Teledyne API T803 CO2/O2 Analyzer Operation Manual Remote Operation
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8.2.1.6. COM PORT PASSWORD SECURITY
In order to provide security for remote access of the T803, 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 (Mode 4, Section 6.2.1).
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 T803 analyzer with SECURITY MODE feature enabled, type:
LOGON 940331
Note 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.

8.3. REMOTE ACCESS BY MODEM

The T803 can be connected to a modem for remote access. This requires a cable
between the analyzer’s COM port and the modem, typically a DB-9F to DB-25M
cable (available from Teledyne API with PN WR0000024).
Once the cable has been connected, check to make sure:
07276B DCN6418