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Table of Contents
Model 400E Ozone Analyzer
Instruction Manual
vi
P/N 04316 Rev: B
8.4.1.
Linearity Test....................................................................................................................... 194
8.4.2.
O
3
Loss Correction Factor .................................................................................................. 195
8.4.3.
Span Drift Check................................................................................................................. 196
8.5.
A
UDITING
P
ROCEDURES
................................................................................................................ 197
8.5.1.
Multipoint Calibration Audit ................................................................................................. 197
8.5.2.
Data Processing Audit ........................................................................................................ 198
8.5.3.
System Audit ....................................................................................................................... 199
8.5.4.
Assessment of Monitoring Data for Precision and Accuracy............................................. 199
8.6.
S
UMMARY OF
Q
UALITY
A
SSURANCE
C
HECKS
................................................................................. 199
8.7.
R
EFERENCES
................................................................................................................................. 203
9. MAINTENANCE SCHEDULE & PROCEDURES...........................................205
9.1.
M
AINTENANCE
S
CHEDULE
.............................................................................................................. 205
9.2.
P
REDICTING
F
AILURES
U
SING THE
T
EST
F
UNCTIONS
..................................................................... 207
9.3.
M
AINTENANCE
P
ROCEDURES
......................................................................................................... 208
9.3.1.
Replacing the Sample Particulate Filter ............................................................................. 208
9.3.2.
Rebuilding the Sample Pump............................................................................................. 209
9.3.3.
Replacing the IZS Zero Air Scrubber ................................................................................. 210
9.3.4.
Performing Leak Checks .................................................................................................... 211
9.3.5.
Performing a Sample Flow Check...................................................................................... 213
9.3.6.
Flow Calibration .................................................................................................................. 214
9.3.7.
Cleaning the Absorption Tube ............................................................................................ 215
10. THEORY OF OPERAT ION............................................................................217
10.1.
M
EASUREMENT
M
ETHOD
............................................................................................................. 218
10.1.1.
Calculating O
3
Concentration ........................................................................................... 218
10.1.2.
The Absorption Path ......................................................................................................... 219
10.1.3.
The Reference / Measurement Cycle .............................................................................. 220
10.1.4.
Interferent Rejection ......................................................................................................... 221
10.2.
P
NEUMATIC
O
PERATION
.............................................................................................................. 223
10.2.1.
Sample Gas Air Flow ........................................................................................................ 223
10.2.2.
Critical Flow Orifice........................................................................................................... 224
10.2.3.
Particulate Filter................................................................................................................ 225
10.2.4.
Zero Span Gas Supply Options ....................................................................................... 225
10.3.
E
LECTRONIC
O
PERATION
............................................................................................................. 226
10.3.1.
Overview ........................................................................................................................... 226
10.3.2.
CPU................................................................................................................................... 228
10.3.3.
Optical Bench................................................................................................................... 229
10.3.4.
Pneumatic Sensor Board ................................................................................................. 231
10.3.5.
Relay Board ...................................................................................................................... 231
10.3.6.
Mother Board .................................................................................................................... 233
10.3.7.
Power Supply/ Circuit Breaker ......................................................................................... 236
10.4.
I
NTERFACE
.................................................................................................................................. 237
10.5.
S
OFTWARE
O
PERATION
............................................................................................................... 239
10.5.1.
Adaptive Filter ................................................................................................................... 240
10.5.2.
Calibration - Slope and Offset .......................................................................................... 241
10.5.3.
Internal Data Acquisition System (iDAS) ......................................................................... 242
11. TROUBLESHOOTING & REPAIR PROCEDURES.....................................243