O2X
DUO
- 14
Air pressure conversion
It is important to enter the correct air pressure before doing an air calibration. Air
pressure is measured in mBar (which is exactly the same as the SI-unit hPa).
Below is a formula and a table to convert from inHG to mBar (and thus to hPa).
12.
Scaling
mBar
=
inHg
∗∗
1000
29.5
The “Scale / Alarm” menu allows the user to set the high and low limits for the 4-
20mA output signal. In addition, this menu allows the user to set high and low alarms
values that can be used to notify when the level has reached critical points.
Max
sets the 20 mA point output
Min
sets the 4 mA point output (may be a negative value for special
applications)
Hi-Alarm
sets the High Alarm set point, the value zero inactivates the alarm
Low-Alarm
sets the Low Alarm set point, the value zero inactivates the alarm
InHg
mBar / hPa
29.2
990
29.3
993
29.4
997
29.5
1000
29.6
1003
29.7
1007
29.8
1010
29.9
1014
30.0
1017
30.1
1020
30.2
1024
30.3
1027
30.4
1030
