Teledyne M201E User Manual

MANUAL ADDENDUM

MODEL M201E

AMMONIA ANALYZER

(For use with the M200E Operators Manual, P/N 04410)

TELEDYNE ADVANCED POLLUTION INSTRUMENTATION

(TELEDYNE-API)

9480 CARROLL PARK DRIVE

SAN DIEGO, CA 92121-5201

TOLL-FREE: 800-324-5190
FAX: [phone]
TEL: [phone]
E-MAIL: [e-mail]
WEB SITE: www.teledyne-api.com

Copyright 2006-2012 05206H DCN5910
Teledyne Advanced Pollution Instrumentation

07 May 2012

ABOUT THIS MANUAL

This manual is an addendum that supplements the M200E NOx Analyzer manual, p/n 04410; it
includes document(s) as listed below.

Part No. Name/Description

M201E Spare Parts List (in Section 6.0)

06185H

Note: Please refer to our Website or Sales for more
recent updates.

NOTE

We recommend that this manual and the M200E manual be read in their

entirety before any attempt is made to operate the instrument.

REVISION HISTORY

M201E, MANUAL ADDENDUM, PN 05206

Date

07 May 2012 H 5910 Updated specs and valve port labels
14 May 2010 G 5731 Administrative additions

17 Nov 2009 F 5588

To Rev DCN Change Summary

 Added thermoco uple replacement

instructions

 Updated catalytic cartridge illustration
 Updated pneumatic diagrams

 Updated Spare Parts List Rev E to F

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Teledyne API Model M201E NH3 Analyzer Operator Manual M201E Ammonia Analyzer

SAFETY MESSAGES

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

A safety message alerts you to potential hazards that could hurt you or others. Safety messages
are associated with a safety alert symbol. These symbols are found in both the M200E and
M201E manuals and are also located 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

WARNING: 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.

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iv 05206H DCN5910

TABLE OF CONTENTS

1.0 M201E AMMONIA ANALYZER .............................................................7

1.1 Theory of Operation...................................................................................................... 10

1.1.1 Minim

1.1.2 Purging the Reaction Cell..................................................................................... 12

1.2

1.3 Sa

1.4 M201E Analyzer Specifications................................................................................... 14

Special Considerations For Ammonia Measurement ................................................... 12

mple Filtration........................................................................................................... 13

2.0 CALIBRATION PROCEDURE .............................................................15

2.1 Zeroing The Analyzer................................................................................................... 16

2.2 Spanning The Analyzer With Nitric Oxide Gas........................................................... 17

2.3 Spanning The Analyzer With Ammonia Gas ............................................................... 20

3.0 CONFIGURABLE ANALOG OUTPUT OVERVIEW ...........................25

3.1 Analog Output - Electronic Configuration ................................................................... 27

3.2 Analog Output Signal Type and Range Selection ........................................................ 28

3.3 Selecting Auto Or Manual Analog Output Calibration ................................................29

3.4 Manually Calibrating Analog Output Signal Levels .................................................... 32

3.5 Analog Output Recorder Offset Adjustment ................................................................34

4.0 MAINTENANCE SCHEDULE...............................................................35

4.1 M501 NH3, Maintenance ............................................................................................. 35

4.2 Replacing the Catalytic Cartridge................................................................................. 36

4.3 Replacing the Thermocouple........................................................................................ 37

4.4 AutoZero Flow Check................................................................................................... 39

5.0 ALARMS AND CAUTIONS ..................................................................41

5.1 Alarm ............................................................................................................................ 41

5.2 Caution.......................................................................................................................... 41

6.0 M201E SPARE PARTS LIST ...............................................................43

7.0 CALCULATING MOLY CONVERTER EFFICIENCIES ......................47

7.1 Purpose:......................................................................................................................... 47

7.2 TOOLS:......................................................................................................................... 47

7.3 PARTS:......................................................................................................................... 47

7.4 PROCEDURE............................................................................................................... 47

izing PMT Drift.......................................................................................... 11

LIST OF FIGURES

Figure 1-1. M201E Pneumatic Connection Diagram with External Calibrator Option (ECO)...... 8

Figure 1-2. M201E and M501 NH

Figure 1-3. M201E and M501 NH3, with Zero and Span Valve Options Pneumatic Flow.......... 10

Figure 3-1. Analog Output Connector.......................................................................................... 25

Figure 3-2. Analog Output Signal T

Figure 3-3. Auto Or Manual Analog Output Calibration ............................................................. 30

Figure 3-4. Analog Output Group Calibration
Figure 3-5. Setup For Calibrating Analog Output Signal Levels

05206H DCN5910 v

, Pneumatic Flow.................................................................... 9

3

ype ....................................................................................... 28

.............................................................................. 31

................................................. 32

Figure 3-6. Analog Output Manual Calibration............................................................................ 33

Figure 3-7. Analog Output Recorder Offset Calibration.............................................................. 34

Figure 4-1. Catalytic Cartridge..................................................................................................... 36

Figure 4-2. Thermocouple Location............................................................................................. 37

Figure 5-1. M201E Functional Block Diagram

............................................................................ 42

LIST OF TABLES

Table 1-1. M201E Operating Specifications ................................................................................ 14

Table 2-1. Zero Calibration Procedure – Zero Gas Through the SAMPLE Port ......................... 16

Table 2-2. Zero Calibration Procedure - Zero Gas Through ZERO Port .....................................17

Table 2-3. NO Calibration Procedure – NO Gas Through the SAMPLE Port............................. 18

Table 2-4. NO Calibration Procedure - NO Gas through the SPAN Port.................................... 19

Table 2-5. Confirming Ammonia Converter Efficiency............................................................... 21

Table 2-6. NH3 Calibration Procedure – NH3 Gas Through The SAMPLE Port........................ 22

Table 2-7. NH3 Calibration Procedure – NH3 Gas through the SPAN Port................................ 23

Table 3-1. Analog Output Data Default Settings.......................................................................... 25

Table 3-2. Analog Output Pin-Outs.............................................................................................. 26

Table 3-3. Analog Output Voltage Range Min/Max.................................................................... 27

Table 3-4. Analog Output Current Loop Min/Max ...................................................................... 27

Table 3-5. ZERO/SPAN Analog Output Signal Calibration Tolerances...................................... 32

Table 4-1. Preventative Maintenance Schedule............................................................................ 35

Table 4-2. M501 NH3, Converter Rebuild Parts List.................................................................... 36

Table 4-3. Analyzer Flow Check.................................................................................................. 39

vi 05206H DCN5910

1.0 M201E AMMONIA ANALYZER

This manual is to be used in conjunction with the M200E NOx Analyzer
manual, p/n 04410 supplied with this instrument. It is important that you
familiarize yourself with the workings of the NOx analyzer before proceeding
with NH3 measurements.

The M201E ammonia analyzer consists of a modified M200E nitrogen oxide
analyzer and an M501 NH3, ammonia converter. The analyzer measures the
following individual gas concentrations: TNx (NH
and NO in the sample gas.

and NOx), NOx (NO and NO2)

3

 The

ammonia concentration is calculated by subtracting the NOX

reading from the TNx measurement.

 The

nitrogen dioxide concentration is calculated by subtracting the NO

reading from the NOx measurement.

The instrument is available in three pneumatic configurations:

 The M201E with External Calibrator Option (ECO) is shown in Figure

1-1.

 The basic system is shown in Figure 1-2.
 The M201E with Zero/Span valves is shown in Figure 1-3.

Note: For an M201E analyzer with Zero/Span option you must connect the
umbilical cord P/N 02255 between the analyzer and the external M501 NH3,
converter assembly.

If the analyzer is purchased without the Zero/Span option t hen the zero and span
calibration gases must be individually applied to the sample port. Remember, the
gases must be clean/dry and supplied at ambient pressure.

CAUTION

Do not pressurize the Sample/Span/Zero port above ambient

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M201E Ammonia Analyzer Teledyne API Model M201E NH3 Analyzer Operator Manual

Figure 1-1. M201E Pneumatic Connection Diagram with External Calibrator Option (ECO)

8 05206H DCN5910

Teledyne API Model M201E NH3 Analyzer Operator Manual M201E Ammonia Analyzer

Figure 1-2. M201E and M501 NH3, Pneumatic Flow

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M201E Ammonia Analyzer Teledyne API Model M201E NH3 Analyzer Operator Manual

Figure 1-3. M201E and M501 NH3, with Zero and Span Valve Options Pneumatic Flow

1.1 THEORY OF OPERATION

The Teledyne-API Model M201E analyzer measures ammonia by oxidizing it to
nitric oxide by the following reaction:

+ 5O2  4NO + 6H2O

4NH

3

The resulting nitric oxide is then measured by the chemiluminescent reaction with
ozone. Consult Section 10.1 in the M200E manual (provided with this
instrument) for more details on the nitric oxide measurement.

The analyzer uses two converters to oxidize the different sample gases. A high
temperature catalytic converter, the M501 NH3,, converts NH3 and NOx into NO
creating the TN
analyzer and consisting of heated molybdenum, converts all of the NOx in the
sample to NO producing the NOx channel. The nitric oxide channel is measured
while bypassing both the M501 NH
operated in reflux mode, is installed prior to the molybdenum converter and the
AutoZero valve. The drier removes ammonia and water from the switched
stream. The ammonia would have otherwise been converted by the molybdenum

channel. A second converter, housed inside the M201E

x

, and molybdenum converter. A Nafion® drier

3

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Teledyne API Model M201E NH3 Analyzer Operator Manual M201E Ammonia Analyzer

and registered as NOx. This location provides the drier with continuous flow,
thereby allowing it to stabilize faster.

Note: Due to the Nafion® drier, the analyzer has a maximum am monia range of

2.0 PPM.

The calculated gas concentrations, ammonia and nitrogen dioxide, are computed
from the differences between the measured channels, as outlined in the following
equations:

NO (Nitric Oxide) Concentration = Measured
TNx (Total Nitrogen) Concentration = Measured (NH3 + N02 + NO)
NOx (Total Nitrogen – Ammonia) Concentration = Measured (NO2 + NO)
NH3 (Ammonia) Concentration = Calculated as follows:

[(TNx - NOx) / (NH3_CE_FACTOR1)]

NO2 (Nitrogen Dioxide) Concentration = Calculated as follows:

[(NOx – NO) / (NO2_CE_FACTOR1)]

Note: The nitrogen dioxide efficiency factor (NO2_CE_FACTOR1) must be
calculated by conducting a GPT (gas phase titration) as described in Section

8.3.3 of the M200E manual and Section 7.0 of this manual. This value gives a
good indication of how well the molybdenum is converting nitrogen dioxide into
nitric oxide. In a properly functioning analyzer the value should be close to 1.0. It
is recommended that the molybdenum efficiency be checked every three months.

The ammonia converter efficiency factor (NH3_CE_FACTOR1) is discussed in
more detail in Section 2.3 of this manual. The conversion efficiency of the M501
NH3, should be checked prior to starting long term tests. Both efficiency factors
can be accessed through the analyzer VARS MENU.

The actual formula for computation of the gas concentrations is more
complicated than the above equations, as it includes sample, reaction cell
pressure changes and averaging the PMT signal. Then the zero offset and
slopes are applied to the separate channels (TNx, NOx, NO) to determine the
concentrations. Concentration compensation occurs while the variable
TP_FACTOR under the VARS MENU is switched ON. Otherwise the displayed
concentration is uncompensated. It is recommended that the variable
TP_FACTOR remain on at all times.

1.1.1 Minimizing PMT Drift

In order to account for PMT drift in the analyzer, the AutoZero valve switches
once a minute allowing the analyzer to read zero background. The AutoZero
valve directs the sample gas stream to completely bypass the reaction cell, while
simultaneously filling the reaction cell with Ozone for dark noise measurement.
This is then subtracted as a measurement offset from the raw PMT concentration

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M201E Ammonia Analyzer Teledyne API Model M201E NH3 Analyzer Operator Manual

signal. This process improves zero baseline stability by minimizing the effect of
PMT sensor drift.

1.1.2 Purging the Reaction Cell

As with many chemical reactions the conversion of ammonia in the presence of
other oxides of nitrogen is complicated. It is important to note that the valve
DWELL time for an AZERO measurement has a default setting of 8 seconds.
Shortening this value may not allow enough time to properly purge the reaction cell
of excess nitric oxide from the previous measurements.

In the molybdenum converter operating at 315oC the following significant reactions
are taking place:

Mo + NO2  MoO3 + NO ~100% Efficiency

The M501 NH3, ammonia converter operates at 825oC. At this high temperature,
several reactions occur:

NO  NO Loss = ~ 3%

NO2  NO Efficiency = ~97%
NH3  NO Efficiency = ~97%
NH3  NO2 Efficiency = ~5%

As can be seen from the above reactions, the calculation of the ammonia
concentration and overall calibration of the instrument must be done carefully, if
accurate ammonia concentrations are to be measured.

1.2 SPECIAL CONSIDERATIONS FOR AMMONIA MEASUREMENT

Ammonia is a difficult gas to measure due to its chemical characteristics. The
gas tends to adsorb onto surfaces and diffuse into many materials. The following
precautions should be observed when designing ammonia sampling systems and
connecting them to the M201E analyzer:

 Do NOT use copper tubing or fittings designed for household plumbing.
 Use ONLY Chromatography grade (cleaned, passivated) stainless steel

tubing.

 Use ONLY Glass tubing for sample inlet manifold.
 ALWAYS keep the tubing from the M702SS calibrator to the analyzer as

short as possible. USE stainless steel tubing throughout, especially from the
ammonia calibration bottle to the calibrator.

 If possible HEAT the sample line and DRY the sample gas.
 Sample filters Will cause response delays on both the rise and fall of the

sample signal.

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Teledyne API Model M201E NH3 Analyzer Operator Manual M201E Ammonia Analyzer

These rules apply also to your calibrator’s internal plumbing. It is highly
recommended that you use a M702SS calibrator in conjunction with the M 201E.
The calibrator has stainless steel plumbing throughout. The M700 calibrator
contains Teflon tubing and internal MFC’s that can be affected by the ammonia
gas, therefore, the M700 calibrator is not recommend for use with the M201E
analyzer. It is important to keep the sampling system well maintained.

1.3 SAMPLE FILTRATION

The instrument can be provided with an optional stainless steel sample filter P/N

05571. For minimum response time operation, the instrument should be supplied
with clean sample gas at ambient pressure.

An additional filter resides in the M201E pneumatic pathway. The filter is a
¼” diameter stainless steel sintered filter used to protect the reaction cell flow
control orifice from plugging. This filter will plug rapidly if contaminated sample
gas is not filtered before entering the analyzer.

NOTE: In situations where the sample gas is known to be contaminated with
particulate material it is advisably to add extra filtration. However, it must be
noted that the response time is directly extended through filter additions.

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M201E Ammonia Analyzer Teledyne API Model M201E NH3 Analyzer Operator Manual

1.4 M201E ANALYZER SPECIFICATIONS

Table 1-1. M201E Operating Specifications

Ranges
Measurement Units

Noise at Zero1
Noise at Span1
Lower Detectable

2

Limit
Zero Drift

3, 6

Span Drift6
Lag Time
Rise Time

4

Fall Time4
Sample Flow Rate

Linearity
Temp Range

Dimensions HxWxD
Weight, Analyzer
Weight, Converter
Weight, Pump

Power, Analyzer
Power, Analyzer5

Power, Pump
Power, Pump CEMark5
Environmental

Analog Output

Analog Output
Resolution

Serial I/O
Status Option

1

As defined by USEPA

2

Defined as twice the zero noise level

3

At constant temperature and voltage

4

When pneumatics are conditioned with NH3 overnight and the gases (zero air to NH3) are manually

switched at the sample inlet at the rear of the M501.

5

Electrical rating for CE Mark Compliance

6

Applies when sampling NH3; better results expected for NO/NOx gas measurements.

0-50 to 0-2000 ppb in 1 ppb increments (selectable, independent

, NO, NO2, NOx ranges supported)

NH

3

PPB, PPM, microgram/m
<

0.5 ppb RMS

<

1.0% of reading above 50 ppb

3

, milligram/m3 (user selectable)

1 ppb RMS
2 ppb / 24 hours

<

1.0% FS Range / 24 hours
40 seconds
90% 300 seconds
90% 300 seconds

3

1000 cm
500 cm

/min + 10% (500 cm3/min bypass to vacuum manifold,

3

/min to reaction cell)

NO calibration 1% of full scale
NH

calibration 2% of full scale

3

o

15-40

C
7” x 17” x 23.6” (18cm x 43cm x 61cm)
43 lbs (20 kg)
24 lbs (11 kg)
16 lbs (7 kg)
100V ~50/60 Hz, 120V ~60 Hz, 220V ~50Hz, 240V ~50 Hz, 125
watts
230V ~50 Hz, 125 watts
110V ~60 Hz, 220V ~50 Hz, 240V ~50 Hz, 295 watts
230 V ~50 Hz, 2.5 A peak
Installation Category Pollution Degree 2, Over-voltage Category II
4 user configurable outputs, each can be configured as

0.1, 1V, 5V or 10V. Three outputs convertible to 4-20mA isolated
current loop.

1 part in 4096 of selected full-scale voltage (12 bit)
1x RS-232, 1 x RS-485 or RS-232 or Ethernet(optional).

Communication speed: 300 – 115200 baud (user selectable)
8 status outputs from opto-isolators, 7 defined, 1 spare

14 05206H DCN5910