Campbell Scientific CS725 Snow Water Equivalency Sensor - Manual (Page 35)

CS725 Snow Water Equivalency Sensor
radiation count values seen in the detailed measurement data output string
which can be accessed by typing the command [.fl].
11. Firmware Update (using command .0xw)
The firmware for the CS725 can be updated using the RS-232 serial
communication interface. This can be accomplished by connecting the CS725
to a computer using the DB9F-TERM (see Section 4, Connecting the CS725 to
a Computer).
A terminal communication program such as Hyperterminal will be required to
transfer the new firmware file to the CS725.
The firmware update involves the transfer of a large file, and for this reason the
baud rate setting can be increased for the program update procedure. The
maximum baud rate that can be used is a function of the cable length. The
following table shows the recommended maximum baud rate for various cable
lengths:
Cable Length Maximum Baud Rate
0 to 7.6 m (0 to 25 ft) 57600
0 to 15.2 m (25 to 50 ft) 38400
0 to 30.5 m (50 to 100 ft) 9600
Terminal settings should be as follows:
Baud Rate: See table above
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control: XON/XOFF
Local Echo: Enabled
Terminal Mode: ANSI
Send Line Ends with Line Feeds: Disabled
Note that the XON/XOFF flow control needs to be enabled. For all other
normal communications, the XON/XOFF flow control will need to be disabled.
Once the terminal program is setup and the CS725 is connected to the
computer using the DB9F-Term, power can be applied to the CS725.
If a baud rate other than 9600 was selected, the auto baud rate synchronization
can be invoked by typing the command “UU.”. Once the menu is
displayed, the command “.0xw” can be entered for reprogramming the
firmware.
The following will be displayed once the “.0xw” is entered:
allocating memory buffer,,,,,,,,,,,
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