Emerson Rosemount OCX8800 Quick Start Manual page 38

Quick Start Guide
Use the blue (bottom left) key as a selector when choosing from
among several menu items. This right-pointing key also will move
the cursor to the right when entering the digits of a new parameter
value.
Use the up and down pointing keys to increment up and down when
selecting from a vertical list of menu items. You can also use these
keys for incrementing values up and down for new data input.
4.1.3 Lockout
The local operator interface (LOI) has a lockout feature that prevents
nuisance actuation by someone brushing against the glass window,
raindrops, dirt, insects, etc. This lockout mode is automatically
established when no buttons are pushed for 30 seconds (default).
This countdown to lockout is configurable.
In order to unlock the display, input a Z pattern
touch the top left (gray) Enter key. Next, touch the top right key,
followed by the bottom left key and the bottom right key. The LK
notation in the upper right corner of the display will disappear. Touch
Enter once more to enter into the menu structure. Whenever you
touch a key, additional time to lockout is provided, so that the lockout
feature does not become a nuisance. This additional revert time is
one hour (default) and is also user configurable.
CAUTION
Excessive dust can prevent the LOI from entering lockout. This
condition can cause uncommanded operations to occur.
Always clean dust and soil away from the LOI screen each time the
LOI is used.
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July 2023
(Figure 4-2). First,
Rosemount OCX8800