Topcon AP-L1A - Page 80

11. SETTING ATMOSPHERIC CORRECTION
11-2
 Range to be input : TEMP. -30C to+60 C, in unit 1 C
(-22
F to +140F, in unit 1F)
PRES. 420mmHg to 800mmHg, in unit 1mmHg
(16.5inHg to 31.5inHg, in unit 0.1inHg)
315hPa to 1066hPa, in unit 1hPa
 When the atmospheric correction value which is calculated from the input temperature and pressure
values exceeds the range
 99ppm, the operating procedure returns to step  automatically. Input
values again.
 How to Set the Atmospheric Correction Value Directly
Measure the temperature and air pressure to find atmospheric correction value(PPM) from the
chart or correction formula.
Example * Atmospheric correction value,-6 (ppm)
Operating procedure Operating key Display
 After pressing [F4]() key 3 times to be
function as in page 4 in distance or
angle measurement mode, press
[F3](S/A) key to set "Set Audio Mode" .
[F3]
S/A
PSM : 00 SIG:60
PPM : 83
EXIT PSM PPM T-P
 Press [F3](PPM)key.
Current setting value is displayed.
[F3]
PPM SET
PPM : 00PPM
EXIT
  
CLR
 
 Input atmospheric correction value and
press [ENT] key.
- 6
PPM SET
PPM : -6 PPM
EXIT
  
CLR
 
Mode returns to Set Audio Mode.
[ENT]
 Range to be input : -99ppm~+99ppm, 1 ppm step