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Model 9110TH NOx Analyzer Remote Operation
Teledyne Analytical Instruments 191
8.4. PASSWORD SECURITY FOR SERIAL REMOTE
COMMUNICATIONS
In order to provide security for remote access of the 9110T, a LOGON feature can be enabled to require
a password before the instrument will accept commands. This is done by turning on the SECURITY
MODE (refer to Section 5.5). Once the SECURITY MODE is enabled, the following items apply.
A password is required before the port will respond or pass on commands.
If the port is inactive for one hour, it will automatically logoff, which can also be achieved with the
LOGOFF command.
Three unsuccessful attempts to log on with an incorrect password will cause subsequent logins to
be disabled for 1 hour, even if the correct password is used.
If not logged on, the only active command is the '?' request for the help screen.
The following messages will be returned at logon:
LOGON SUCCESSFUL - Correct password given
LOGON FAILED - Password not given or incorrect
LOGOFF SUCCESSFUL - Connection terminated successfully
To log on to the 9110T analyzer with SECURITY MODE feature enabled, type:
LOGON 940331
940331 is the default password. To change the default password, use the variable RS-232_PASS issued
as follows:
V RS-232_PASS=NNNNNN
Where N is any numeral between 0 and 9.