Teledyne LXT-220 - Manual (Page 31)

Dissolved Oxygen Controller Operation
Teledyne Analytical Instruments 31
INPUT A/D CONVERTER TRIM
Some instruments have two channels measuring two unrelated
quantities, and in those cases both channels can be configured from the
same configuration menus.
Depending on options selected 2 additional submenus could appear:
PID ASSIGN
HART ASSIGN
Scroll down to the item of interest, and then simultaneously depress
the ◄ and ► keys to access the sub-menu for that item.
3.3.1 Password Protection
It is worthwhile to become familiar with the password capabilities
of the instrument even if you decide not to use them, as it is possible that
one gets set by mistake and you need to change or erase it.
Password protection can be selectively turned on for the operational
and configuration displays. The operational and configuration passwords
can be different. Passwords are entered using only the right four keys,
and the passwords are numbers consisting only of the digits 1 to 4. No
digits are shown on the keyboard. It is necessary to remember that the
top key is 1, the right key is 2, the bottom key is 3, and the left key is 4.
See Figure 3-2.