Campbell Scientific EC150 CO2 and H2O Open-Path Gas Analyzer and EC100 Electronics with Optional CSAT3A 3D Sonic Anemometer - Manual (Page 31)

EC150 CO
2
/H
2
O Open-Path Gas Analyzer
6.3.3 Connect the EC150 Temperature Probe
1. Unscrew the temperature connector cover which is found on the bottom of
the EC100 enclosure labeled Temperature Probe (see FIGURE 6-12).
2. Insert the three-prong temperature probe connector into the female
connector on the enclosure and screw it firmly in place. The EC150
temperature probe cable is approximately 3.0 m (10.0 ft) in length.
6.3.4 Ground the EC100 Electronics
1. Attach a user-supplied heavy gauge wire (12 AWG would be appropriate)
to the grounding lug found on the bottom of the EC100 enclosure.
2. Earth (chassis) ground the other end of the wire using a grounding rod.
For more details on grounding, see the CR3000 datalogger manual
grounding section.
Grounding the EC100 is critical. Proper grounding to earth
(chassis) will ensure maximum electrostatic discharge
(ESD) protection and improve measurement accuracy.
Do not connect or disconnect the EC150 gas analyzer head
or CSAT3 sonic head once the EC100 is powered.
6.3.5 Connect SDM Communications to the EC100
The EC150 supports SDM communications with datalogger. SDM is the
preferred communications to the EC100. RS-485 may be necessary in some
situations. The USB is used mainly for diagnostic and trouble shooting.
Connection instructions for these modes can be found in Appendix C, Alternate
EC100 Outputs.
CABLE4CBL-L (pn 21972) is used for connecting SDM communications to
the EC100. The “L” designation denotes the length of the cable which is user-
specified.
1. Loosen the nut on one of the cable entry seals ( Cable 1) on the bottom of
the EC100 enclosure (refer to FIGURE 6-12).
2. Remove plastic plug and store in mesh pocket of enclosure.
3. Insert the cable while referring to TABLE 6-1 for details on which color of
wire in the cable should be connected to each terminal found on the SDM
connector of the EC100 panel.
4. Once the wires of the cable are fully connected, retighten the nut on the
appropriate cable entry.
CAUTION
CAUTION
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