LI-COR LI-7500, Instruction Manual

Page: 63 / 155

Section 3
3-34 Setup and Operation
SDM Address
SDM communications are enabled in Campbell Scientific dataloggers with the SDM-LI7500
instruction (Instruction 189, see the datalogger or the LI-7500 manual published by Campbell
Scientific). Parameter 3 in the SDM-LI7500 instruction defines what data are sent to the
datalogger from the LI-7500. Parameter 3 can take on values between 0 and 6. See Table 3-1
for parameter 3 value definitions.
Table 3-1. Parameter 3 value definitions.
Mode Items Sent
0 CO
2
mmol/m
3
H
2
O mmol/m
3
1 CO
2
absorptance
H
2
O absorptance
2 Pressure (kPa)
Temperature (C)
Aux channel (user units)
Cooler signal (Volts)
3 Diagnostic value (see below)
Bandwidth (Hz)
Delay interval