Varian ProStar 325 UV-Vis, Руководство по обслуживанию

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ProStar325 Service Manual
6
Publication date 8 May 2003
3.18 Front Panel LEDs 50
3.19 Detector States 51
3.20 Instrument performance tests 53
3.21 Flowcell 55
3.21.1 Tubing 56
3.21.2 Flowcell storage 58
3.21.3 Cleaning the flowcell 58
3.21.4 Flowcell types 59
3.22 Back pressure restrictor 60
3.23 Extended range 60
3.24 Source lamps 60
3.25 Cleaning 61
3.26 Excessive Noise and/or Drift 61
4 Electronics ............................................................64
4.1 Introduction 64
4.2 OEM power supplies 64
4.2.1 Low voltage power supplies 64
4.2.2 Deuterium (D
2
) lamp power supply 65
4.2.3 Visible lamp power supply 66
4.3 Processor PWB 67
4.3.1 Processor PWB functions 67
4.3.2 Non Volatile Data Storage 70
4.3.3 Signal processing and A to D conversion 70
4.3.4 Relay Outputs 71
4.3.5 Peak Sensing 71
4.3.6 Analog Output 71
4.3.7 Calibration 73
4.3.8 Dual Wavelength 73
4.4 Initialization Sequence 74
4.5 LEDs and diagnostic display 74
4.5.1 Seven segment displays 74
4.6 Diagnostic select switch 75
4.7 Dual Photodiode pre-amp PWB 76
4.8 LED – IrDA display PWB 77
4.9 Removal & replacement procedures 77
4.9.1 Processor PWB 77
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