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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 RCS (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.
Press [2] in HOT key menu to enter into
Temp&Pres Setting.
Input temperature value and press
[REC/ENT] to move to next item. Input pressure
value and press [REC/ENT]
1) The inputting scope: Temperature:-40 - +60°C (step length 0.1° C) or -40 - 140° F (step length 0.1° F)
Air pressure: 420 - 799.5mmHg (step length 0.1mmHg) or 560 - 1066 hPa (step length 0.1hpa)
16.5 - 31.5 inchHg (step length 0.1 inchHg)
2) The atmosphere correction value will be calculated by the instrument according to the inputted
temperature and pressure value.
3.3.3 Select Target Set
A target set specifies settings for the target type, the prism constant, and height of target.
When you change the selected target set, all the three settings are changed. You can use this function to
quickly switch between two types of targets, such as a reflecting sheet and a prism.
To select a target set, use [▲]/[▼] to highlight the target set in the list and press [ENT]. To change the
settings defined in a target set, highlight the target set in the list. Then press “Edit” softkey.
When a target set is selected, the Type and Const values are copied to both [MSR1] and [MSR2] settings.
If you have specified a value for HT, this value is also copied to the current HT.
In Hot Key menu, press numeric key [3] to
enter target function.
Press [▲]/[▼] to select target set, and then
press [ENT].
To edit the target set, highlight the target set
and press Edit. After editing, press [ENT]
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