41
velocity of the light in air is affected by the temperature and air pressure.
Calculate the atmospheric correction factor as shown in following formula.
If the unit is mmHg, please convert as:
1hPa
=
0.75mmHg
If the atmospheric correction is not required, set the ppm value to 0.
·
The KTS series are designed so that the correction factor is 0 ppm at an air pressure of 1,013 hPa and a
temperature of 20
℃
.
EXPLANATION Distance measurement mode
·
The following are the measuring time and the smallest distance displayed for each measurement method when a
reflective prism is used.
·
Fine Measurement
Accuracy
：
±
（
2 + 2PPM×D
）
mm
（
D is the measuring distance
）
Measuring time
：
3 sec
Minimum display
：
1mm
·
Tracking Measurement
Measuring time
：
1sec
Minimum display
：
10mm
·
Settings for distance measurements
Operation
Display
Press EDM in page 1 of MEAS mode.
Set the following items
1 Temperature
2 Air pressure
3 Atmospheric correction factor PPM
4 Prism constant
5 Distance measurement method
Temp
：
20
℃
Press
：
1013.0 hPa
PPM
：
0.0 ppm
PC
：
-30 mm
Mode
：
Fine” s”
Reflector: NON-P
