Emerson Process Management OXYMITTER 4000 IM-106-340 - Manual (Page 22)

Oxymitter 4000
1-4
Instruction Manual
IM-106-340, Rev. 4.0
May 2006
System Configuration Oxymitter 4000 units are available in seven length options, giving the user the
flexibility to use an in situ penetration appropriate to the size of the stack or
duct. The options on length are 18 in. (457 mm), 3 ft (0,91 m), 6 ft (1,83 m),
9 ft (2,7 m), 12 ft (3,66 m), 15 ft (4,57 m), and 18 ft (5,49 m).
The electronics control probe temperature and provide an isolated output,
4-20 mA, that is proportional to the measured oxygen concentration. The
power supply can accept voltages of 90-250 VAC and 48/62 Hz; therefore, no
setup procedures for power are required. The oxygen sensing cell is main-
tained at a constant temperature by modulating the duty cycle of the probe
heater portion of the electronics. The electronics accepts millivolt signals gen-
erated by the sensing cell and produces the outputs to be used by remotely
connected user devices. The output is an isolated 4-20 mA linearized current.
The Oxymitter 4000 transmitter is available with an integral or remote elec-
tronics package. Two calibration gas sequencers are available: the IMPS
4000 and the SPS 4001B (Figure 1-2).
Systems with multiprobe applications may employ an optional IMPS 4000
Intelligent Multiprobe Test Gas Sequencer. The IMPS 4000 provides auto-
matic calibration gas sequencing for up to four Oxymitter 4000 units and
accommodates autocalibrations based on the CALIBRATION RECOM-
MENDED signal from the Oxymitter 4000, a timed interval set up in HART or
the IMPS 4000, or whenever a calibration request is initiated.
For systems with one or two Oxymitter 4000 units per combustion process, an
optional SPS 4001B Single Probe Autocalibration Sequencer can be used
with each Oxymitter 4000 to provide automatic calibration gas sequencing.
The SPS 4001B is fully enclosed in a NEMA cabinet suited for wall-mounting.
The sequencer performs autocalibrations based on the CALIBRATION REC-
OMMENDED signal from the Oxymitter 4000, a timed interval set up in HART,
or whenever a calibration request is initiated.
System Features 1. The CALIBRATION RECOMMENDED feature detects when the sensing
cell is likely out of limits. This may eliminate the need to calibrate on a
"time since last cal" basis.
2. The cell output voltage and sensitivity increase as the oxygen
concentration decreases.