Waters 2410 User manual

Waters
Refractometer
Service Manual
Waters Corporation
Service Communications
34 Maple Street
Milford, MA 01757
Manual Number 071604
Rev. 4, May 1998

Blank Page

REFRACTOMETER SERVICE MANUAL
TABLE OF CONTENTS
CHAPTER 1 - INTRODUCTION
Refractive Index Detectors ......................................................................................................................1-1
Performance Specifications of LC Detectors............................................................................................1-2
Comparative Refractometer Specifications ..............................................................................................1-4
Solvent Degassing for Liquid Chromatography........................................................................................l-6
CHAPTER 2 - M410 GENERAL INFORMATION
M410 Features........................................................................................................................................2-1
CHAPTER 3 - M410 START UP
Pre Start Up Requirements......................................................................................................................3-1
Start Up Kit ............................................................................................................................................3-1
Fluid Connections ..................................................................................................................................3-2
Interfacing Connections ..........................................................................................................................3-4
Start Up Check Sheet .............................................................................................................................3-6
Choosing Sensitivity and Scale Factor Values .......................................................................................3-11
CHAPTER 4 - M410 FRONT AND REAR PANEL
Front Panel General Information..............................................................................................................4-l
Front Panel Control ................................................................................................................................4-4
Front Panel Assembly.............................................................................................................................4-8
Front Panel Schematics...........................................................................................................................4-9
Rear Panel Connections ........................................................................................................................4-10
Rear Panel Assembly.............................................................................................................................4-13
Rear Panel.............................................................................................................................................4-14
Rear Panel - Oven Compartment...........................................................................................................4-15
Refractometer Power Wiring.................................................................................................................4-16
CHAPTER 5 - M410 OPTICS ASSEMBLY
Optics Assembly Location.......................................................................................................................5-1
Optics Assembly General Description .....................................................................................................5-2
LED Light Source...................................................................................................................................5-3
Photodetector Assembly..........................................................................................................................5-4
Flow Cell End Cap Assembly..................................................................................................................5-5
Counter Current Heat Exchanger ............................................................................................................5-6
CHAPTER 6 - M410 CONTROL BOARD
Control Board Functional Description.....................................................................................................6-1
Control Board Assembly Drawing...........................................................................................................6-3
Control Board Potentiometer Adjustments...............................................................................................6-4
Control Board Test Points.......................................................................................................................6-5
Control Board Assembly Drawing...........................................................................................................6-6
Control Board Schematics.....................................................................................................................6-13

TABLE OF CONTENTS cont.
CHAPTER 7 - M410 ANALOG BOARD
Analog Board Functional Description .....................................................................................................7-1
Amplifier Circuit Block Diagram............................................................................................................7-2
Analog Board Block Diagram.................................................................................................................7-3
Analog Board Potentiometer Adjustments...............................................................................................7-4
Analog Board Assembly Drawing...........................................................................................................7-6
Analog Board Schematics.......................................................................................................................7-8
CHAPTER 8 - M410 SERVICE PROCEDURES
M410 General Troub1eshooting..............................................................................................................8-1
Troubleshooting Guide - Electronic Problems.........................................................................................8-4
Diagnostics............................................................................................................................................. 8-9
Optics Bench Assembly Replacement Procedure ................................................................................... 8-11
Flow Cell End Cap Assembly Replacement........................................................................................... 8-14
LED Assembly Replacement................................................................................................................. 8-18
Photodiode Assembly Replacement....................................................................................................... 8-20
Optical Alignment Procedure................................................................................................................ 8-22
Counter Current Heat Exchanger Replacement ..................................................................................... 8-24
RTD Sensor Replacement ..................................................................................................................... 8-26
Heater Replacement.............................................................................................................................. 8-27
Solenoid Valve Replacement................................................................................................................. 8-30
Oven Fan Replacement .........................................................................................................................8-31
Control Board Replacement .................................................................................................................. 8-33
Analog Board Replacement................................................................................................................... 8-35
M410 Test Specifications...................................................................................................................... 8-37
M410 Bandspread................................................................................................................................. 8-38
Lift Test (Sensitivity Test)..................................................................................................................... 8-39
CHAPTER 9 - M410 SPARE PARTS WARRANTY
M410 Common Replacement Parts.........................................................................................................9-1
Optics Assembly Exploded Diagram .......................................................................................................9-2
Optics Bench Assembly Drawing............................................................................................................ 9-4
Complete Parts List................................................................................................................................. 9-5
Warranty Statement.............................................................................................................................. 9-30
CHAPTER 10 - R401 GENERAL INFORMATION
R401 General Description..................................................................................................................... 10-1
R401 Functional Description................................................................................................................. 10-3
Refractometer Modes............................................................................................................................ 10-7
Refractometer Temperature Control...................................................................................................... 10-8
R401 Troubleshooting........................................................................................................................... 10-9
CHAPTER 11 - R401 START UP
Check Out Procedure ............................................................................................................................ 11-1
Fluid Connections................................................................................................................................. 11-2
Connecting the R401 to a Data Module................................................................................................. 11-3