Emerson 4000 manual Oxymitter Integrally Mounted, Remote Mounted

Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 3.0 December 2003

c.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 are re- quired. 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 elec- tronics accepts millivolt signals generated by the sensing cell and produces the out- puts 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 electronics pack- age. Two calibration gas sequencers are available: the IMPS 4000 and the SPS 4000 (Figure 1-2).

Systems with multiprobe applications may employ an optional IMPS 4000 Intelligent Multiprobe Test Gas Sequencer. The IMPS 4000 provides automatic calibration gas se- quencing for up to four Oxymitter 4000 units and accommodates autocalibrations based on the CALIBRATION RECOMMENDED signal from the Oxymitter 4000, a timed in- terval 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 4000 Single Probe Autocalibration Se- quencer can be used with each Oxymitter 4000 to provide automatic calibration gas sequencing. The SPS 4000 can be mounted directly to the Oxymitter 4000 or in a remote location if space is limited. The sequencer performs autocalibrations based on the CALIBRATION RECOMMENDED

signal from the Oxymitter 4000, a timed in- terval set up in HART, or whenever a cali- bration request is initiated.

d.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.

OXYMITTER 4000

INTEGRALLY

MOUNTED

SPS 4000

(1 PROBE)

INTEGRAL OR

REMOTE

IMPS 4000

(1 TO 4 PROBES)

REMOTE MOUNTED

SPS 4000

(1 PROBE)

37260039

Figure 1-2. Oxymitter 4000 Autocalibration

System Options

Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-3