Error When No Atmospheric Correction Is Made - Pentax R-422VN Instruction Manual

1200 900 908
[Converting from mmHg to hPa]
mmHg 0 10
400 533 547
500 667 680
600 800 813
700 933 947
800 1067 1080
900 1200 1213

12.4 Error when no atmospheric correction is made

When measurement is carried out with no atmospheric correction (with the settings fixed at a
temperature of 15°C and an atmospheric pressure of 1013hPa or 760mmHg), the error per 100
meters in temperature and pressure will be shown in the tables below.
• When the actual pressure is 1013hPa (760mmHg) and the temperature is 25°C, conducting
the measurement with the temperature left at 15°C will result in the measurement being
short by 0.9mm per 100 meters.
[Error table: When hPa (15°C, 1013hPa as standard)]
hPa
1200
C°
45 2.0
35 3.0
25 4.0
15 5.2
5 6.3
-5 7.6
-15 9.0
[Error table: With mmHg (15°C, 760mmHg as standard)]
mmHg
C°
45
35
25
15
5
-5
915 923
20 30
560 573
693 707
827 840
960 973
1093 1107
1227 1240
1100 1013
-0.5 -2.6
0.4 -1.8
1.4 -0.9
2.4 -0.0
3.5 1.0
4.7 2.1
5.9 3.2
900 800 760
2.0 -1.3 -2.6
3.0 -0.4 -1.8
4.0 0.5 -0.9
5.2 1.5 0.0
6.3 2.5 1.0
7.6 3.7 2.1
930 938 945
40 50 60
587 600 613
720 733 747
853 867 880
987 1000 1013
1120 1133 1147
1253 1267 1280
900 800 700
-5.5 -8.0 -10.5
-4.7 -7.3 -9.9
-4.0 -6.6 -9.3
-3.1 -5.9 -8.6
-2.2 -5.1 -8.0
-1.3 -4.2 -7.2
-0.2 -3.3 -6.4
700 600
-4.6 -8.0
-3.9 -7.3
-3.1 -6.6
-2.2 -5.9
-1.3 -5.1
-0.3 -4.2
953 960 968
Unit:hPa
70 80 90
627 640 653
760 773 787
893 907 920
1027 1040 1053
1160 1173 1187
1293 1307 1320
Unit:mm
600 500
-13.0 -15.5
-12.5 -15.1
-12.0 -14.6
-11.4 -14.2
-10.8 -13.7
-10.2 -13.1
-9.5 -12.6
Unit:mm
500 400
-11.3 -14.6
-10.8 -14.2
-10.2 -13.7
-9.6 -13.3
-8.9 -12.7
-8.2 -12.2
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