Topcon ES-62 Instruction Manual page 156

 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.
Operating procedure
1
Press the {F4} key to get the soft key page 2 in the
distance measurement mode or page 3 in the
coordinate measurement.
2
Press the {F3} (S/A) key to set Set Audio Mode
from distance or coordinate measurement mode.
3
Press the {F2} (PPM) key.
Current setting value is displayed.
4
Enter atmospheric correction value. *1)
Mode returns to Set Audio mode.

*1) Refer to Section 2.4 "How to Enter Alphanumeric Characters".
 Input range: –999.9ppm to 999.9ppm,0.1ppm step
 Atmospheric Correction Chart (For your reference)
1100
-50
1050
-40
-30
1000
950
900
850
800
750
700
650
-20 -10
-20
-10
0
10
20
30
0 10
Temperature ( C)
12 SETTING ATMOSPHERIC CORRECTION
Operation
HR: 120°30'40"
HD* 123.456 m
VD:
{F4}
MEAS MODE
OFSET S.O
{F3}
PSM:0.0
NPM:0.0
SIGNAL:[IIIII]
PRISM PPM
{F2}
PPM SET
Enter Data
{F4}
40
50
60
70
80
20 30
12-3
Display
5.678 m
NP/P P1
S/A
PPM
T-P
PPM = 0.0 ppm
--- --- [CLR] [ENT]
90
100
110
40 50
↓
↓
P2
0.0
–––
0
500
1000
1500
2000
2500
3000