CS230/CS231 Temperature Profiler
9
Outputs of both lifetime and user resettable minimum and maximum
temperatures are also available during powered operation from each
temperature point in the CS230/CS231. The user-resettable minimum and
maximum temperatures can be used to monitor specific seasons or periods of
measure, without having to review the entire data set. The lifetime minimum
and maximum temperatures are used for maintenance and warranty records.
The lifetime and user-resettable minimum and maximum temperature values
are single 1-second readings.
TABLE 8-1. SDI-12 Commands
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
aR7!
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
8.1.1 SDI-12 Addressing
Each temperature sensor has a different default SDI-12 address. The starting
addresses is 1 and coincides with the first external probe or the top temperature
point in the rigid probe if an external probe is not included. The last address
coincides with the bottom sensor in the rigid probe assembly.
If multiple SDI-12 sensors are connected to the data logger, Campbell
Scientific recommends using separate terminals when possible. However,
multiple SDI-12 sensors or multiple CS230/CS231 sensors can connect to the
