
BGC-FTIR Sensors | PTB 210 23
1.2.6 Pressure
Vaisala PTB210
User Information
The pressure measurement requires high accuracy and precision to calculate
volume mixing ratio of the measured trace gases. So the automatic weather
station is equipped with two digital Vaisala PTB 210 which feature digital
output in a range of 500 to 1100hPa. A third sensor of the same type is
used for the leap-frog recalibration scheme (for details see figure 1.17). They
operate in a wide temperature range and the rugged corrosion-resistant housing
provides an IP65 standardized protection against sprayed water.
Figure 1.16: Vaisala PTB 210
Maintenance
The barometers are digitally adjusted and calibrated by using electronic work-
ing standards. To maintain the reliability of the system the leap-frog recali-
bration scheme is carried out according to Fig. 1.17.
Figure 1.17: Leap-Frog recalibration scheme
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