Using a Zeno 3200

1
Using a Zeno 3200 Datalogger
By Don Marek, Lab Manager
Fall 2006
Texas A&M University-Kingsville
Department of Environmental Engineering
MSC 213
Kingsville, TX 78363
ENVIRONMENTAL ENGINEERING
MSC 213 KINGSVILLE, TEXAS 78363
(361) 593-3046 FAX (361) 593-2069

2
INTRODUCTION
This is an user’s guide to setting up a Zeno 3200 to read voltage levels from most ambient air
monitoring instrumentation and to set up an S1276Z air temperature and relative humidity sensor
and an RM Young Wind Sentry Model 03002. The standard 4-20mA current connection is
discussed.
The material reading a voltage output from an instrument and the 4-20mA can be applied to most
other instrumentation. The material for the other weather instrumentation may be similar, but
may require programming assistance from Coastal Environmental Systems since some
parameters could be different.
The channels for the wiring were chosen to maintain some separation of space between the
instrumentation so that it would be easier to wire. If changing the wiring location of an input,
make sure to change the program to conform to the physical point of the input. When
troubleshooting, check the wiring first, and then the programming
Refer to the Zeno 3200 manual for more details or call Coast Environmental technical support
for further guidance in resolving the issue.

3
TABLE OF CONTENTS
COMMUNICATING WITH THE ZENO...................................................................................... 4
DOWNLOADING DATA FROM THE ZENO............................................................................. 5
UPLOADING A CONFIGURATION TO THE ZENO 3200........................................................ 6
RETRIEVING ZENO SETTINGS................................................................................................. 6
FLASH MEMORY ERRORS ....................................................................................................... 7
HOW TO TROUBLESHOOT A CHANNEL FOR VOLTAGE INPUT ...................................... 8
BUILDING A ZENO SERIAL CABLE......................................................................................... 9
INSTALLING AN RM YOUNG WIND SPEED AND WIND DIRECTION SENSOR MODEL
03002 WIND SENTRY................................................................................................................ 10
R.M. YOUNG 03002 WIND SENTRY ....................................................................................... 13
MAGNETIC DECLINATION ..................................................................................................... 15
PROGRAMMING A ZENO 3200 TO OPERATE WITH A S1276Z AIR
TEMPERATURE/RELATIVE HUMIDITY SENSOR ............................................................... 17
PROGRAMMING A ZENO 3200 TO READ VOLTAGE LEVELS FROM A DASIBI OZONE
MONITOR.................................................................................................................................... 22
WIRING A 4-20MA SENSOR..................................................................................................... 24
CONTROLLING AN 12V RELAY............................................................................................. 30
TROUBLESHOOTING A PROBLEM........................................................................................ 31
EQUIPMENT VENDORS............................................................................................................ 32
REFERENCES ............................................................................................................................. 33
READING RESISTOR COLOR CODES.................................................................................... 34

4
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 to serial converter apparatus if necessary.
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 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

5
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 onscreen instructions and make sure the files are available before installing.
Find it by doing the following:
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.

6
CALIBRATING THE TEMPERATURE (page 77 of Zeno manual)
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, when prompted enter the
temperature as either 70F or 21.1C. Checking this parameter at least monthly will help the Zeno
maintain a more accurate time value.
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 if it has been connected to a network
unless it matches. The computer, whether it is a laptop or desktop, will set its time with the
university's 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; check with time.gov to
determine whether this is the case.
UPLOADING A CONFIGURATION TO THE ZENO 3200
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).

7
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!
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.

8
HOW TO TROUBLESHOOT A CHANNEL FOR VOLTAGE INPUT
Obtain an adjustable DC Power supply that is capable of output up to 5V. A couple of alkaline
batteries like AA, C’s, D’s can also work as well.
If the channel is a single-ended connection, 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. If recording a voltage with a differential connection, attach the “+” to “+”
on the datalogger and “-“ to “-“ to the datalogger.
Check the output voltage of the power supply with a digital voltmeter. 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. 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.
The following figure shows a differential connection to Channels +1 and –1 from Instrument #1;
single ended inputs from Instrument #2 and Instrument #3 to Channels –6 and +6.

9
BUILDING A ZENO SERIAL CABLE
Parts required: (2) Shielded Metal D-Sub Connector Hood Model: 276-1508-Catalog #: 276-
1508, (2) 9-Position Female Solder D-Sub Connector Catalog#: 276-1538, 2 to 4 feet of
multiconductor shielded cable 22 to 24 gauge with at least 5 wires available.
Solder the connections as indicated in the above diagrams. Wire color not as important as
connections being correct for the application.

10
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, 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: Wiring the RM Young wind speed/wind direction sensor.

11
Figure: Wiring diagram for RM Young 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:
Figure: 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.

12
Programming the Zeno 3200 for Operation with the Wind Sentry
Follow the procedure for uploading to a Zeno 3200 that is explained elsewhere in this document.
Copy the text below into a text editor such as Windows Notepad or a word processor and make
sure to save it as a text file. This particular file configuration was created with the help of Coastal
Environmental Systems technical support. Channels +1 and +2 were set up to receive a voltage
signal from an ozone monitor of up to 5V. Channel +8 is used for the Wind Direction and
Channel 10 for the wind speed. This file utilizes the wind vector averaging that is built into the
datalogger. If entering the fields manually, make sure to go to the backdoor menu after entering
the other settings by pressing “B” and type the administrator’s password (default password is
‘zeno’). Modify the delay time to 15 milliseconds.
The samples are recorded into a 5 minute averages. Refer to the Zeno 3200 manual for more
information on modifying this setup file.
When converting the wind speed and wind direction to 1-hour averages, the data will have to be
processed through a vector averaging process. The wind speed/wind direction vector is broken
apart into its respective x-y components, averaged, and then calculated back into a 1-hour
average.
* Zeno 3200 System Setup File
* Program Version And Date: ZENO-3200 using ZENOSOFT V2.02 Sep 10 2002
11:29:41 CS B97B
* (C)opyright 1995-2002, Coastal Environmental Systems, Seattle, WA, USA.
* Setup File Date And Time: 04/06/17 11:37:28
PARAM1 300 0 300 2 3 4 0 0 9600 9600
PARAM2 9600 0 0 0 0 1 1 0 0 0
PARAM3 16777 0 60 18 0 0 0 0 2 2
PARAM4 2 2 0 0 0 3276769 0 -1 5 0
PARAM5 3 0 0 0 100 0 0 0 0 0
PARAM6 0 0 0 1059577200 50336144 151 196608 0 1 0
PARAM7 151 0 1280 0 10000 -1 -1 0 10 1
PARAM8 42 0 0 0 0 0 0 0 0 0
PARAM9 0 0 0 0 0 0 5 0 0 0
PARAM10 500 0 0 0 1200 -1 27
PARAM11 "NONE" "NONE" "NONE" "NONE" "NONE" "NONE" "" "ZENO" "" "NONE"
PARAM12 "" "ZENO-3200-Reset" "Real-Time-Clock-Suspect" "Logging-Memory-
Initialized" "Serial-Sensor-COM-Failure" "EEPROM-Suspect" "18-Bit-ADC-
Suspect" "12-Bit-ADC-Suspect" "Temperature-Clock-Adjustment" ""
PARAM13 "" "" "" "" "" "" "" "" "" ""
PARAM14 "" "" "" "" "" "" "" "" "" ""
PARAM15 "" "" ""
REPEAT1 -1 -1 -1 -1 -1 -1 -1 -1
CONSTANT1 0 0 0 0 0 0 0 0 0 0
CONSTANT2 0 0 0 0 0 0 0 0 0 0
GSI 1 NO_COMMAND
SENSOR 7 "WSPD" 14 0 0 0 0 0 0 1 0 1 0 1.677 0 0 0 0 0 0 0 0 0 0 S0.1
SENSOR 1 "WDIR" 0 0 0 0 2 5 0 1 0 2 0 140.8 0 0 0 0 0 0 0 0 0 0 S0.1

13
PROCESS 5 2 "WSPD" S1.1 0.4
PROCESS 5 13 "WSPD" S1.1 S1.1 S1.1 P1.1
PROCESS 2 1 "" P2.1 S2.1 S0.1 4
DATA 9 1 "WSPD" P3.1 1 6 7 P1.1 P1.1 P1.1
DATA 9 1 "WDIR" P3.2 0 6 7 P1.1 P1.1 P1.1
* !!SYSTEM TRANSFER COMPLETE.
* Turn Off File Capture Now.
* Enter Any Key To Continue.
EOF
R.M. YOUNG 03002 WIND SENTRY
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.
Settings for Wind Speed
Item 1: Sensor Type code = 7 (Digital Freq., f<10kHz) c1/7
Item 2: Sensor Name = wndspd c2/WSPD
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.

14
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
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.

15
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
-
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.
Magnetic Declination
From the National Geophysical Data Center:
http://www.ngdc.noaa.gov/seg/geomag/declination.shtml
“Magnetic declination, sometimes called magnetic variation, is the angle between magnetic north
and true north. Declination is considered positive east of true north and negative when west.”
Click the link to the NGDC and enter the site’s Latitude and Longitude.
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.
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.

16
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.
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.
Recommended 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

17
PROGRAMMING A ZENO 3200 TO OPERATE WITH 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: Wiring diagram S1276Z Temperature/Relative Humidity sensor.
Figure: Picture of a connected S1276Z Temperature/Relative Humidity sensor.

18
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
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 17: No. of Additonal 15-msec Delays 0 DEFAULT
PROCESS MENU

19
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.
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
.

20
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.
This file here is the configuration file to read the temperature in degrees Celsius and the relative
humidity percentage was prepared by Coastal Environmental technical support. If a Fahrenheit
temperature scale or another scale is required, setup an extra step under the process menu to
convert the Celsius to another temperature scale.
11:29:41 CS B97B
PARAM1 30 0 30 2 3 4 0 0 9600 9600
PARAM2 9600 0 0 0 0 1 1 0 0 0
PARAM3 16777 0 60 18 0 0 0 0 2 2
PARAM4 2 2 0 0 0 3276800 0 -1 5 0
PARAM5 3 0 0 0 100 0 0 0 0 0
PARAM6 0 0 0 1059562800 50336144 151 196608 0 1 0
PARAM7 151 0 1280 0 10000 -1 -1 0 10 1
PARAM8 42 0 0 0 0 0 0 0 0 0
PARAM9 0 0 0 0 0 0 5 0 0 0
PARAM10 0 0 0 0 1200 -1 27
PARAM13 "" "" "" "" "" "" "" "" "" ""
PARAM14 "" "" "" "" "" "" "" "" "" ""
PARAM15 "" "" ""
REPEAT1 -1 -1 -1 -1 -1 -1 -1 -1
CONSTANT1 0 100 0 0 0 0 0 0 0 0
CONSTANT2 0 0 0 0 0 0 0 0 0 0
GSI 1 NO_COMMAND
SENSOR 2 "AirTemp" 12 0 2 0 2 0 0 1 0 2 0 0.4 0 0 0 0 0 0 0 0 0 0 S0.1
SENSOR 2 "RelHum" 5 0 1 4 0 0 1 1 0 2 0 100 0 0 0 0 0 0 0 0 0 0 S0.1
PROCESS 4 1 "AT_CALC" S1.1 0.001288 0.0002356 9.557e-08 4990 50 -40 12
PROCESS 1 2 "RH_AVG" S2.1
PROCESS 5 2 "RH_CALC" P1.1 -100
PROCESS 5 13 "RH_SEL" P3.1 P2.1 P2.1 C2

21
DATA 9 1 "AirTemp" P1.1 1 4 7 P1.1 P1.1 P1.1
DATA 9 1 "RelHum" P4.1 0 3 4 P1.1 P1.1 P1.1
EOF
If in Adobe PDF reader, use the “Select Text” tool to highlight the text, copy it, and paste into
Notepad.
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.

22
PROGRAMMING A ZENO 3200 TO READ VOLTAGE LEVELS FROM A DASIBI
OZONE MONITOR
The maximum voltage a Zeno 3200 is capable of reading is 5V. For ambient air monitoring
applications with a Dasibi 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 a brief periods of time.
If the ozone concentration is at 0.040 ppm on the LED readout, 0.040V will output to the
datalogger. If the ozone concentration is at 125 ppb, or 0.125ppm, the datalogger will record an
output of 0.125V.
Appendix C in the manual shows a voltage divider circuit that is NOT necessary for attaching the
Dasibi ozone monitor. Simply attach a red wire from the (+) of the ozone monitor to Channel +1
or Channel –1 of the Zeno 3200; next, attach a black wire from the (-) of the ozone monitor to
the “GND” of the Zeno 3200 datalogger.
Here is the configuration file for recording the voltage level from Channel +1 and Channel +2 to
the Zeno 3200:
11:29:41 CS B97B
PARAM1 300 0 300 2 3 4 0 0 9600 9600
PARAM2 9600 0 0 0 0 1 1 0 0 0
PARAM3 16777 0 60 18 0 0 0 0 2 2
PARAM4 2 2 0 0 0 3276836 0 -1 5 0
PARAM5 3 0 0 0 100 0 0 0 0 0
PARAM6 0 0 0 1059577200 50336144 151 196608 0 1 0
PARAM7 151 0 1280 0 10000 -1 -1 0 10 1
PARAM8 42 0 0 0 0 0 0 0 0 0
PARAM9 0 0 0 0 0 0 5 0 0 0
PARAM10 0 0 0 0 1200 -1 27
PARAM13 "" "" "" "" "" "" "" "" "" ""
PARAM14 "" "" "" "" "" "" "" "" "" ""
PARAM15 "" "" ""
REPEAT1 -1 -1 -1 -1 -1 -1 -1 -1
CONSTANT1 0 100 0 0 0 0 0 0 0 0
CONSTANT2 0 0 0 0 0 0 0 0 0 0
GSI 1 NO_COMMAND
SENSOR 2 "OZONE" 1 0 3 0 0 0 0 1 0 2 0 1 0 0 0 0 0 0 0 0 0 0 S0.1
SENSOR 2 "Ozone2" 2 0 3 0 0 0 0 1 0 2 0 1 0 0 0 0 0 0 0 0 0 0 S0.1

23
PROCESS 1 2 "OZONE" S1.1
PROCESS 1 2 "OZONE2" S2.1
DATA 9 1 "OZONE" P1.1 3 6 8 P1.1 P1.1 P1.1
DATA 9 1 "OZONE-2" P2.1 3 6 8 P1.1 P1.1 P1.1
EOF

24
WIRING A 4-20MA SENSOR
Connecting a 4-20mA pH and Conductivity Probe to a Zeno Datalogger
This is how to install a WQ201 pH Sensor from Global Water Instrumentation
(http://www.globalw.com/) The job is similar for the WQ301 Conductivity Sensor (0-10000
Micro Siemens (micro mhos per cm).
Tools and Materials: Screwdriver, wire strippers, some additional short pieces of wire of similar
gauge to probes, high tolerance resistor from Coastal Environmental (25.0Ω, .1%, current sense
resistor for 4 - 20 mA applications (CES P/N 1008Z) ). Any resistor from Radio Shack with
lower tolerances will not work.
Each of these is a 4-20mA sensor, so each one will take up a “+” and a “-“ on the Zeno 3200
datalogger. So, only a maximum of seven 4-20mA can be wired to a Zeno.
1. Begin by placing the resistor across a chosen channel. A resistor has no polarity, so it
does not matter which way it is installed. In this case, let us start with Channel 7. Each
probe has a red wire, white wire, and a black wire.
2. Connect the red wire to the 12 V SW’D terminal (upper right hand terminal). If choosing
a terminal other than Channel 7, it may be necessary to strip some wire off of the cable
so the terminal can be reached or twist an additional length of wire.
3. Connect the white wire to the “+” terminal of Channel 7. Connect the black wire to the
“-“ terminal. Another piece of wire of similar gauge needs to be connected from the “-“
terminal to any of the “GND” terminals on the Zeno 3200.
After wiring, the next step is to program the Zeno 3200 to record the pH or conductivity values
properly and calibrate the sensor.
Programming the Zeno 3200
Make sure the Zeno 3200 is beginning with a blank slate under the Zeno Program Menu. Refer
to the Zeno manual for clearing the sensor records, process records, and data records. The
following pages show exactly what to enter after wiring the probe to the datalogger.
The section after describes how to calibrate the pH sensor and enter the proper values.

25
SENSOR MENU
Item 1: Sensor Type code = 3 c1/3
Item 2: Sensor Name = current c2/current
Item 4: Analog Channel Gain = 1 DEFAULT
Item 5: Analog Channel Attenuation = 1 DEFAULT
Item 6: Switched Power code = 31
C6/31
Item 7: Sensor Excitation Voltage = 0 DEFAULT
Item 8: Switched Excitation Return Code = 0 DEFAULT
Item 9: Sensor Warm up Time = 3 C9/3
Item 14: Conversion Coefficient B = 402
c14/402
Item 16: Retry Count = N/A N/A
1 12V or higher is required for these sensors.
2 Gives result in mA for nominal 25.0Ω resistor. for maximum accuracy, use value of 1000/R
where R is the measured resistance of the current sense resistor from the resistor calibration data.
Notes: Item 9: Sensor warm-up time obtained from product manual.
PROCESSING MENU
Item 1: Process Category code = 1 (general) c1/1
Item 2: Process Type code = 1 (immediate) c2/1
Item 3: User-defined Process Name = 3 : Current c3/Current
Item 4: Sensor Input Channel = S1.13
current c3/S1.13
-
3200. To output multiple values, repeat this menu as required. You can also refer directly to the
sensor outputs, rather than going through a process. In this case, enter S1.1 (for example to
obtain the value output by the 1st
defined sensor.
Notes: This process will simply display a current value from the sensors.

26
DATA OUTPUT MENU
Item 3: Field Name = cur c3/cur
Item 4: Data Process Record = P1.14
c4/P1.14
Item 5: Field Precision = 1 c5/1
Item 7: Data Storage Class Code = 8 : Compressed Float c7/8
-
3200. To output multiple values, repeat this menu as required. You can also refer directly to the
sensor outputs, rather than going through a process. In this case, enter S1.1 (for example to
obtain the value output by the 1st
defined sensor.
Note: If another process is setup, it is possible to record both a current value and corresponding
pH value for troubleshooting.

27
Wiring Connections for 4 - 20 mA current loop interface:
1. 4 - wire sensor
2. 3 – Wire Sensor
Coastal Environmental Systems (CES) supplies a precision, low temperature coefficient, 25.0Ω,
.1%, current sense resistor for 4 - 20 mA applications (CES P/N 1008Z). Sensor and resistor
leads should be twisted together and soldered or crimped together in a crimp ferrule prior to
connection into terminal block to provide a proper Kelvin connection.
After entering, make sure to save all of the setting by selecting (E) Save Parameters To
EEPROM.
Testing the Sensor
Since the pH and Conductivity are three-wire sensors, #2 is the appropriate way to wire the
probes. To see if value in real time, select the (T) Test Menu Option from the User
Menu. Select the option (Sx,y) Display Sensors x-y SCALED Data
To view the data as it is being read. If the value “10000” appears, give it a few cycles or press
“ESC” on the computer and try again until a reasonable number appears to be displayed.
If everything is wired and functioning correctly, a value should appear that is the current value.
Another way to check whether the value is good is to wire the probe to a power supply and

28
voltmeter as shown in the wiring diagrams of the probes manual and determine whether the
current values are in close proximity of each other for the buffer that is tested.
It may be necessary to change the sampling time to perhaps 20 or 30 seconds under the Sampling
Period Menu located at the User Menu (the first one appearing when initially logging into the
Zeno 3200).
Calibrating the pH Probe (summary from the manual)
After is determined that the pH probe is returning a current reading, the next step is to calibrate
it. A pH buffer of 4 and a pH buffer of 10 will be required. Fill a container with the pH 4 buffer
and set the probe into the solution. Remember to remove the plastic storage cap.
Let the sensor read the current value for 5 minutes and then record. Call it “W.”
For this example, it was found that W=8.1 mA when the probe is set into a pH 4 buffer. Rinse
the probe with DI water and place into a pH 10 buffer and leave for about 5 minutes. Record the
value. For a pH of 10, the current reading was X=14.9 mA.
The rest of the arithemetic is as follows:
C = X – W = 14.9 – 8.1 = 6.8 (Step 7)
B = X – (C/6)(10) = 14.9 – (6.8/6)(10) = 3.6 (Step 8)
The value 3.6 is the low current value if the pH were 0.
The high current value is B + 14(6.3/6) = 19.5 (Step 10). If the pH were 14, 19.5 mA is expected
current value.
The final calculation is to convert the current value into pH value that can be recorded by the
datalogger.
In the case of linear sensor, to calculate B (A1) and C(A0), you need to know the following
values:
1. The output current range of the sensor, vmin to vmax.
2. The corresponding range in engineering units (pH or conductivity), xmin to xmax.
The slope B(A1) is given by the equation:
The offset C(A0) is given by the equation:
After substituting the numbers, (14-0)/(19.5-3.6), B works out to

29
0.88. The value for C works out to [(0*19.5)-(14)(3.6)]/15.9 = -3.17. Enter these values in to the
process record. Remember that the sensor needs to be checked at least once a month, so these
values could drift over time. After entering, make sure to save the parameters to EEPROM or
else if power loss occurs, the changes will be lost.
PROCESSING MENU
Item 1: Process Category code = 1 (general) c1/1
Item 2: Process Type code = 1 (immediate) c2/1
Item 3: User-defined Process Name = 3 : pH c3/pH
Item 4: Input for Data (X) = S1.13
current c3/S1.13
Item 5: A2 Coefficient 0 C5/0
Item 6: A1 Coefficient 0.88 C6/0.88
Item 7: A0 Coefficient -3.17 C7/-3.17
Calibrating the Conductivity Sensor
Fill a container with DI water and another with 5000 uS solution (or some concentration
significantly higher than zero). Record a current value for the DI water and another for the higher
concentration solution. Calculate like the pH but substitute appropriate values for the
conductivity solution and DI water.
References
1. Manual: Global Water Instrumentation, Inc.,11390 Amalgam Way,Gold River, CA
95670,T: 800-876-1172,Int’l: (916) 638-3429, F: (916) 638-3270,Temperature Sensor:
WQ101, pH Sensor: WQ201,Conductivity Sensor: WQ301, Dissolved Oxygen
Sensor: WQ401, ORP/Redox: WQ600, Web: http://www.globalw.com/
2. Manual: 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, Web:
http://www.coastalenvironmental.com/

30
CONTROLLING AN 12V RELAY
The Zeno 3200 Datalogger has three terminals available that provide 12V DC to power a device
or control a relay. The relay can be purchased from Radioshack for less than $10 and control
either an AC device or another DC powered device.
Radio Shack part #275-218 DPDT relay. Here is a picture of how to wire. The red and black
wires from bottom pins (7 and 8) come from the Zeno; the red from the switched A, B, or C
connection depending which one is for activation. The black wire goes to ground (on the Zeno).
The polarity to activate the relay does not matter.
The black and white wires for pins 3 to 5 (and 1 to 5) and pins 4 to 6 (and 2 to 6) are for
completing the circuit when the relay is activated.
For more information, see this website: http://home.bendcable.com/werstlein/

31
TROUBLESHOOTING A PROBLEM
Electrical and software problems can be solved with a little knowledge of an experimental setup.
Most troubleshooting will consists of either an On/Off scenario. Either the equipment is on and
works or it does not. Here are some questions to ask while trying to solve a problem:
1. Is power reaching the datalogger?
2. If power is reaching the datalogger, are the electrical requirements (voltage, current) for
the instruments being met?
3. Is the device powered from the 5V or 12V switched terminals on the datalogger, or an
external supply?
4. If so, is the power to the device switched on in the software setup edited in the Zeno?
5. Once power requirements are met, is the wiring correct?
6. Does the instrument have any external ways to check whether it is functioning? For
example, the wind speed/wind direction sensor has wiring that can be detached and a
simple resistance test provides some information on whether it should function.

32
EQUIPMENT VENDORS
Wind Speed and Wind Direction (Wind Sentry Model 03002)
R. M. Young Company
2801 Aero Park Drive
Traverse City, Michigan 49686
Phone: 231-946-3980
Fax: 231-946-4772
http://www.youngusa.com/
Multiconductor Cable (8/C #22 AWG, Belden 9944)
Corpus Christi Electric
2323 Leopard Street
Corpus Christi, TX 78408
Phone: 361-882-2564
Fax: 361-882-8318
http://www.cc-electric.com/
Sell wire, electrical parts. Contact counter sales.
Teflon tubing:
Texloc Limited
4700 Lonestar Blvd
Ft. Worth, TX 76106
Phone: 1-800-423-6551
Fax: 1-800-438-9562
PTFE: 1/8” ID X ¼”OD (about 0.062 Wall) Good enough for sampling.
PTFE: 5/32” ID X ¼”OD (about 0.050 Wall) Used inside the Dasibi monitors.
PTFE will be more opaque which is okay. PTFE stand for Polytetrafluoroethylene.
PH and Conductivity Probes
Global Water Instrumentation, Inc.
11390 Amalgam Way
Gold River, CA 95670
T: 800-876-1172,Int’l: (916) 638-3429
F: (916) 638-3270

33
REFERENCES
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.
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. (www.coastalenvironmental.com)

34
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.

Using a Zeno 3200

Recommended

Recommended

More Related Content

Viewers also liked

Viewers also liked (18)

Similar to Using a Zeno 3200

Similar to Using a Zeno 3200 (20)

More from TAMUK

More from TAMUK (20)

Recently uploaded

Recently uploaded (20)

Using a Zeno 3200