Emerson Process Management 755R LIST OF ILLUSTRATIONS

Model 755R

Instruction Manual

748213-S April 2002

6-5	Replacement Of Detector/Magnet Components ...................................................................		6-5
	a.	Source Lamp...................................................................................................................	6-5
	b.	Photocell .........................................................................................................................	6-5
	c.	Detector...........................................................................................................................	6-7
6-6	Control Board Setup ..............................................................................................................		6-7
	a.	Power Supply Test..........................................................................................................	6-7
	b.	Detector zero...................................................................................................................	6-7
	c.	U4 Zero ...........................................................................................................................	6-8
	d.	U8 Zero ...........................................................................................................................	6-8
	e.	U10 Zero .........................................................................................................................	6-8
	f.	Fullscale ..........................................................................................................................	6-8
	g.	Recorder Fullscale ..........................................................................................................	6-8
7-0	REPLACEMENT PARTS ......................................................................................................		7-1
7-1	Circuit Board Replacement Policy.........................................................................................		7-1
7-2	Matrix – Model 755R Oxygen Analyzer.................................................................................		7-2
7-3	Selected Replacement Parts.................................................................................................		7-3
8-0	RETURN OF MATERIAL ......................................................................................................		8-1
8-1	Return Of Material .................................................................................................................		8-1
8-2	Customer Service ..................................................................................................................		8-1
8-3	Training..................................................................................................................................		8-1

LIST OF ILLUSTRATIONS

Figure 1-1. Model 755R Oxygen Analyzer – Front Panel ........................................................		1-1
Figure 2-1. Interconnect of Typical Gas Manifold to Model 755R............................................		2-3
Figure 2-2. Model 755R Rear Panel ........................................................................................		2-5
Figure 2-3. Connections for Potentiometric Recorder with Non-Standard Span .....................		2-6
Figure 2-4. Model 755R Connected to Drive Several Current-Actuated Output Devices........		2-7
Figure 2-5. Relay Terminal Connections for Typical Fail-Safe Applications............................		2-8
Figure 2-6. Typical Alarm Settings .........................................................................................		2-10
Figure 2-7. Alarm Relay Assembly Schematic Diagram ........................................................		2-11
Figure 3-1. Control Board - Adjustment Locations...................................................................		3-3
Figure 3-2. Dial Settings for Alarm Setpoint Adjustments........................................................		3-7
Figure 4-1. Functional Diagram of Paramagnetic Oxygen Measurement System...................		4-3
Figure 4-2. Spherical Body in Non-Uniform Magnetic Field.....................................................		4-4
Figure 4-3.	Detector/Magnet Assembly....................................................................................	4-7
Figure 5-1. Two-Comparator OR Circuit ..................................................................................		5-2
Figure 5-2. Case Heater Control Circuit...................................................................................		5-3
Figure 5-3. Ramp Generator Circuit.........................................................................................		5-3
Figure 5-4. Detector Heater Control Circuit..............................................................................		5-6
Figure 5-5. Detector Light Source Control Circuit ....................................................................		5-7
Figure 5-6. Detector with First Stage Amplifier ........................................................................		5-9
Figure 5-7. Buffer, Anticipation, and Digital Output Circuits...................................................		5-10
Figure 5-8. Simplified Analog Recorder Output Circuit ..........................................................		5-12
Figure 6-1.	Detector/Magnet Assembly....................................................................................	6-3
Figure 6-2.	Pin/Lead Removal .................................................................................................	6-4
Figure 6-3. Detector Optical Bench..........................................................................................		6-4
Figure 6-4.	Lamp Replacement................................................................................................	6-6

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