Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 61)

Total Hydrocarbon Analyzer Operation
Teledyne Analytical Instruments 43
Note however, that the instrument can still be used for analysis or for
initiating a self-test without entering the password. To defeat security
the password must be changed back to TAI.
Note: If you use password security, it is advisable to keep a copy
of the password in a separate, safe location.
To log in, enter the correct password as described in the next section. To
logout, use the LOGOUT function as described in Section 4.6.8.
4.6.7.1 E NTERING THE P ASSWORD
To install a new password or change a previously installed password,
you must key in and ENTER the old password first. If the default
password is in effect, pressing will enter the default TAI
password for you.
To enter a password:
<any key> Enter MAIN MENU setup by pressing any key.
<▲▼> Use the UP or DOWN key to scroll to PSWD.
<Enter> Press to activate the password function. Either
the default TAI password or AAA place holders for an
existing password will appear on screen depending on
whether or not a password has been previously installed.
<Enter> The screen prompts you to enter the current password. If
you are not using password protection, press to
accept TAI as the default password.
—or—
<Enter> If a password has been previously installed, enter the
password press to scroll through the letters.