Campbell Scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer - Manual (Page 52)

Appendix A. EC150 Settings
The Fixed Temperature Value setting is stored in non-volatile memory of the
EC100 electronics.
A.2.10 Pressure Sensor
There are three options for measuring barometric pressure for the EC150 that
have different corresponding Pressure Sensor settings.
1. The EC100 has an on-board barometer that Campbell Scientific refers
to as the EC100 basic barometer. This barometer is mounted on the
EC100 electronics board as shown in FIGURE A-1.
EC100 Basic Barometer:
The EC100 always includes the EC100 basic barometer as a factory
default and the default settings is EC100 Basic.
FIGURE A-1. Location of EC100 basic barometer
2. An enhanced-performance barometer can be specified when ordering
an EC100 for any of Campbell’s gas analyzers, and is referred to as the
enhanced barometer. The enhanced barometer is installed in the
factory when specified at the time of order. It will come mounted on
the top wall of the EC100 environmental enclosure towards the left, as
shown in FIGURE A-2.
The enhanced barometer can provide greater accuracy in certain
environmental conditions that cannot be achieved with the standard
barometer. FIGURE A-3 compares the expected error relative to
environmental conditions for the two barometers. Errors related to the
altitude of the study site may also warrant the choice of one barometer
over the other. Given the various parameters that drive the decision,
the most prudent route is to provide a Campbell Scientific application
engineer sufficient detail about the expected monitoring site at the time
of order.
EC100 Enhanced Barometer:
If the EC100 is ordered with the enhanced barometer, the factory
default setting is EC100 Enhanced.
A-4