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40 1100 Series DAD and MWD Reference Manual
2 How to optmize the Detector
A wide slit uses more of the light shining through the flow cell. This gives
lower baseline noise as shown in Figure 14.
However, with a wider slit, the spectrograph’s optical resolution (its ability to
distinguish between different wavelengths) diminishes. Any photodiode
receives light within a range of wavelength determined by the slit width. This
explains why the fine spectral structure of benzene disappears when using a
16-nm wide slit.
Figure 13 Benzene at 1, 4 and 16 nm slit width
Figure 14 Influence of the Slit Width on Baseline Noise
1 nm
16 nm
4 nm
Slit width 1 nm
Slit width 4 nm
Slit width 16 nm
- Agilent 1100 Series 1
- Diode Array and 1
- Multiple Wavelength 1
- Detectors 1
- In This Guide… 3
- Contents 5
- Installing the Detector 13
- Site Requirements 14
- °C/hour (3.6 °F/hour) 15
- °C/hour (1.8 °F/hour) 15
- Physical Specifications 16
- Unpacking the Detector 17
- 1 Installing the Detector 18
- Figure 1 Waste Tubing Parts 18
- Installing the Detector 1 19
- Line power switch 23
- Status indicator 23
- How to optmize the Detector 29
- Optimization Overview 31
- 2 How to optmize the Detector 32
- Figure 7 Choosing a Flow Cell 32
- Flow Cell Path Length 33
- Peak width (response time) 35
- Bandwidth 38
- Slit Width 39
- Options for storing spectra 42
- Threshold 43
- Optimizing Selectivity 44
- Status Indicators 50
- Error Messages 50
- Wavelength Recalibration 50
- Test Funct io ns 50
- Timeout 54
- Shutdown 55
- Remote Timeout 56
- Synchronization Lost 57
- Leak Sensor Open 60
- Leak Sensor Short 61
- Compensation Sensor Open 62
- Compensation Sensor Short 63
- Fan Failed 64
- Open Cover 65
- Cover Violation 66
- Visible Lamp Current 67
- Visible Lamp Voltage 68
- Communication Error 69
- Calibration Values Invalid 70
- Diode Current Leakage 71
- Holmium Oxide Test Failed 72
- UV Lamp Current 73
- UV Lamp Voltage 74
- UV Ignition Failed 75
- UV Heater Current 76
- Module Type Changed 78
- Type B, Parameter 1 or 3 79
- Assembly 80
- Heater Failed 82
- Heater Power At Limit 83
- Test Functions 85
- Holmium Oxide Test 86
- Test Failed 87
- Intensity Test 88
- Intensity Test Evaluation 89
- Cell Test 90
- Dark-Current Test 91
- Filter Test 93
- Repairing the Detector 95
- Cleaning the Detector 97
- Using the ESD Strap 98
- 4 Repairing the Detector 100
- Figure 29 Main Assemblies 100
- Simple Repairs 101
- Exchanging a Lamp 102
- • Turn the lamp on 104
- Exchanging a Flow Cell 105
- • Replace the front cover 107
- • Turn off the flow 108
- • Remove the front cover 108
- • Perform a leak test 111
- • Insert the flow cell 111
- Repairing the Detector 4 117
- Next steps: 118
- • Turn on the flow 129
- Correcting Leaks 130
- • Turn off the lamp(s) 132
- • Replace both lamps 134
- Exchanging Internal Parts 138
- • Turn off the detector 140
- • Disconnect the power cable 140
- • Disconnect capillaries 140
- AIRFLOW 149
- G1315/65A 153
- G1315/65B 153
- Exchanging the Power Supply 164
- Exchanging the Leak Sensor 167
- Replacing Status Light Pipe 170
- Assembling the Main Cover 178
- Replacing the Interface Board 179
- Agilent Technologies 181
- Overview of Main Assemblies 182
- Table 8 Main Assemblies 183
- Optical Unit Assembly 184
- Figure 36 Optical Unit Parts 185
- Standard Flow Cell 186
- Semi-Micro Flow Cell 188
- High Pressure Flow Cell 190
- Nano Flow Cells 192
- Table 1 4 Generic Parts 193
- Fan Assembly Parts 196
- Holmium Oxide Filter 197
- Coupling Lens Assembly 198
- Cell Support Assembly 200
- Control Module 201
- Plastic Parts 204
- Power and Status Light Pipes 206
- Leak Parts 207
- Accessory Kit 208
- Figure 55 Waste Tubing Parts 209
- Cable Overview 210
- Analog Cables 212
- Agilent 1100 to BNC Connector 213
- Remote Cables 215
- BCD Cables 220
- Auxiliary Cable 222
- CAN Cable 223
- External Contact Cable 224
- RS-232 Cable Kit 225
- LAN Cables 226
- Introduction to the Detector 227
- Optical System Overview 229
- Electrical Connections 232
- Instrument Layout 234
- EMF Counters 235
- Using the EMF Counters 235
- Setting the EMF Limits 236
- Electronics 237
- Main processor 238
- SIMM Memory Module 239
- Firmware 239
- Leak Sensor 239
- Fan Drive 239
- On-board Battery 239
- SCI Board 241
- A/D Converter 241
- PFP (PDA Front-end Processor) 241
- Analog Outputs 241
- Igniting the Deuterium Lamp 243
- Tungsten Lamp Voltage Control 243
- Diagnostic A/D Converter 245
- Safety Switches 245
- Interfaces 245
- Temperature Control 245
- Firmware Description 246
- Firmware Updates 247
- Subtract Dark Signal 248
- Gain Correction 248
- Rawdata File 251
- Peak Detector 251
- Optional Interface Boards 253
- Recommended Cables 255
- Analog Signal Output 257
- GPIB Interface 257
- CAN Interface 257
- Remote Interface 257
- Figure 65 RS-232 Cable 260
- GPIB Default Addresses 262
- Forced Cold Start Settings 264
- Stay-Resident Settings 265
- 1100 DAD and MWD 269
- The Analysis screen 272
- Lamp ON/OFF 272
- Setup View 273
- Settings 274
- Settings - Timetable 276
- Settings - Analog 277
- Settings - Spectrum Range 278
- Settings - Run times 278
- Signal plot 280
- Method screens 281
- System screen 282
- System - Control 282
- System - Configuration 283
- Records screen 284
- System / Error Log 284
- Info Log 285
- Firmware Update 286
- Changing the serial number 288
- Maintenance activities 289
- Diagnostics and Tests 290
- Wavelength Calibration 291
- Slit Test 293
- Specifications 295
- Performance Specifications 296
- 8 Specifications 298
- Safety Information 299
- General Safety Information 300
- Safety Symbols 302
- Lithium Batteries Information 303
- A Safety Information 304
- Radio Interference 305
- Sound Emission 306
- UV-Radiation 307
- Solvent Information 308
- *G1315-90005* 318
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