Owner manual

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.<Enter>”. 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,,,,,,,,,,,