Teledyne 200AH User Manual

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PRINT DATE: 03 March 2009

INSTRUCTION MANUAL

MODEL 200AH

NITROGEN OXIDES ANALYZER

ADVANCED POLLUTION INSTRUMENTATION DIVISION

©TELEDYNE INSTRUMENTS

(T-API)

9480 CARROLL PARK DRIVE

SAN DIEGO, CA 92121-5201

TOLL-FREE: 800-324-5190

FAX: 858-657-9816

TEL: 858-657-9800

E-MAIL: api-sales@teledyne.com

WEB SITE: www.teledyne-api.com

01620 REV. G2

DCN 5333

03 March 2009

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

SAFETY MESSAGES

Your safety and the safety of others is very important. We have provided many important safety messages in this manual. Please read these messages carefully.

A safety message alerts you to potential hazards that could hurt you or others. Each safety message is associated with a safety alert symbol. These symbols are found in the manual and inside the instrument. The definition of these symbols is described below:

GENERAL WARNING/CAUTION: Refer to the instructions for details on the specific danger.

CAUTION: Hot Surface Warning

CAUTION: Electrical Shock Hazard

Technician Symbol: All operations marked with this symbol are to be performed by qualified maintenance personnel only.

Electrical Ground: This symbol inside the instrument marks the central safety grounding point for the instrument.

CAUTION

The analyzer should only be used for the purpose

and in the manner described in this manual.

If you use the analyzer in a manner other than that for which

it was intended, unpredictable behavior could ensue with

possible hazardous consequences.

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table of Contents

SAFETY MESSAGES ........................................................................................... I

LIST OF TABLES.............................................................................................. VIII

1. HOW TO USE THIS MANUAL...................................................................... 1-1

2. GETTING STARTED..................................................................................... 2-1

2.1. UNPACKING....................................................................................................................2-1

ELECTRICAL AND PNEUMATIC CONNECTIONS .................................................................... 2-1

2.2.

2.3.

INITIAL OPERATION ......................................................................................................... 2-7

3. SPECIFICATIONS, WARRANTY.................................................................. 3-1

3.1. SPECIFICATIONS ............................................................................................................. 3-1

3.2. WARRANTY ....................................................................................................................3-2

4. THE M200AH NOX ANALYZER ................................................................... 4-1

4.1. PRINCIPLE OF OPERATION............................................................................................... 4-1

4.1.1. NOX Measurement................................................................................................. 4-1

4.1.2. Oxygen Measurement (Option) .............................................................................4-2

4.2. OPERATION SUMMARY ....................................................................................................4-5

4.2.1. NOX Sensor Module, Reaction Cell, Detector........................................................ 4-5

4.2.2. Oxygen Sensor Module (Option)........................................................................... 4-5

4.2.3. Pneumatic Sensor Board....................................................................................... 4-6

4.2.4. Computer Hardware and Software........................................................................ 4-6

4.2.5. V/F Board..............................................................................................................4-7

4.2.6. Front Panel............................................................................................................ 4-7

4.2.7. Power Supply Module............................................................................................ 4-8

4.2.8. Pump, Valves, Pneumatic System......................................................................... 4-8

4.2.9. Ozone Generator................................................................................................. 4-11

4.2.10. NO

- NO Converter .......................................................................................... 4-11

5. SOFTWARE FEATURES.............................................................................. 5-1

5.1. INDEX TO FRONT PANEL MENUS....................................................................................... 5-1

5.1.1. Sample Menu ........................................................................................................5-6

5.1.2. Set-Up Menu .........................................................................................................5-7

5.2.

SAMPLE MODE .............................................................................................................5-11

5.2.1. Test Functions..................................................................................................... 5-11

5.2.2. CAL, CALS, CALZ, Calibration Functions............................................................ 5-15

5.3. SET-UP MODE.............................................................................................................. 5-17

5.3.1. Configuration Information (CFG) .........................................................................5-17

5.3.2. Automatic Calibration (AutoCal) .......................................................................... 5-17

5.3.3. Data Acquisition System (DAS)........................................................................... 5-18

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.3.4. Range Menu........................................................................................................ 5-20

5.3.5. Password Enable................................................................................................. 5-23

5.3.6. Time of Day Clock............................................................................................... 5-23

5.3.7. Diagnostic Mode.................................................................................................. 5-23

5.3.8. Communications Menu........................................................................................ 5-24

5.3.9. Variables Menu (VARS) ...................................................................................... 5-24

5.4. M200AH OPERATING MODES........................................................................................ 5-25

5.4.1. NO/NOx/NO2 Switching Mode.............................................................................. 5-25

5.4.2. NOX Only Mode................................................................................................... 5-26

5.4.3. NO Only Mode..................................................................................................... 5-26

5.5. 4-20 MA CURRENT LOOP ..............................................................................................5-27

5.6. STATUS OUTPUT........................................................................................................... 5-27

RS-232 INTERFACE...................................................................................................... 5-28

5.7.

5.7.1. Setting up the RS-232 Interface ..........................................................................5-28

5.7.2. Command Summary............................................................................................ 5-31

5.7.3. TEST Commands and Messages........................................................................5-35

5.7.4. WARNING Commands and Messages................................................................ 5-36

5.7.5. CALIBRATION Commands and Messages......................................................... 5-37

5.7.6. DIAGNOSTIC Commands and Messages........................................................... 5-38

5.7.7. DAS Commands and Messages.......................................................................... 5-39

5.7.8. VARIABLES Commands and Messages............................................................. 5-41

6. OPTIONAL HARDWARE AND SOFTWARE................................................ 6-1

6.1. RACK MOUNT OPTIONS................................................................................................... 6-1

6.2. ZERO/SPAN VALVES OPTION ...........................................................................................6-2

6.2.1. Autocal - Setup Zero/Span Valves......................................................................... 6-3

6.3. OXYGEN SENSOR OPTION ............................................................................................... 6-4

6.4. ISOLATED 4-20 MA CURRENT LOOP OPTION .....................................................................6-5

6.5. MOLYBDENUM CONVERTER OPTION ................................................................................. 6-5

6.6. EXTERNAL DESICCANT CANISTER OPTION ........................................................................ 6-5

ALTERNATE BYPASS FLOW ORIFICE OPTION..................................................................... 6-5

6.7.

6.8.

M501 EXTERNAL CONVERTER OPTION............................................................................. 6-5

7. CALIBRATION AND ZERO/SPAN CHECKS ............................................... 7-1

7.1. MANUAL NO

7.2.

MANUAL O2 ZERO/SPAN CHECK OR CAL WITH ZERO/SPAN GAS IN THE SAMPLE PORT ........ 7-6

7.3. MANUAL ZERO/SPAN CHECK WITH ZERO/SPAN VALVES OPTION......................................... 7-7

7.4. DYNAMIC ZERO/SPAN CALIBRATION USING AUTOCAL........................................................ 7-9

USE OF ZERO/SPAN VALVES WITH REMOTE CONTACT CLOSURE ......................................7-10

7.5.

7.6. NO ONLY MODE CALIBRATION....................................................................................... 7-11

7.7.

NOX ONLY MODE CALIBRATION ..................................................................................... 7-11

7.8. CALIBRATION REQUIREMENTS FOR AUTORANGE OR REMOTE RANGE................................ 7-11

CALIBRATION REQUIREMENTS FOR INDEPENDENT RANGE ................................................ 7-12

7.9.

7.10.

CALIBRATION QUALITY ................................................................................................7-12

CONVERTER EFFICIENCY COMPENSATION..................................................................... 7-13

7.11.

7.12.

RECOMMENDATIONS FOR CEM APPLICATIONS.............................................................. 7-14

ZERO/SPAN CHECK OR CAL WITH ZERO/SPAN GAS IN THE SAMPLE PORT...... 7-3

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

7.12.1. Calibration Gasses............................................................................................7-14

7.12.2. Calibration Frequency ....................................................................................... 7-15

7.12.3. Converter Efficiency .......................................................................................... 7-15

8. MAINTENANCE ............................................................................................ 8-1

8.1. MAINTENANCE SCHEDULE ............................................................................................... 8-1

8.2. REPLACING THE SAMPLE PARTICULATE FILTER ................................................................. 8-2

8.3. REPLACING THE CONVERTER........................................................................................... 8-4

8.4. CLEANING THE REACTION CELL ....................................................................................... 8-6

8.5. PNEUMATIC LINE INSPECTION ..........................................................................................8-9

8.6. LEAK CHECK PROCEDURE............................................................................................. 8-13

8.7. LIGHT LEAK CHECK PROCEDURE.................................................................................... 8-13

8.8. PROM REPLACEMENT PROCEDURE ................................................................................ 8-14

9. TROUBLESHOOTING AND ADJUSTMENTS.............................................. 9-1

9.1.

OPERATION VERIFICATION - DIAGNOSTIC TECHNIQUES ......................................................9-2

9.1.1. Fault Diagnosis with TEST Variables .................................................................... 9-2

9.1.2. Fault Diagnosis with WARNING Messages........................................................... 9-8

9.1.3. Fault Diagnosis using DIAGNOSTIC Mode......................................................... 9-10

9.1.4. M200AH Internal Variables.................................................................................. 9-17

9.1.5. Test Channel Analog Output ...............................................................................9-19

9.1.6. Factory Calibration Procedure............................................................................. 9-20

9.2. PERFORMANCE PROBLEMS............................................................................................ 9-24

9.2.1. AC Power Check................................................................................................. 9-24

9.2.2. Flow Check..........................................................................................................9-25

9.2.3. No Response to Sample Gas.............................................................................. 9-25

9.2.4. Negative Output................................................................................................... 9-26

9.2.5. Excessive Noise.................................................................................................. 9-26

9.2.6. Unstable Span..................................................................................................... 9-27

9.2.7. Unstable Zero...................................................................................................... 9-28

9.2.8. Inability to Span................................................................................................... 9-28

9.2.9. Inability to Zero.................................................................................................... 9-28

9.2.10. Non-Linear Response........................................................................................ 9-29

9.2.11. Slow Response.................................................................................................. 9-30

9.2.12. Analog Output Doesn't Agree With Display Concentration................................ 9-30

9.3. SUBSYSTEM TROUBLESHOOTING AND ADJUSTMENTS....................................................... 9-31

9.3.1. Computer, Display, Keyboard.............................................................................. 9-31

9.3.2. RS-232 Communications..................................................................................... 9-34

9.3.3. Voltage/Frequency (V/F) Board........................................................................... 9-37

9.3.4. Status/Temp Board.............................................................................................. 9-43

9.3.5. Power Supply Module.......................................................................................... 9-45

9.3.6. Ozone Generator................................................................................................. 9-49

9.3.7. Flow/Pressure Sensor.........................................................................................9-53

9.3.8. NOX Sensor Module ............................................................................................ 9-58

9.3.9. Z/S Valves........................................................................................................... 9-63

9.3.10. Pneumatic System............................................................................................. 9-64

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

APPENDIX A ELECTRICAL SCHEMATICS ....................................................A-1

APPENDIX B SPARE PARTS AND EXPENDABLES......................................B-1

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

LIST OF FIGURES

FIGURE 2-1: REMOVAL OF SHIPPING SCREWS & CHECK FOR CORRECT POWER............................ 2-3

FIGURE 2-2: REAR PANEL......................................................................................................... 2-4

FIGURE 2-3: REAR PANEL WITH O

FIGURE 2-4: INLET AND EXHAUST VENTING RECOMMENDATIONS.................................................. 2-6

FIGURE 2-5: FRONT PANEL ..................................................................................................... 2-12

FIGURE 2-6: ASSEMBLY LAYOUT.............................................................................................. 2-13

FIGURE 2-7: ASSEMBLY LAYOUT – O

FIGURE 4-1: PARAMAGNETIC SENSOR........................................................................................ 4-3

FIGURE 4-2: BLOCK DIAGRAM ...................................................................................................4-4

FIGURE 4-3: EXTERNAL PUMP PACK........................................................................................ 4-10

FIGURE 5-1: SAMPLE MENU TREE ............................................................................................. 5-2

FIGURE 5-2: SETUP MENU TREE ............................................................................................... 5-3

FIGURE 5-3: SETUP MENU TREE- UNITS WITH O FIGURE 5-4: SETUP MENU TREE – UNITS WITH O

FIGURE 8-1: REPLACING THE PARTICULATE FILTER..................................................................... 8-3

FIGURE 8-2: CONVERTER ASSEMBLY ......................................................................................... 8-5

FIGURE 8-3: REACTION CELL ASSEMBLY.................................................................................... 8-7

FIGURE 8-4: SAMPLE/BYPASS FLOW CONTROL ASSEMBLY .......................................................... 8-8

FIGURE 8-5: PNEUMATIC DIAGRAM ..........................................................................................8-10

FIGURE 8-6: PNEUMATIC DIAGRAM WITH ZERO/SPAN VALVES.................................................... 8-11

FIGURE 8-7: PNEUMATIC DIAGRAM WITH OXYGEN SENSOR........................................................ 8-12

FIGURE 9-1: SPAN CALIBRATION VOLTAGE............................................................................... 9-23

FIGURE 9-2: CPU BOARD JUMPER SETTINGS........................................................................... 9-33

FIGURE 9-3: RS-232 PIN ASSIGNMENTS.................................................................................. 9-35

FIGURE 9-4: V/F BOARD JUMPER SETTINGS............................................................................. 9-42

FIGURE 9-5: POWER SUPPLY MODULE LAYOUT ........................................................................9-47

FIGURE 9-6: ELECTRICAL BLOCK DIAGRAM............................................................................... 9-48

FIGURE 9-7: OZONE GENERATOR SUBSYSTEM ......................................................................... 9-52

IGURE 9-8: FLOW/PRESSURE SENSOR................................................................................... 9-55

F FIGURE 9-9: NO FIGURE 9-10: NO F

IGURE 9-11: PMT COOLER SUBSYSTEM ................................................................................ 9-60

IGURE 9-12: HIGH VOLTAGE POWER SUPPLY .........................................................................9-62

SENSOR MODULE ........................................................................................9-56

SENSOR MODULE ......................................................................................9-57

OPTION................................................................................ 2-5

SENSOR OPTION............................................................. 2-14

SENSOR .......................................................... 5-4

SENSOR......................................................... 5-5

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

LIST OF TABLES

TABLE 2-1: FINAL TEST AND CALIBRATION VALUES ................................................................... 2-15

TABLE 4-1: SAMPLING MODES OF THE M200AH......................................................................... 4-1

TABLE 4-2: FRONT PANEL STATUS LED'S .................................................................................. 4-8

ABLE 4-3: OZONE GENERATOR START-UP TIMING................................................................... 4-11

T T

ABLE 5-1: M200AH SAMPLE MENU STRUCTURE....................................................................... 5-6

TABLE 5-2: M200AH SETUP MENU ...........................................................................................5-7

TABLE 5-3: M200AH SETUP MENU ...........................................................................................5-9

TABLE 5-4: M200AH SETUP MENU .........................................................................................5-10

TABLE 5-5: DAS DATA CHANNEL EDITING................................................................................ 5-19

TABLE 5-6: CALIBRATE, SETUP PASSWORDS ............................................................................ 5-23

TABLE 5-7: M200AH OPERATING MODES................................................................................ 5-25

TABLE 5-8: STATUS OUTPUT PIN ASSIGNMENTS ....................................................................... 5-27

TABLE 5-9: RS-232 PORT SETUP - FRONT PANEL ....................................................................5-29

TABLE 5-10: RS-232 SWITCHING FROM TERMINAL MODE TO COMPUTER MODE......................... 5-30

TABLE 5-11: RS-232 TERMINAL MODE EDITING KEYS............................................................... 5-31

TABLE 5-12: RS-232 COMMAND SUMMARY.............................................................................. 5-32

TABLE 5-13: RS-232 COMMAND SUMMARY.............................................................................. 5-33

TABLE 5-14: RS-232 INTERFACE COMMAND TYPES.................................................................. 5-34

TABLE 5-15: RS-232 TEST MESSAGES.................................................................................... 5-35

TABLE 5-16: RS-232 WARNING MESSAGES ............................................................................. 5-36

TABLE 5-17: RS-232 CALIBRATION MESSAGES ........................................................................ 5-37

TABLE 5-18: RS-232 CALIBRATION COMMANDS ....................................................................... 5-38

TABLE 5-19: RS-232 DIAGNOSTIC COMMAND SUMMARY........................................................... 5-39

TABLE 6-1: ZERO/SPAN VALVE OPERATION................................................................................ 6-2

TABLE 6-2: SETUP AUTOMATIC ZERO/SPAN CHECKING OR CALIBRATION ...................................... 6-3

TABLE 6-3: ACTION OF MODE FIELD IN AUTOCAL ...................................................................... 6-4

TABLE 7-1: TYPES OF ZERO/SPAN CHECK AND CALIBRATION....................................................... 7-2

TABLE 7-2: MANUAL ZERO CALIBRATION PROCEDURE - ZERO GAS THRU SAMPLE PORT ............... 7-3

ABLE 7-3: ENTER EXPECTED SPAN GAS CONCENTRATIONS PROCEDURE.................................... 7-4

TABLE 7-4: MANUAL SPAN CALIBRATION PROCEDURE - SPAN GAS THRU SAMPLE PORT................7-5

TABLE 7-5: MANUAL O T

ABLE 7-6: MANUAL O2 SPAN CALIBRATION PROCEDURE - SPAN GAS THRU SAMPLE PORT........... 7-7

ABLE 7-7: MANUAL ZERO CHECK PROCEDURE - Z/S VALVES..................................................... 7-8

TABLE 7-8: MANUAL SPAN CHECK PROCEDURE - Z/S VALVES ..................................................... 7-9

TABLE 7-9: Z/S VALVE MODES WITH REMOTE CONTACT CLOSURE............................................. 7-10

TABLE 7-10: CALIBRATION REQUIREMENTS FOR AUTORANGE OR REMOTE RANGE...................... 7-12

ABLE 7-11: CALIBRATION QUALITY CHECK.............................................................................. 7-13

TABLE 7-12: CONVERTER EFFICIENCY - AUTOMATIC CALCULATION ............................................ 7-14

ABLE 8-1: PREVENTATIVE MAINTENANCE SCHEDULE ................................................................. 8-1

TABLE 9-1: TEST FUNCTIONS .................................................................................................... 9-3

TABLE 9-2: FRONT PANEL WARNING MESSAGES......................................................................... 9-9

TABLE 9-3: SUMMARY OF DIAGNOSTIC MODES ......................................................................... 9-11

ZERO CALIBRATION PROCEDURE - ZERO GAS THRU SAMPLE PORT........... 7-6

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

TABLE 9-4: DIAGNOSTIC MODE - SIGNAL I/O ............................................................................ 9-12

TABLE 9-5: MODEL 200AH VARIABLES .................................................................................... 9-18

TABLE 9-6: TEST CHANNEL READINGS..................................................................................... 9-19

ABLE 9-7: MOTHERBOARD JUMPER SETTINGS......................................................................... 9-39

T T

ABLE 9-8: V/F BOARD SWITCH SETTINGS............................................................................... 9-39

TABLE 9-9: POWER SUPPLY MODULE SUBASSEMBLIES.............................................................. 9-46

TABLE 9-10: POWER SUPPLY MODULE LED OPERATION........................................................... 9-49

TABLE 9-11: OZONE GENERATOR CONTROL CONDITIONS.......................................................... 9-50

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

1. HOW TO USE THIS MANUAL

The Model 200AH has been designed to produce accurate data, be serviceable, reliable and easy to use. The M200AH's microprocessor continually checks operating parameters such as temperature, flow, and critical voltages. The instruments design uses top mounted, modular components with captive screws to facilitate repair and ease of access. If you encounter any difficulty refer to the Troubleshooting Section 9 - General Hints.

We recognize that the need for information from this manual changes as time passes. When the instrument first arrives, it is necessary to get it up and running quickly and verify its correct operation. As time passes, more detailed information is often required on special configurations, calibration alternatives and other operational details. Finally there is the need for periodic maintenance and to quickly troubleshoot problems to assure maximum reliability and data integrity.

To address these needs, we have created three indexes to the information inside. They are: Table of Contents: Outlines the contents of the manual in the order the information is presented. This is a good

overview of the topics covered in the manual. There is also a list of Tables and a list of Figures. Index to M200AH Front Panel Menus: The Menu Index briefly describes the front panel menus and refers you to other sections of the

manual that have a detailed explanation of each menu selection. Troubleshooting Section 9: The Troubleshooting Section allows you to diagnose and repair the instrument based on

variables in the TEST menu, the results of DIAGNOSTIC tests, and performance faults such as excessive noise or drift. The troubleshooting section also explains the operation, adjustment, diagnosis and testing of each instrument subsystem.

If you are unpacking the instrument for the first time, please refer to Getting Started in Section 2.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

2. GETTING STARTED

2.1. Unpacking

CAUTION

Your safety and the safety of others is very important. We

have provided many important safety messages in this manual.

Please read these messages carefully.

To avoid personal injury, always use two persons to

lift and carry the Model 200AH.

1. Before operation it is necessary to remove the shipping hold-down screws. Remove the

instrument cover, then remove 2 screws as shown in Figure 2-1.

2. Also check for internal shipping damage, and generally inspect the interior of the instrument

to make sure all circuit boards and other components are in good shape.

3. Please check the voltage and frequency label on the serial number tag on the rear panel.

Compare that to your local power before plugging in the Instrument.

2.2. Electrical and Pneumatic Connections

1. Refer to Figure 2-2 to locate the rear panel electrical and pneumatic connections.

2. Attach the pump to the “Exhaust Out” port on the instrument rear panel. The exhaust from

the pump should also be vented to atmospheric pressure.

3. Attach the sample inlet line to the sample inlet port. For initial testing, sample gas can be

calibration gas or stack gas. The pressure of the sample gas at the inlet port should be at ambient pressure and constant. See Figure 2-4.

4. If desired, attach the analog output connections to a strip chart recorder and/or datalogger.

Refer to Figure 9-4 - Analog Output Voltage Ranges - for switch settings. Factory default setting is 0-5 VDC.

5. Connect the power cord to the correct voltage line, then turn to Section 2.3 Initial Operation.

2-1

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

WARNING

Analyzer Exhaust – O3 Scrubber – Pump Pack

Danger – Analyzer exhaust contains ozone.

Do not defeat the internal zone scrubber. This device must always

be present between the analyzer reaction cell and pump.

Vent pump exhaust to well ventilated area at atmospheric pressure.

FIRE or EXPLOSION HAZARD

If the optional charcoal NO2 scrubber is used on the exhaust,

charcoal treated with halogen compounds must not be used.

Use only Teledyne API P/N 00596 charcoal.

Wait at least 5 minutes after turning off pump before

removing NO2 scrubber.

WARNING

Lethal voltages present inside case.

Do not operate with cover off during normal operation.

Before operation check for correct

input voltage and frequency.

Do not operate without proper chassis grounding.

Do not defeat the ground wire on power plug. Turn off analyzer power before disconnecting

electrical subassemblies.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-1: Removal of Shipping Screws & Check for Correct Power

2-3

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-2: Rear Panel

2-4

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-3: Rear Panel with O2 Option

2-5

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-4: Inlet and Exhaust Venting Recommendations

2-6

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

2.3. Initial Operation

1. Turn on the instrument power.

2. The display should immediately light, showing the computer’s memory configuration, then

the instrument type - M200AH. If you are unfamiliar with the M200AH, we recommend that you read the overview Section 4 before proceeding. A diagram of the software menu trees is in Figure 5-1 and Figure 5-2.

3. The M200AH requires about 30 minutes for all internal components to come to temperature.

During this time the ozone generator power is OFF until the membrane dryer has time to purge itself, therefore there will be no response from the instrument, even if span gas is coming in the sample port. Many warning conditions are not displayed during this time, even though temperatures and other conditions are out of specification. All warning messages are enabled after 30 minutes of operation.

4. While waiting for instrument temperatures to stabilize, you can check for correct operation

by using some of the M200AH's diagnostic and test features.

5. Examine the TEST functions by comparing the values listed in Table 2-1 to those in the

display. Remember that as the instrument warms up the values may not have reached their final values yet. If you would like to know more about the meaning and utility of each TEST function refer to Table 9-1. Also, now is a good time to verify that the instrument was shipped with the options you ordered. Table 2-1 also contains the list of options. Section 6 covers setting up the options.

6. Electric Test and Optic Test both generate simulated signals in the M200AH. A. Electric Test checks the electronics of the PMT signal path. To operate Electric Test from

the front panel:

1) Scroll the TEST function to PMT.

2) Press SETUP-MORE-DIAG, then press ENTR to accept the default password. Scroll

to Electric Test and press ENTR to turn it on. Instrument responses should come to the values indicated in Table 2-1. To turn off this test press EXIT. For more information on the circuitry being tested refer to the Troubleshooting Section 9.1.3.2.

B. Optic Test is an "end to end" test of the analyzer HVPS-PMT-detector-electronics-

computer. It simulates a signal by turning on a LED in the Sensor Module. To operate Optic Test from the front panel:

1) Scroll the TEST function to PMT.

2) Press SETUP-MORE-DIAG, then press ENTR to accept the default password. Scroll

to Optic Test and press ENTR to turn on optic test. Instrument response should come up to the values indicated in Table 2-1. To turn off this test press EXIT. To return to the SAMPLE mode press EXIT until SAMPLE is displayed in the upper left display. For more information about OT operation see Section 9.1.3.3.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

7. When the instrument is warmed up, re-check the TEST functions against Table 2-1. All of

the readings should compare closely with those in the table. If they do not see Section 9.1.1. The next task is to calibrate the analyzer. There are several ways to do a calibration, they are summarized in Table 7-1. For a preliminary checkout we recommend calibration with span gas coming in through the sample port. The procedure is:

Step 1 - Set the range, then enter the expected NOx, NO and O2 span gas concentrations:

Step

For Units w/o

O2 Option

1. Press

CAL-CONC-NOX

For Units with

O2 Option

Press CAL-NOX-ENTR CONC-NOX

2. Press ENTR Press ENTR

3. Press

CAL-CONC-NO

Press CAL-NOX-ENTR CONC-NO

4. Press ENTR Press ENTR

5. Press

CAL-O2-CONC

Comment

This key sequence causes the M200AH to prompt for the expected span concentration. Enter the span value by pressing the key under each digit until the expected value is set.

ENTR stores the expected NOx span value. The internal formulas are adjusted to compute this number when span gas concentration is input into the instrument.

In the same CAL-CONC sub menu press the NO button and enter the expected NO span value. As before this value will be used in the internal formulas to compute the NO concentration value.

ENTR stores the expected NO span value. The internal formulas are adjusted to compute this number when span gas concentration is input into the instrument.

Enter the expected O2 span value by pressing the key under each digit until the expected value is set.

6. Press ENTR

7. Press EXIT Press EXIT

8. Press

SETUP-RNGEMODE-SNGL

9. Press

SETUP-RNGE-SET

Press SETUP-RNGEMODE-SNGL

Press SETUP-RNGE-SET

2-8

ENTR stores the expected O2 span value. The internal formulas are adjusted to compute this number when span gas concentration is input into the instrument.

Returns instrument to SAMPLE mode. If necessary, you may want to change ranges.

Normally the instrument is shipped in single range mode set at 100 ppm for NO

. We recommend doing the initial

for O

checkout with these ranges. After SETUP-RNGE-SET, enter 100 and press

ENTR. The instrument will now be in the 100 ppm range for NO display the O ENTR.

range. Enter 25.0 and press

and (if installed) will

and 25%

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Step 2 - Calibrate the instrument for NOX:

Zero/Span Calibration Procedure

Step

For Units w/o

Option

For Units with

Option

Comment

1. Input NOX Zero gas Input NOX Zero gas Allow Zero gas to enter the sample port on

the rear of the instrument.

2. Press CAL Press CAL-NOX The M200AH enters the calibrate mode from

sample mode.

3. Wait 10 min Wait 10 min Wait for reading to stabilize at the zero value.

If you wait less than 10 minutes the final zero value may drift.

4. Press ZERO Press ZERO The ZERO button will be displayed.

5. Press ENTR Press ENTR Pressing ENTR actually changes the

equations and zeros the instrument.

6. Press EXIT and

input NO

Span gas

Press EXIT and input NOX Span gas

M200AH returns to the CAL menu. Now switch gas streams to span gas.

7. Wait 10 min Wait 10 min Wait for reading to stabilize at the span

value.

8. Press SPAN Press SPAN The SPAN button should be displayed. If

there is no SPAN button check the Troubleshooting Section 9.2.8 for instructions on how to proceed. In certain circumstances at low span gas concentrations both the ZERO and SPAN buttons will appear.

9. Press ENTR Press ENTR Pressing ENTR actually changes the

equations so that the concentration displayed is the same as the expected span concentration you entered above, thus spanning the instrument.

10. Press EXIT Press EXIT Pressing EXIT returns the instrument to SAMPLE mode.

11.

Input

Zero gas

Allow Zero gas to enter the sample port on the rear of the instrument.

12. Press CAL-O2 The M200AH enters the calibrate mode from sample mode.

(table continued)

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Zero/Span Calibration Procedure (Continued)

Step

For Units w/o

Option

For Units with

Option

Comment

13. Wait 10 min Wait for reading to stabilize at the zero value. If you wait less than 10 minutes the final zero value may drift.

14. Press ZERO The ZERO button will be displayed.

15. Press ENTR Pressing ENTR actually changes the equations and zeros the

channel of the

instrument.

16. Press EXIT and

input

Span gas

M200AH returns to the CAL menu. Now switch gas streams to span gas.

17. Wait 10 min Wait for reading to stabilize at the span value.

18. Press SPAN The SPAN button should be display ed. If there is no SPAN button check the Troubleshooting Section 9.2.8 for instructions on how to proceed. In certain circumstances at low span gas concentrations both the ZERO and SPAN buttons will appear.

19. Press ENTR Pressing ENTR actually changes the equations so that the concentration displayed is the same as the expected span concentration you entered above, thus spanning the instrument.

20. Press EXIT Pressing EXIT returns the instrument to SAMPLE mode.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Step 3 - Review Quality of calibration:

Calibration Quality Check Procedure

Step

For Units w/o

Option

1. Scroll the TEST function menu until the NO

SLOPE is

displayed.

2. Scroll the TEST function menu until the NO SLOPE is displayed.

For Units with

Option

Scroll the TEST function menu until the NO

SLOPE is

displayed.

Scroll the TEST function menu until the NO SLOPE is displayed.

3. Scroll the TEST

function menu until

SLOPE is

the

displayed.

4. Scroll the TEST function menu until the NO

OFFS is

displayed.

Scroll the TEST function menu until the NO

OFFS is

displayed.

Comment

The SLOPE value for NO

should be 1.0 

0.3. If the value is not in this range, check Section 7.1 or 9. If the SLOPE value is in the acceptable range the instrument will perform optimally.

The SLOPE value for NO should be 1.0 

0.3. If the value is not in this range, check Section 7.1 or 9. If the SLOPE is in the acceptable range the instrument will perform optimally.

NOTE: The NO and NO

slopes should be

equal within  0.3.

The SLOPE value for

should be 1.0  0.3.

If the value is not in this range, check Section

7.1 or 9. If the SLOPE value is in the acceptable range the instrument will perform optimally.

The M200AH will display the OFFSET parameter for the NO

equation. This number

should be near zero. A value of 0.0 50 indicates calibration in the optimal range. If the OFFSET value is outside this range, check Section 7.1 or 9.1 for procedures to correct the OFFSET value to near zero.

5. Scroll the TEST function menu until the NO OFFS is displayed.

6. Scroll the TEST

Scroll the TEST function menu until the NO OFFS is displayed.

function menu until

OFFS is

the

The Instrument will now display the NO OFFSET value. It should also have a value near zero (0.0 50).

The Instrument will now display the OFFSET value. It should also have a value near zero (0.0 50).

displayed.

Step 4 - The M200AH is now ready to measure sample gas.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-5: Front Panel

2-12

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-6: Assembly Layout

2-13

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 2-7: Assembly Layout – O2 Sensor Option

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 2-1: Final Test and Calibration Values

(1)

Observed Value

Units Nominal Range Reference Section

300  50 (Default) 550  50 (Optional)

250  15

2500  200

C 50  2 C 50  2

C 50  2

9.3.7, Table 9-1

9.3.6

9.3.5

9.3.8.2

9.3.4.1

TEST Values

RANGE ppm 5-5000 5.3.4 O2 RANGE % 5-100 5.3.4 NOX STB ppm 0.0 - 0.2 9.1.1, 9.2.5, Table 9-1 SAMP FLW cc/min

OZONE FL cc/min PMT mV 0-5000 9.3.8 AZERO mV -10 to +50 4.1 HVPS V 400 - 700 constant 9.3.8.5 DCPS mV RCELL TEMP

O2 CELL TEMP BLOCK TEMP

(2)

BOX TEMP PMT TEMP CONV TEMP

RCEL PRES IN-Hg-A 2 - 10 constant 9.3.7 SAMP PRES IN-Hg-A 25 - 30 constant 9.3.7

PMT Volts mV NO Conc ppm NOx Conc ppm

C C 7  1 C 700  10 (Std)

Electric Test &Optic Test

Electric Test

OPTIC TEST

8-48 9.3.4.1

9.3.8.4

9.3.4.1

315  5 (Moly)

2000  200 250  25 250  25

100  20

12.5  2

9.1.3.2

9.1.3.3

(table continued)

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 2-1: Final Test and Calibration Values (Continued)

Parameter

Observed Value

Units Nominal Range Reference Section

NO Span Conc ppm 0.5 - 5000 Table 7-3 NOx Span Conc ppm 0.5 - 5000 Table 7-3 O2 Span Conc % 5 - 100 Table 7-3 NO Slope NOx Slope O2 Slope NO Offset mV NOx Offset mV O2 Offset %

1.0  0.3

 25  25  1.0

7.1, 7.10

7.1

7.1, 7.10

7.1, 7.2

7.1, 7.2 Conv Efficiency % 0.75 - 1.10 7.11, 5.2.2.7 NOx Noise at Zero ppm 0.0 - 0.2 Table 9-1 NOx Noise At Span ppm 0.1 - 0.5 Table 9-1 O2 Noise at Zero % Table 9-1 O2 Noise At Span % Table 9-1

Measured Flows

Sample Flow cc/min

50 20

Bypass Flow cc/min 250 (Std)

500 (Optional)

Ozone Flow cc/min

250  15

Factory Installed Options Option Installed

Power Voltage/Frequency O2 Sensor Rack Mount, w/ Slides Rack Mount, w/ Ears Only Rack Mount, External Pump w/o Slides Stainless Zero/Span Valves 4-20 mA Current Loop Output, Isolated Bypass flow 500 cc/min Molybdenum Converter Desiccant Canister - O3 generator

PROM # Serial # Date Technician

(1)

Units with O2 Option , Only

(2)

Units w/o O2 Option, Only

9.3.7, Figure 9-8

Figure 8-4

9.3.7, Figure 9-8

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

3. SPECIFICATIONS, WARRANTY

3.1. Specifications

NOX Specifications O2 Option

Operating Modes NO/NOx switching mode, NO only

mode, NO

Ranges

Noise at zero <0.020 ppm RMS 0.05% O2 Noise at span <0.5% of reading RMS above 20 ppm <0.1% O2 Detection Limit (Note 1) 0.040 ppm 0.1% O2 Zero Drift (Note 2) <0.5% full scale/24 hours 0.1% O2 Zero Drift (Note 2) <1.0% full scale/7 days 0.1% O2 Span Drift (Note 2) <1% FS/24 hours 0.1% O2 Lag Time

- Switching Mode - 20 sec (Note 3)

- NOx mode - 4 sec (Note 3)

Response Time

- Switching Mode - 95% in < 40 sec (Note 3)

- NOx mode - 95% in < 10 sec (Note 3) Sample Flow Rate (Analyzer) Sample Flow Rate (Sensors) Linearity 1% of full scale 0.1% O2 Precision 0.5% of reading 0.1% O2 Temperature Range Humidity 0-95% RH non-condensing Temp Coefficient Voltage Coefficient < 0.1% per V < 0.1% per V Dimensions HxWxD 7"x17"x23.6" (18 cm x 43 cm x 61 cm) Weight, Analyzer 45 lbs (22 kg) Weight, Pump Pack 16 lbs (7 kg) Power, Analyzer 100 V~ 50/60 Hz, 120 V~ 60 Hz, 220 V~ 50 Hz, 240 V~ 50 Hz, 200 watts Power, Analyzer4 230 V~ 50 Hz, 2.5A Power, Ext Pump 110 V~ 60 Hz, 220 V~ 50 Hz, 240 V~ 50 Hz, 295 watts Power, Ext Pump4 230 V~ 50 Hz, 2.5A Environmental Installation Category (Over-voltage Category) II Pollution Degree 2 Analog Resolution 1 part in 2048 of selected voltage or

Recorder Output 0-100mV, 0-1, 5, 10v, bipolar 0-100mV, 0-1, 5, 10v, bipolar Current Loop Option 4-20ma isolated 4-20ma isolated Status 12 Status Outputs from opto-isolator Measurement Units ppm, mg/m3 %

1. Defined as twice the zero noise level.

2. At constant temperature and voltage.

3. Lag & response times longer for external converter option.

4. Electrical ratings for CE Mark compliance.

In 1 ppm increments from 5 ppm to 5000 ppm; Single range, independent ranges or autoranging

370 cc/min 10% (Including bypass) 40 cc/min 10% 80 cc/min 10%

5-40C

< 0.1% per C < 0.1% per C

current range

only mode.

Paramagnetic Sensor

In 1 % increments from 5 % to 100%, Independent of NO

< 4sec

95% in <10 sec

1 part in 2048 of selected voltage or current range

range

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

3.2. Warranty

WARRANTY POLICY (02024c)

Prior to shipment, Teledyne API equipment is thoroughly inspected and tested. Should equipment failure occur, Teledyne API assures its customers that prompt service and support will be available.

COVERAGE

After the warranty period and throughout the equipment lifetime, Teledyne API stands ready to provide on-site or in-plant service at reasonable rates similar to those of other manufacturers in the industry. All maintenance and the first level of field troubleshooting is to be performed by the customer.

NON-TELEDYNE API MANUFACTURED EQUIPMENT

Equipment provided but not manufactured by Teledyne API is warranted and will be repaired to the extent and according to the current terms and conditions of the respective equipment manufacturers warranty.

GENERAL

Teledyne API warrants each Product manufactured by Teledyne API to be free from defects in material and workmanship under normal use and service for a period of one year from the date of delivery. All replacement parts and repairs are warranted for 90 days after the purchase.

If a Product fails to conform to its specifications within the warranty period, Teledyne API shall correct such defect by, in Teledyne API's discretion, repairing or replacing such defective Product or refunding the purchase price of such Product.

The warranties set forth in this section shall be of no force or effect with respect to any Product: (i) that has been altered or subjected to misuse, negligence or accident, or (ii) that has been used in any manner other than in accordance with the instruction provided by Teledyne API or (iii) not properly maintained.

THE WARRANTIES SET FORTH IN THIS SECTION AND THE REMEDIES THEREFORE ARE EXCLUSIVE AND IN LIEU OF ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY, WHETHER EXPRESSED OR IMPLIED. THE REMEDIES SET FORTH IN THIS SECTION ARE THE EXCLUSIVE REMEDIES FOR BREACH OF ANY WARRANTY CONTAINED HEREIN. TELEDYNE API SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THIS AGREEMENT OF TELEDYNE API'S PERFORMANCE HEREUNDER, WHETHER FOR BREACH OF WARRANTY OR OTHERWISE.

TERMS AND CONDITIONS

All units or components returned to Teledyne API should be properly packed for handling and returned freight prepaid to the nearest designated Service Center. After the repair, the equipment will be returned, freight prepaid.

3-2

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

4. THE M200AH NOX ANALYZER

4.1. Principle of Operation

4.1.1. NOX Measurement

The Teledyne API Model 200AH Analyzer is designed to measure the concentration of nitric oxide [NO], total oxides of nitrogen [NOx] and, by calculation, nitrogen dioxide [NO2] (Note: the calculation of NO option.) With the proper setup, it can operate in any of three sampling modes.

Table 4-1: Sampling Modes of the M200AH

Mode Description

is not available in instruments equipped with the Oxygen measurement

NO/NOX switching mode

NO only mode

NOx only mode

Converter is switched, measures NO, NOx, and NO2.

Converter is switched out of sample stream. Nitric Oxide is only gas measured.

Converter is switched into the sample stream, NO measured.

is only gas

Regardless of which sampling mode the instrument is operating in, the signal from the M200AH comes from the light emitted from the chemiluminescent gas phase reaction of nitric oxide [NO] and ozone [O3] as follows:

223 O*NOONO 

hvNO*NO 22 

The reaction of NO with ozone results in electronically excited NO2 molecules as shown in the first equation above. The excited NO

molecules release their excess energy by emitting a

photon and dropping to a lower energy level as shown in the second equation. It has been shown that the light intensity produced is directly proportional to the [NO] concentration present.

In the NO mode, the sample gas is routed directly into the reaction cell. Any NO gas present reacts with ozone, producing light as described above.

In the NO

mode, the sample gas is routed through a NO2 to NO converter, and any NO2 present

is reduced to NO. The NO initially present remains as NO, therefore the signal is the sum of NO and NO

In the NO/NO

present in the sample gas stream.

switching mode the Analyzer samples the gas stream and measures [NO]

concentration by digitizing the signal from the Analyzer's photomultiplier tube (PMT). The

4-1

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

concentration is measured and stored internally. The valve is then switched, routing the sample gas through the converter, the signal measured is the NO

concentration which is also stored in

the computer. The [NO

] component is calculated by subtracting [NOX] - [NO] = [NO2] using the built-in

computer. The three results [NO], [NOX], and [NO2] are then further processed and stored by the computer yielding several instantaneous and long term averages for all three components.

Periodically, the AutoZero valve switches allowing the analyzer to read zero background. The AutoZero readings are subtracted from all of the other readings. This improves zero baseline stability.

4.1.2. Oxygen Measurement (Option)

The Oxygen Sensor used in M200AH utilizes the paramagnetic susceptibility of oxygen, a physical property that distinguishes oxygen from most other common gases.

The sensor incorporates two nitrogen-filled glass spheres mounted on a strong rare metal tautband suspension. This assembly is suspended in a symmetrical non-uniform magnetic field. When the surrounding gas contains paramagnetic oxygen, the glass spheres are pushed further away from the strongest part of the magnetic field. The strength of the torque acting on the suspension is proportional to the oxygen content of the surrounding gases.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 4-1: Paramagnetic Sensor

Refer to Figure 4-1. The measuring system is “null-balanced”. First, the ‘zero’ position of the suspension assembly, as measured in nitrogen. is sensed by a split photo-sensor that receives light reflected from a mirror attached to the suspension assembly. The output from the photosensor is fed back to a coil wound around the suspension assembly. This feedback achieves two objectives:

a) First, when oxygen is introduced to the cell, the torque acting upon the suspension

assembly is balanced by a restoring torque due to this feedback current in the coil. The feedback current is directly proportional to the volume magnetic susceptibility of the sample gas and hence, after calibration, to the partial pressure of oxygen in the sample. A voltage output is derived which is proportional to the current.

b) Second. the electromagnetic feedback “stiffens” the suspension, damping it heavily and

increasing its natural frequency, making the suspension resilient to shock.

4-3

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 4-2: Block Diagram

4-4

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

4.2. Operation Summary

4.2.1. NOX Sensor Module, Reaction Cell, Detector

The sensor module is where light from the chemilumenescent reaction is generated and detected. It is the most complicated and critical sub-assembly in the entire analyzer. It consists of the following assemblies and functions:

1. The reaction cell and ozone flow control module

2. Reaction cell heater/thermistor

3. PMT and High Voltage Power Supply

4. PMT cooler/cold block/heatsink/fan

5. Preamp assembly: A. Preamp range control hardware B. HVPS control C. PMT cooler temp control D. Electric test electronics E. Optic test electronics

4.2.2. Oxygen Sensor Module (Option)

The main components of Oxygen Sensor are:

1. The transducer body consists of the paramagnetic cell and the magnet frame.

The interior of the paramagnetic cell is the only sample wetted surface. It is a precision machined component containing the suspension assembly, and is secured within the magnet frame.

2. Optical Assembly and Electronics Control PCB.

The optical assembly consists of a precision machined optical mounting bracket onto which the integrated electronics board and the small photo-sensor board are fitted. The optical assembly is secured to the magnet frame.

The electronics board contains the LED source, temperature compensation thermistors and all other associated signal processing components, including a 16-way DC connector and the multi-turn zero and span potentiometers.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

4.2.3. Pneumatic Sensor Board

The sensor board consists of 2 pressure sensors and a flow sensor. One pressure sensor measures the pressure in the reaction cell. The reaction cell is maintained at about one-quarter of atmospheric pressure. The second pressure sensor measures the pressure upstream of the reaction cell, which is near ambient pressure. From these two pressures the sample flow rate can be computed and is displayed as sample flow in the TEST menu. Finally, a solid state flow meter measures the ozone flow directly. Likewise, it is displayed as a TEST function.

The M200AH displays all pressures in inches of mercury-absolute (in-Hg-A). Absolute pressure is the reading referenced to a vacuum or zero absolute pressure. This method was chosen so that ambiguities of pressure relative to ambient pressure can be avoided.

For example, if the vacuum reading is 25" Hg relative to room pressure at sea level the absolute pressure would be 5" Hg. If the same absolute pressure was observed at 5000 ft altitude where the atmospheric pressure was 5" lower, the relative pressure would drop to 20" Hg, however the absolute pressure would remain the same 5" Hg-A.

4.2.4. Computer Hardware and Software

The M200AH Analyzer is controlled by a micro computer. The computers' multitasking operating system allows it to do instrument control, monitor test points, provide analog output and provide a user interface via the display, keyboard and RS-232 port. These operations appear to be happening simultaneously but are actually done sequentially based on priority queuing system maintained by the operating system. The jobs are queued for execution only when needed, therefore the system is very efficient with computer resources.

The M200AH is a true computer based instrument. The microprocessor does most of the instrument control functions such as temperature control, valve switching. Data collection and processing are done entirely in the CPU with the final concentration values being sent to a D/A converter to produce the instrument analog output.

The computer memory is divided into 3 sections: ROM memory contains the multi-tasking operating system code plus the instructions that run the instrument. The RAM memory is used to hold temporary variables and current concentration data. The EEPROM memory contains the instrument set-up variables such as range and instrument ID number. The EEPROM data is nonvolatile so the instrument can lose power and the current set-up information is preserved.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

4.2.5. V/F Board

The computer CPU board communicates via 2 major hardware assemblies. These are the V/F board and the front panel display/keyboard. The V/F board communicates with the CPU via the STD-100 bus.

The V/F board includes of A/D input channels, digital I/O channels, and analog output channels. The computer receives all of the instrument data and provides all control functions through the V/F board.

4.2.6. Front Panel

The front panel of the M200AH is shown in Figure 2-5. The front panel consists of a 2 line display and keyboard, 3 status LED's and power switch. Communication with the display, keyboard, and status LED's is done via the computers on-board parallel port. The M200AH was designed as a computer controlled instrument, therefore all major operations can be controlled from the front panel display and keyboard.

The display consists of 2 lines of 40 characters each. The top line is divided into 3 fields, and displays information. The first field is the mode field.

The center field displays TEST values. The TEST functions allows you to quickly access many important internal operating parameters of the M200AH. This provides a quick check on the internal health of the instrument. The right hand field shows current concentrations values of NO, NOX, and NO2.

The M200AH can operate in any of 3 different sampling modes - NO only, NOX only, and NO/NOX switching mode. For the NO or NOX only modes just the single gas being measured is displayed. For the NO/NOX switching mode, the display scrolls between the NO, NOX, and NO2 concentration values every 4 seconds.

4.2.6.1. Keyboard

The second line of the display contains eight fields, each field defines the key immediately below it. By redefining the keys dynamically it is possible to simplify the instrument electronics and user interface.

4.2.6.2. Status LED's

At the right of the display there are 3 status LED's. They can be in three states, OFF, ON, and Blinking. The meanings of the LED's are given in Table 4-2.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 4-2: Front Panel Status LED's

LED State Meaning

Green Off

On Monitoring Blinking

Yellow Off

On Blinking

Red Off

Blinking

(1)

This occurs during Calibration, DAS holdoff, after power-up and in Diagnostic mode.

4.2.6.3. Power Switch

The power switch has two functions. The rocker switch controls overall power to the instrument, in addition it includes a circuit breaker. If attempts to power up the M200AH result in a circuit breaker trip, the switch automatically returns to the OFF position, and the instrument will not power up.

4.2.7. Power Supply Module

NOT monitoring, DAS disabled Monitoring normally, taking DAS data Monitoring, DAS in HOLDOFF mode

AutoCal disabled AutoCal enabled Calibrating

No warnings exist Warnings exist

(1)

The Power supply module supplies AC and DC power to the rest of the instrument. It consists of a 4 output linear DC power supply and a 15 volt switching supply. In addition, it contains the switching circuitry to drive the DC operated valves and several switched AC loads to operate the Rx cell heater, converter heaters and the ozone generator. The only voltages not generated in the PSM are the high voltage DC required by the PMT which is generated inside the sensor module and the high voltage AC used by the ozone generator.

4.2.8. Pump, Valves, Pneumatic System

A standard M200AH comes with 2 valves, the NO/NOX valve and the AutoZero valve, see Figure 4-2. Depending on the selected operating mode, the NO/NO

1. NO only mode - routes sample gas continuously into the reaction cell.

2. NO

3. NO/NO

The AutoZero valve provides a continuous zero reference. Periodically, the valve switches to turn off sample gas to the reaction cell. The ozone continues to flow. The zero reading is averaged and used to compensate subsequent readings for PMT zero offset.

only mode - routes sample gas continuously through the converter, then into the

reaction cell.

switching mode - switches gas alternately around, then through the converter to

measure NO, NO

, and by calculation NO2.

valve:

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

An external pump comes as standard equipment. The Pump Pack includes a vacuum pump and ozone scrubber. It is supplied with 0.25" tube fitting to connect to the exhaust fitting on the M200AH rear panel. See Figure 2-4 for hook-up information. The pump pack is turned on by plugging the power cord into an AC outlet, see Figure 4-3.

The pump is supplied as standard equipment, however if you are supplying a pump, it must have the following characteristics:

1. The pump must supply 2 slpm at 5"Hg-A.

2. The ozone scrubber must remove all ozone from the analyzer exhaust.

3. Connect the exhaust (Figure 2-4) to a pump with a <3 m length of 1/4" O.D. PTFE tubing.

Failure to meet the performance specifications will result in poor analyzer performance, damage to the pump, damage to the analyzer, and may jeopardize warranty repairs. Teledyne API strongly recommends that the factory supplied pump be used with the M200AH.

NOTE

On vacuum vs absolute pressure:

Many vacuum gauges read relative to ambient pressure, therefore

a reading of 25" of mercury (Hg) at sea level (which would give an

absolute pressure of about 5" Hg in the reaction cell) would read

only 20" Hg at high altitude sites. Therefore in this manual the vacuum

specification of 5" Hg pressure is given as an absolute pressure

- 5" Hg-A - reference against zero absolute pressure (a perfect vacuum) thus removing ambiguities for high altitude sites.

A 47 mm diameter sample filter is provided as standard equipment to remove particulate matter from the sample gas. It is important that the filter be maintained at regular intervals because particulates trapped on the filter have been shown to alter the concentration of the sample. A suggested schedule is shown in Section 8 - Maintenance. It should be noted however that more or less frequent maintenance may be required depending on the situation.

4-9

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 4-3: External Pump Pack

4-10

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

4.2.9. Ozone Generator

Because of the instability of ozone, it is necessary to generate this gas inside the analyzer. The ozone generation module consists of a switching power supply that drives a high voltage transformer and silent discharge tube. The generator’s dry air supply uses a membrane drier to supply air with a dew point of 0C or less. The exhaust side of the membrane is connected to the vacuum manifold at the rear of the instrument. A complete description and service requirements for this module can be found in Section 9.3.6.

Normal room air contains enough water vapor to damage the generator and components downstream, therefore the ozone GENERATOR MAY NOT TURN ON IMMEDIATELY AFTER POWER UP. The delay is built into the instrument to allow the dryer to start operating and purge the system with dry air. Table 4-3 details the conditions for turning on the ozone generator.

Table 4-3: Ozone Generator Start-up Timing

Time Since Last Power-up Ozone Gen State Program Action

< 1 hour ON at power-up Gen ON immediately after power-up. > 1 hour OFF at power-up Wait 30 min, then turn gen ON.

4.2.10. NO2 - NO Converter

The converter is a length of 1/8” tubing heated to 700C. The converter's function is to reduce nitrogen dioxide (NO2) to nitric oxide (NO). The temperature control for this module is done by the computer. To accurately measure converter efficiency, there should be oxygen present in the NO2 calibration gas.

For the converter to operate properly there should be a few

percent oxygen present in the sample stream.

NOTE

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

THIS PAGE IS INTENTIONALLY LEFT BLANK

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5. SOFTWARE FEATURES

The M200AH control software has two major operating modes. The SAMPLE mode is the normal mode when the instrument is taking data. The software menu that covers the SAMPLE mode is diagrammed in Figure 5-1.

When the instrument is initially installed, or problems indicate a need for diagnostics, the SETUP menu is used. The SETUP menu is diagrammed in Figure 5-2.

5.1. Index to Front Panel Menus

The next several pages contain two different styles of indexes that will allow you to navigate the M200AH software menus. The first two pages show a "tree" menu structure to let you see at a glance where each software feature is located in the menu. The second menu contains a brief description of each key mnemonic and a reference to the section of the manual that describes its purpose and function in detail.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 5-1: Sample Menu Tree

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 5-2: Setup Menu Tree

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 5-3: Setup Menu Tree- Units with O2 Sensor

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Figure 5-4: Setup Menu Tree – Units with O2 Sensor

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.1.1. Sample Menu

Table 5-1: M200AH Sample Menu Structure

Level 1 Level 2 Level 3 Level 4 Level 5 Description

TEST TST>

CAL Zero/Span calibration w/ gas through sample

CALZ Zero calibration w/ zero gas from zero valve

CALS Span calibration w/ span gas from low or high

LOW/

ZERO Press ZERO then ENTR will zero analyzer 5.2.2.3,

SPAN Press SPAN then ENTR will span analyzer 5.2.2.5,

CONC Expected NO/NOx span concentrations and

Test functions 5.2.1,

port

option

concentration span valve option

Only present if AutoRange is selected. Used

HIGH

to select which range instrument will be calibrated in. Selects which slopes, offsets, expected span values, etc. will be updated and displayed.

Conv efficiency setup

Reference Section

Table 9-1

5.2.2.1, 7.1

5.2.2.3,

7.1, 7.2

5.2.2.4,

7.1, 7.2

5.3.4.2, 7.8

7.1, 7.2

7.1, 7.2,

5.2, 2.3 Table 7-3

NOX

CONC

CONV Sub-menu for converter efficiency setup and

NO2 Expected NO2 concentration for converter

CAL Automatic converter efficiency calibration

SET Set the converter efficiency manually 5.2.2.7,

SETUP The SETUP Menu - See next table. Table 5-2

Enter expected NOx span concentration 5.2.2

Table 7-3

Enter expected NO span concentration 5.2.2,

Table 7-3

5.2.2.7,

verification

efficiency calculation

and entry

7.11

5.2.2.7,

7.11

5.2.2.7,

7.11

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.1.2. Set-Up Menu

Table 5-2: M200AH Setup Menu

Level 1 Level 2 Level 3 Level 4 Description

CFG CFG is primarily used for showing

special configuration options and factory special software.

PREV,

NEXT,

LIST AUTOCAL Automatic span check or calibration 5.3.2 PREV

SEQUENCE

MODE Choose from a list of 7 modes plus

PREV Scroll back to choose type of

NEXT Scroll forward to choose type of

PREV, NEXT can be used to scroll

through the configuration list. LIST automatically scrolls the list.

Select a sequence of pre programmed

calibration commands Scroll backwards

Select a sequence of pre programmed

calibration commands Scroll forwards

disable

calibration performed

Reference Section

5.3.1

5.3.2

7.7

DISABLE Disable selected calibration sequence. 7.7 ZERO Do a zero calibrate 7.7 ZERO-LO Do a zero and low span calibrate 5.3.2, 6.2 ZERO-HI Do a zero and high span calibrate 5.3.2, 6.2

(table continued)

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 5-2: M200AH Setup Menu (Continued)

Level 1 Level 2 Level 3 Level 4 Description

ZERO-LO-

HI LO Do a low span calibrate 5.3.2, 6.2 HI Do a high span calibrate 5.3.2, 6.2 LO-HI Do a low and high span calibrate 5.3.2, 6.2 SETTINGS TIMER

ENABLE

START

DATE

START

TIME

DELTA

DAYS

DELTATI

DURATION Number of minutes to spend at each

Enable/Disable chosen sequence 5.3.2,6.2

Start date of selected sequence 5.3.2, 6.2

Start time of selected sequence 5.3.2, 6.2

Number of days to shift start time

Number of hours to shift start time

Do a zero, low, and high span calibrate

each time sequence is run

step in sequence

Reference Section

5.3.2, 6.2

CALIBRA

RANGE

TO CAL

ON=compute new slope and/or offset

If AutoRange is ON, select which

5.3.2, 6.2

OFF=do a span/zero check

5.3.2, 6.2

range to calibrate LO or HI

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 5-3: M200AH Setup Menu

Level 1 Level 2 Level 3 Level 4 Level 5 Description

DAS Data Acquisition menu 5.3.3 VIEW Select which DAS data collector to view 5.3.3 PREV-

NEXT EDIT UP Examine the DAS data buffer UP10 Move UP 10 averages in the DAS data

DOWN Examine the DAS data buffer - move

DOWN10 Move DOWN 10 averages in the DAS

RANGE Sets the output range 5.3.4 MODE Type of range output 5.3.4 SING All 3 outputs are on the same single

AUTO All 3 outputs AutoRange between 2

Scroll through data collectors CONC,

PNUMTC, CAL DAT

buffer

down and display next average

data buffer

range

different ranges

Reference Section

5.3.4.1

5.3.4.2

REM Same as AutoRange, except external

contacts set range IND Each range can be set independently 5.3.4.3 OFFS Allows a offset bias voltage to all

analog output channels UNIT Unit selection menu 5.3.4.6 PPM Selects PPM units 5.3.4.6 MGM Selects milligrams per cubic meter units 5.3.4.6 SET IF

SINGLE

AUTO OR REM

INDEP

DIL Sets dilution factor. 5.3.4.5

SET Sets the ran ge of the instrument if in

SINGLE range mode

LO/HI Sets the low and high ranges for

AUTORANGE or Remote Range.

NO NOX

NO2

Sets each INDEPENDENT range.

5.3.4.2

5.3.6

5.3.4.1

5.3.4.2

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 5-4: M200AH Setup Menu

Level 1 Level 2 Level 3 Level 4 Level 5 Description

PASS Password protection 5.3.5 ON/OFF Enable password protection of

calibration and setup menus. CLOCK Time of day clock 5.3.6 TIME Set the time of day 5.3.6 DATE Set the date 5.3.6 MORE Drop to next lower level of menus COMM Communications setup menu 5.3.8 BAUD Set the BAUD rate, there are more RS-

232 options in the VARS menu. ID Set the instrument ID 5.3.8 VARS Internal software variables 5.3.9 PREV,

NEXT, JUMP, EDIT

PREV, NEXT scroll up and down

through the VARS menu. Jump will go

to variable number selected, EDIT will

allow changing the selected variable.

Reference Section

5.3.5

5.3.8

5.3.9

VARS User level variables. 5.3.9 DIAG Diagnostic menu 5.3.7, 9 PREV,

NEXT, JUMP

8 DIAG

EXIT Exit from the SETUP menu 9.1

PREV, NEXT scroll up and down

through the DIAG menu.

There are 8 diagnostic menus for testing

MODES

various sections of the M200AH

5.3.7, 9

9.1.3

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.2. Sample Mode

5.2.1. Test Functions

NOTE

In any of the following TEST functions, if a value of

XXXX is displayed, that indicates an off scale and

therefore meaningless reading.

TEST functions allow the operator to examine several important operating parameters of the M200AH to verify correct Analyzer operation. If faults are discovered, refer to Troubleshooting Section 9.

Range (RANGE)

This is the Range of the instrument. In single range mode there is one range for all 3 rear panel analog outputs.

The AutoRange option allows 2 different ranges for each channel, and will automatically switch to the other range dynamically as concentration values require. By selecting Remote AutoRange, the range change can be controlled remotely. The TEST values will show the range the instrument is currently operating in, and will dynamically display range change information when necessary.

Independent range option allows different ranges for each output. When enabled, there will be three range values displayed, NO, NOX and NO2.

NOTE

Each of the range modes Single range, Auto range, and

Independent ranges are mutually exclusive.

Oxygen Sensor Range (O2 RANGE) (Option)

For units equipped with the O2 Sensor Option, this is the Full Scale Range of the rear panel O analog output.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Signal Stability (STABIL, NOX STB)

The instrument noise is computed by calculating the standard deviation of the last 10 minutes of concentration data. If NO/ NOX switching mode is selected, the noise reading is that of the NOX channel. If NO only or NOX only mode is selected the Noise applies to the mode selected. The noise value only becomes meaningful if sampling a constant concentration for more than 10 minutes. The noise value should be compared to the value observed in the factory check-out.

Sample Flow (SAMP FLW)

The SAMPLE FLOW test function is computed from the pressure measured up-stream of the sample flow orifice. The pressure down-stream of the orifice is also checked to assure the assumptions of the equation are valid. This will register variations in flow caused by changes in atmospheric pressure, but will not detect a plugged sample flow orifice. The sample flow into the reaction cell is 50  10 cc/min with a bypass flow of 250 cc/min  50. The instrument reports a flow of 290  50 cc/min.

Ozone Flow (OZONE FLW)

The OZONE FLOW test function is directly measured by a solid state flow meter. Variations in this value indicate variations in ozone flow. The nominal value for ozone flow is 250  10 cc/min.

PMT Voltage (PMT)

The PMT VOLTAGE measures the PMT signal at the output of the preamp board. The waveform of the PMT voltage can be complex, and vary from near 0 mV when zero gas is in the reaction cell to 5000 mV when there is large amounts of NO being measured. If the PMT reading is consistently 5000 mV, that indicates an off-scale reading. Typical readings bounce around, which is normal.

AutoZero Voltage (AZERO)

The AutoZero Voltage is the PMT output when the AutoZero valve is actuated. It provides a zero reference which is subtracted from all NO and NO

readings. The value typically will be

near 0 mV. Readings in the range –10 to +50 mV are acceptable. High readings indicate a light leak in the reaction cell, recent exposure of the PMT to light, or contamination in the reaction cell.

High Voltage Power Supply Voltage (HVPS)

The HVPS reading is a measure of the scaled-up HVPS programming voltage. The voltage used to set the HVPS output is generated on the Preamp board. Its value is between 0 and 1 volt, corresponding to a voltage of 0 to 1000 volts out of the HVPS. The HVPS front panel TEST measurement should typically be in the range of 400-600V.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

DC Power Supply Voltage (DCPS)

The DCPS voltage is a composite of the 5 and  15 VDC voltages in the Power Supply Module. This is meant to be a quick indicator to show if the PSM is working correctly. The nominal value is 2500 mV  200 mV.

Reaction Cell Temperature (RCEL TEMP)

This is a measurement of the temperature of the reaction cell. It is controlled by the computer to 50  2C. Temperatures outside this range will cause the M200AH output to drift.

Box Temperature (BOX TEMP)

This TEST function measures the temperature inside the chassis of the M200AH. The temperature sensor is located on the Status/Temp Board. Typically it runs 2 to 10C higher than the ambient temperature. The M200AH has been engineered to maintain stable output over 5 to 40C ambient temperature range.

PMT Temperature (PMT TEMP)

The temperature of the PMT is closely controlled by a dedicated proportional temperature controller. The nominal set-point is 7  1C. Readings outside this range will cause instrument drift due to gain changes in the PMT detector.

Block Temperature (BLOCK TEMP)

The block temperature is the temperature of the sample flow orifice. The block is mounted near the rear of the instrument and is located upstream of the converter. Running the converter at low pressure improves its conversion efficiency. The normal temperature of the sample orifice block is 50  2C, and is controlled by the computer.

Oxygen Sensor Temperature (O2 TEMP) (Option)

For instruments equipped with O Temp reading and is the temperature of the oven housing the O

sensor option, the O2 temperature reading replaces the Block

sensor. Also included the oven

is the sample flow control orifice. The normal temperature of the oven is 50  2°C, and is controlled by the computer.

Converter Temperature (CONV TEMP)

The converter temperature monitors the temperature of the NO

-to-NO converter and is

controlled by the computer. The nominal set-point is 700  10°C. The temperature sensor inside the converter is a type-K thermocouple. The thermocouple amplifier is located on the STATUS/TEMP board. If the thermocouple breaks, the circuit will turn off power to the heater.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

If the analyzer is equipped with the molybdenum converter option the TEST function will report MOLY TEMP, the temperature setpoint will be 315  10°C.

If the analyzer is equipped with the Model 501 external converter option, the converter temperature is shown on the front panel of the M501. The TEST function O3KL will report the temperature of the catalytic ozone killer located inside the converter can.

Reaction Cell Pressure (RCEL)

The pressure in the reaction cell is measured by a solid state pressure sensor which measures absolute pressure. Absolute pressure was chosen because it is an unambiguous measure of cell pressure. This pressure will vary depending on several things.

1. The type of pump attached to the analyzer.

2. Variations in local weather will cause a  0.3 in-Hg change in pressure.

3. The altitude of the analyzer will cause the cell pressure to change. Nominal values are 3 to 10 in-Hg-A. Typical reading is about 5 in-Hg-A at sea level for the

standard pump.

Sample Pressure (SAMP)

The sample pressure is measured by one of the pressure sensors on the sensor board. The sample pressure typically runs slightly below atmospheric pressure. Sample pressure will change with varying atmospheric pressure (like the weather) because the sensor is an absolute pressure sensor. It will also change with altitude.

NOX, NO, O2 Slope and Offset Values (NOX SLOPE, NOX OFFS, NO SLOPE, NO OFFS, O2 SLOPE, O2 OFFS)

The slope (m) and intercept (b) coefficients of straight line equations (y = mx + b) determine the calibration of the M200AH. The slope parameter(m) can be thought of as a gain term which determines the steepness of the calibration curve. The offset (b) parameter compensates for differences in the background signal of the NO and NO

channels. This is primarily due to the

background of the converter. These parameters contain valuable information about the quality and validity of the calibration.

For example the NO and NOX slope values should not differ by more than 0.1 from each other. Larger values indicate a flow imbalance such as a leak or problems with the converter. Refer to Section 7.10 Calibration Quality for details on how to use these values.

Time (TIME) This is the output of the internal time of day clock.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.2.2. CAL, CALS, CALZ, Calibration Functions

The calibration and zero/span checking of the M200AH analyzer is treated in detail in Section 7, Table 7-1 summarizes types of calibration.

5.2.2.1. CAL, CALS, CALZ

The CAL, CALS, and CALZ keys control the calibration functions of the analyzer. In the CAL mode the analyzer can be calibrated with zero/span gas coming in through the sample input port on the rear panel. If the analyzer is equipped with the Zero/Span valve option, the CALZ and CALS buttons operate the Zero/Span valves. The setup of this option is covered in Section 6.2, and operation is explained in Section 7.

5.2.2.2. Gas To Cal

For units equipped with the Oxygen Sensor Option, depressing the CAL key will cause the instrument to prompt for which gas sensor to calibrate; NOX or O2. After the desired gas is selected, the instrument will display ZERO, SPAN, and CONC keys as described below.

5.2.2.3. Zero

Pressing the ZERO key along with ENTR will cause the instrument to adjust the OFFSET value of the internal formulas so that the instrument reads zero. The M200AH allows zero adjustment over a limited range of signal levels, therefore the signal does not have to be exactly zero for the instrument to do a zero cal. The instrument will not, however, allow a zero cal on any signal level, therefore it is not possible to zero the instrument with high concentrations of span gas in the reaction cell. If the ZERO key does not come on as expected, check Section 9.2.9.

5.2.2.4. Span

Pressing the SPAN key along with ENTR will cause the instrument to adjust the SLOPE value of the internal formula so the instrument displays the span value. The expected NO concentrations must be entered before doing a SPAN calibration. See Table 7-3.

Like the Zero calibration, the Span cal cannot be done with any concentration of span gas. If signal level is outside certain limits the SPAN key will not be illuminated. If you encounter this condition see Section 9.2.8. It is also possible at low levels of span concentration that BOTH the ZERO and SPAN keys might be on, thus allowing you to either zero or span the instrument. In this case care must be taken to perform the correct operation or the analyzer can become misscalibrated.

, NO span

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.2.2.5. NO, NOX and O2 Cal Concentration

Before the M200AH can be spanned, it is necessary to enter the expected span concentrations for NO and NOX. In single range mode there is one value each for the NO, NOX and O2 expected span values. The span values are entered by pressing CAL-CONC-NO or CAL-CONC-NOX or CAL-O2-CONC keys for NO , NO

and O2 span concentrations respectively.

If AutoRange is enabled, there is a different slope and offset for each of the 2 ranges for a total of 4 expected span concentrations. Therefore there will be 2 span concentrations for NO and 2 span values for NOX. When AutoRange is enabled, the path to the expected span concentrations contain an extra step. For the LOW concentration range the path is CAL-LOW-CONC-NO for NO, and CAL-LOW-CONC-NOX for NO

. For the HIGH concentration range the pathways are

CAL-HIGH-CONC-NO and CAL-HIGH-CONC- NOX. These values must be entered to correctly calibrate the instrument.

5.2.2.6. Formula Values

The slope and offset terms should be checked after each calibration. The values for these terms contain valuable information about internal health of the analyzer. The range of acceptable values and their meanings is given in Section 7.10.

To compute the NOX and NO or O2 concentrations, the formula for a straight line is used. Where: y = the NOx or NO or O2 concentration

m = the slope x = the conditioned sensor output b = the offset y = mx + b

In comparison with analog analyzers the slope term is equivalent to the "span pot" and the b term is equivalent to the "zero pot". Again, like an analog analyzer there is only a limited range of adjustment allowed for either term, and there are consequences of having the values near the high or low limits of their respective adjustment ranges.

The (x) term is the conditioned PMT signal. PMT signal is adjusted for current zero, AutoZero value, range, temperature, and pressure.

The offset (b) term is the total background light. Therefore in the case of the NO channel the b term should be very close to zero. The (b) for the NO

channel is often slightly higher than the

term for the NO channel. The extra background is mostly from the converter. The (b) term incorporates the PMT reading, the AutoZero value, the current span value, temperature and pressure compensation factors.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Because the span calibration calculation includes zero calibration data and zero calibration includes span calibration data, the zero and span calibrations can be performed in any order and the instrument will be accurately calibrated either way.

After every zero or span calibration, it is very important to check the QUALITY of the calibration. The calibration of the M200AH involves balancing several sections of electronics and software to achieve an optimum balance of accuracy, noise, linearity and dynamic range.

See Section 7.10 for the calibration quality check procedure.

5.2.2.7. Automatic Converter Efficiency Compensation

The M200AH can automatically compensate the NO efficiency. There are 2 ways to enter the converter efficiency into the instrument. If the instrument is in single or independent range modes, there is just one converter efficiency parameter. If the converter efficiency is determined by some outside method, the efficiency coefficient can be keyed in as a decimal fraction through the front panel. The path is CALCONC-CONV-SET. The second method is to have the M200AH compute the efficiency using the CAL-CONC-CON-CAL menu. See the Calibration Section 7.11 - Converter Efficiency for details.

If AutoRange is enabled there will be 2 converter efficiencies, one for low range and one for high range. The procedure is identical for each range. To access the converter efficiency menu, the path is CAL-LOW-CONC-CONV for LOW range and CAL-HIGH-CONC-CONV for HIGH range. If NO

or NO ONLY mode is set, the converter efficiency is disabled with the value set to

1.0000. To disable the compensation, press CAL-CONV-SET and enter 1.0000 as the efficiency. Factory

default is 1.0000.

5.3. Set-Up Mode

and NO2 readings for the converter

5.3.1. Configuration Information (CFG)

This menu item will tell if the installed software has factory special features or other nonstandard features. If you call Teledyne API service you may be asked for information from this menu.

5.3.2. Automatic Calibration (AutoCal)

The AutoCal feature allows the M200AH to automatically operate the Zero/Span Valve option. This option allows a variety of periodic instrument calibrations and calibration checks. Information on setting up AutoCal is in Section 6.2.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.3.3. Data Acquisition System (DAS)

The M200A contains a flexible and powerful built in data acquisition system (DAS) that enables the analyzer to store concentration data as well as diagnostic parameters in its battery backed memory. This information can be viewed from the front panel or printed out through the RS-232 port. The diagnostic data can be used for performing “Predictive Diagnostics” and trending to determine when maintenance and servicing will be required.

The logged parameters are stored in what are called “Data Channels.” Each Data Channel can store multiple data parameters. The Data Channels can be programmed and customized from the front panel. A set of default Data Channels has been included in the M200A software. For more information on programming custom Data Channels, a supplementary document containing this information can be requested from Teledyne API.

5.3.3.1. Data Channels

The function of the Data Channels is to store, report, and view data from the analyzer. The data may consist of NO, NOX, NO flow or reaction cell pressure.

concentration, or may be diagnostic data, such as the sample

2, O2

The M200AH comes pre-programmed with a set of useful Data Channels for logging concentration and predictive diagnostic data. The default Data Channels can be used as they are, or they can be changed by the user to fit a specific application. They can also be deleted to make room for custom user-programmed Data Channels.

The data in the default Data Channels can be viewed through the SETUP-DAS-VIEW menu. Use the PREV and NEXT buttons to scroll through the Data Channels and press VIEW to view the data. The last record in the Data Channel is shown. Pressing PREV and NEXT will scroll through the records one at a time. Pressing NX10 and PV10 will move forward or backward 10 records. For Data Channels that log more than one parameter, such as PNUMTC, buttons labeled <PRM and PRM> will appear. These buttons are used to scroll through the parameters located in each record.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

The function of each of the default Data Channels is described below:

CONC:

PNUMTC:

CALDAT:

Samples NO

, NO and NO2 (NOX, NO and O2 if the instrument is equipped

with the Oxygen option) concentration data at one minute intervals and stores an average every hour with a time and date stamp. Readings during calibration and calibration hold off are not included in the data. The last 800 hourly averages are stored.

Collects sample flow and sample pressure data at five minute intervals and stores an average once a day with a time and date stamp. This data is useful for monitoring the condition of the pump and critical flow orifice (sample flow) and the sample filter (clogging indicated by a drop in sample pressure) over time to predict when maintenance will be required. The last 360 daily averages (about 1 year) are stored.

Logs new slope and offset every time a zero or span calibration is performed, also records the sample concentration reading just prior to performing a calibration.

NOTE: This Data Channel collects data based on an event (a calibration) rather than a timer. This Data Channel will store data from the last 200 calibrations. This does not represent any specific length of time since it is dependent on how often calibrations are performed. As with all Data Channels, a time and date stamp is recorded for every data point logged.

Table 5-5: DAS Data Channel Editing

Step Action Comment

Press SETUP-DAS-EDIT Press PREV/NEXT Press EDIT Press SET> (5 times)

Press EDIT Toggle OFF to ON Press ENTR Press EXIT (4 times)

Enter DAS menu to edit Data Channels Select Data Channel to edit Enter the Edit menu for the selected Data Channel Scroll through Data Channel properties until RS-232

REPORT: OFF is displayed Edit selected setup property Change RS-232 REPORT property Accepts change Exits back to sample menu

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

5.3.4. Range Menu

For NOX measurements, the instrument operates on any full scale range from 5 to 5,000 ppm. The range is the concentration value that equals the maximum voltage or current output on the rear panel of the instrument.

If the range you select is between 5 and 500 ppm the front panel will read the concentration anywhere from 0 to 500 ppm regardless of the range selected. If the range selected is from 501 to 5,000 ppm the front panel will read from 0 to 5,000 ppm. The apparently wider range of front panel readouts is because the M200AH has 2 internal hardware ranges, namely 0-500 ppm and 0-5,000 ppm. The analog output is scaled for the range selected, however the front panel reading can display correct concentrations over the entire physical range.

For O2 measurements (option), the instrument operates on any full scale range from 5 to 100 percent. The range is the concentration value that equals the maximum voltage or current output on the rear panel of the instrument.

NOTE

Only one of the following range choices can be active at any one time.

There are 3 range choices for NOX measurements (O2 Measurements are always made on a single range):

1. Single Range

2. Auto Range A. Remote Range

3. Independent Ranges

5.3.4.1. Single Range (NO

Measurements)

This range option selects a single range for all output channels (NO, NOX, NO2) of the M200AH. To select Single Range press SETUP-RNGE-MODE-SING, then press ENTR. To set the value for the range press SETUP-RNGE-SET, and enter the full scale range desired from 5 ppm to 5,000 ppm.

5.3.4.2. Auto Range and Remote Range (NO

Auto Range allows each of the 3 output signals (NO, NOX, NO2) to automatically range between a low value and a higher value. The Hi range mode is signaled by a bit on the STATUS connector see Table 5-8. When the instrument output increases to 98% of the low range value it will Auto Range into Hi range. In Hi range, when the output decreases to 75% of low range it will change to the lower range. If you select a Hi range that is less than Low range, the M200AH will remain locked in Low range and behave as a Single Range instrument.

Measurements)

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

To set up Auto Range press SETUP-RNGE-MODE-AUTO, then press ENTR. To set the values press SETUP-RNGE-SET. The M200AH will prompt you for LO, then HI which is the lower and upper ranges of Auto Range. Key in the value desired, then press ENTR.

Remote Range works the same as AutoRange except that the LO/HI range decision is made via remote status inputs on the rear panel, see Figure 2-2 for pinout. Calibration of Remote Range is also the same as for AutoRange see Section 7.8. To select Remote AutoRange press SETUPRNGE-MODE-REM, then press ENTR.

5.3.4.3. Independent Ranges (NO

Independent Ranges allows you to select different ranges for NO, NO To set up Independent Ranges press SETUP-RNGE-MODE-IND, then press ENTR. To set the

values press SETUP-RNGE-SET. The M200AH will prompt you for the range of NO, NO NO

channels. Key in the desired range for each channel, then press ENTR after each value.

5.3.4.4. O2 Range

To set the value for the range press SETUP-RNGE-SET-O2, and enter the full scale range desired from 5 percent to 100 percent.

5.3.4.5. Dilution Ratio

The dilution feature allows the M200AH to be used with a stack dilution probe. With the Dilution feature you can select the range and display the concentration at the value and units of the un-diluted gas in the stack. The dilution probe dilutes the gas by a fixed ratio so the analyzer is actually measuring a much lower concentration than is actually present in the stack.

The software scales the diluted sample gas concentration readings so that the outputs show the actual stack concentrations. Also, when calibrating the instrument or setting the ranges the values selected are scaled to reflect the actual stack concentrations. The scaled readings are sent to the display, analog outputs, and RS-232 port.

Measurements)

, and NO2.

and

To use the Dilution feature:

1. SELECT UNITS

For stack measurement, select PPM units. To set units, press SETUP-RANGE-UNIT-PPM. Press ENTR after the unit selection is made, then EXIT to return to upper level menus.

2. SET DILUTION RATIO

The dilution ratio of the probe is entered by SETUP-RANGE-DIL. Accepted values are 1 to

1000. Press ENTR, and EXIT to return to upper level menus. A value of 1 disables the dilution

feature.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

3. SELECT RANGE

The range selection is the same with dilution as with normal monitoring. See Section 5.3.4 for information on range selection. You should note however, the value entered should be the actual concentration of the calibration gas entering the dilution probe. The units of this number is ppm.

4. CALIBRATION

When the above selections have been made, the instrument now must be calibrated through the dilution probe.

NOTE

Units are now in PPM. See Section 7.1 for calibration methods.

5.3.4.6. Concentration Units

The M200AH can display NOX concentrations in ppm or mg/m3 and if equipped with the Oxygen Sensor option, displays O2 concentrations in %. To change the current NOX units press SETUP-RANGE-UNIT. Select PPM or MGM, then press ENTR. Remember, you should now reset the expected span concentration values in the new units and re-calibrate the instrument using one of the methods in Section 7. The following equations give approximate conversion values. The exact values depend on the standard temperature and pressure used by your regulatory agency.

NO ppm x 1.34 = NO mg/m NO2 ppm x 2.05 = NO2 mg/m

Changing units affects all of the RS-232 values, all of the

display values, and all of the calibration values.

If the current units are in ppm with the span value at 400 ppm, and the units are changed to mg/m3 the span value is NOT re-calculated

to the equivalent value in mg/m3. Therefore the span value now

becomes 400 mg/m3 instead of 400 ppm. Re-enter the expected

span concentrations in mg/m3 units and recalibrate.

NOTE

Example:

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5.3.4.7. Recorder Offset

If necessary, a recorder offset can be introduced into the analog output voltages. This can be used to bias the output voltage or current 10%. It is intended for older design chart recorders that cannot show slightly negative readings. It can also be used to bias the input to a datalogger to offset small external ground loop voltages that are sometimes present in monitoring systems. To set the recorder offset, press SETUP-RANGE-OFFS and enter the offset voltage desired in percent. The recorder offset will bias both the recorder and DAS analog outputs.

5.3.5. Password Enable

If passwords are enabled, one of the values shown in Table 5-6 are required to calibrate or setup the instrument. If the 512 password is known, only calibrations can be performed. If the 818 password is known, the SETUP mode can be accessed. The 101 password can be used to enter both calibration and SETUP menus. A list of passwords is in Table 5-6.

Table 5-6: Calibrate, Setup Passwords

Password Usage Password

Calibration Password Use to get into CAL menus 512, 101 Setup Password Use to get into SETUP menus 818, 101

5.3.6. Time of Day Clock

The instrument has an internal time of day clock. The time of day can be set by pressing SETUPCLOCK-TIME and entering the time in 24hr format. In a similar manner the date can be entered by pressing SETUP-CLOCK-DATE and entering the date in a dd-mmm-yy format. If you are having trouble with the clock running slow or fast, the speed of the clock can be adjusted by selecting the CLOCK_ADJ variable in the SETUP-MORE-VARS menu.

5.3.7. Diagnostic Mode

The M200AH Diagnostic Mode allows additional tests and calibrations of the instrument. These features are separate from the TEST functions because each DIAG function has the ability to alter or disable the output of the instrument. While in DIAG mode no data is placed in the DAS averages. Details on the use of Diagnostic mode are in Section 9.1.3.

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5.3.8. Communications Menu

The COMM menu allows the RS-232 BAUD rate to be set. To set the BAUD rate press SETUPMORE-COMM-BAUD, select the appropriate BAUD rate, then press ENTR.

The instrument ID number can also be set. This ID number is attached to every RS-232 message sent by the M200AH. To set the ID press SETUP-MORE-COMM-ID and enter a 4 digit number from 0000-9999, then press ENTR. There are more RS-232 setups in the VARS menu Section 5.3.9.

5.3.9. Variables Menu (VARS)

This menu enables you to change the settings on certain internal variables. The VARS are defined in Table 9-5 which is located in the Troubleshooting Section 9.1.4.

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5.4. M200AH Operating Modes

The M200AH has two main operating modes. The instrument is normally in SAMPLE mode when it is taking data or doing a calibration. The second main mode is the SETUP mode. In this mode the many features of the instrument can be altered, enabled or disabled. Within these two main modes there are many other operating modes which are shown in Table 5-7. The mode the instrument is operating in is shown in the upper left of the front panel display.

Table 5-7: M200AH Operating Modes

Mode Description

ZERO CAL D Automatic dynamic zero calibration ZERO CAL A Automatic zero calibration ZERO CAL R Remote zero calibration ZERO CAL M Manual zero calibration SPAN CAL D Automatic dynamic span calibration SPAN CAL A Automatic span calibration SPAN CAL R Remote span calibration SPAN CAL M Manual span calibration M-P CAL Manual multi-point calibration DIAG ELEC Electrical diagnostic test DIAG OPTIC Optical diagnostic test DIAG OZONE Ozone generator diagnostic test DIAG AOUT D/A output diagnostic test DIAG Main diagnostic menu DIAG I/O Signal I/O diagnostic DIAG RS232 RS232 output diagnostic SETUP x.x Setup mode (X.X is software version) SAMPLE ZS Sampling; automatic dynamic zero and span calibration enabled SAMPLE Z Sampling; automatic dynamic zero calibration enabled SAMPLE S Sampling; automatic dynamic span calibration enabled SAMPLE A Sampling; automatic cal. Enabled SAMPLE Sampling; automatic cal. Disabled

5.4.1. NO/NOx/NO2 Switching Mode

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This is the most common mode of operation. It provides continuous output of NO, NOX and NO2 gas concentrations. To select switching mode press SETUP-MORE-VARS-ENTR and press NEXT to scroll to the MEASURE-MODE variable. Set the value of this variable to NO NOX, then press ENTR. Press EXIT to return to SAMPLE mode.

5.4.2. NOX Only Mode

In this mode only NOX is measured. The converter is in the sample stream continuously. The output of the detector is sampled continuously. Since only NOX is being measured, there are 2 advantages to this mode. First, it is possible to optimize for shortest response time. Second, NOX is being continuously measured so that short transient events can be captured.

NOTE

It is not possible to apply converter efficiency compensation to the NOX reading.

The NOX reading is composed of a NO component and a NO2 component. The NO2 component is the only one impacted by the converter efficiency, and since the instrument is always in NOX mode it is not possible to know the fraction of the NOX reading that is NO2.

To select NOX only mode press SETUP-MORE-VARS and press NEXT to scroll to the MON_MODE variable. Set the value to NOX, then press ENTR. Press EXIT to return to SAMPLE mode.

5.4.3. NO Only Mode

In this mode only NO is measured. The converter is always out of the sample stream. The output of the detector is sampled continuously. Since only NO is being measured, there are 2 advantages to this mode. First, it is possible to optimize for shortest response time. Second, NO is being continuously measured so that short transient events can be captured.

To select switching mode press SETUP-MORE-VARS and press NEXT to scroll to the MON_MODE variable. Set the value of this variable to NO, then press ENTR. Press EXIT to return to SAMPLE mode.

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5.5. 4-20 mA Current Loop

The analog signal output is available on the rear panel as a voltage or 4-20 mA current output. Optionally the current loop outputs can be isolated. See Section 6.3 for a description of isolated current loop outputs.

The current outputs come out on the same terminals that are used for voltage outputs see Figure 2-2. The NO, NOx, NO2 and Test Channel outputs have current loop capabilities. See Troubleshooting Section 9.3.4.4 for electrical specifications.

The factory default is voltage outputs. To convert from voltage to current loop, move the jumpers on the motherboard from the default B-C (rear pins) position to the A-B (forward pins) position. See the 01110 Motherboard schematic in the Appendix.

5.6. Status Output

The status output is an option that reports Analyzer conditions via contact closures on the rear panel. The closures are available on a 50 pin connector on the rear panel. The contacts are NPN transistors which can pass 50 ma of direct current. The pin assignments are listed in Table 5-8.

Table 5-8: Status Output Pin Assignments

Output # Pin # Definition Condition

1 1,2 ZERO CAL CLOSED IN ZERO CAL 2 3,4 SPAN CAL CLOSED IN HIGH SPAN CALIBRATION 3 5,6 FLOW ALARM CLOSED IF FLOW WARNING 4 7,8 TEMP ALARM CLOSED IF ANY TEMP WARNING 5 9,10 DIAG MODE CLOSED IN DIAG MODE 6 11,12 POWER OK CLOSED IF SYSTEM POWER OK 7 13,14 CONC ALARM CLOSED IF CONCENTRATION

WARNING 8 27,28 LOW SPAN CAL CLOSED IN LOW SPAN CALIBRATION 9 SPARE

10 19,20 AUTORANGE - HI CLOSED IF IN HIGH RANGE 11 21,22 SYSTEM OK CLOSED IF NO FAULTS PRESENT 12 23,24 RX CELL PRESS CLOSED IF ABS PRES > 15" HG

The Status Board schematic can be found in the Appendix Drawing 01087.

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5.7. RS-232 Interface

The RS-232 communications protocol allows the instrument to be connected to a wide variety of computer based equipment. The interface provides two basic functions in the M200AH.

1. First is a comprehensive command interface for operating and diagnosing the analyzer. The

command set can be used interactively or operated via stored program. This interface has, in fact, more capabilities than the front panel keyboard.

2. The interface can provide an audit trail of analyzer events. In this function the port sends out

messages about instrument events like calibration or warning messages. If these messages are captured on a printer or remote computer, they provide a continuous audit trail of the analyzers operation and status.

5.7.1. Setting up the RS-232 Interface

The baud rate is set from the front panel by SETUP-MORE-COMM-BAUD. Select the baud rate appropriate for your application from 300 to 19,200. It is important to note that the other device must have identical settings in order for the communications to work correctly.

Second is physical wiring of the analyzer to the other unit. We have incorporated into the Analyzer LED's that signal the presence of data on the communications lines, and also a switch which can easily re-configure the analyzer from DCE to DTE if necessary. In addition, the front panel diagnostics allow test data streams to be sent out of the port on command. This flexibility and diagnostic capability should simplify attaching our equipment to other computers or printers. If problems occur, see the Troubleshooting Section 9.3.2.

Setup from the Front Panel There are 3 additional RS-232 setups that can be done via the front panel.

1. Set the Instrument ID number by SETUP-MORE-COMM-ID, and enter a 4 digit number

from 0000-9999. This ID number is part of every message transmitted from the port.

2. Set the BAUD rate by SETUP-MORE-BAUD, then select the desired BAUD rate.

3. Set the RS-232 mode bit field in the VARS menu. To get to the variable press, SETUP-

MORE-VARS and scroll to RS-232_MODE, then press EDIT. The possible values are:

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Table 5-9: RS-232 Port Setup - Front Panel

Decimal

Value

1 Turns on quiet mode (messages suppressed) 2 Places analyzer in computer mode (no echo of characters) 4 Enables Security Features (Logon, Logoff)

8 Enables RS-232 menus display on M200AH front panel display 16 Enable alternate protocol 32 Enable RS-232 multidrop protocol

Description

NOTE

To enter the correct value, ADD the decimal values of the features you

want to enable. For example if LOGON and front panel RS-232

menus are desired, the value entered would be 4 + 8 = 12.

Security Feature

The RS-232 port can be connected to a public telephone line which could compromise instrument security. If the LOGON feature is implemented, the port has the following attributes:

1. A password is required before the port will operate.

2. If the port is inactive for 1 hour, it will automatically LOGOUT.

3. Repeat attempts at logging on with incorrect passwords will cause subsequent logins to be

disabled for 1 hour.

4. If not logged on, the only command that is active is the "?". If this command is issued the

M200AH will respond with MUST LOG ON.

5. The following messages will be given at logon.

LOG ON SUCCESSFUL

LOG ON FAILED

LOG OFF SUCCESSFUL

Correct password given Password not given or incorrect Logged off

The RS-232 LOGON feature must be enabled from the front panel by setting bit 4 from Table 5-9. Once the feature is enabled, to logon type:

LOGON 940331

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940331 is the default password. The password can be changed to any number from 0 to 999999 by the variable RS232_PASS. To change the password enter the command

V RS232_PASS=940331

which sets the password to the factory default. Protocol of Port Communication The RS-232 interface has two protocols of communication, because if the port is attached to a

computer it needs to have different characteristics than if used interactively. Consequently, there are two primary styles of operation: terminal mode and computer mode.

When an operator is communicating with the analyzer via a terminal, the analyzer should be placed into TERMINAL MODE, which echoes keystrokes, allows editing of the command line using the backspace and escape keys, and allows recall of the previous command. When a host computer or data logger is connected to the analyzer, it should be placed into COMPUTER MODE, which does not echo characters received or allow the special editing keys. See Table 5-10 for relevant commands.

Table 5-10: RS-232 Switching From Terminal Mode to Computer Mode

Key Function

Control-T (ASCII 20 decimal) Switch to terminal mode (echo, edit) Control-C (ASCII 3 decimal) Switch to computer mode (no echo, no edit)

If the command line doesn't seem to respond to keystrokes or commands, one of the first things you should do is send a Control-T to switch the command line interface into terminal mode. Also, some communication programs remove CTRL-T and CTRL-C characters from the byte stream, therefore these characters will not be sent to the analyzer. Check your communications program owners manual.

Entering Commands in Terminal Mode

In terminal mode, all commands must be terminated by a carriage return; commands are not processed until a carriage return is entered. While entering a command you may use the following editing keys:

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Table 5-11: RS-232 Terminal Mode Editing Keys

Key Function

CR (carriage return) Execute command BS (backspace) Backspace one character to the left ESC (escape) Erase entire line Control-R (ASCII 18 decimal) Recall previous command Control-E (ASCII 5 decimal) Recall and execute previous command

NOTE

To open the help screen, Type "?" and press the Enter key.

Commands are not case-sensitive; you should separate all command elements (i.e. keywords, data values, etc.) by spaces.

Words such as T, SET, LIST, etc. are called keywords and are shown on the help screen in uppercase, but they are not case-sensitive. You must type the entire keyword; abbreviations are not accepted.

5.7.2. Command Summary

The information contained in the rest of this section covers all of the normal commands that are required to operate the instrument from a remote terminal. If you are going to be writing computer programs to communicate with the M200AH (i.e. operating the port in COMPUTER MODE) we suggest that you order a supplementary manual "The RS-232 Interface", Teledyne API part number 01350. This manual shows additional features of the port designed to support a computer driven interface program.

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Table 5-12: RS-232 Command Summary

Commands Definition

? Print help screen T SET ALL Enable display of all test variables during T LIST T SET name Display only NAME during T LIST T LIST [ALL] Print all test variables enabled with T SET or ALL warnings T name Print single test, "name" from Table 5-15 T CLEAR ALL Disable T LIST, use with T SET name W SET ALL Enable display of all warnings during W LIST W LIST [ALL] Print warnings enabled with W SET or ALL warnings W name Print individual "name" warning from Table 5-16 W CLEAR ALL Disable W LIST, use with W SET C LIST Print calibration commands C command Execute calibration "command" from Table 5-18 D LIST Prints all I/O signal values D name Prints single I/O signal value/state D name=value Sets variable to new "value" D LIST NAMES Lists diagnostic test names D ENTER name Enters and starts 'name' diagnostic test D EXIT Exits diagnostic mode D SYS_RESET Resets analyzer(same as power-on) D RAM_RESET System reset, plus erases RAM. Initializes DAS, NO, NOx,

conc readings, calib not affected.

D EE_RESET System reset, plus erases EEPROM (RAM_RESET actions +

setup variables, calibration to default values. V LIST Print all variable names V name Print individual "name" variable V name=value Sets variable to new "value" V CONFIG Print analyzer configuration R count Print last "count" DAS averages

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Table 5-13: RS-232 Command Summary

Terminal Mode Editing Keys Definition

V MODE Print current analyzer mode BS Backspace ESC Erase line ^R Recall last command ^E Execute last command CR Execute command ^C Switch to computer mode

Computer Mode Editing Keys Definition

LF Execute command ^T Switch to terminal mode

Security Features Definition

LOGON password Establish connection to analyzer LOGOFF Disconnect from analyzer

General Output Message Format

Reporting of status messages for use as an audit trail is one of the two principal uses for the RS-232 interface. You can effectively disable the asynchronous reporting feature by setting the interface to quiet mode, see Table 5-9. All messages output from the analyzer (including those output in response to a command line request) have the format:

X DDD:HH:MM IIII MESSAGE

X is a character indicating the message type, as shown in Table 5-14. DDD:HH:MM is a time-stamp indicating the day-of-year (DDD) as a number from 1 to 366, the

hour of the day (HH) as a number from 00 to 23, and the minute (MM) as a number from 00 to 59.

IIII is the 4-digit machine ID number. MESSAGE contains warning messages, test measurements, DAS reports, variable values, etc. The uniform nature of the output messages makes it easy for a host computer to parse them.

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Table 5-14: RS-232 Interface Command Types

First Character Message Type

C Calibration status D Diagnostic R DAS report T Test measurement V Variable

W Warning

There are 6 different types of messages output by the M200AH. They are grouped below by type in Table 5-15 – Table 5-19. The meanings of the various messages are discussed elsewhere in the manual. The TEST, DIAGNOSTIC and WARNING messages are discussed in Sections 9.1.1,

9.1.2, 9.1.3. DAS and VARIABLES are discussed in Sections 5.3.3 and 5.3.9. CALIBRATE is discussed in Section 7.

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5.7.3. TEST Commands and Messages

Table 5-15: RS-232 Test Messages

Name Message Description

NOXRANGE NORANGE

(1)

NO2RANGE RANGE

(2)

RANGE=xxxxx ppm

(1)

NOX RNG=xxxxx ppm NO RNG=xxxxx ppm NO2 RNG=xxxxx ppm

STABIL STABIL=xxxx.xx ppm Std. Deviation of last 10 min of conc values FLOW SAMPLE FL=xxx CC/M Sample flow rate OFLOW OZONE FL=xxxx CC/M Ozone flow rate PMT PMT=xxxxxx MV PMT output NORM PMT NORM_PMT=xxxxxxx MV PMT output adjusted for T/P compensation

(3)

Analyzer range

Indep. range for NO Indep. range for NO channel Indep. range for NO

channel

AZERO AZERO=xxxxxx MV AutoZero offset value HVPS HVPS=xxxxx V High voltage power supply DCPS DCPS=xxxxxx MV DC power supply RCTEMP RCELL TEMP=xxx C Reaction cell temperature BOXTEMP BOX TEMP=xxx C Internal box temperature PMTTEMP PMT TEMP=xxx C PMT temperature BLOCKTEMP BLOCK=xxx C Sample flow control block temp CONVTEMP CONV TEMP=xxx C Converter temperature RCPRESS RCEL=xxx.x IN-HG-A Rx Cell Pressure SMPPRESS SAMP=xxx.x IN-HG-A Sample Pressure NOXSLOPE NOXSLOPE=xxxxx NOX Slope Parameter NOXOFFSET NOXOFFS=xxxxx NOX Offset Parameter NOSLOPE NOSLOPE=xxxxxx NO Slope Parameter NOOFFSET NOOFFS=xxxxxx NO Offset Parameter CLKTIME TIME=HH:MM:SS Time of day

(1)

Displayed when independent range is enabled.

(2)

Displayed when single or AutoRange is enabled.

(3)

Depends on which units are currently selected.

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The T command lists TEST messages. Examples of the T command are:

T LIST

T LIST ALL

T CONVTEMP

T LIST NOX

T NOX

Lists test messages currently enabled with T SET Lists all test messages Prints the temperature of the converter Prints NO

concentration message

Prints concentration message

5.7.4. WARNING Commands and Messages

Table 5-16: RS-232 Warning Messages

Name Message Description

WSYSRES SYSTEM RESET Analyzer was reset/powered on WRAMINIT RAM INITIALIZED RAM was erased WSMPFLOW SAMPLE FLOW WARN Sample flow out of spec. WOZONEFLOW OZONE FLOW WARNING Ozone flow out of spec. WRCELLP RCELL PRESS WARNING Rx cell pressure out of spec. WBOXTEMP BOX TEMP WARNING Box temp. out of spec. WRCELLT RCELL TEMP WARNING Reaction cell temp. out of spec. WCONVTMP CONV TEMP WARNING Converter temp. out of spec. WOBLKTMP ORIFICE BLK TEMP WARN Orifice block temp out of spec. WDCPS DC POWER SUPPLY WARN DC Power voltage out of spec. WDYNZERO CANNOT DYN ZERO Dynamic zero cal. out of spec. WDYNSPAN CANNOT DYN SPAN Dynamic span cal. out of spec. WBLKTEMP SAMPLE FLOW ORIFICE

BLOCK TEMP WARNING WOZONEGEN OZONE GEN OFF Ozone generator is off WAUTOZERO AZERO WRN XXX.X MV AutoZero reading out of spec. WADINS A/D NOT INSTALLED A/D board not installed or broken

Temperature out of spec.

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Whenever a warning message is reported on the analyzer display, if the RS-232 interface is in the normal mode(i.e. not in quiet mode) the warning message is also sent to the RS-232 interface. These messages are helpful when trying to track down a problem with the analyzer and for determining whether or not the DAS reports are actually valid. The warning message format is for example:

W 194:11:03 0000 SAMPLE FLOW WARN

The format of a warning command is W command. Examples of warning commands are:

W LIST List all current warnings W CLEAR ALL Clear all current Warnings

Individual warnings may be cleared via the front panel or the command line interface. To clear the sample flow warning shown above the command would be:

W WSMPFLOW

5.7.5. CALIBRATION Commands and Messages

Table 5-17: RS-232 Calibration Messages

Message Description

START ZERO CALIBRATION Beginning zero calibration FINISH ZERO CALIBRATION, NO2=xxxxx ppm START SPAN CALIBRATION Beginning span calibration FINISH SPAN CALIBRATION, NO2=xxxxx ppm START MULTI-POINT CALIBRATION Beginning multi-point calibration FINISH MULTI-POINT CALIBRATION Finished multi-point calibration

(1)

Depends on which units are currently selected.

(1)

Finished zero calibration

Finished span calibration

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Whenever the analyzer starts or finishes a calibration, it issues a status report to the RS-232 interface. If the RS-232 interface is in the normal mode, these reports will be sent. Otherwise, they will be discarded. The format of these messages is:

C DDD:HH:MM IIII CALIBRATION STATUS MESSAGE

An example of an actual sequence of calibration status messages is:

C DDD:HH:MM IIII START MULTI-POINT CALIBRATION

C DDD:HH:MM IIII FINISH MULTI-POINT CALIBRATION

There are several methods of both checking the calibration and calibrating the M200AH, these are discussed in Section 7. C LIST lists the calibration commands available. The C command executes a calibration command, which may be one of the following:

Table 5-18: RS-232 Calibration Commands

Command Description

C LIST List calibration commands C ZERO Enter zero calibration mode C SPAN Enter span calibration mode C COMPUTE ZERO Do a zero calibration C COMPUTE SPAN Do a span calibration C EXITZ Exit zero calibration C EXITS Exit span calibration C EXIT Exit zero or span calibration

5.7.6. DIAGNOSTIC Commands and Messages

When Diagnostic mode is entered from the RS-232 port, the diagnostic mode issues additional status messages to indicate which diagnostic test is currently selected. Examples of Diagnostic mode messages are:

D DDD:HH:MM IIII ZERO VALVE=ON

D DDD:HH:MM IIII ENTER DIAGNOSTIC MODE

D DDD:HH:MM IIII EXIT DIAGNOSTIC MODE

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The following is a summary of the Diagnostic commands.

Table 5-19: RS-232 Diagnostic Command Summary

Command Description

D LIST Prints all I/O signal values. See Table 9-4 for Sig I/O definitions. D NAME=VALUE Examines or sets I/O signal. Must issue D ENTER SIG command

before using this command. D LIST NAMES Prin is command.ts names of all diagnostic tests. D ENTER SIG

D ENTER OT D ENTER ET

D EXIT Must use this command to exit SIG, ET or OT Diagnostic modes. D SYS_RESET Resets analyzer software (same as power on). D RAM_RESET Resets analyzer software and erases RAM. Erases NO, NOX, NO2 conc

D EE_RESET Resets analyzer software and erases RAM and EEPROM. Returns all

Executes SIGNAL I/O diagnostic test.

Executes Optic Test diagnostic test.

Executes Elect Test diagnostic test.

Use D EXIT to leave these diagnostic modes.

values, erases all DAS data. Keeps setup variables and calibration.

(Same as installing new software version.)

setup variables to factory defaults, resets calibration values.

5.7.7. DAS Commands and Messages

The M200AH contains a flexible and powerful built in data acquisition system (DAS) that enables the analyzer to store concentration data as well as diagnostic parameters in its battery backed memory. This information can be printed out through the RS-232 port. The diagnostic data can be used for performing “Predictive Diagnostics” and trending to determine when maintenance and servicing will be required.

To print out the properties of all of the data channels enter:

D PRINT

To print the properties of just a single data channel enter:

D PRINT "name”

For example to print the properties of the CONC data channel enter:

D PRINT “CONC”

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To print records from a DAS data channel enter:

D REPORT “name” RECORDS=nnn COMPACT|VERBOSE

Examples of reports are:

D REPORT “CONC” RECORDS=35 VERBOSE

D REPORT “CALDAT” RECORDS=10

D REPORT “PNUMTC” RECORDS=155 VERBOSE

Automatic RS-232 reporting can be independently enabled and disabled for each Data Channel. For all default data channels, automatic reporting is initially set to “OFF.” If this property is turned on, the Data Channel will issue a report with a time and date stamp to the RS-232 port every time a data point is logged. The report format is shown below:

D 94:08:00 0200 CONC : AVG NXCNC1 = 1234.5 PPB

D 94:08:00 0200 CONC : AVG NOCNC1 = 1234.5 PPB

D 94:08:00 0200 CONC : AVG N2CNC1 = 1234.5 PPB

One CONC report consists of:

D = Type of report (Diagnostic) 94:08:00 = Time and Date stamp (Julian day, Hr, Min) 0200 = Instrument ID number CONC = Data Channel name CONC = concentration data PNUMTC = pneumatic parameters CALDAT = calibration parameters AVG = Type of data AVG = average reading INST = instantaneous reading NXCNC1 = 1234.5 PPB = Name of the parameter NX = NOX NO = NO N2 = NO2

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All of the default Data Channels sample more than one parameter, for these channels, each parameter is printed on a separate line.

There is also a compact format. If this attribute is enabled, all 3 concentration parameters are printed on one line as shown below:

D 94:08:00 0200 CONC : 120.0 100.0 20.0

The parameters are in the order of NOX, NO, and NO2. To change any of the attributes of a particular data channel, the channel attributes are edited

from the front panel. The following table uses the example of Automatic Reporting. Other attributes can be edited in a similar fashion.

5.7.8. VARIABLES Commands and Messages

The M200AH operational modes are listed above. To list the analyzer's current mode type: V MODE Lists M200AH current operational mode See Table 5-7 for list of operational modes and meanings. Model M200AH Internal variables The M200AH has a number of internal setup variables. Essentially all of these are set at time of

manufacture and should not need to be changed in the field. A list of user accessible variables is shown in Table 9-5.

A list of variables and their settings can be requested over the RS-232 port by: V LIST Lists internal variables and values The output from this command is quite long and will not be shown here. The general format of

the output is:

name = value warning_lo warning_hi <data_lo> <data_hi>

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Where:

name = name of the variable value = current value of variable warning_lo = lower limit warning (displayed if applicable) warning_hi = upper limit warning (displayed if applicable) data_lo = lower limit of allowable values data_hi = upper limit of allowable values

Variables can be changed. Before changing the settings on any variables, please make sure you understand the consequences of the change. We recommend you call the factory before changing the settings on any variables. The general format for changing the settings on a variable is:

V LIST name[=value [warn_lo [warn_hi]]]

For example to change the warning limits on the box temperature type:

V BOX_SET 30 10 50

and the CPU should respond with:

V DDD:HH:MM IIII BOX_SET=30 10 50(0-60)

The CONFIG command lists the software configuration. For example: V CONFIG list software configuration The format of this listing is shown in the example below.

CONFIG[0] = Revision H.7 CONFIG[1] = NO

Analyzer

CONFIG[2] = SBC40 CPU

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

6. OPTIONAL HARDWARE AND SOFTWARE

Optional equipment offered with the M200AH includes:

1. Rack mount with slides

2. Rack mount without slides, ears only

3. Rack mount for external pump

4. Stainless Steel zero/span valves*

5. Oxygen Sensor*

6. 4-20mA, isolated outputs

7. Molybdenum Converter

8. Model 501 External Stainless Steel/Molybdenum Converter

9. External Desiccant Canister

10. Alternate Bypass Flow Orifice - 500 cc/min

*Note: Zero/Span Valves and an Oxygen Sensor cannot be installed in the same instrument.

6.1. Rack Mount Options

Rack Mount including slides and ears, permits the Analyzer to be mounted in a standard 19" wide x 24" deep RETMA rack. This permits convenient slide out operation for servicing. It can also be ordered without slides for applications requiring the instrument to be rigidly mounted in a RETMA rack.

The external pump can be ordered in the following configurations:

1. External pump pack - this configuration comes standard with the M200AH.

2. Pump Pack with rack mount - fixed tray.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

6.2. Zero/Span Valves Option

The Zero/Span Valve option consists of a manifold of stainless steel valves plus drive electronics connected to the CPU. The Option consists of two variations. Option 50 has 2 - 2-way valves, 1 3-way valve and operates in 3 modes:

1. Sample mode, all 3 valves off, sample gas flows through the sample port to the instrument.

2. Zero mode, sample-cal valve is energized to shut off sample flow, zero valve is energized to

input zero gas.

3. Span mode, sample-cal valve is energized to shut off sample flow, span valve is energized to

input low concentration range span gas.

Option 52 consists of all of the features in Option 50 plus a second span valve to allow a low and high concentration of span gas.

See

Figure 2-6 for valve location. Fittings on the rear panel are for two concentrations of span gas plus zero gas. (See Figure 2-2 and Figure 2-4) The valves are can be operated by several methods shown in Table 6-1.

Note: The Zero/Span Valves option cannot be included in an instrument that also includes an Oxygen Sensor.

Table 6-1: Zero/Span Valve Operation

Mode Description Reference Section

1. Front panel operation via CALS and CALZ buttons

2. Automatic operation using AUTOCAL

3. Remote operation using the RS-232 interface

4. Remote operation using external contact closures

Calibration Section 7 - Manual Zero/Span Check

Setup and use of AUTOCAL is described in Table 6-2 and Section 7.2

Setup described in Section 6.2 Operation of AUTOCAL described in Section 7.2

Section 7.5 - Automatic operation using external contact closures. Table 7-12 and Section 9.3.4.3

Zero and span gas inlets should supply their respective gases in excess of the demand of the Analyzer. Supply and vent lines should be of sufficient length and diameter to prevent back diffusion and pressure effects. See Figure 2-4 for fitting location and tubing recommendations.

Note that Zero/Span Valves cannot be included in an instrument that also includes the Oxygen sensor option.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

6.2.1. Autocal - Setup Zero/Span Valves

The Zero/Span valves can be set up to operate automatically. Table 6-2 in this section describes Autocal setup.

Table 6-2: Setup Automatic Zero/Span Checking or Calibration

Step Action Comment

1. Press SETUP-ACAL This button sequence will cause the AUTOCAL menu to be displayed.

2. Press PREV or NEXT

3. Select MODE, then PREV or NEXT

4. Press SET This menu sets up several timers and selects calibration or calibration

This selects a SEQUENCE. Up to 3 Sequences can be defined. A Sequence is a definition of zero/span calibrations along with timing information.

MODE allows you to select the order of zero, low-span or high-span that will be performed, MODES are listed in Table 6-3. Use PREV NEXT to scroll the list of choices, then press ENTR to select. To disable a sequence, select DISABLE from the menu.

check.

1. TIMER ENABLE – If set to ON, the defined sequence will

execute. If set to OFF, the sequence will remain in memory, but will not execute.

2. START DATE - calendar date to start sequence dd-mmm-yy, day-

month-year format.

3. START TIME - time of day sequence will start. hh-mm, hours-

minutes in 24 hr format.

4. DELTA DAYS and DELTA HOURS:MIN is the time between

each activation of the sequence. By setting the Delta Hours variable to be other than an exact number of days, the sequence can move ahead or be delayed each time it is run. For example, by setting DELTA DAYS = 1 and DELTA HOURS = 1:00, the sequence will execute 1 hour later each day. To set it to move back ½ hour each day, DELTA DAYS = 0, DELTA HOURS = 23:30.

5. DURATION -Amount of time for each zero/span point.

6. CALIBRATE – If set to ON, will calibrate(adjust slope and

offset). If OFF will check, but not change calibration.

7. 7. RANGE-TO-CAL Selects the range to calibrate LO or HI.

Applicable to AutoRange and RemoteRange modes.

5. Press EXIT The M200AH now exits the AUTOCAL SETUP menu. For each

enabled sequence, the M200AH will now AUTOCAL at the defined times.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 6-3: Action of MODE Field in AutoCal

MODE CALIBRATE = ON CALIBRATE = OFF

ZERO Zero calibrates LO or HI (depending

on RANGE-TO-CAL), SINGLE or IND ranges.

ZERO-LO Zero and low span calibrates LO,

SINGLE or IND ranges.

ZERO-HI Zero cals & span cals HI, SINGLE or

IND range with HI span gas.

ZERO-LO-HI Zero cals, span cals LO and HI range.

LO span gas for LO range, HI span gas for HI range.

Zero cals & span cals in SINGLE or IND range using HI span gas. LO span is cal check only.

LO-HI Span cals LO range with LO span gas,

Span cals HI range with HI span gas in AutoRange mode. Span cals SINGLE or IND range with HI span gas. LO span is cal check only.

LO Span cals LO range with LO span gas.

Span cals SINGLE or IND range with LO span gas.

Zero checks LO or HI (depending on RANGE-TO-CAL), SINGLE or IND range.

Zero and low span checks LO, SINGLE or IND ranges.

Zero checks & span checks on HI, SINGLE or IND range with HI span gas.

Zero checks, span checks both ranges. LO span gas for LO range, HI span gas for HI range. Does 3 point check in SINGLE or IND range modes.

Span checks LO range with LO span gas, Span checks HI range with HI span gas. Does 2 point check in SINGLE or IND range mode.

Span checks LO range with LO span gas. Span checks SINGLE or IND range with LO span gas.

HI Span cals on HI range with HI span

gas. Span cals SINGLE or IND range with HI span gas.

6.3. Oxygen Sensor Option

The Model 200AH can be equipped with an optional paramagnetic oxygen sensor that is capable of measuring full scale ranges from 5% to 100%. The option consists of the paramagnetic sensor module, an interface electronics board, a flow control orifice that generates a flow of about 80 cc/min through the sensor, and a temperature controlled oven that maintains the sensor and flow control orifice at 50C.

Note that an Oxygen Sensor cannot be included in an instrument that also includes the Zero/Span Valves option.

Span checks on HI range with HI span gas. Span checks SINGLE or IND range with HI span gas.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

6.4. Isolated 4-20 mA Current Loop Option

The M200AH comes equipped with 4-20mA current loop. The electrical ground of this output is part of the instrument ground. In certain applications the instrument ground must be isolated from the external ground. For applications requiring electrical isolation, we offer optional isolated current loop outputs. With the exception of electrical isolation, the setup and usage is identical to the standard equipment current loop output. The calibration procedure is located in the Troubleshooting Section 9.

6.5. Molybdenum Converter Option

The Molybdenum Converter is used in applications where the NO2 concentration will not be expected to exceed 5 ppm. In these applications it exhibits very high conversion efficiencies, thus enabling the accurate measurement of low concentrations of NO2. Operating the Converter where the concentrations exceed 5 ppm will cause lower efficiencies and will shorten the life of the converter.

6.6. External Desiccant Canister Option

This Option is located between the PermaPure Dryer and the ozone flowmeter. See Figure 2-2 for location and Figure 8-5 for pneumatic schematic. It is mounted external to the analyzer. It should be used at extremely humid sites, or where the -70°C dewpoint air produced helps in reducing reaction cell contamination and window clouding.

6.7. Alternate Bypass Flow Orifice Option

The standard bypass flow is 250 cc/min. For those applications requiring a higher sample flow, this option provides a 500 cc/min bypass flow. The overall sample flow is 550 cc/min with this option installed. The orifice is located in the vacuum manifold at the rear of the instrument see

Figure 2-6.

6.8. M501 External Converter Option

The M200AH can be ordered with a Model 501 Thermal Converter. Its conversion performance is very similar to the Mini HiCon. The advantage of this converter is that it is less prone to plugging because it is constructed of larger diameter tubing, also the conversion efficiency is very high because the thermal converter is followed by a molybdenum converter. Since the converter is external to the M200AH the response of the instrument is considerably slower if operated in the NO/NOX switching mode. This is due to the larger internal volume that must be purged during the NO/NO being operated in the NO

measurement cycle. This effect is less noticeable if the M200AH is

only mode.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

The M501 contains 2 converters, a high temperature stainless steel and a molybdenum converter. While this combination produces very high conversion efficiencies, the life of the moly must be considered. If high levels of NO2 are expected in the sample stream, the high temperature converter converts only about 90 % of the total NO2, the moly must convert the rest. Since the moly operates by reacting the molybdenum metal with the NO high levels (>50 ppm) of NO

are present.

, its lifetime can be quite short if

In instruments that have the external converter option, the Mini HiCon housing assembly contains only the catalytic ozone killer and a heater to keep the ozone catalyst temperature at 200°C. Its temperature is monitored in the TEST function O3KL.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

7. CALIBRATION AND ZERO/SPAN CHECKS

There are several ways to check and adjust the calibration of the M200AH. These different methods are summarized in the following Table 7-1. In addition, all of the methods described in this section can be initiated and controlled via the RS-232 port, see Section 5.7 for details.

We strongly recommend that NOX SPAN CALIBRATION be done with NO span gas. Since NO is unaffected by the converter, both channels can be accurately calibrated. It is also important that there be some oxygen in the span gas. Inaccurate calibration of the NOX channel can result from calibration gasses containing no oxygen. All calibration gasses must have a dew point of < 20C.

NOTE

The quality of calibration can be no better than the accuracy and

quality of the calibration gasses used. See Section 7.10 Calibration

Quality for recommendations on calibration gasses and Section 9.2.10.

NOTE

If there are any problems completing any of the following procedures,

refer to Section 9.2.8 and 9.2.9- Unable to Span or Zero.

Before Calibration

1. Use the SETUP-RNGE menu to set the range the instrument will be operated in.

2. If you are using any of the following features, they must be set up before calibration: A. Autoranging or Remote Ranging - See Section 7.8 B. Independent Ranges - See Section 7.9 C. NO only or NOX only mode, Section 7.6 and 7.7

Normal calibration assumes that these features are already set up.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 7-1: Types of Zero/Span Check and Calibration

Section Type of Cal or Check Description

7.1 Manual Z/S Check or Calibration with span gas in the sample port

7.2 Manual Z/S Check or Calibration with Z/S Valve Option

7.4 Dynamic Z/S Calibration with Z/S Valves Option

7.5 Use of Z/S Valves with Remote Contact Closure

7.6 NO Only Mode Calibration Covers requirements if calibrating in NO only mode.

7.7 NOx Only Mode Calibration Covers requirements if calibrating in NOx only mode.

7.8 Calibration Requirements for AutoRange or Remote range

7.9 Calibration Requirements for Independent Ranges

7.10 Calibration Quality Information on how to determine if the calibration

This calibration method uses calibration gas coming in through the sample port. Zero/Span valves do not operate.

How to operate Zero/Span Valves Option. Can be used to check or adjust calibration.

Operates Z/S valves periodically and adjusts calibration.

Operates Z/S valves with rear panel contact closures. Without valves, can be used to switch instrument into zero or span cal mode. Used for either checking or adjusting zero/span.

Covers special requirements if using AutoRange or Remote Range control.

Covers special requirements if using Independent Range.

performed will result in optimum instrument performance.

7.11 Converter Efficiency Compensation

Covers methods to automatically compensate for converter efficiency.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

7.1. Manual NO

Zero/Span Check or Cal With Zero/Span

Gas in the Sample Port

The calibration of the instrument can be checked or adjusted using gas coming in the sample port. This method is often used when the calibration gas is supplied from the stack sample probe or external tank and valve system. This is the calibration method to use if the instrument is purchased without the Zero/Span Valve.

Table 7-2 details the zero calibration procedure with zero gas coming in through the sample port.

Table 7-2: Manual Zero Calibration Procedure - Zero Gas Thru Sample Port

Step Number Action Comment

1. Check “Before Calibration”

2. Press CAL The M200AH enters the calibrate mode from sample mode.

3. Select LO or HI Range

Check “Before Calibration” Section 7 above before proceeding.

The zero gas must come in through the sample port. If AutoRange is enabled you will be prompted for which

range to calibrate. Select the LO or Hi range, then press ENTR.

4. Wait 10 min Wait for reading to stabilize at zero value.

5. Press ZERO If you change your mind after pressing ZERO, you can still

press EXIT here without zeroing the instrument.

6. Press ENTR Pressing ENTR actually changes the calculation equations.

7. Press EXIT M200AH returns to sampling. Immediately after calibration,

data is not added to the DAS averages.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Enter the expected NOx and NO span gas concentrations:

Table 7-3: Enter Expected Span Gas Concentrations Procedure

Step Number Action Comment

1. Check “Before Calibration”

2. Press CAL-CONCNOX

3. Press ENTR Pressing ENTR stores the NO span value and returns the

4. Press CAL-CONC-NO

5. Press ENTR Pressing ENTR stores the NO span value and returns the

6. Press EXIT Returns instrument to SAMPLE mode.

Check “Before Calibration” Section 7 before proceeding.

This key sequence causes the M200AH to prompt for the expected NO

Enter the NO under each digit until the expected value is set. This menu can also be entered from CALS or CALZ.

prompt to the CONC menu.

This key sequence causes the M200AH to prompt for the expected NO concentration.

Enter the NO span concentration value by pressing the key under each digit until the expected value is set. This menu can also be entered from CALS or CALZ

prompt to the CONC menu.

concentration.

span concentration value by pressing the key

If desired, compensation for converter efficiency (CE) can be included in the NOx and NO2 concentration calculation. The CE must be entered prior to calibration. Refer to Section 7.10 for the CE procedure.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 7-4: Manual Span Calibration Procedure - Span Gas Thru Sample Port

Step Number Action Comment

1. Press CAL-CONC-NO

2. Press ENTR Pressing ENTR stores the NO span value and returns the

3. Press CAL The M200AH enters the calibrate mode. NO span gas should

4. Select LOW or HIGH

5. Wait 10 min Wait for reading to stabilize at span value.

6. Press SPAN If you change your mind after pressing SPAN, you can still

7. Press ENTR Pressing ENTR actually changes the calculation equations

8. Press EXIT M200AH returns to sampling. Immediately after calibration,

This key sequence causes the M200AH to prompt for the expected NO concentration.

Enter the NO span concentration value by pressing the key under each digit until the expected value is set. This menu can also be entered from CALS or CALZ.

prompt to the CONC menu.

be fed to the sample port. If AutoRange is selected, it is necessary to select which range

to calibrate. This prompt will not be displayed unless Autorange or Remote range is selected.

press EXIT here without spanning the instrument.

and causes the instrument to read the expected NO and NO span concentrations.

data is not added to the DAS averages.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

7.2. Manual O

Zero/Span Check or Cal With Zero/Span

Gas in the Sample Port

The calibration of the O2 Sensor can be checked or adjusted using gas coming in the sample port. This method is often used when the calibration gas is supplied from the stack sample probe or external tank and valve system.

Table 7-5 details the zero calibration procedure with zero gas coming in through the sample port.

Table 7-5: Manual O2 Zero Calibration Procedure - Zero Gas Thru Sample Port

Step Number Action Comment

1. Check “Before Calibration”

2. Press CAL-O2-ENTR

4. Wait 10 min Wait for reading to stabilize at zero value.

5. Press ZERO If you change your mind after pressing ZERO, you can still

Check “Before Calibration” Section 7 above before proceeding.

The M200AH enters the calibrate mode for O2. The zero gas must come in through the sample port.

press EXIT here without zeroing the instrument.

6. Press ENTR Pressing ENTR actually changes the calculation equations.

7. Press EXIT M200AH returns to sampling. Immediately after calibration,

data is not added to the DAS averages.

Table 7-6 details the span calibration procedure with span gas coming in through the sample port.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 7-6: Manual O2 Span Calibration Procedure - Span Gas Thru Sample Port

Step Number Action Comment

1. Press CAL-O2-CONC

2. Press ENTR Pressing ENTR stores the O2 span value and returns the

3. Wait 10 min Wait for reading to stabilize at span value.

4. Press SPAN If you change your mind after pressing SPAN, you can still

5. Press ENTR Pressing ENTR actually changes the calculation equations

6. Press EXIT M200AH returns to sampling. Immediately after calibration,

This key sequence causes the M200AH to prompt for the expected O

Enter the O under each digit until the expected value is set.

prompt to the CAL menu.

press EXIT here without spanning the instrument.

and causes the instrument to read the expected O concentration.

data is not added to the DAS averages.

concentration.

span concentration value by pressing the key

span

7.3. Manual Zero/Span Check with Zero/Span Valves

Option

The Zero/Span valve option can be operated from the front panel keyboard as described below. The Zero/Span valves allow zero and span gas come in through ports on the rear panel of the instrument. The Zero/Span valves can be set up to operate automatically on a periodic schedule. See Section 6.2 to setup automatic zero/span feature.

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Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

Table 7-7: Manual Zero Check Procedure - Z/S Valves

Step Number Action Comment

1. Check “Before Calibration”

2. Press CALZ The analyzer enters the zero calibrate mode. This switches the

3. Select LO or HI range

4. Wait 10 min Wait for reading to stabilize at zero value.

5. Press ZERO If you change your mind after pressing ZERO, you can still

6. Press ENTR Pressing ENTR actually changes the calculation equations,

7. Press EXIT M200AH returns to sample mode. Immediately after

Check “Before Calibration” Section 7 before proceeding.

sample/cal and zero valve to allow zero gas to come in through the zero gas inlet port in the rear panel.

If AutoRange is enabled you will be prompted for which range to calibrate. Select the LO or HI range, then press ENTR.

press EXIT here without zeroing the instrument.

forcing the reading to zero.

calibration, readings do not go into the DAS averages.

Refer to Table 7-3 to enter expected NO and NOx values.

7-8

Teledyne 200AH User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY MESSAGES

LIST OF TABLES

1. HOW TO USE THIS MANUAL

2. GETTING STARTED

2.1. Unpacking

2.2. Electrical and Pneumatic Connections

2.3. Initial Operation

3. SPECIFICATIONS, WARRANTY

3.1. Specifications

3.2. Warranty

4. THE M200AH NOX ANALYZER

4.1. Principle of Operation

4.1.1. NOX Measurement

4.1.2. Oxygen Measurement (Option)

4.2. Operation Summary

4.2.1. NOX Sensor Module, Reaction Cell, Detector

4.2.2. Oxygen Sensor Module (Option)

4.2.3. Pneumatic Sensor Board

4.2.4. Computer Hardware and Software

4.2.5. V/F Board

4.2.6. Front Panel

4.2.6.1. Keyboard

4.2.6.2. Status LED's

4.2.6.3. Power Switch

4.2.7. Power Supply Module

4.2.8. Pump, Valves, Pneumatic System

4.2.9. Ozone Generator

4.2.10. NO2 - NO Converter

5. SOFTWARE FEATURES

5.1. Index to Front Panel Menus

5.1.1. Sample Menu

5.1.2. Set-Up Menu

5.2. Sample Mode

5.2.1. Test Functions

5.2.2. CAL, CALS, CALZ, Calibration Functions

5.2.2.1. CAL, CALS, CALZ

5.2.2.2. Gas To Cal

5.2.2.3. Zero

5.2.2.4. Span

5.2.2.5. NO, NOX and O2 Cal Concentration

5.2.2.6. Formula Values

5.2.2.7. Automatic Converter Efficiency Compensation

5.3. Set-Up Mode

5.3.1. Configuration Information (CFG)

5.3.2. Automatic Calibration (AutoCal)

5.3.3. Data Acquisition System (DAS)

5.3.3.1. Data Channels

5.3.4. Range Menu

5.3.4.4. O2 Range

5.3.4.5. Dilution Ratio

5.3.4.6. Concentration Units

5.3.4.7. Recorder Offset

5.3.5. Password Enable

5.3.6. Time of Day Clock

5.3.7. Diagnostic Mode

5.3.8. Communications Menu

5.3.9. Variables Menu (VARS)

5.4. M200AH Operating Modes

5.4.1. NO/NOx/NO2 Switching Mode

5.4.2. NOX Only Mode

5.4.3. NO Only Mode

5.5. 4-20 mA Current Loop

5.6. Status Output

5.7. RS-232 Interface

5.7.1. Setting up the RS-232 Interface

5.7.2. Command Summary

5.7.3. TEST Commands and Messages

5.7.4. WARNING Commands and Messages

5.7.5. CALIBRATION Commands and Messages

5.7.6. DIAGNOSTIC Commands and Messages

5.7.7. DAS Commands and Messages

5.7.8. VARIABLES Commands and Messages

6. OPTIONAL HARDWARE AND SOFTWARE

6.1. Rack Mount Options

6.2. Zero/Span Valves Option

6.2.1. Autocal - Setup Zero/Span Valves