Campbell CS451, Инструкция по эксплуатации

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CS451/CS456 Submersible Pressure Transducer
FIGURE 7-4. Terminal Emulator
TABLE 7-4. RS-232 Terminal Commands
Terminal Commands Values Returned
1 Serial Number, Pressure/Level, Temperature
(in configured units)
2 Serial Number, Pressure (kPa), Temperature
(°C)
3
Serial Number,
Δ
R(ohms), Rb(ohms),
Temperature (°C), Element Serial Number,
Product Name
5 Copyright information, OS Version and Date,
Serial Number, Element Serial Number,
Product Name, User Defined Name (Station
Name), SDI-12 Address
H or h Help menu
7.1.5 SDI-12 Commands
The CS451/CS456 uses an SDI-12 compatible hardware interface and supports
a subset of the SDI-12 commands. The most commonly used command is the
aM! command, issued by the datalogger, where a represents the sensor address.
The communication sequence begins with the datalogger waking the sensor
and issuing the
aM! command. The transducer responds to the datalogger
indicating that two measurements will be ready within two seconds.
Subsequent communications handle data reporting from the sensor to the
datalogger.
The SDI-12 protocol has the ability to support various measurement
commands. The CS451/CS456 supports the commands that are listed in
TABLE 7-5.
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