
0.2900 × pressure value (hPa)
1 + 0.00366 × temperature value (°C)
If the pressure unit is mmHg：
1hPa = 0.75mmHg
When disregarding atmosphere correction, set PPM value to 0.
Standard atmospheric condition of Total Station R2 Series (i.e. the atmospheric condition that the
atmosphere correction value of the instrument is 0):
Pressure: 1013 hPa
Temperature: 20° C
Using [HOT] Key and [2] can set temperature and pressure values. Enter the ambient temperature and
pressure, the PPM value is updated automatically.
b.
The screen displays the current setting
values. Input temperature value and
press [REC/ENT] to move to next item.
Input pressure value and press
[REC/ENT].※1)
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