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 <Enter> 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 <Enter> 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 <Enter> to
accept TAI as the default password.
—or—
<Enter> If a password has been previously installed, enter the
password press <Enter> to scroll through the letters.