Rosemount 755, Instruction Manual

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C
ONTENTS
748183-H
v
Rosemount Analytical
November 1997
F
IGURES
1-1 Model 755 - Front View ............................................................................1-2
1-2 Model 755 - Location of Major Components .............................................1-4
2-1 Electrical Interonnection ...........................................................................2-3
2-2 Control Board - Adjustment Locations ......................................................2-4
2-3 Potentiometric Recorder with Non-Standard Span ...................................2-5
2-4 Model 755 Connected to Drive Current-Activated Output Devices ...........2-6
2-5 Typical Alarm Settings..............................................................................2-7
2-6 Relay Terminal Connections ....................................................................2-8
2-7 Alarm Relay Option Schematic Diagram ..................................................2-9
2-8 Connection of Typical Gas Selector Panel to Model 755..........................2-12
2-9 Installation of Purge Kit.............................................................................2-17
3-1 Control Board - Adjustment Locations ......................................................3-2
5-1 Functional Diagram of Model 755 Paramagnetic Oxygen
Measurement System ...................................................................5-2
5-2 Spherical Body in Non-Uniform Magnetic Field ........................................5-3
5-3 Detector/Magnet Assembly.......................................................................5-4
6-1 Two-Comparator OR Circuit .....................................................................6-2
6-2 Case Heater Control Circuit......................................................................6-3
6-3 Ramp Generator.......................................................................................6-3
6-4 Detector Heater Control Circuit.................................................................6-6
6-5 Detector Light Source Control Circuit .......................................................6-7
6-6 Detector with First Stage Amplifier ...........................................................6-8
6-7 Final Output Amplifier ...............................................................................6-11
6-8 Zero Suppression Module ........................................................................6-12
7-1 Locations of Case Board Test Points A, B, C and D.................................7-3
7-2 Voltage Test Points ..................................................................................7-4
7-3 Detector/Magnet Assembly.......................................................................7-6
7-4 Detector/Magnet Assembly Wiring ...........................................................7-7
7-5 Modification of 633689 Connector Board for Compatibility with
Replacement Lamp .......................................................................7-9
7-6 Lamp Alignment.........................................................................................7-9
7-7 Photocell Adjustment Voltmeter Lead Location ........................................7-10
T
ABLES
1-1 Front Panel Controls.................................................................................1-3
1-2 Range Options..........................................................................................1-3
2-1 Calibration Range for Various Operating Ranges.....................................2-11
3-1 Control Board - Adjustment Functions......................................................3-3
3-2 Calibration Range for Various Operating Ranges.....................................3-4
3-3 Oxygen Equivalents of Common Gases...................................................3-7