Rosemount Oxymitter 5000, Instruction Manual

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Instruction Manual
IM-106-350C, Rev 2.2
July 2008
4-5
Hazardous Area Oxymitter 5000
Of the ten modes in Table 4-1, mode 1 through mode 7 are the alarm modes.
The factory default is mode 5 for Hazardous Area Oxymitter 5000 units
without an IMPS 4000 or SPS 4001B. In this mode, the output will signal
when a unit alarm or a CALIBRATION RECOMMENDED indication occurs.
Calibration Handshake Signal
If using an optional IMPS 4000 or SPS 4001B, the logic I/O must be
configured for calibration handshaking. Of the ten modes in Table 4-1, only
modes 8 and 9 are configured for calibration handshaking. For a Hazardous
Area Oxymitter 5000 with an IMPS 4000 or an SPS 4001B, the factory sets
the default to mode 8. In this mode, the logic I/O will be used to communicate
between the Hazardous Area Oxymitter 5000 and the sequencer and to signal
the sequencer when a CALIBRATION RECOMMENDED indication occurs.
Table 4-1. Logic I/O
Configuration
*The default condition for a Hazardous Area Oxymitter 5000 without an IMPS 4000 or
SPS 4001B.
**The default condition for a Hazardous Area Oxymitter 5000 with an IMPS 4000 or SPS 4001B.
Recommended
Configuration
Fieldbus Signal Upon Critical Alarm
Emerson Process Management recommends that the factory default be
utilized. When a critical alarm occurs which causes the O
2
reading to become
unstable or unreliable, the Oxymitter will flag the O
2
reading. All further O
2
readings will be flagged as Out Of Service until the problem has been
corrected.
If the O
2
measurement is being utilized as part of an automatic control loop,
the loop should be placed into manual upon this failure event or other
appropriate action should be taken.
Mode Configuration
0 The unit is not configured for any alarm condition.
1 The unit is configured for a Unit Alarm.
2 The unit is configured for Low O
2
.
3 The unit is configured for both a Unit Alarm and Low O
2
.
4 The unit is configured for a High AC Impedance/CALIBRATION
RECOMMENDED.
5* The unit is configured for both a Unit Alarm and a High AC
Impedance/CALIBRATION RECOMMENDED.
6 The unit is configured for both a Low O
2
and High AC Impedance/CALIBRATION
RECOMMENDED.
7 The unit is configured for a Unit Alarm, a Low O
2
, and a High AC
Impedance/CALIBRATION RECOMMENDED.
8** The unit is configured for a calibration handshake with IMPS 4000 or SPS 4001B.
CALIBRATION RECOMMENDED will initiate the calibration cycle.
9 The unit is configured for a calibration handshake. CALIBRATION
RECOMMENDED will not initiate the calibration cycle with the IMPS 4000 or SPS
4001B.