Emerson Process Management IM-106-340 instruction manual Overview Lockout, LOI Features

Instruction Manual

IM-106-340, Rev. 4.0

May 2006

Figure 6-3. LOI Features

Touch

Confirmation

SelectionLED

Arrow

Selection

Arrows

Oxymitter 4000

Selection

Arrow

LCD

Display

Window

37260054

START UP OXYMITTER 4000 CALIBRATION

NAVIGATING THE LOCAL OPERATOR INTERFACE

Overview

Lockout

Refer to Section 9: Maintenance and Service, for calibration instructions.

The Local Operator Interface (LOI), shown in Figure 6-3,utilizes a bright blue gas-fluorescent display. Intensity is adjustable. There is an Infrared 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 in order to access the electronics.

It should be noted that the Oxymitter 4000 also utilizes HART communica- tions, permitting access to all instrument functionality anywhere the 4-20 mA signal terminates via a HART model 275/375 handheld communicator.

The Local Operator Interface (LOI) has a lockout feature that prevents nui- sance actuation by someone brushing against the glass window, raindrops, dirt, insects, etc. This lockout mode is automatically established when no but- tons are pushed for 30 seconds (default). This countdown to lockout is con- figurable.

6-3