Specifications

CONTENTS
748414-A
August 1999
iii
Heated Flame Ionization Detector Analyzer Module
Rosemount Analytical NGA 2000
S
ECTION
4. M
AINTENANCE AND
T
ROUBLESHOOTING
4.1 Overview....................................................................................................27
4.2 Component replacement...........................................................................28
4.2.1 Oven ......................................................................................28
4.2.1.1 Oven Removal ...............................................................28
4.2.1.2 Oven Disassembly .........................................................30
4.2.2 Burner Sensor, Detectors and Ignitor ............................................32
4.2.2.1 Temperature Sensor......................................................32
4.2.2.2 RTD Detector.................................................................32
4.2.2.3 Ignitor.............................................................................32
4.2.2.4 Flameout Sensor............................................................33
4.2.3 Burner Internal Components..........................................................34
4.2.3.1 Disassembly of Burner/Thermal Block...........................34
4.2.3.2 Replacing Burner Jets....................................................35
4.2.4 Thermal Block................................................................................38
4.2.4.1 Sample RTD ..................................................................38
4.2.4.2 Cartridge Heater.............................................................39
4.2.4.3 Thermostat.....................................................................39
4.2.4.4 Sample Capillary............................................................39
4.2.5 Electronics Assembly.....................................................................41
4.2.5.1 Printed Circuit Boards....................................................42
4.2.5.2 Case Temperature Sensor.............................................43
4.2.5.3 Case Pressure Purge Switch .........................................44
4.2.5.4 Preamp Assembly..........................................................45
4.2.6 Fan Assembly ................................................................................46
4.2.7 Flow Controller...............................................................................47
4.2.8 DC Power Supply Module..............................................................49
4.2.9 Front Panel Components...............................................................50
4.2.9.1 Replacing Front Panel Components ..............................51
4.2.10 Rear Panel Components..............................................................55
4.3 Troubleshooting Checklist .........................................................................58
4.3.1 Safety System................................................................................58
4.3.2 Ignition ......................................................................................58
4.3.3 Drift ......................................................................................59
4.3.4 Noise ......................................................................................60