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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
9.3.8 NO
x
Sensor Module
Table 9-9-20 and Table 9-9-21 show the assembly of the NO
x
sensor module.
9.3.8.1 PMT
The PMT detects the light emitted by the reaction of NO with ozone. It has a gain of about
500,000 to 1,000,000. It is not possible to test the detector outside of the instrument in the field.
The best way to determine if the PMT is working is by using Optic Test. OT operation is
described in Section 9.1.3.3.
The basic method to diagnose a PMT fault is to eliminate the other com
ponents using ET, OT
and specific tests for other sub-assemblies.
9.3.8.2 Reaction Cell Temp
The reaction cell temperature is controlled by the CPU. It operates by reading a thermistor
amplifier on the 01086 Status/Temp board. The CPU controls the temperature by toggling a bit
on the V/F board. The V/F board TTL logic controls a solid state switch on the Switch Board in
the PSM. The switched 115VAC comes out of the PSM to a connector near the underside of the
reaction cell. A warning message may be present during initial warm-up or if the connector is
not plugged in after cleaning the reaction cell.
9.3.8.3 Preamp Board
The NO
x
Preamp Board is a multifunction board providing circuitry to support the following
functions.
1.
Preamp, buffer amplifier, physical range control hardware for the PMT detector.
2.
Precision voltage reference and voltage generation, and control for the PMT - HVPS
inside the sensor module.
3.
Constant current generator and adjustment for the Optic Test LED.
4.
Voltage generation and adjustment for Electric Test.
5.
Thermistor amplifier, control signal generation for the PMT cooler.
The setup and adjustment of items 1-4 above is covered in the Factory Calibration procedure in
Section 9.1.6. Item 5 has no adjustable features.
9-62
PRINTED DOCUMENTS ARE UNCONTROLLED
- TELEDYNE 1
- HIGHLIGHTS 2
- MODEL 200A 4
- NITROGEN OXIDE ANALYZER 4
- SAFETY MESSAGES 6
- TABLE OF CONTENTS 8
- LIST OF FIGURES 12
- LIST OF TABLES 13
- 1 HOW TO USE THIS MANUAL 16
- 2 GETTING STARTED 18
- 2.3 Initial Operation 23
- WARRANTY 32
- 3.3 Warranty 34
- TERMS AND CONDITIONS 35
- 4 THE M200A NO 36
- ANALYZER 36
- 4.2 Operation Summary 38
- 4.2.4 V/F Board 39
- 4.2.5 Front Panel 39
- 4.2.6 Power Supply Module 41
- 4.2.8 Ozone Generator 44
- 4.2.9 Molydbenum Converter 44
- 5 SOFTWARE FEATURES 46
- 5.1.1 Sample Menu 49
- 5.1.2 Set-Up Menu 50
- 5.2 Sample Mode 53
- 5.3 Set-Up Mode 59
- 5.3.4 Range Menu 61
- 5.3.5 Password Enable 65
- 5.3.6 Time of Day Clock 65
- 5.3.7 Diagnostic Mode 65
- 5.3.8 Communications Menu 65
- 5.3.9 Variables Menu (VARS) 66
- 5.4 Status Output 67
- 5.5 RS-232 Interface 68
- 5.5.2 Command Summary 73
- 5.5.8 Internal Variables 84
- 6.1 Rack Mount Options 86
- 6.2 Zero/Span Valves 86
- Mode No. Mode Name Action 88
- 6.5 Permeation Tube 90
- Zero/Span Valves Option 99
- NO and NO 101
- 7.6 Calibrate on NO 102
- Permeation Tube 102
- Closure 104
- 7.8.3 Data Recording Device 108
- 223 ONOONO 109
- = analyzer flow demand (cm 110
- /min (110/100) = 550 cm 111
- = 500 cm 111
- 7.8.7 Calibration Frequency 120
- 7.8.10 ZERO and SPAN Checks 123
- 7.10 Calibration Quality 128
- 7.11 References 130
- 8 MAINTENANCE 132
- Teledyne API Model 200A NO 142
- 8.9 Leak Check Procedure 146
- (table continued) 151
- 9.2 Performance Problems 173
- 9.2.1 AC Power Check 174
- 9.2.2 Flow Check 174
- 9.2.4 Negative Output 176
- 9.2.5 Excessive Noise 176
- 9.2.6 Unstable Span 177
- 9.2.7 Unstable Zero 178
- 9.2.8 Inability to Span 178
- 9.2.9 Inability to Zero 179
- 9.2.10 Non-Linear Response 180
- 9.2.11 Slow Response 181
- 9.3.2 RS-232 Communications 185
- *Required settings 191
- 9.3.4 Status/Temp Board 194
- 9.3.5 Power Supply Module 196
- C. The 200
- 9.3.6 Ozone Generator 201
- 9.3.7 Flow/Pressure Sensor 204
- 9.3.8 NO 209
- Sensor Module 209
- 9.3.10 Pneumatic System 214
- 10 M200A SPARE PARTS LIST 216
- Part No. Description 217
- Includes: Qty 220
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