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RGA Command Set 3-57
Technical Reference
This query command can be used to determine whether the CDEM option is installed in the RGA unit
being programmed: A CDEM option is available if Bit 7 of CEM_ERR is cleared when the byte is queried
(See also MO command).
Parameters: This command is a query, and can only have one parameter format:
EM?
Error checking:
The only acceptable parameter is a question mark.
The absence of a parameter (i. e. EM) is treated as a bad-parameter error.
EP?
Description: PS_ERR Byte Query.
Echo: PS_ERR Byte.
Query the value of PS_ERR and update its value after running a fresh check on the 24V External Power
Supply (Bit6 of STATUS and the PS_ERR byte are updated based on the tests results). The PS_ERR
byte value is returned to the computer in ASCII format and with a <LF><CR> terminator. No errors are
present as long as the byte value is zero.
Consult the Error Byte Definitions section of this chapter for detatils on the different error bytes of the
RGA.
Consult the RGA Troubleshooting chapter of this manual for possible causes and solutions to any problems
reported.
Always try the query a second time before declaring a hardware problem.
Parameters: This command is a query, and can only have one parameter format:
EP?
Error checking:
The only acceptable parameter is a question mark.
The absence of a parameter (i. e. EP) is treated as a bad-parameter error.
EQ?
Description: QMF_ERR Byte Query.
Echo: QMF_ERROR Byte.
Query the value of QMF_ERR and update its value after running a fresh check on the Quadrupole Mass
Filter’s RF Power Supply (Bit4 of STATUS and the QMF_ERR byte are updated based on the tests
- QMS 100 Series 1
- Gas Analyzer 1
- Table of Contents 3
- Fast Start 6
- Specifications 7
- Calibration Log 10
- Chapter 1 11
- Introduction & Operation 11
- External Connections 13
- What’s Inside ? 14
- What’s Inside ? 1–5 15
- SRS QMS Gas Analyzer 15
- Mass Spectrometer 16
- Operation 17
- Front Panel Operation 18
- Controller State Diagram 19
- Continuous Sample Mode 20
- Operation 1–11 21
- Batch Analyze Mode 22
- Microcontroller Error Checks 23
- 1–14 Operation 24
- Operation 1–15 25
- Mass Spectrometry Basics 26
- Overview 33
- System Requirements 34
- Getting Started 34
- Starting the RGA Software 35
- Connecting to a Head 35
- Shutting Down the RGA System 35
- Features and Operation 36
- SRS QMS Gas Analyzer 37
- Data Acquisition 40
- Scan Data Logging 41
- Graph Management 41
- Head Management 42
- Sensitivity Factors 42
- Spectrum Analysis 42
- RGA Head and Scan Parameters 43
- Changing Head Parameters 44
- Changing Scan Trigger Rates 44
- Display Modes 45
- Changing Display Modes 46
- Manual Scaling of Graphs 46
- General Utilities 47
- Scheduled Saving of Data 48
- Analyzing the Mass Spectrum 49
- Pressure Reduction 50
- Tuning the RGA Sensitivity 50
- Adjusting the CEM Gain 51
- Peak Tuning the RGA Head 52
- RGA On-line Help 53
- Commonly Asked Questions 54
- Sample Scans 54
- Chapter 3 55
- Measurement Techniques 55
- Calibration 56
- Effect of Total Pressure 57
- 3-4 Calibration 58
- P = ion current (A) 59
- 3-6 Calibration 60
- Calibration 3-7 61
- User’s Manual 61
- Peak Tuning Procedure 62
- Calibration 3-9 63
- 3-10 Calibration 64
- ∆m amu in the 66
- ∆m amu in 66
- ∆m * 28 67
- Calibration 3-15 69
- Techniques 70
- Techniques 3-17 71
- 3-18 Techniques 72
- Glossary 73
- References 78
- Materials List 87
- Command List 88
- Principles of Operation 91
- Overall System 93
- Structure 94
- Pressure Reducing Inlet 95
- Flow Calculations 96
- Diaphragm Pump 98
- Turbo Pump 99
- Capillary Design 100
- Materials and Fittings 102
- Extensions 103
- Chapter 2 104
- Quadrupole Spectrometer 104
- Introduction 105
- RS232/DCE/28.8k Connector 106
- Calibration Lockout 106
- 2-4 ECU 107
- SRS QMS Gas Analyzer 107
- Electrometer 108
- 2-6 Electrometer 109
- Mass Filter Power Supply 110
- Description 111
- Principle of operation 112
- Parameter Settings 113
- Ionizer 2-11 114
- Technical Reference 114
- Quadrupole mass filter 115
- Zero Blast Suppression 119
- Ion Detector 120
- Faraday Cup operation 121
- Electron Multiplier Operation 121
- Ion Detector 2-19 122
- 2-20 Ion Detector 123
- Ion Detector 2-21 124
- In This Chapter 125
- The RGA COM Utility 128
- Command Syntax 129
- Programming tips 130
- Communication Errors 131
- Jumper Protection Violation 132
- Programming the RGA ECU 133
- Programming the Ionizer 134
- Programming the Detector 135
- Setting up Analog Scans 137
- Setting up Histogram Scans 138
- Single Mass Measurements 140
- Total Pressure Measurements 142
- Error Checking the RGA 145
- RGA Command Set 149
- Initialization Commands 150
- RGA Command Set 3-27 151
- Ionizer Control Commands 152
- RGA Command Set 3-29 153
- 3-30 RGA Command Set 154
- IEparam, param: 0,1, *, ? 155
- 3-32 RGA Command Set 156
- RGA Command Set 3-33 157
- Detection Control Commands 158
- RGA Command Set 3-35 159
- 3-36 RGA Command Set 160
- RGA Command Set 3-37 161
- NFparam, param: 0 - 7, *, ? 162
- RGA Command Set 3-39 163
- Scan and Measurement Commands 164
- HSparam, param:0 - 255,* 165
- 3-42 RGA Command Set 166
- RGA Command Set 3-43 167
- MRparam, param:0 - M_MAX 168
- RGA Command Set 3-45 169
- 3-46 RGA Command Set 170
- SC[param], param: 0 - 255, * 171
- 3-48 RGA Command Set 172
- TP?, TP0, TP1 173
- 3-50 RGA Command Set 174
- Parameter Storage Commands 175
- 3-52 RGA Command Set 176
- RGA Command Set 3-53 177
- Mass Filter Control Commands 178
- Error Reporting Commands 179
- 3-56 RGA Command Set 180
- RGA Command Set 3-57 181
- 3-58 RGA Command Set 182
- Error checking: 183
- Tuning Commands 184
- RGA Command Set 3-61 185
- 3-62 RGA Command Set 186
- RGA Command Set 3-63 187
- 3-64 RGA Command Set 188
- RGA Command Set 3-65 189
- Error Byte Definitions 190
- Error Byte Definitions 3-67 191
- Error Byte Definitions 3-69 193
- Chapter 4 194
- Trouble Shooting 194
- System Problems 195
- Nothing Operates 196
- 24V DC Power Supply 198
- Quadrupole Mass Filter RF P/S 199
- Windows Software Error Codes 201
- Chapter 5 208
- Service 208
- Warnings! 209
- Component Notes 210
- CDEM Handling and Care 212
- CDEM Pre-conditioning 213
- Accessing Internal Components 214
- Internal View 215
- • Phillips screwdriver 216
- Equipment 217
- Procedure 217
- General Checks 218
- Cleaning 220
- Ionizer Degas 221
- CDEM Cleaning 221
- Quadrupole Filter Cleaning 222
- Cleaning 5-17 224
- 5-18 Cleaning 225
- Cleaning 5-19 226
- Component Replacement 227
- Component Replacement 5-21 228
- 5-22 Component Replacement 229
- Filament Replacement 230
- Handling Notes 230
- 5-24 Component Replacement 231
- CDEM Replacement 232
- 5-26 Component Replacement 233
- Component Replacement 5-27 234
- Figure 5 CDEM Replacement 234
- Replacement Parts 235
- Factory Service 236
- Description of Schematics 238
- Schematic: MCA_C2 239
- Schematic: MCA_D1 239
- Parts List 240
- Parts List A-5 241
- A-6 Parts List 242
- Parts List A-7 243
- Overview of the RGA 246
- Circuit Description 247
- Circuit Boards 248
- Description of Schematics 249
- B-8 Description of Schematics 251
- Schematic name: QMSE_T2 252
- Schematic name: QMSE_T3 253
- Schematic name: QMSE_B1 255
- Schematic name: QMSE_B2 256
- Schematic name: QMSE_B3 258
- Schematic name: QMSE_V1 258
- Schematic name: QMSE_V2 260
- Top Board Parts List 261
- Parts Lists B-19 262
- B-20 Parts Lists 263
- Parts Lists B-21 264
- B-22 Parts Lists 265
- Bottom Board Parts List 266
- B-24 Parts Lists 267
- Parts Lists B-25 268
- B-26 Parts Lists 269
- Parts Lists B-27 270
- B-28 Parts Lists 271
- Parts Lists B-29 272
- Vertical Board Parts List 273
- Parts Lists B-31 274
- B-32 Parts Lists 275
- Parts Lists B-33 276
- Appendix C 277
- Drawings & Schematics 277
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