CHCNAV CHC CTS-112R4, Руководство пользователя

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CHC CTS-112R4 user manual 20
3) Press [F4] (ENT) to return to Star key mode.
Refer to 6.7 “Method of inputting, alphanumeric characters” to learn how to input numbers
or characters.
Inputting range of temperature: -30° +60°C (step: 0.1°C) or -22 +140
℉
(step: 0.1
℉
)
Inputting range of pressure: 560-1066 hPa (step: 0.1 hPa) or 420
～
800 mmHg
(step length: 0.1 mmHg) or 16.5-31.5 inHg (step: 0.1 inHg)
If the PPM calculated according to temperature and press input is beyond ±999.9 ppm, the system will
return to Step 2 automatically and you should input the value again.
5.7. Correction on atmospheric refraction error and earth curvature
During horizontal distance measurement and height difference measurement, the instrument corrects
the atmospheric refraction error and earth curvature automatically. Formula of correction on
atmospheric refraction error and earth curvature:
If you do not correct the atmospheric refraction error and earth curvature, the formula for HD and VD:
•
D = S∙cosα
•
H = S∙sinα
In the formula:
•
K = 0.14 - coefficient of atmospheric refraction
•
Re = 6370 km - radius of earth curvature
•
α (or β) - vertical angle measured from horizontal plane (vertical angle)
•
S - slide distance
The default value of the atmospheric refraction is set to K = 0.14. K can be set to 0.14 or 0.2. It
can also be closed. To modify the K value, refer to section 13 “Parameters”.
5.8. Setting minimum reading of setting angle/distance
Setting of minimum reading, the units of angle/distance measurement are selectable.
Angle unit : 1”/ 5”/ 10”/ 0.1”
Distance Unit: 1 mm/ 0.1 mm