Campbell CS230, Field Maintenance And Instruction Manual

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CS230 Temperature Profiler
9
TABLE 7-3. SDI-12 Commands for the CS230
SDI-12
Command Variable Name Description
aR0! Temperature value Temperature – floating point (°C)
aR1!
Serial number, location number, depth
value (in cm)
Serial number, location number, depth value (in
cm)
aR2! Read user resettable min temperature Min. temperature – floating point (°C)
aR3! Read user resettable max temperature Max. temperature – floating point (°C)
aR4! Read lifetime min temperature Min. temperature – floating point (°C)
aR5! Read lifetime max temperature Max. temperature – floating point (°C)
aR6!
Read and reset user resettable
min temperature
Min. temperature – floating point (°C). This
value constitutes the minimum of all 1-second
measurements taken since the previous aR6!
Command.
aR7!
Read and reset user resettable
max temperature
Max. temperature – floating point (°C). This
value constitutes the maximum of all 1-second
measurements taken since the previous aR6!
Command.
aV!
Verification command S1 = BootRom Signature
S2 = Firmware Signature
aAb! Change Address command Valid addresses in sequence are:
1–9 / A–Z / a–z (no Address 0)
Sending a broadcast message with the address
change “{” can correct units that have conflicting
addresses.
aI! SDI-12 Identification command X13CAMPBELLCS230 1.0 SN:XXXXX
7.2.1 SDI-12 Addressing
The CS230 comes pre-programmed with addresses from the factory. However,
if ever needed, the address of temperature sensors can be changed. This may be
necessary if two CS230 probes need to be placed in the same SDI-12 channel
to avoid duplicate addresses on the same SDI-12 channel.
The starting addresses will be 1 and this will coincide with the first external
probe or the top temperature point in the rigid probe if no external probes are
included. The last address will coincide with the bottom most sensor in the
rigid probe assembly. It is recommended to start the readdressing process with
the largest temperature sensor address to avoid duplicate addresses.
When readdressing temperature sensors, you must avoid giving
multiple sensors the same address. If this does occur, you will no
longer be able to communicate with these sensors. Use the
aA{!
command, where a is the affected address. This will reset the
affected sensors to their factory configured address value.
NOTE