Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 60)

Operation Model 4020
Teledyne Analytical Instruments 42
Figure 4-4: AUTOCAL Screens
4.6.7 Password Protection
Before a unique password is assigned, the system assigns TAI by
default. This password will be displayed automatically. The operator just
presses to be allowed total access to the instrument's features.
If a new password is assigned, then all system parameters can be set
after the password is correctly entered. When logged out, only the
MODEL function, an information only screen, is available.