Teledyne GFC7000E Manuel d'utilisateur Page 168
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
Model GFC7000E Instruction Manual THEORY OF OPERATION
04584 Rev A1 157
calibration SLOPE and OFFSET values to produce the CO
2
concentration which is then normalized
for changes in sample pressure.
IR shining through both cells is
effected equally by interfering gas
in the Sample Chamber
M/R
is Shifted
Figure 10-5: Effects of Interfering Gas on CO2 MEAS & CO2 REF
If an interfering gas, such as H
2
O vapor is introduced into the sample chamber, the spectrum of
the IR beam is changed in a way that is identical for both the reference and the measurement
cells, but without changing the ratio between the peak heights of CO
2
MEAS and CO
2
REF. In
effect, the difference between the peak heights remains the same.
Thus, the difference in the peak heights and the resulting M/R ratio is only due to CO
2
and not to
interfering gases. In this way, Gas filter correlation rejects the effects of interfering gases and so
that the analyzer responds only to the presence of CO
2
.
To improve the signal-to-noise performance of the IR photo-detector, the GFC wheel also
incorporates an optical mask that chops the IR beam into alternating pulses of light and dark at
six times the frequency of the measure/reference signal. This limits the detection bandwidth
helping to reject interfering signals from outside this bandwidth improving the signal to noise
ration.
The IR Signal as the Photo-Detector
sees it after bein
g
chopped by the GFC
Wheel Screen
CO REF
CO
MEAS
Figure 10-6: Chopped IR Signal
- MODEL GFC7000E 1
- CARBON DIOXIDE ANALYZER 1
- SAFETY MESSAGES 2
- TABLE OF CONTENTS 3
- 04584 Rev A1 iii 4
- 04584 Rev A1 iv 5
- 04584 Rev A1 v 6
- 04584 Rev A1 vi 7
- LIST OF APPENDICES 8
- LIST OF FIGURES 8
- LIST OF TABLES 9
- User Notes 11
- 1. MGFC7000E DOCUMENTATION 12
- WARRANTY 16
- 2.2. CE Mark Compliance 17
- 2.3. Warranty 17
- 3. GETTING STARTED 20
- Shipping 21
- Basic Pneumatic Connections 26
- 3.2. Initial Operation 32
- 3.2.1. Startup 33
- 3.2.2. Warm Up 34
- 3.2.3. Warning Messages 35
- 3.2.4. Functional Check 36
- 04584 Rev A1 27 38
- SAMPLE CHAMBER 42
- 4.1. FAQ’s 44
- 4.2. Glossary 45
- (Normal State) 49
- Scrubber 51
- (Option 51) 51
- 5.5. Communication Options 52
- 5.6. Additional Manuals 53
- 5.8. Dilution Ratio Option 54
- 5.9. Maintenance Mode Switch 54
- 6. OPERATING INSTRUCTIONS 56
- 6.2. Sample Mode 57
- OFFSET 58
- 6.2.2. Warning Messages 59
- 6.3. Calibration Mode 61
- 6.4. SETUP Mode 63
- Configuration Information 64
- Continue to press 66
- until … 66
- Configuration 67
- 6.7.2. Reporting Range Modes 68
- 04584 Rev A1 59 70
- 6.7.6. Range Units 73
- 6.7.7. Dilution Ratio 74
- 04584 Rev A1 65 76
- 6.9.2. Signal I/O 78
- ANALOG OUT 81
- See Table 3-1 for 85
- IN OUT 86
- 6.9.5. Electric Test 88
- 6.9.6. Dark Calibration Test 89
- Repeat Pressing 89
- until . . 89
- 6.9.7. Pressure Calibration 89
- Communication Ports 93
- EXAMPLE 99
- 6.10.8. COM Port Testing 100
- From Step 1 above) 104
- Contact your IT 104
- Network Administrator 104
- KEY FUNCTION 105
- >\ 105
- Alarms 106
- 6.12.1. iDAS Structure 107
- 6.12.1.1. iDAS Channels 108
- 6.12.1.2. iDAS Parameters 109
- VIEW KEYPAD FUNCTIONS 114
- Editing iDAS Data Channels 115
- Trigger Events 116
- Editing iDAS Parameters 117
- (see previous section) 118
- 6.12.2.6. Number of Records 120
- RS-232 Report Function 121
- 6.12.2.8. Compact Report 122
- 6.12.2.9. Starting Date 122
- 6.12.2.11. HOLDOFF Feature 123
- 6.13.1.1. Status Outputs 126
- 6.13.1.2. Control Inputs 127
- Terminal Operating Modes 128
- 6.13.2.3. Command Syntax 129
- 6.13.2.4. Data Types 130
- 6.13.2.5. Status Reporting 131
- PRIMARY SETUP MENU 132
- COM Port Password Security 133
- Activating Hessen Protocol 135
- Hessen Protocol Gas ID 137
- 7. CALIBRATION PROCEDURES 140
- GFC7000E 141
- Continue Calibration as per 149
- Standard Procedure 149
- 04584 Rev A1 141 152
- To program the Sequence: 152
- 8. EPA PROTOCOL CALIBRATION 154
- 9.1. Maintenance Schedule 156
- Warn-up 158
- 9.3. Maintenance Procedures 159
- 9.3.3.2. Pressure Leak Check 161
- 10.1. Measurement Method 164
- with CO 166
- CO2 MEAS 167
- 10.2. Pneumatic Operation 169
- 10.2.1. Sample Gas Flow 170
- Sample Pressure Sensor 171
- Sample Flow Sensor 171
- 10.3. Electronic Operation 172
- 10.3.2. CPU 174
- 10.3.3.2. IR Source 175
- 10.3.3.3. GFC Wheel 175
- 10.3.3.4. IR Photo-Detector 176
- 10.3.4.1. Overview 176
- 10.3.4.3. Phase Lock Warning 178
- 10.3.5. Relay Board 179
- 10.3.5.1. Status LED’s 180
- STATUS LED’s 181
- DC VOLTAGE TEST 181
- RELAY PCA 181
- PN 04135 181
- 10.3.6.2. Sensor Inputs 182
- 10.3.6.4. Analog Outputs 183
- 10.3.7. I 184
- C Data Bus 184
- 10.4. Interface 185
- TST> CAL 186
- 10.4.1.2. Keyboard 187
- 10.4.1.3. Display 187
- Key Press 188
- 10.5. Software Operation 189
- 10.5.1. Adaptive Filter 190
- MSG CLR SETUP 195
- (As Displayed) 198
- CPU Status Indicator 200
- Mother Board 201
- P/N 04069 201
- CPU Status LED 201
- Relay Board Status LED’s 202
- 11.1.5. Gas Flow Problems 203
- 11.1.6.1. Flow is Zero 204
- 11.1.6.2. Low Flow 204
- 11.1.6.3. High Flow 205
- 11.1.6.6. Sample Pump 205
- 11.2. Calibration Problems 206
- 11.3.1.2. Bench Temperature 208
- 11.3.2. Excessive Noise 209
- 11.4. Subsystem Checkout 210
- 11.4.3. I 211
- 11.4.2. DC Power Supply 211
- 11.4.5. Relay Board 212
- 11.4.6. Sensor Assembly 213
- 11.4.6.3. GFC Wheel Drive 214
- 11.4.6.4. IR Source 214
- 11.4.7. Motherboard 215
- 11.4.7.4. Status Outputs 216
- 11.4.8. CPU 217
- 11.5. Repair Procedures 218
- 04584 Rev A1 214 225
- 04584 Rev A1 215 226
- 12.4.1. General Rules 227
- 04584 Rev A1 218 229
- 04584 Rev A1 219 230
- 04584 Rev A1 220 231
- 045840110 Rev B.3 223 234
- 045840110 Rev B.3 224 235
- 045840110 Rev B.3 225 236
- 045840110 Rev B.3 226 237
- 045840110 Rev B.3 227 238
- 045840110 Rev B.3 228 239
- 045840110 Rev B.3 229 240
- 045840110 Rev B.3 230 241
- 045840110 Rev B.3 231 242
- 045840110 Rev B.3 232 243
- CO_SPAN2 Conc. 40, 400 244
- RANGE_MODE — SNGL 244
- 045840110 Rev B.3 234 245
- 045840110 Rev B.3 235 246
- 045840110 Rev B.3 236 247
- 045840110 Rev B.3 237 248
- 045840110 Rev B.3 238 249
- computed during zero/span 250
- 045840110 Rev B.3 240 251
- 045840110 Rev B.3 241 252
- 045840110 Rev B.3 242 253
- 045840110 Rev B.3 243 254
- 045840110 Rev B.3 244 255
- 045840110 Rev B.3 245 256
- 045840110 Rev B.3 246 257
- 045840110 Rev B.3 247 258
- 048450130 Rev A1 251 262
- 045150130 Rev A1 252 263
- 045840140 Rev A1 253 264
- 04584 Rev A1 254 265
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