Campbell CSAT3, Instruction Manual

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CSAT3 Three Dimensional Sonic Anemometer
9
The CSAT3 electronics box contains unique calibration
information for its respective sensor head. Do not
mismatch CSAT3 sensor heads and electronics. Doing
so will result in erroneous wind and speed of sound
measurements.
Before extending the SDM signal cable, read Appendix D.
Short haul modems, wire or fiber optic, may be used to lengthen
the RS-232 communications cable. Short haul modems do not
include an RTS signal. The CSAT3's RS-232 drivers can be
asserted by a software setting in the CSAT3. This setting will
always power the RS-232 drivers, independent of the RTS line.
Spark gaps (model 6536 and 6361) may be required to protect
against transients when using wire short haul modems. Spark
gap protection is not needed with fiber optic short haul modems.
TABLE 5-1. CSAT3 Power
Battery
Terminal Description Color Pin
Positive 12 Vdc Red A
Negative Power Reference Black B
TABLE 5-2. CSAT3 SDM Output to a
CR3000, CR5000, and CR9000X Datalogger
Channel Description Color Pin
SDM-C1 SDM Data Green D
SDM-C2 SDM Clock White C
SDM-C3 SDM Enable Brown E
G Digital Ground Black F
G Shield Clear nc
TABLE 5-3. CSAT3 SDM Output to a
CR1000, CR800/850, CR23X and CR10(X) Datalogger
Channel Description Color Pin
C1 SDM Data Green D
C2 SDM Clock White C
C3 SDM Enable Brown E
G Digital Ground Black F
G Shield Clear nc
CAUTION
NOTE
NOTE