TABLE OF CONTENTS
Preface........................................................................................................................................4
A Note Regarding Site Access and Logging of Activities ........................................................5
Important items to log.......................................................................................................5
Service Records .........................................................................................................................5
List of Standard Equipment for an Ambient Air Monitoring Site.............................................6
A Note on Serial Cables.............................................................................................................7
Configuring and Setting Up a Coastal Environmental Datalogger Zeno 3200 .........................8
Communicating with the Zeno..........................................................................................8
Downloading Data from the Zeno ....................................................................................9
Calibrating the Internal Temperature................................................................................9
Uploading a Configuration to the Zeno ...................................................................................10
Retrieving Zeno Settings.................................................................................................10
How to Troubleshoot a Channel for Voltage Input ........................................................11
Upgrading to TCEQ's Firmware..............................................................................................12
Electrical Grounding................................................................................................................13
System Diagram for a Typical Site..........................................................................................13
Installing an RM Young Wind Speed and Wind Direction Sensor .........................................15
Model 03002 Wind Sentry.......................................................................................................15
Wiring a S1276Z Air Temperature/Relative Humidity Sensor ...............................................21
S1276Z Air TemperaturE Relative Humidity SENSOR ................................................22
Reviewing the Data for Temperature/Relative Humidity...............................................25
Wiring Zeno 3200 to Read Voltage Levels from an Ambient Air Monitor ............................25
Programming the datalogger...................................................................................................26
Setting a Site for TCEQ Access...............................................................................................27
Setting up an GSM 1208 Enfora Modem to Operate with TCEQ’s Network .........................27
Troubleshooting an Enfora Modem:...............................................................................32
Reading Resistor Color Codes.................................................................................................33
Setting up an ozone analyzer ...................................................................................................34
NOx analyzer ...........................................................................................................................41
References-Wind Speed/Wind Direction.................................................................................46
References-Enfora Modem......................................................................................................46
References-General..................................................................................................................46
Zeno 3200 Board Layout .........................................................................................................47
Serial Cable for Zeno 3200 to Enfora GSM 1208 Modem......................................................48

LIST OF FIGURES
Figure 1: System diagram for an air monitoring site..............................................................14
Figure 2: Wiring the RM Young wind speed/wind direction sensor.....................................15
Figure 3: Wiring diagram for RM Young 3002 Wind Sentry. ..............................................16
Figure 4: Wiring diagram S1276Z Temperature/Relative Humidity sensor. ........................21
Figure 5: Picture of a connected S1276Z Temperature/Relative Humidity sensor. ..............22
Figure 6: Schematic for serial cable between the modem (left), and “Host”, which is the
computer (from page 33 of the modem integration guide, reference #3). ...............................27

4
Preface
This document covers the operating procedures for setting up an ambient air monitoring site and
troubleshooting the various pieces of equipment that are typical of a site. In some cases, other
documents outside this one may be referenced for calibrating other ambient air monitoring
analyzers.

5
A Note Regarding Site Access and Logging of Activities
Site access will be given to those specifically involved with the air monitoring project. If
necessary, a list of names should be provided to the property owners for access to a site.
If ever making any changes to the system, make sure to log in to the datalogger and note those
changes.
Important items to log
1. Initial who made the change or accessed the site
2. If exchanging a piece of equipment, such as an ozone analyzer, make sure to note the
serial number, TAMUK property number if applicable. Some equipment, like weather
instrumentation, may not have a serial number with it.
3. Always note the time the change was made
Service Records
It is imperative to maintain detailed and accurate records of equipment maintenance. For each
analyzer, do the following:
1. Keep an electronic record for each one by serial number. This is a MS-Word file, a text
file, or a simple database.
2. Always date the entry for the activity.
3. Always log each calibration along with the values for the display and voltage output.
4. Always log any parts that were replaced.
5. Always log any part that is cleaned.
6. Always log a filter change.

6
List of Standard Equipment for an Ambient Air Monitoring Site
The following is a list of standard equipment for each site. This list may change as some
equipment is retired or no longer obtainable.
1. Dasibi 1008 Series Ozone Analyzer
2. Teledyne API Model 400E Ozone Analyzer
3. ThermoFisher Model 42C NOx Analyzer (some sites)
4. Zeno 3200 Datalogger (Coastal Environmental Systems)
5. Elk Products PK412 4-Amp 12VDC Power Supply
6. S1276Z Air Temperature/Relative Humidity (Coastal Environmental Systems)
7. RM Young 3002 Wind Speed/Wind Direction Sensor
8. 12VDC Relay (Radioshack)
9. 12VDC Power Supply (for relay)
10. Temperature controller
11. Enfora GSM 1208 IP Addressable Modem with Antenna
12. Ekto air conditioned shelter

7
A Note on Serial Cables
Much of the communication with the Zeno 3200 will be through a serial cable. With the
exception of an older model laptop or a desktop, most new laptops only come with a USB port.
To communicate with a RS-232 9-pin serial, two options are available.
One option is to purchase an USB to serial converter. Though other brands are adequate, the
Radioshack (Part #260-0183) USB cable has been chosen since this model is commonly
available and drivers are available for Windows 98 up to Windows XP. These are usually
adequate for logging into a datalogger like the Zeno 3200.
The second option is to purchase a PCMCIA card shown below that plugs into the card slots on
most laptops. The advantage of this type is that it provides a “hardware” serial port which is
necessary for some types of equipment, especially serial data interface-1200 baud, but is about
the double the price typically of the USB to serial cable.
The RS-232 serial pin configuration is different for each piece of equipment. The Enfora
modem needs a straight through 9-pin serial when accessed from Hyperterminal. Once
programmed and connected to a Zeno 3200, the modem should be connected with the serial
cable specifically for the Zeno. The serial diagrams for the Zeno 3200 are at the end of this
document.

8
Configuring and Setting Up a Coastal Environmental Datalogger Zeno 3200
Communicating with the Zeno
Begin by attaching the RS232 serial cable specifically for the Zeno 3200 to the datalogger and to
either the serial port of the computer or hardware that provides a serial port.
Click on Window's Hyperterminal and set up the COM connection with the following values:
Bits per second: 9600
Data bits: 8
Parity: None
Stop bits: 1
Flow Control: Hardware
To set up the connection, go under File- Properties to reach this dialog box:
Find the COM port to connect to under the Connect Using menu item. Go under the “Configure”
button to set the communication settings.
If the properties window above is greyed and it is not possible to highlight any item in the box,
make sure to disconnect first while in Hyperterminal and return to the window again.
If using a USB to Serial interface or PCMCIA card on a laptop and it is not obvious which COM
port Windows automatically selected, go to serial, find the “System” icon under the Control
Panel in Windows. If it necessary to install a “driver” for the USB to serial or serial card, follow
the prompts and make sure the files are available before installing.
Find the COM port number by doing the following:

9
Press the START button---->Settings--->Control Panel----->System--->Hardware tab--->Device
Manager button. Look for the label that says “Ports (COM & LPT)” with a + next to it and press
the + sign. A submenu should appear listing which ports are active or not working.
• Press the “CALL” button (see Hyperterminal help files) to connect. Either nothing or
some garbage appearing characters will appear. Press “U” <Enter> to get to the Zeno's
User Menu.
If successful, the following should appear:
USER MENU
(C) Communications Menu (T) Test Menu
(F) System Functions Menu (Z) Zeno Program Menu
(S) Sample Period Menu (Q) Quit
(D) Data Retrieval Menu (H) Help
The Zeno being contacted must also be set at 9600 baud which is the default setting.
Downloading Data from the Zeno
To download from the Zeno, connect as instructed. At the User's Menu, press “D” for the “Data
Retrieval Menu”. Select an option for downloading data.
Make sure to activate data capture while in Hyperterminal with the following:
1. Go up to the Transfer on the menu bar.
2. Select Capture Text
3. Follow prompts for a file name and a directory location.
4. Follow Zeno prompts to obtain data.
5. After the Data Retrieval Menu appears again, select Transfer---->Capture Text--->Stop.
The data is now saved to a text file. If you come back later in the day or week, you can save the
data to the same text file since the Hyperterminal will append the text to the existing selected
file.
However, it may be easier to load the text file into and editor and remove the extra keystrokes
and menu items recorded before importing into a spreadsheet.
Calibrating the Internal Temperature
The internal clock on the Zeno 3200 is dependent upon temperature for accuracy.
Take the Zeno 3200 out of the box and set out in the room for at least a day. Take a mercury
thermometer and note the temperature. Go to the (S) System Function Menu. Select the option
(T) and enter the temperature as Fahrenheit or Celsius. For example, enter the temperature as
either 70F or 21.1C at the input prompt. Checking this parameter at least monthly will help the
Zeno maintain a more accurate time value.

10
To get the right time, go to www.time.gov to obtain the actual time for your region of the
country. Do not rely on the computer's internal clock since it may not match. The computer,
whether it is a laptop or desktop, will set its time with the server when you log on to the system.
A cell phone's clock is also good since many cell phone providers utilize the atomic clock to
determine time, but always check with www.time.gov to determine whether this is the case.
Uploading a Configuration to the Zeno
WARNING: Before proceeding, make sure to download all current records. This procedure
clears the flash memory of all stored data.
1. Log onto the Zeno 3200 using a Hyperterminal program.
2. Go to the (Z) Zeno Program Menu to (L) System Load Menu to ( R) Receive
Configuration From Host.
3. Answer 'Y' to the WARNING: All records in data logging memory will be deleted!
Continue? (Y/N)
4. Go to the menu bar at the top of the Hyperterminal program and select Transfer-Send
Text File. Browse to the directory to find the file to upload.
5. After uploading, go back up to the (Z) Zeno Program Menu and select (E) Save
Parameters to EEPROM. Failure to do follow this step will cause the datalogger to lose
its configuration when the power is turned off or disconnected.
After downloading the sampling will begin. Give the datalogger at least a sample period or two
to stabilize and so that readings will begin to appear when selecting the option to test the sensor
inputs.
Retrieving Zeno Settings
Sometimes it may be necessary to communicate with technical support whether the configuration
is correct or it is necessary to simply save the settings in an electronic file so that it can be
uploaded into other dataloggers. Follow the previous procedure to get to the (L) System Load
Menu and then to (T) Transmit Configuration From Zeno. Follow the instructions above to
collect the text as it is transferred from the Zeno. It may also be a good idea to not only to store a
backup copy of the configuration but also (V) View Configuration & Menus (ASCII).
FLASH MEMORY Errors
Sometimes, the Zeno will fall into this loop:
4 flash memory chips are installed!
Please wait while flash memory is initialized...
[7mERROR: Task Z_OFFSET watchdog timeout!

11
To resolve, do the following:
1. Remove Zeno from enclosure
2. Open Zeno by removing the screws on the sides. Follow procedures with grounding
straps when handling electronics.
3. Once opened, remove the flash memory board. Two screws hold it in place.
4. Power up the Zeno with out the flash memory and let it run for a few minutes.
5. Turn the power off and replace the flash memory.
6. With the flash memory installed power up the Zeno.
This should resolve the problem.
How to Troubleshoot a Channel for Voltage Input
1. Find a DC Power supply that outputs up to 5V or a couple of alkaline batteries like AA,
C’s, D’s can also work as well.
2. For the selected channel, wire a connection to channel from the “+” connection of the
battery or power supply and wire the “-“ to any of the “GND” terminals of the Zeno 3200
datalogger.
3. Check the output voltage of the power supply with a digital voltmeter.
4. To see the voltage reading, go to the User Menu of the Zeno and go to the (T) Test
Menu. Select option “R” or “S” to see the value of the inputs and see if the numbers
match the value of the voltmeter.
Note: It may be necessary to reduce the sampling period to a few seconds to test results quicker.
Change the sampling back to the intended time after testing.

12
Upgrading to TCEQ's Firmware
To upgrade the firmware, make sure to have the current file3.6 Test with CTS.mot for uploading.
1. Connect the DC power to the datalogger.
2. Connect the 9-pin Zeno serial cable to the "COM3" on the datalogger.
3. Connect the Zeno serial cable to the computer. If connecting using an USB to serial
converter, it may be necessary to force the converter to a COM2 identification.
4. To force a COM2, go to Start Settings Control Panel System Hardware (tab) Device
Manager (button).
5. Look for the "Ports (COM & LPT)" and find the COM port the USB to serial cable is
identified. Highlight connection, right click for "Properties". Go to Port Settings (tab),
Advanced (button), change COM port number to "2". This should force it to a COM2.
6. Run the Flashloader program. This is a DOS program that one should be able to run from
either Windows '98, Windows 2000, or Windows XP. Follow the prompts.

13
Electrical Grounding
The purpose of electrical grounding is to provide a reference point for electronic hardware so
that it can collect data from various instrumentation accurately.
The following is a symbol for a chassis ground (grounded to a huge piece of metal):
The following is a symbol for earth ground. The connection may be to a copper rod hammered
into the ground or to an AC electrical ground:
For this project, it was determined that the best ground was completed by wiring to the
large grounding terminal on the Zeno 3200 to the AC electrical ground. This is done by
purchasing a standard 110V 3-prong electrical plug and wiring the ground to the
grounding terminal of the plug.
Metal rods were used in the past, but some sites would have in inadequate ground when it
became to dry at times during the year and causing problems with obtaining accurate data. The
grounding rod seemed to work best when the soil was either damp to very wet. Since this cannot
always be assured, ground to the AC system with an electrical plug and an insulated strand of
copper wire attached to the grounding post of the Zeno 3200.
System Diagram for a Typical Site

14
Figure 1: System diagram for an air monitoring site.
This is a system diagram showing how everything is connected together at each site.
Most of the components are obvious. A 4-Amp surge protected power supply was chosen for
powering the DC equipment. The 12VDC relay with an external power supply helps identify
whether AC power is on. The temperature controller protects the analyzer from becoming
overheated should the power fail; make sure to replace the AA batteries every few months.

15
Installing an RM Young Wind Speed and Wind Direction Sensor
Model 03002 Wind Sentry
Tools required: Needle nose pliers, small flat blade screwdriver, small Phillips screwdriver, wire
stripper, wire cutter, large hammer, and compass to determine direction.
Materials required: #22 AWG shielded multi-conductor cable of appropriate length (Belden
9944), a 1-MegaOhm, ½ Watt, 5% tolerance resistor (Radio Shack part number 271-1134),
grounding rod (Radio Shack part number 15-530), #12 AWG copper wire for connecting the
ground of the Zeno 3200 to the rod.
1. Unpack the Wind Sentry from the box and make sure all components are present. Finish
assembling the unit using the tool provided to mount the cups properly. Make sure not to
bend the cups.
2. Open the cover and clip the jumper (J1 connection) located to the left of the terminal strip
as shown in the following picture.
Figure 2: Wiring the RM Young wind speed/wind direction sensor.
3. Wire the sensors according to the following wire diagram. Make sure you note which
color of the multi-conductor cable. There are no hard rules about which color wire should
be used for each connection, but try to stay consistent for each site installation so that
troubleshooting is easier. Here is the wiring diagram:

16
Figure 3: Wiring diagram for RM Young 3002 Wind Sentry.
4. Mount the instrument on a pole no larger in diameter than one inch. Make sure the wind
cups are oriented due south. Use a compass or GPS with compass to determine southerly
direction.
5. Make sure the grounding rod is securely pounded into the ground and that the grounding
connection from the rod to the grounding terminal on the Zeno 3200 to the earth ground
of the instrument.
SENSOR MENU
Settings for Wind Direction
ITEM DATA COMMAND ENTERED
Item 1: Sensor Type code = 1 (12-bit ADC) c1/1
Item 2: Sensor Name = WDIR c2/WDIR
Item 3: Sensor Input Channel = 8 c3/8
Item 6: Switched Power code = 0 (NO SWITCHED POWER) DEFAULT
Item 7: Sensor Excitation Voltage = 2 (EXC = 2.50 VDC) c7/2
Item 8: Switched Excitation Return = E c8/E
Item 9: Sensor Warm up Time = 0 DEFAULT
Item 10: Sensor Sample Count = 1 DEFAULT
Item 11: Maximum Sensor Readings = 0 DEFAULT
Item 12: Sensor Timing Loop = 2 c12/2
Item 13: Conversion Coefficient A = 0 DEFAULT
Item 14: Conversion Coefficient B = 140.8 c14/140.8
Item 15: Conversion Coefficient C = 0 c15/0
DEFAULT = Default value: it is not necessary to enter a command for this item.

17
Settings for Wind Speed
Item 1: Sensor Type code = 7 (Digital Freq., f<10kHz) c1/7
Item 2: Sensor Name = wndspd c2/WSPD
Item 3: Sensor Input Channel = 10 c3/10
Item 7: Sensor Excitation Voltage = 0 (NO EXCITATION
VOLTAGE)
DEFAULT
Item 8: Switched Excitation Return = 0 (NO EXCITATION RETURN) DEFAULT
Item 10: Sensor Sample Count = 1 c10/1
Item 14: Conversion Coefficient B = 1.6771
c14/1.677
Item 15: Conversion Coefficient C = 0 c15/0
1 Output is in m/s when B=0.750, mph when B=1.677, knots when B=1.4562, kph when
B=2.6994. Refer to page 2 of the manual for more information.
PROCESS MENU
Settings for Wind Direction/Wind Speed
Item 1: Process Category Code 5 : Arithmetic C1/5
Item 2: Process Type code 2 : Add Data & Constant Process C2/2
Item 3: User-defined Process Name = WSPD c3/WSPD
Item 4: Input for Augend(X) S3 : WSPD 2
C4/S3 2
Item 5: Constant Addend (Y) 0.43
C5/0.4 2
2 This data will vary depending on the number of sensors being connected to the ZENO®
-3200.
3 Change constant with respect to previous constant entered for the wind speed: meters per
second: 0.2, knots and mph: 0.4, kilometers per hour: 0.7. See calibration formulas in the Wind
Sentry manual.
Item 1: Process Category Code 5 : Arithmetic C1/5
Item 2: Process Type code 13 : Conditional Select Process C2/13
Item 3: User-defined Process Name = 3: WSPD c3/WSPD
Item 4: Input for Control Data (C) S3 : WSPD C4/S3
Item 5: Input for Output if Control=0 (X) S3 :WSPD C5/S3
Item 6: Input for Output if Control<0 (Y) S3 C6/S3
Item 7: Input for Output if Control>0 (Z) P3.1 : WSPD C7/P3.1

18
Item 1: Process Category Code 2 : Environmental C1/2
Item 2: Process Type code 1 : Wind Vector Average Process C2/1
Item 3: User-defined Process Name =
Item 4: Input for Wind Speed P4.1 :WSPD C4/P4.1
Item 5: Input for Wind Direction S4: WDIR C5/S4
Item 6: Input for Compass S0.1 C6/S0.1
Item 7: Wind Gust Window(1 to 5 sec) 4 C7/4
DATA OUTPUT MENU
Settings for Average Wind Speed
Item 1: Field Type code = 9 : Transmit and Log Data Field c1/9
Item 2: Output Message(s) = 1 DEFAULT
Item 3: Field Name = WSPD c3/WSPD
Item 4: Data Process Record = P5.1 4
c4/P5.1 4
Item 5: Field Decimal Places = 1 c5/1
Item 6: Field Width = 5 c6/5
Item 7: Data Storage Class Code = 7 : Compressed Floating Point (2) c7/7
4 This value will vary depending on the number of sensors being connected to the ZENO®
-
3200. Further, if you want scalar average wind speed instead of vector average wind speed, use
data output #3; i.e., P1.3.
Settings for Average Wind Direction
Item 3: Field Name = WDIR c3/WDIR
c4/P5.2 5
Item 5: Field Decimal Places = 0 DEFAULT
Item 7: Data Storage Class Code = 4 : 2-byte unsigned integer c7/4
5 This value will vary depending on the number of sensors being connected to the ZENO®
-
3200. Further, if you want independent wind vector average instead of component wind vector
average, use data output #12; i.e., P1.12.
* Refer to the sensor's manual for correct signal names.
Troubleshooting Wind Speed and Wind Direction Sensor
Problem: No wind speed or wind direction values appearing test menu option.
Solution: Is the wiring connected properly? Is a voltage or frequency signal reaching the
channel? Check for a signal by placing a voltmeter, select DC of at least 20V, and touch the
leads to the Zeno 3200. The voltmeter's display should bounce rapidly with an oscillating
plus/minus voltage level while the cups are spinning. If signals are reaching the channel
locations (Channel 8 and Channel 10), then recheck the program configuration.

19
Solution: For wind direction, check the following using a voltmeter.
1. Check to see that the excitation voltage is reaching the instrument. Select a DC voltage
and place probes between the WDREF and WDEXC. If close to 2.5V, then the switched
excitation voltage is available.
2. Remove any power from WS/WD sensor. Select a resistance range up to 12-kilo-ohms on
a multi-meter and see if resistor range is from 2-kilo-ohms to 12-kilo-ohms appears when
leads are touched between the WDREF and WSIG terminals. If so, then the resistor is
fine.
Problem: Wind speed is recording properly but wind direction stuck on a particular value.
Solution: Review wiring to make sure no strands of wire from the shielding of the cable or any
other connectors are shorting the connection. For example, if other wires are touching anywhere
along the resistor, the circuit path could be changed resulting in improper readings. If this
appears fine, follow instructions for checking excitation voltage and resistance of sensor.

20
Checking the Data
To see if the data collected is valid, compare to other sites near by in the area, especially those
operated by the National Weather Service or Texas Commission on Environmental Quality. Due
to the practicality of using sealed bearings, the threshold limit is about 4 to 5 mph, so anything
less will result in a zero [mph] even though the more expensive gear used by the organizations
mentioned above could show 1 to 4 mph wind speeds for a given similar time frame. Also, the
official weather stations mount their wind speed/wind direction equipment at a standard height of
30-feet.
If there are any questions of the instrument's validity, consult with the vendor to evaluate the
equipment.
Reference Material
ZENO®-3200User Manual Version V2.02, June 27, 2003, P/N: 0302116012, Revision B,
COASTAL ENVIRONMENTAL SYSTEMS, Inc.820 First Avenue South • Seattle, WA 98134
Telephone (206) 682-6048 • Fax (206) 682-5658
Meteorological Monitoring Guidance for Regulatory Modeling Applications, EPA-454/R-99-
005, U.S. ENVIRONMENTAL PROTECTION AGENCY, Office of Air and Radiation
Office of Air Quality Planning and Standards, Research Triangle Park, NC 27711
February 2000
MODEL 03002,WIND SENTRY, FEBRUARY 1999, MANUAL PN 03002-90 R. M. YOUNG
COMPANY

21
Wiring a S1276Z Air Temperature/Relative Humidity Sensor
Tools required: Needle nose pliers, small flat blade screwdriver, wire stripper, adjustable wrench
for mounting the sensor to a weather station.
Materials required: 0.1% Tolerance 4.99k-ohm resister which came with product (WARNING!:
Do not use any other resistor with less tolerance)
Begin by stripping any additional wire if necessary so that an appropriate connection can be
made with the terminals. After confirming the colors match, use the following wire diagram:
Figure 4: Wiring diagram S1276Z Temperature/Relative Humidity sensor.
The S1276Z recently had redesign that allows it to operate without the 12V SWD excitation. The
programming can remain the same; it is fine to modify the program to keep the 12V SWD off.
When ordering a new S1276Z, make sure to keep the wire colors the same.

22
Figure 5: Picture of a connected S1276Z Temperature/Relative Humidity sensor.
If you choose a different channel for input, do not forget to change the location of the resistor
relative to the chosen channel and reprogram the datalogger to match the hardware change. See
Zeno 3200 operations manual for more information.
Following EPA protocol for installing weather instrumentation, make sure to mount the sensor at
least 6 feet above ground.
S1276Z Air TemperaturE Relative Humidity SENSOR
SENSOR MENU
Item 1: Sensor Type code = 2 (18-bit Single Ended A to D) c1/2
Item 2: Sensor Name = AT c2/AT
Item 3: Sensor Input Channel = 5- c3/5-
Item 4: Analog Channel Gain = 1 c4/1
Item 5: Analog Channel Attenuation = 4 c5/4
Item 7: Sensor Excitation Voltage = 2 (EXC = 2.50 VDC) c7/2
Item 8: Switched Excitation Return = 0 DEFAULT
Item 14: Conversion Coefficient B = 0.4 1
c14/0.4 1
Item 15: Conversion Coefficient C = 0 DEFAULT
Item 17: No. of Additonal 15-msec Delays 0 DEFAULT
1 Output is in: CENTIGRADE

23
Item 1: Sensor Type code = 2 (18-bit Single Ended A to D) c1/2
Item 2: Sensor Name = RELHUM c2/RELHUM
Item 3: Sensor Input Channel = 5+ c3/5+
Item 4: Analog Channel Gain = 1 c4/1
Item 5: Analog Channel Attenuation = 2 c5/2
Item 6: Switched Power code = 4 : (12v SW’D B) C6/4
Item 7: Sensor Excitation Voltage = 0 DEFAULT
Item 8: Switched Excitation Return = 0 DEFAULT
Item 9: Switched Power Warm up Time = 1 C9/1
Item 14: Conversion Coefficient B = 100 c14/100
Item 15: Conversion Coefficient C = 0 DEFAULT
Item 17: No. of Additonal 15-msec Delays 0 DEFAULT
PROCESS MENU
Item 1: Process Category Code = 4 : Special Sensor C1/4
Item 2: Process Number 1 : NTC Thermistor Process c2/1
Item 3: User-defined Process Name = 3 : AT_CALC c3/AT_CALC
Item 4: Input Thermistor Voltage = S5 : AT 2
c4/S5 2
Item 5: a-Coefficient 0.001288 C5/0.001288
Item 6: b-Coefficient 0.0002356 C6/0.0002356
Item 7: c-Coefficient 9.557e-08 C7/9.557e-08
Item 8: R2 Resistance 4990 C8/4990
Item 9: Upper Limit 50 C9/50
Item 10: Lower Limit -40 C10/-40
Item 11: BIT Flag Number (1-31) 12 C11/12
-
3200.
Item 1: Process Category Code = 1 : General C1/1
Item 2: Process Number 2 : Averaging Process c2/2
Item 3: User-defined Process Name = RH_AVG C3/RH_AVG
Item 4: Input Thermistor Voltage = S6 : RELHUM 2
c4/S6 2
-3200.
Item 1: Process Category Code = 5 : Arithmetic C1/5
Item 2: Process Number 2 : Add Data & Constant Process c2/2
Item 3: User-defined Process Name = RH_ADD C3/RH_ADD
Item 4: Input for Augend (X) P7.1 : RH_AVG 2
C4/P7.1 2
Item 5: Constant Addend (Y) -100 C5/-100
-
3200.

24
Item 2: Process Number 4 : Subtract Data Values Process c2/4
Item 3: User-defined Process Name = RH_SUB C3/RH_SUB
Item 4: Input for Minuend (X) P7.1 : RH_AVG 2
C4/P7.1 2
Item 5: Input for Subtrahend P8.1 : RH_ADD C5/P8.1
-
3200.
Item 2: Process Number 13 : Conditional Select Process c2/13
Item 3: User-defined Process Name = RH_SELECT C3/RH_SELECT
Item 4: Input for Control Data © P8.1 : RH_ADD 2
c4/P8.1 2
Item 5: Input for Output if Control=0(X) P7.1 : RH_AVG C5/P7.1
Item 6: Input for Output if Control<0(Y) P7.1 : RH_AVG C6/P7.1
Item 7: Input for Output if Control>0(Z) P9.1 : RH_SUB C7/P9.1
-
3200.
DATA OUTPUT MENU
Item 3: Field Name = at c3/at
c4/P1.1 3
Item 5: Field Decimal Places = 1 c5/1
Item 7: Data Storage Class Code = 7 : Compressed Floating Point (2) c7/7
DEFAULT = Default Data, it is not necessary to enter a command for this Item.
-3200.
To determine whether the temperature and relative humidity are functioning properly, compare
against a sling psychrometer that has a thermometer and is used to determine the humidity level.
The air temperature should at least within a couple of degrees and the humidity within a +/- 3%
according to the product's specification sheet.

25
Reviewing the Data for Temperature/Relative Humidity
Since temperature and relative humidity may not vary all that much across a region, it is
acceptable to compare these values to other weather stations in the area at the same of time of
day under similar weather conditions.
Wiring Zeno 3200 to Read Voltage Levels from an Ambient Air Monitor
The maximum voltage a Zeno 3200 is capable of reading is 5V. For ambient air monitoring
applications with an ozone monitor, it is not too likely that a reading higher than 200 or 300 ppb
will be recorded on a REGULAR basis. Readings in the 4.80 ppm range have been recorded, but
only during thunderstorm activity and for brief periods of time.
If the ozone concentration is at 40 ppb on the display, the voltage could be recorded as 0.040 V
or 0.040 ppm. Programming the output can change the scaling of this number.
TCEQ prefers differential voltage connections as opposed to differential voltage connections.
To wire a differential voltage connection, make sure to know which (+) and (-) output terminals
will be needed to record data.
Choose a channel, and wire the (+) to the (+) of the channel, and the (-) to the (-) of the channel.

26
Programming the datalogger
* ZENO 3200 System Setup File
* Program Version And Date: ZENO-3200 V1.60-1244E3.6-TEST with CTS Sep 25
2003 08:23:49
(C)opyright 2001, Coastal Environmental Systems, Seattle, WA, USA.* Setup
File Date And Time: 06/11/28 16:22:20
PARAM1 300 0 300 2 4 30 000 3216 9600 9600
PARAM2 9600 0 0 0 0 3 0 0 0 0
PARAM3 16777 0 60 18 0 0 0 0 2 2
PARAM4 2 2 0 0 0 3276800 1 18389 0 0
PARAM5 0 0 0 0 0 0 0 0 0 0
PARAM6 0 0 0 0
PARAM7 "NONE" "NONE" "" "ATQ0V1E1&C1S0=1" "" "" "" "LEADS" "Odem site"
SENSOR 1 "INT_TEMP" 3 0 0 4 0 0 1 1 0 3 0 1.8 32 0 1 0
SENSOR 7 "WSPD" 14 0 0 0 0 0 0 1 0 2 0 1.677 0.4 0 1 0
SENSOR 2 "WDIR" 8 0 3 0 2 5 0 1 0 2 0 140.8 0 0 1 0
SENSOR 2 "TEMP" 10 0 2 0 2 0 0 1 0 2 0 0.4 0 0 1 0
SENSOR 2 "HUMIDITY" 3 0 1 5 0 0 1 1 0 2 0 100 0 0 1 0
SENSOR 3 "O3" 2 0 1 0 0 0 0 1 0 2 0 1 0 0 1 0
SENSOR 8 "PWR_TEST" 11 0 0 4 0 0 0 1 0 3 0 1 0 0 1 0
SENSOR 8 "" 6 0 0 0 0 0 0 1 0 1 0 1 0 0 1 0
SENSOR 8 "" 7 0 0 0 0 0 0 1 0 1 0 1 0 0 1 0
PROCESS 1 2 S1.1
PROCESS 2 1 S2.1 S3.1 S0.1 4
PROCESS 1 2 S6.1
PROCESS 3 3 S1.1 -999 -1000 0 0
PROCESS 3 3 S7.1 0.1 0.9 22 0
PROCESS 1 2 S5.1
PROCESS 4 1 S4.1 0.001288 0.0002356 9.557e-08 4990
PROCESS 5 8 P7.1 0 1.8 32
PROCESS 3 1 P4.1 P4.1 P4.1 P4.1 P4.1 P4.1 P4.1 P4.1
DATA 6 1 "<0D><0A>" 1.1 0 0 0 1
DATA 4 1 "" 1.1 0 0 0 1
DATA 3 1 "" 1.1 0 0 0 1
DATA 9 1 "BIT" 9.1 0 6 0 6
DATA 9 1 "WSPD" 2.1 2 5 1 7
DATA 9 1 "WDIR" 2.2 2 5 2 7
DATA 9 1 "SDHZWD" 2.6 2 5 3 7
DATA 9 1 "WSPDAVG" 2.3 2 5 4 7
DATA 9 1 "MAXGUST" 2.7 2 5 5 7
DATA 9 1 "TEMP1" 8.1 2 5 6 7
DATA 9 1 "INT_TEMP" 1.1 2 5 24 7
DATA 9 1 "O3_AVG" 3.1 4 6 25 8
DATA 9 1 "REL_HUMIDI" 6.1 2 5 38 8
DATA 6 1 "50,K,00.00" 1.1 0 0 0 1
DATA 6 1 "00," 1.1 0 0 0 1
DATA 6 1 "51,K,99000" 1.1 0 0 0 1
SCHED "ozone span" "06/01/25 00:00:00" 00:01:00:00:00 "SDO118" U D
SCHED "stop span" "06/01/25 00:30:00" 00:01:00:00:00 "SDO018" U D
SCHED "zero span" "06/01/25 00:30:00" 00:01:00:00:00 "SDO119" U D
SCHED "stop span" "06/01/25 01:00:00" 00:01:00:00:00 "SDO019" U D
* !!SYSTEM TRANSFER COMPLETE.
* Turn Off File Capture Now.
* Enter Any Key To Continue.

27
Setting a Site for TCEQ Access
Before a site can go live, some initial paperwork must be submitted to TCEQ that will then
assign an appropriate site number and network address.
Setting up an GSM 1208 Enfora Modem to Operate with TCEQ’s Network
Wire up the Enfora modem a 5V to 30V DC power supply. Make sure not to transpose the plus
and minus to the power connectors. Connect the external antenna.
Construct a 9 pin serial cable available that is connected one-to-one for each pin with a female
plug on one end and a male plug on the other. Here is how the cable should be wired (from page
33 of the modem integration guide-Reference 3):
1 DCD 1
2 RX 2
3 TX 3
4 DTR 4
5 GND 5
6 DSR 6
7 RTS 7
8 CTS 8
9 RING 9
Figure 6: Schematic for serial cable between the modem (left), and “Host”, which is the
computer (from page 33 of the modem integration guide, reference #3).

28
Connect the modem to the computer’s serial port or an USB to serial interface. Plug in the
modem and apply power with no SIM card installed. The solid amber LED should be solid; the
green LED will probably blink which means it is searching a connection. A solid green LED
indicates that it is registered with a GSM (this will not happen until a valid SIM card is inserted).
Click on Window's Hyperterminal (Start Programs Accessories Communications
Hyperterminal) and set up the COM connection with the following values. These are the factory
defaults for the GSM 1208 modem:
Bits per second: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow Control: None
To set up the connection, go under File- Properties to reach this dialog box:
Find the COM port to connect to under the Connect Using menu item. Go under the “Configure”
button to set the communication settings. After pressing the “OK” button, the modem should
connect.
If the properties window above is grayed and it is not possible to highlight any item in the box,
make sure to disconnect first while in Hyperterminal and return to the window again.
If using a USB to Serial interface or PCMCIA card on a laptop and it is not obvious which COM
port Windows automatically selected, find the “System” icon under the Control Panel in
Windows. If it is necessary to install a “driver” for the USB to serial or serial card, follow the
onscreen instructions and make sure the files are available before installing.
Find the COM port number by doing the following:

29
Press the START button---->Settings--->Control Panel----->System--->Hardware tab--->Device
Manager button. Look for the label that says “Ports (COM & LPT)” with a + next to it and press
the + sign. A submenu should appear listing which ports are active or not working. Note the
correct port, and return to Hyperterminal.
While setting up the properties, go under the “Settings” tab and press the “ASCII Setup” button.
The following settings can be modified while connected to the Enfora modem.
Check the box as shown and put the values at each location as shown. Press OKAY to continue.

30
The settings can be saved for another modem. Press OK again to return to Hyperterminal
window and connect. Once connected, type “ATI” and press enter. The message “Enfora, L.P.”
should appear followed by an “OK.”
Type the following commands and press enter. An “OK” should appear after each command is
executed. Each command can be entered in upper or lower case (AT&F and at&f are valid). The
first command sets the Enfora to factory defaults, the second stores the changes, and the third
changes the baud rate of the modem to 9600.
AT&F
OK response
AT&W
OK response
AT+IPR=9600
OK response
NOW disconnect HyperTerminal and modify the connection properties to 9600 baud, and
reconnect. The modem can stay powered while doing this part. To test connection, type
“ATI” and press enter and wait for an “OK” response.
Create the following text file by copying from this document and pasting into Notepad or a word
processor and save as text file with a filename and with the extension “.txt”. Leave no additional
spaces between the lines or lines at the beginning of the file. Make sure to assign a modem
channel number and remove the comment in parenthesis.
AT$PADSRC=2000
AT$PADTO=1
AT$HOSTIF=2
AT$ACTIVE=0
AT&W
AT+CGDCONT=1,”IP”,”TCEQ.CCS”,,0,0
AT%CGPCO=1,”TCEQW00xx@TCEQ.CCS,TCEQ12”,0 (xx = the assigned modem
channel/IP number-remove this comment)
AT&W
AT%CGPPP=1
AT$NETMON=15,1,0,1
AT$AREG=2
AT&W
AT$EVTIM1=43200
AT$STOATEV=1,AT$RESET
AT$EVENT=10,0,12,1,1
AT$EVENT=10,3,44,1,0
AT&W

31
To send the previously saved text file, select Transfer Send Text File while connected to the
modem. Select the file and follow the prompts.
As each command is executed, an “OK” response should appear. After the script is finished,
power off the modem and insert the SIM Card and connect the antenna. Turn power back on.
This can be done while still connected with the serial cable and logged in with Hyperterminal.
After powering on the modem, the AT-Command Interpreter ready may appear. Type the
following and press enter:
ATX4
OK response
AT&W
OK response
AT$RESET
(This command will disappear and the modem will act as if it was power cycled)
After some seconds, AT-Command Interpreter ready followed by LISTEN 10.200.4.XX
(where XX is the network identification) should appear. If the service for the modem has been
activated, the green LED should be solid. Type AT+CREG? and see the response.
AT+CREG?– returns two numbers 0,n where n =
0 = not reg, not searching
1 = reg on home network
2 = not reg, but searching
3 = reg denied
4 = unknown
5 = reg, roaming
If a tower is found, it should respond with +CREG: 0, 1. To test if communicating with a Zeno
3200, contact someone at TCEQ with access behind their firewall. Access Hyperterminal, and
setup for a TCP/IP(Winsock) connection. Enter the network address such as 10.200.4.XX where
XX is the number assigned to the modem in the script. If the Zeno 3200 responds then the
modem should be ready to go. Power down modem and put into service.
Do the same for other modems, but make sure to change channel/IP number in the script.
Here are some other modem commands to help determine activation:
AT%BAND=1,16 --this command forces the modem to seek American tower to transmit at 850
MHz
AT%BAND=1,31 – this command allows the modem to roam to any tower
To get information on signal strength:
AT+CSQ Will return the signal strength (do not type ?)
+CSQ: 10,99 Receive signal strength = 10, -93 dBm

32
See reference #2 regarding the modem AT command set to know what each possible return
means.
If you can not see characters on the screen type ATQ0
If you still cannot see characters on the screen type ATE1V1
Troubleshooting an Enfora Modem:
Problem: After powering on, the green LED flashes continuously.
Solution: Is the SIM card inserted or inserted correctly? Make sure to determine coverage area
from wireless provider and check that service has been activated and SIM card is valid. Also
connect external antenna.
Problem: Modem responds with an “OK” to AT&F and AT&W, but an “ERROR” with most
other commands.
Solution: Make sure the serial cable has no shorts and is wired as directed.
Problem: No signs of any communication with modem.
Solution: Is power connected correctly? Is amber LED solid after turning on power from DC
power supply? Correct voltage range applied? Communicating with correct serial cable? Correct
COM port setting on host computer? Communication settings as instructed? Was the baud rate
previously changed on modem and not documented?
Problem: Errors were received while trying to send script file.
Solution: Make sure power is on to modem and with the correct polarity. Make sure proper
driver for serial connection is installed on the computer if applicable and check that the
connection is valid. Repeat steps from the beginning and try again.
Problem: Modem out in field for sometime, can no longer respond.
Solution: Test modem with another available SIM card. If it works with different SIM card,
replace SIM card.

33
Reading Resistor Color Codes
The above is a color code table from the University of Pennsylvania. A resistor is a device that
resists the flow of charge. The unit of resistance is the ohm, pronounced om with a long o.
As you can see, resistors are read by the use of two significant digit colors, one multiplier and
one tolerance color. Think of the multiplier as the number of 0's stuck on the end. For example,
just put 3 0's after the 27 below. Note that the K stands for kilo or thousand. You will also see
Meg in the instructions. It means million. So brown, violet, green means put down a 4 then a 7
then 5 0's, or 4700000 which means 4,700,000 or 4.7Meg ohms.
The board also uses variable resistors for offset, bass, treble and volume. They usually have their
values printed on them, but can also have a code number that works like the resistor code. For
example, 103 means put a 1 down, then a 0, then 3 more 0's, which gives 10000 ohms or 10K
ohms.

34
Setting up an ozone analyzer
Teflon sampling tube (1/8” ID X ¼”OD) exposed to ambient atmosphere and should be
protected from rain using a rain guard built by PVC pipes. Inside the enclosure it should be
insulated to avoid condensation of water and connected to an external filter. The external filter
should be replaced for every 45 days or when dirty to avoid entering of particulate matter into
the analyzer. The external filter should be connected to the sample port of the calibrated Dasibi
1008 or API ozone analyzer. Connect the positive and negative terminals at the back of the
ozone analyzer to channel 2 on the zeno data logger for transmission of 5 minute ozone
concentrations to TCEQ LEADS system.
Checks and troubleshooting during a site visit:
1. Check for water condensation in the tubing. If water is found replace the tubing,
filter and the ozone analyzer.
2. Check the filter in the external filter holder, if dirty replace with a new filter. In case
of API open the ozone analyzer and check for the internal filter, if dirty replace with a
new filter.
3. Connect the laptop to the zeno datalogger and cross check the ozone reading
recorderd by zeno datalogger and the concentration measured by the ozone analyzer.
If the offset is more than 2 or 3 ppb check the terminal connections at the back of the
ozone analyzer and the zeno datalogger. Also check the grounding connection of
zeno datalogger.
4. Perform the leak check by closing the sample port for both dasibi and API ozone
analyzers.
1. In case of Dasibi ozone analyzer the flow should drop to ‘0’ l/min and in case of
API Teledyne the flow should drop to ‘0’ and the pressure should also drop to
nearly 3 to 4 HG-A
If the analyzer fails to pass the leak check replace it with a new calibrated ozone
analyzer.
5. If a dasibi ozone analyzer is displaying negative values replace it with a new
calibrated ozone analyzer.
6. In case of a “photo reference warning” for an API Teledyne analyzer perform the
following steps:
1. Disconnect the sample line and open the ozone analyzer.
2. Using the <TST > button on the front panel to display ‘O3reference’ value.
3. Adjust the potentiometer located on the end panel of the UV lamp bench to till the
‘O3reference’ value is around 4200 MV.
7. In case of a “Lamp stability warning” adjust the UV lamp on the lamp bench till the
‘O3reference’ value is around 4200MV.
8. If a “Sample flow warning” is displayed on an API Teledyne ozone analyzer, check
the external filter and internal filter if dirty replace. Check for the sample tube for
bents or insects. If the filters and sample tube are clean replace with a calibrated
ozone analyzer.

35
9. If the monitor displays an “Analog cal warning”, the analog output channels should
be calibrated. The steps to be followed are:

37
Calibration a Dasibi ozone analyzer:
The ozone analyzer should be calibrate checked in the lab before taking to the field. It should be
turned on for at least an hour before following the calibration steps. This is necessary so that the
UV Lamp can obtain operating temperature. Pumps and valves can be off.
The steps for calibration of a dasibi ozone analyzer are:
Setting up ozone analyzer for calibration
1. Connect the scrubber to a particulate matter filter and then to inlet.
2. Connect one ozone output manifold to inlet of 1008-PC
3. Connect second output to another monitor to be calibrated.
Note: Make sure each connection is firmly attached to each port for air flow.
After connections are set properly, set the mode to ‘Operate’ and turn on the 1008-PC and the
other monitor to be calibrated. Set the switch next to the thumbwheel to ‘Auto’
Note: Make sure to allow each instrument being calibrated to run for at least an hour so the lamp
and other elements inside reach operational temperatures. The lamp is the main element that
needs to be warm, so the pumps can be off
The instrument will be tested to concentrations of 400, 300, 200, 90, 50, and 0 ppb. Start with
400 ppb and decrease.
Note: For 0 ppb, make sure to turn the ozone generator switch to ‘off’ and switch from ‘Auto’ to
‘Manual’ mode, or else sporadic ozone readings may result.
Note the response time of each instrument; it should obtain within 90% of the value within 5 to
10 minutes. Run each concentration for at least 30 minutes. At 0-ppb, the instrument should
within 1 or 2-ppb of the offset value that is set on the D/A board.
Record the number reached after 30 minutes; if not within at least 90% within 10 minutes,
disconnect monitor and troubleshoot for leaks or other possible problems.
Rule of Thumb
If low readings recorded, but linear or same percentage difference, it is likely to be a
solenoid problem.
If non-linear results recorded at high or low end, then the scrubber is bad.
1008-PC 400 300 (298) 200 90
1008-RS 370 281 186 82
% 92.5 94.2 93.0 91.1

38
With a new scrubber:
It is necessary to ‘condition’ the scrubber by having a high amount of ozone (400 ppb)
exposed to it for at least an hour. This will help the ozone monitor have a better response time
and a more accurate reading.
Performance checks for an ozone analyzer:
Turn on the ozone analyzer for an hour to warm up the UV lamp before performing the checks.
(1) SAMPLE FLOW CHECK
Make sure the pump is on and then tap the analyzer flow meter to make sure the float is
not stuck.
The flow meter should read about 2 Liters/minute.
Even though the instrument flow independent, flow should not be <1.5 L/min or >3.5
L/min.
The flow rate can be further validated using a flow meter that corrects for temperature
and pressure.
(2) SPAN CHECK
Turn the mode switch to SPAN.
Record the displayed value.
The digits must read 30.8 and the last two numbers dependent on what zero offset has
been set in the instrument. To see the thumbwheel setting, remove the cover and look at
the D/A Board.
(3) RECORDER SPAN CHECK
Turn the mode switch to SPAN.
Take a voltmeter, set it to VDC (select minimum value), and touch the Red lead to (+)
and the Black lead to (-) at the rear of the instrument.
The voltmeter should read 0.800V or 80% of full scale. If not, adjust to the proper value
by turning the “Analog Span” at the front of the instrument.
Check recorder output to see if it matches display.
Sometimes at the higher end, the output voltage may not match the display. For example,
one might see 0.400 on the display, but 0.396V at recorder terminal with a voltmeter. Use
the following procedure to adjust output voltage variation:
Move operator switch to “Span”. The value 30809 will appear if “zero” offset
thumbwheel on the D/A Board is set at ‘9’.
Adjust output voltage to 0.800V first.
Open the unit, and adjust the “zero” offset to “0”. Set the LSD thumbwheel to “400”.
Check voltage output to see how close it is to 0.400V. Adjust analog span pot on front
panel of monitor accordingly.
Adjust LSD thumbwheel to some other values like 2 or 3. It is better to adjust the span
pot on the upper end of the scale to improve the readings at the lower end.
Return the “Zero” offset to chosen preset value.

39
(4) ZERO CHECK
Set the mode switch to ZERO.
The front panel display should read 00.000
Take a voltmeter, set it to the minimum VDC range, and touch the Red lead to (+) and the
Black lead to (-).
The voltmeter should show 0V.
If not adjust, span pot on the right hand side of “D/A” Board.
(5) CONTROL FREQUENCY CHECK
Set the mode switch to CONT/PRESS.
Set the T/P switch to OFF.
Record the value. It should be 500 kHz, or very close to 50.000 on the display.
(6) SAMPLE FREQUENCY CHECK
Mode switch set to SAMP/TEMP.
T/P switch set to OFF.
The value should be above 35.000
(7) ADJUSTING LAMP FREQUENCY
Loosen the two screws at top right hand corner of instrument. Gently push the lamp
forward to increase frequency; pull out to decrease lamp frequency.
Note: Use a plastic pen or some other insulated tube to push or tug the lamp in or out of
the UV lamp housing. Do not pull the lamp out while instrument is on since UV is
harmful to the eyes.
If the lamp frequency does not change much after adjusting, try cleaning the optics tubes.
If value does not change much, then it may be time for a new UV lamp. It is
recommended that the lamp frequency not fall below 30 since this could generate a
noisier ozone reading.
(8) TEMPERATURE CHECK
Disconnect all gas lines from back panel. Ozone monitor must be warmed up (about an
hour).
Set mode switch to SAMP/TEMP.
T/P switch set to ON.
Analyzers PUMP switch set to OFF.
VALVE switch set to OFF.
A value will appear in Celsius.
The display should read about 30 C.
(9) PRESSURE CHECK
Disconnect all lines from back panel.
Mode switch set to CONT/PRESS.
Analyzers PUMP switch set to OFF.

40
Compare displayed value with a barometer or another electronic instrument (like ozone
monitor). The value on the ozone monitor is in Pascal. The value should be appropriate to
the area located. Weather websites can also provide a value.
(10) SYSTEM LEAK CHECK
Mode switch set to CONT/PRESS.
Analyzer PUMP switch set to ON.
VALVE switch set to ON.
Analyzer flow within an acceptable range (1.5 L/min to 3.5 L/min).
Plug the INLET with your finger. The flow should drop to zero within about a minute.
If it does not reach zero as indicated on the rotameter, there is a leak in the system.
Check internal plumbing connections to scrubber, valve, or other points. Check optics
tubes to see that each is screwed firmly and that seals in place if removed for cleaning.
Calibration of API- Teledyne ozone analyzers:
Connect one of the ozone outputs of 1008-PC to the sample port of the API Teledyne. Note:
Make sure each connection is firmly attached to each port for air flow.
The steps to be followed for calibration are:
The O3 span concentration is the concentration of the input gas. The ozone analyzer is
calibrated for 400, 300, 200, 100 and 0 ppb.

41
NOx analyzer
The NOx analyzer is setup for continuous monitoring of oxides of nitrogen during the ozone
season. The instrument is set for 5 minute averages. The data is downloaded twice a month
from the internal memory of the analyzer using TEI for windows. Hourly NOx concentrations
are calculated using the 5 minute averages.
Calibration of 42C NO-NOz-NOy Analyzer (trace Level)
Instruments required
42C NO-NOz-NOy Analyzer
146C Dynamic gas calibrator
The connections are made as shown in the figure below
PRE-CALIBRATION
Follow the steps below before calibrating the Model 42C Trace Level:
1. Be sure the ozonator is on. If the ozonator is not on, choose Instrument Controls
from the Main Menu. From the Instrument Controls menu choose Ozonator. Press the
ENTER pushbutton to turn the ozonator on. Press the RUN pushbutton to return to the
Run screen.

42
2. Allow the instrument to warm up and stabilize.
3. Be sure the instrument is in the auto mode, that is, NO, NO2, and NOx measurements are
being displayed on the front panel display. If the analyzer is not in the auto mode, choose
Instrument Controls from the Main Menu. From the Instrument Controls menu Choose
Auto/Manual Mode. Use the ↑ pushbutton to select auto mode (NO/NOx) and press
ENTER. Press the RUN pushbutton to return to the Run screen.
4. Select the NO, NO2, and NOx ranges and set the averaging time. It is recommended that
a higher averaging time be used for best results (around 300 secs). Choose “averaging
time” from the main menu, use ↑ arrow to increase it to 300 secs.
CALIBRATION
1. Introduce zero gas to the SAMPLE bulkhead at a pressure of around 30psi.
2. Allow the analyzer to sample zero air until stable NO, NO2, and NOx responses are
obtained. After the responses have stabilized (the readings should be stable at least for
one minute). Choose Calibration from the Main Menu then choose Calibrate Zero. The
Calibrate Zero screen displays the NO, NO2 and NOx readings. Press ENTER to set the
NO, NO2 and NOx readings to zero. The message “Saving Parameters(s)” is briefly
displayed to indicate that the background readings have been set to zero. The analog
outputs also go to zero. Press the RUN pushbutton to return to the Run screen.
3. Turn on the source of NO calibration gas of approximately 80% of the fullscale range and
a pressure of 20psi.
(146 C)
4. Step 3 can be performed with the help of the 146C Dynamic gas calibrator. Make sure
that the mode is on “Service Mode”. To calibrate go from a higher concentration to a
lower concentration of NO, this can be done by setting different spans in the 146C.
From the Main Menu
• Use the ↑ and ↓ pushbuttons to select Gas A (The channel to which NO is
connected). Press enter.
• Use ↓ to select span 1
• Select the “Conc ppm” and press enter
• Select “setting” and enter a value of .400 ppm. Press enter
Similarly different spans can be set to different percentages of concentration. The table
below can be a reference.

43
5. From the Run Menu
• Use → arrow to choose NO A, press enter
• Use ↓ and → arrows to select “Span 1”, press enter
• Press Run.
6. Allow the analyzer (42C) to sample the NO calibration gas until the NO and NOx
responses have stabilized. At least one minute of stable readings is required. (30 to 45
mins). Note down the readings of NO, NO2 and NOx.
7. After the responses have stabilized, choose Calibration from the Main Menu. From the
Main Menu choose Calibrate NO. The second line of the Calibrate NO screen displays
the current NO reading. The third line of the display is where the NO calibration gas
concentration is entered. Use the ← and → pushbuttons to move the cursor right and left
and use the ↑ and ↓ pushbuttons to increment and decrement each digit. (ex: For span 5
the NO channel should be set to 400 ppb.) Press ENTER to calibrate the NO channel to
the NO calibration gas. The message “Saving Parameter(s)” is briefly displayed to
indicate that the NO span coefficient has been calculated, stored, and is being used to
correct the NO reading.
8. Press the MENU pushbutton to return to the Calibration menu and choose Calibrate
NOx. Verify that the NOx calibration gas concentration is the same as the NO calibration
gas concentration plus any known NO2 impurity. Use the ← and → pushbuttons to
move the cursor right and left and use the ↑ and ↓ pushbuttons to increment and
decrement each digit. (Ex: For span 5 the NOx channel should be set to 400 ppb.) Press
ENTER to calibrate the NOx channel to the NOx calibration gas. The message “Saving
Parameter(s)” is briefly displayed to indicate that the NOx span coefficient has been
calculated, stored, and is being used to correct the NOx reading. Press the RUN
pushbutton to return to the Run screen.
9. Repeat Steps 5 through 8 for different spans and record the values
Span Name Concentration (ppb)
Span 5 400
Span 4 300
Span 3 200
Span 2 100
Span 1 50
Span 0 0

44
Table 1: Readings for the monitor with Sl No:
10. To measure the efficiency of the NO2-to-NO converter in the Model 42C Trace Level as
well as calibrate the NO2 channel of the analyzer, a known calibration source of NO2 is
required. We use a dynamic NO2 generation system such as the Model 146 generator for
this purpose.
11. We use the Gas Phase Titration (GPT) for the calibration of NO2.
(146C) Use the following steps to set the (GPT):
• Press “RUN” to enter the run screen.
• Use ↓ and ↑ pushbuttons to scroll to the ozone/perm line.
• Use → and ← pushbuttons to select the desired ozone level (in our case Use level
2)
Note: The concentration of ozone should be between 0.5 to 1 ppm, and level 2
generates a concentration of 0.730 ppm which is OK.
12. Allow the Model 42C Trace Level to sample the known NO2 concentration until the NO,
NO2, and NOx responses have stabilized. After the responses have stabilized, choose
Calibration from the Main Menu. From the Calibration menu choose Calibrate NO2.
The second line of the Calibrate NO2 screen displays the current NO2 reading. The third
line of the display is where the NO2 calibration gas concentration is entered. Set the
NO2 calibration gas concentration to the NO2 concentration. Use the ← and →
pushbuttons to move the cursor right and left and use the ↑ and ↓ pushbuttons to
increment and decrement each digit. Press ENTER to calibrate the NO2 channel to the
NO2 calibration gas. The message “Saving Parameter(s)” is briefly displayed to indicate
that the NO2 span coefficient has been calculated, stored, and is being used to correct the
NO2 reading.
13. The Model 42C Trace Level does a one point converter efficiency calculation,
corrects the NO2 reading for converter inefficiency and then adds the corrected NO2 to
the NO to give a corrected NOx signal.
14. It is important to realize that the converter efficiency correction is valid only when the
Model 42C Trace Level is in the automatic mode. If the Model 42C Trace Level is used
in the manual mode, the converter efficiency correction factor is interpreted as having a
value of 100%, and is used as such in concentration calculations.
Span Conc of NO
(ppb)
Flow NO NO2 NOx
Span 5 400 2000 390 -0.7 383
Span 4 300 2000 317 -13 304
Span 3 200 3000 198.2 -1.6 196.5
Span 2 100 3000 97.5 -2.1 95.4
Span 1 50 3870 49.0 -2.3 46.7
Span 0 0 3000 -0.3 -4.2 -4.5

45
Span Conc of NO
(ppb)
Flow NO NO2 NOx
Span 5 400 2000 6 441 447
Span 4 300 2000 1 320 321
Span 3 200 3000 0 212 212
Span 2 100 3000 -4 96.5 96.1
Span 1 50 3870 -0.6 43.8 43.2
Span 0 0 3000

46
References-Wind Speed/Wind Direction
Meteorological Monitoring Guidance for Regulatory Modeling Applications, EPA-454/R-99-
005, U.S. ENVIRONMENTAL PROTECTION AGENCY, Office of Air and Radiation
Office of Air Quality Planning and Standards, Research Triangle Park, NC 27711, February
2000
Model 03002 Wind Sentry, February 1999, P/N:03002-90, R.M. Young Company.
References-Enfora Modem
Enfora GSM1208 Quad-Band SA-G User Manual Revision 1.00, 06/03/04, Document
Control ID: GSM1208PB001MAN
Enfora Enabler-IIG GSM/GPRS Radio Modem AT Command Set Reference 1.02,
April 15, 2005, Document Control ID: GSM0107PB001MAN
Enfora Enabler II-G Quad Band GSM/GPRS Modem Integration Guide 1.02, 02/14/05,
Document Control ID: GSM0108PB001
Internal Application Note:GSM2308IAN0022 Using HyperTerminal to Send Text
Scripts to the Enfora L.P. Modem Revision 1.00, c2004.
Windows Hyperterminal help files.
Serial wiring diagrams: RS-232 - overview of RS-232 standard; http://www.hw-
server.com/rs232
References-General
Search Network Standard Operating Procedures, Revision 1, 07/31/02. Published online by
Atmospheric Research & Analysis, Inc. (http://www.atmospheric-research.com/)
Series 1008 U.V. Photometric Ozone Analyzer, Operating and Maintenance Manual, c1990,
Dasibi Environmetal Corporation.
Zeno 3200 User Manual, Version 2.02, 27 June 2003, P/N: 0302116012, Revision B, Coastal
Environmental Systems, Inc. (http://www.coastalenvironmental.com)
Instruction Manual Model 400E Ozone Analyzer, 04316, Revision C. August 22, 2005

48
Serial Cable for Zeno 3200 to Enfora GSM 1208 Modem

Site Operation Manual for a Typical Air Monitoring Site

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