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1100 Series DAD and MWD Reference Manual 43
How to optmize the Detector 2
Threshold
Sets the peak detector. Only spectra from peaks higher than threshold will be
stored when a peak-controlled storage mode is selected.
Margin for Negative Absorbance
The detector adjusts its gain during balance such that the baseline may drift
slightly negative (about -100 mAU). In some special case, for example, when
gradient with absorbing solvents are used, the baseline may drift to more
negative values.
Only for such cases, increase the margin for negative absorbance to avoid
overflow of the analog-to-digital converter.
- 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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