Emerson Process Management IB106-340 System Configuration System Features, Sps, Imps

Oxymitter 4000

Instruction Manual

IB-106-340 Rev. 2.4

April, 2001

1

c. System Configuration d. System Features

Oxymitter 4000 units are available in five 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), or 12 ft (3.66 m).

The integral electronics control probe tem- perature and provide an isolated output,

4-20 mA, that is proportional to the meas- ured oxygen concentration. The power sup- ply can accept voltages of 90-250 VAC and 50/60 Hz; therefore, no setup procedures are required. The oxygen sensing cell is maintained at a constant temperature by modulating the duty cycle of the probe heater portion of the integral electronics. The integral electronics accepts millivolt signals generated by the sensing cell and produces the outputs to be used by re- motely connected devices. The output is an isolated 4-20 mA linearized current.

Two calibration gas sequencers are avail- able to the Oxymitter 4000: 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.

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)

(EXPLO VERSIONS MUST BE REMOTE MOUNTED)

26170002

Figure 1-2. Oxymitter 4000 Autocalibration

System Options

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