Campbell Scientific CS100 Barometric Pressure Sensor - Manual (Page 15)

CS100 Barometric Pressure Sensor
Remember that for the sensor to detect the external ambient pressure, the
enclosure must vent to the atmosphere (i.e., not be hermetically sealed).
Enclosures purchased from Campbell Scientific properly vent to the
atmosphere.
For user-supplied enclosures, it may be necessary to make a vent
hole on the outer wall. In this situation, do not make the hole on
one of the vertical side walls, as wind blowing around it can
cause transient changes in pressure. NOTE
7.2 Wiring
7.2.1 Datalogger Connection
Before connecting the barometer to the datalogger, a yellow warning label
must be removed from the pigtails (see FIGURE 7-2). The warning label
reminds the user of the importance of properly connecting the barometer to the
datalogger. Proper wiring is shown in TABLE 7-1.
FIGURE 7-2. CS100 as removed from the box
Yellow Warning Label
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