Emerson Process Management OXYMITTER 4000 instruction manual System Features, Membrane Keypad

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

Hazardous Area Oxymitter 4000

For systems with one or two Hazardous Area Oxymitter 4000 units per combustion process, an optional remote mounted SPS 4000 Single Probe Autocalibration Sequencer can be used with each Hazard- ous Area Oxymitter 4000 to provide auto- matic calibration gas sequencing. The sequencer performs autocalibrations based on the CALIBRATION RECOMMENDED signal from the Hazardous Area Oxymitter 4000, a timed interval set up in HART, or whenever a calibration 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.

The HART option is not protected by energy limiting barriers. It must not be interfaced from within the hazardous area. The 4-20 mA cables should be routed and the connections made out- side the hazardous area. Note that this is the case even when using the in- trinsically safe version of the handheld communicator.

3.Membrane keypad Figure 1-3and HART communication are standard. To use the HART capability, you must have either:

(a)HART Model 275/375 Communi- cator.

(b)Asset Management Solutions (AMS) software for the PC.

4.An optional Local Operator Interface Figure 1-4allows continual O2 display and full interface capability.

HEATER T/C

DIAGNOSTIC HEATER

ALARMS 02 CELL

CALIBRATION

CALIBRATION RECOMMENDED

			02 CELL mV +
TEST			02 CELL mv -
POINTS			HEATER T/C +
			HEATER T/C -
INC	INC				CAL
HIGH	LOW
GAS	GAS
				TEST GAS +
DEC	DEC
				PROCESS -
		% 02

MEMBRANE

KEYPAD

37260003

Figure 1-3. Membrane Keypad

37260004

Figure 1-4. Local Operator Interface (LOI)

1-4 Description and Specifications Rosemount Analytical Inc. A Division of Emerson Process Management