Campbell CS225, Инструкция по эксплуатации

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CS225 Temperature String
9
TABLE 7-3 SDI-12 Commands for the CS225
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 & 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 & 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 X13CAMPBELLCS225 1.0 SN:XXXXX
7.2.1 SDI-12 Addressing
The CS225 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 CS225 strings need to be placed in the same SDI-12 channel
in order to avoid duplicate addresses on the same SDI-12 channel.
The starting address will be 1 and this will coincide with the first temperature
sensor, which is located at the end of the sensor array. 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