Emerson Process Management OXYMITTER 4000 - Manual (Page 80)

Instruction Manual
IB-106-340C Rev. 4.1
July 2004
6-2 Startup and Operation with LOI Rosemount Analytical Inc. A Division of Emerson Process Management
Hazardous Area Oxymitter 4000
LCD
DISPLAY
WINDOW
SELECTION
ARROWS
SELECTION
ARROW
37260054
SELECTION
ARROW
TOUCH
CONFIRMATION
LED
Figure 6-3. LOI Features
6-3 NAVIGATING THE LOCAL OPERATOR
INTERFACE
a. Overview
The Local Operator Interface (LOI), shown
in Figure 6-3, utilizes a bright blue gas-
florescent display. Intensity is adjustable.
There is an Infra-red LED source and a
detector for each key. The detectors can
detect a finger placed above the button
through the glass window. There is no need
to open the instrument in bad weather or in
hazardous areas in order to access the
electronics.
It should be noted that the Hazardous Area
Oxymitter 4000 also utilizes HART commu-
nications, permitting access to all instrument
functionality anywhere the 4-20 mA signal
terminates via a HART model 275/375
handheld communicator.
b. 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 estab-
lished when no buttons are pushed for 30
seconds (default). This countdown to lock-
out is configurable.
In order to unlock the display, input a "Z"
pattern. First, push the top left (gray) arrow,
then the top right, followed by the bottom
left and finally the bottom right. The "LK"
notation in the upper right corner of the
display will now disappear. Push the gray
arrow at the top left hand corner once more
to enter into the menu structure. Once one
moves deeper into the menu structure,
additional time is provided to the user so
that the lockout initiation does not become
a nuisance. This additional “revert” time is
defaulted at one hour and is also user con-
figurable.
6-4 LOI KEY DESIGNATIONS
The gray key (top left) key will move one level
higher in the menu structure. When entering
numbers, this key will move the cursor to the
left. This key also doubles as an “Enter” key,
once numbers are entered, and when the cursor
is moved to it’s left-most position. The new data
entry value will appear in the top line of the LOI
display once it’s accepted.
The blue key (bottom left) acts as a selector
when choosing from among a number of menu
items. This key also will move the cursor to the
right when entering numbers.
Up/Down keys (to the left side of the keypad)
are used to increment up and down when
selecting from a series of menu picks. They are
also used for incrementing values up and down
for data input.