Emerson Rosemount OCX8800A Manual page 72

Using the local operator interface (LOI)
December 2022
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.
4.2.3 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
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.
Figure 4-3: Z Pattern Entry
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00809-0500-4880
(Figure 4-3). First, touch the top
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