Emerson Process Management IM-106-340 instruction manual System Configuration System Features

Oxymitter 4000

Instruction Manual

IM-106-340, Rev. 4.0 May 2006

System Configuration

System Features

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.

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.

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