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460L
User Manual
Teledyne 460L User Manual
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TELEDYNE INSTRUMENTS
Table of Contents
460L Instruction Manual
iv
05228 Rev B
PRINTED DOCUMENTS ARE UNCONTROLLED
DCN 5164
9.1.1. Filter Replacement Procedure............................................................................................45
9.1.2. Mounting the Particulate Filter Externally ............................................................................46
9.2. Maintaining the Optional H
2
O Coalescing Filter ...........................................................................47
9.2.1. Draining the Optional Coalescing Filter ...............................................................................47
9.2.2. Replacing the Coalescing Membrane ..................................................................................48
9.3. UV Lamp Replacement ........................................................................................................... 49
9.4. Cleaning Exterior Surfaces of the 460L ..................................................................................... 50
9.5. Degree of Protection .............................................................................................................. 50
10. THEORY OF OPERATION............................................................................................................51
10.1. Basic O
3
Measurement Principle .............................................................................................51
10.1.1. (Beer’s Law) ................................................................................................................. 51
10.1.2. The Absorption Path ...................................................................................................... 52
10.1.3. The Reference / Measurement Cycle ................................................................................53
10.1.4. Digital Noise Filter ......................................................................................................... 54
10.2. Pneumatic Theory of Operation.............................................................................................. 55
10.2.1. Basic Pneumatic Flow And Flow Control ............................................................................55
10.2.2. Internal Pump and Flow Control.......................................................................................55
10.2.3. Optional Sample Conditioning .........................................................................................56
10.2.3.1. H
2
O Coalescing Filter ...............................................................................................56
10.2.3.2. H
2
O Vapor Dryer.....................................................................................................56
10.2.3.3. Ozone Destruct Scrubber .........................................................................................57
10.3. Electronic Theory of Operation............................................................................................... 58
10.3.1. Main Board................................................................................................................... 58
10.3.2. O
3
Sensor Module..........................................................................................................59
10.3.2.1. O
3
Sensor Components ............................................................................................ 59
10.3.2.2. Sensor Module PCA .................................................................................................60
10.3.3. CPU Board.................................................................................................................... 61
10.3.3.1. I/O Functions ......................................................................................................... 61
10.3.3.2. Status and Alarm Functions ......................................................................................61
10.3.4. Display Driver and Keyboard Assembly.............................................................................62
10.3.4.1. Keyboard............................................................................................................... 62
10.3.4.2. Display.................................................................................................................. 62
10.3.4.3. Display Driver ........................................................................................................ 62
10.3.5. Power Distribution ......................................................................................................... 63
11. TROUBLESHOOTING..................................................................................................................65
11.1. Status Output Summary ....................................................................................................... 65
11.2. Troubleshooting Using Status Outputs ....................................................................................65
11.2.1. Sensor OK.................................................................................................................... 65
11.2.2. Invalid Reading............................................................................................................. 66
11.2.3. Lamp Low .................................................................................................................... 66
11.2.4. Status LED / Status Output Troubleshooting Summary ....................................................... 66
11.3. Concentration Alarm Outputs................................................................................................. 67
11.4. Technical Assistance ............................................................................................................ 68
12. A PRIMER ON ELECTRO-STATIC DISCHARGE.............................................................................69
12.1. How Static Charges are Created............................................................................................. 69
12.2. How Electro-Static Charges Cause Damage .............................................................................70
12.3. Common Myths About ESD Damage .......................................................................................71
12.4. Basic Principles of Static Control ............................................................................................ 72
12.4.1. General Rules ............................................................................................................... 72
12.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance .......................................... 73
12.4.2.1. Working at the Instrument Rack................................................................................73
12.4.2.2. Working at an Anti-ESD Work Bench..........................................................................73
12.4.2.3. Transferring Components from Rack to Bench and Back................................................ 74
12.4.2.4. Opening Shipments from Teledyne Instruments’ Customer Service................................. 75
12.4.2.5. Packing Components for Return to Teledyne Instruments Customer Service ................... 76
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