Emerson Rosemount Oxymitter 4000 Reference Manual page 16

Rosemount Oxymitter 4000
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CAUTION
Accessing the probe keypad requires opening the electronics housing. Opening the
electronics housing will cause the loss of ALL hazardous permits. Opening the
electronics housing in hazardous areas may cause an explosion resulting in loss of
property, severe personal injury, or death. It may be required to get a hot work permit
from your company safety officer before opening the electronic housing.
Membrane Keypad
The membrane keypad, housed within the right side of the electronics housing, provides
fault indication by way of flashing LEDs. Calibration can be performed from the
membrane keypad.
Local Operator Interface (LOI)
The optional LOI takes the place of the membrane keypad and allows local
communication with the electronics. Refer to Section 4, Configuration of Hazardous Area
Oxymitter 4000 with LOI for more information.
WARNING
The HART option is not protected by energy limiting barriers. It must not be interfaced
from within the hazardous area. The 4-20 mA cables should be routed and the
connections made outside the hazardous area. Note that this is the case even when using
the intrinsically safe version of the hand-held communicator.
Optional HART Interface
The Hazardous Area Oxymitter 4000's 4-20 mA output line transmits an analog signal
proportional to the oxygen level. The HART output is superimposed on the 4-20 mA
output signal. This information can be accessed through the following:
• Rosemount Model 275/375 Handheld Communicator - The handheld
communicator requires Device Description (DD) software specific to the
Hazardous Area Oxymitter 4000. The DD software will be supplied with many
Model 275/375 units but can also be programmed into existing units at most
Emerson service offices. See Section 7, HART/AMS for
additional information.
• Personal Computer (PC) - The use of a personal computer requires AMS software
available from Emerson.
• Selected Distributed Control Systems - The use of distributed control systems
requires input/output (I/O) hardware and AMS software which permit HART
communications.
Optional IMPS 4000
The Programmable Logic Controller (PLC) in the IMPS 4000 provides fault indications
using flashing LEDs and LCD display messages. Refer to the IMPS 4000 Intelligent
Multiprobe Test Gas Sequencer manual for more information.
The optional Rosemount 751 remote mounted LCD display panel is loop driven
by the 4-20 mA output signal representing the O percentage.
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Description and Components
July 2018