Southland EMD-570 User manual

EMD-570
Trace Oxygen Transmitter
4045 E. Guasti Rd. #203
Ontario, CA 91761 USA
Ph: 1-949-398-2879
Fax: [phone]
Email: [email protected]
EMD-570 Manual Rev 1.1 12_2014
Instruction Manual

Table of Contents
Part 1 Introduction
Part 2 Installation
Part 3 Operation
Part 5 Annexures
Part 4 Maintenance
1.1 General Introduction
1.2 Principle of Operation - e Oxygen Sensor
1.3 EMD-570 Specications
2.1 Receiving Your New Oxygen Transmitter
2.2 Mounting & Electrical Connections
2.3 Gas Connections
2.4 Installing the Oxygen Sensor
3.1 Understanding the Controls and eir Operation
3.2 Manual Range Output Adjustment
3.3 Analog Output 4 - 20mA
3.4 Optional 0 - 1V DC Analog Output
4.1 Span Calibration, using Ambient Air
4.2 Span Calibration, using Certied Span Gas
4.3 Procedure for Replacing the Sensor
4.4 Troubleshooting
5.1 Spare Parts List
5.2 Warranty
5.3 Material Safety Data Sheets
5.4 Conformance Certicate

Part 1 Introduction
1.1 General Introduction
e Southland Sensing EMD-570 Trace Oxygen Transmitter is a microprocessor based online unit de-
signed for continous measurements in a variety of applications and gas mixtures.
e transmitter was designed with the customer in mind keeping the operations simple, while still fea-
turing a fast response and rugged design. Every eort has been made to use modern industrial compo-
nents and materials which has resulted in an advanced design, excellent performance and an overall low
cost of ownership.
Southland Sensing Ltd. appreciates your business and recommends to read through the complete manu-
al to be able to get the full experience from your new ppm oxygen transmitter.
1.2 Principle of Operation - e Oxygen Sensor
e precision electrochemical oxygen sensor used in the EMD-570 is designed and manufactured by
Southland Sensing Ltd under a strict quality proceedure.
To understand how the oxygen transmitter functions, it is important to understand a little bit of the sen-
sor characteristics.
e active components in the precision electrochemical oxygen sensor is the anode, cathode and aque-
ous electrolyte which is all housed in a cell body. e oxygen molecules in the application pass through
the front sensing membrane. A chemical reaction occurs and a raw electrical current is generated.
is electrical current is proportional to the amount of oxygen in the application. e analyzer than
processes this raw electronic signal, compensates for temperature and barometric pressure variations
and converts the data into a parts-per-million or percent oxygen measurement value.
Once the data is displayed in real time on the full backlite display, the user can automate the control of
their process using the standard 4 - 20mA analog output signal which can be run to a PLC or other type
of DCS System. e EMD-570 also has the option of a 0 - 1V DC analog output - consult factory if this
output is prefered.
Precision Electrochemical Oxygen Sensor

Part 1 Introduction
1.3 EMD-570 Specications
EMD-570 Trace Oxygen Transmitter
Precision Electrochemical Sensor Technology
Backlight Display w/ Auto-Range
5 Standard Analysis Ranges
4-20mA and 0 - 1VDC are Range Locked
Compact In-Line Packaging, Small Footprint
Specications:
Ranges: 0 - 10/100/1000ppm/1%/25%
Accuracy: +/- 2% Full Scale Range*
Display: Graphical w/ Backlight
Dimensions: 3” x 5”
Enclosure: Nylon Top & SS Housing
Classication: General Purpose
Temperature: 0 - 50 deg C
Power: 12 - 24 VDC
Signal Output: 4 - 20mA or 0 - 1VDC
Response time: T90 in 10 Seconds
Sensor: TO2-1x Trace Oxygen
Sensor Life: 17—24 months
Calibration: Periodically
Temperature Compensation: Integral
Flow Sensitivity: 1 - 4 SCFH
Flow Cell: 1/8” Compression
Warranty: 9 Months Sensor
Warranty: 12 Months Electronics
*Accuracy at constant conditions
Optional Accessories:
• Optional Ranges: Fully Customizable from Factory
• Flow Through Sensor Housing 1/4” Compression
• TO2-2x Oxygen Sensor with > 0.5% CO2 Present
Applications:
“Inquiry for Application Expertise”
• Inert Glove Box Systems
• Nitrogen and O2 PSA Generators
• Laboratories & Universities
• Beverage Grade CO2 Monitoring
• Air Separation Plants
& Many Others

Part 2 Installation
2.1 Receiving your New Oxygen Transmitter
As soon as you receive your new Trace Oxygen Transmitter, carefully unpack the unit and accessories and
inspect the electronics module, sensor housing for damage and also verify the oxygen sensor is present.
CAUTION: Do not open the oxygen sensor packaging at this time. It is packed
in a Nitrogen purged bag and will be damaged if left exposed to ambient air for a prolonged
periodoftime. Itisrecommendedthatyoureadthroughtheinstruction manualinstallation
andoperationsectionsbeforeattemptingtoopenthebagtheoxygensensorispackedin. For
questions, please contact the factory.
If damage to any portion of the new analyzer is present, stop and report damage to the shipping company
as well as the factory.
e analyzer is shipped with all materials needed to install and prepare the system for operation. In some
instances, added sample system components are necessary to condition the gas sample before entering
the sensor housing. Southland Sensing oers free application consultation, and we encourage you to take
advantage of our engineers and their expertise.
It is also important to be mindful of EMI / RFI noise interference. Protection from EMI / RFI noise is im-
portant for accurate readings.

Part 2 Installation
2.2 Mounting the Oxygen Transmitter
e EMD-570 is designed as a general purpose device. For eld installations, consider mounting in a
NEMA4X or IP66 enclosure for added protection against the elements.
Refer to part 3 operation section of this instruction manual for more information on how to operate the
controls of this oxygen transmitter.
Refer to part 4 maintenance section for an overview on how to calibrate the device using a certied span
gas or ambient air.
A precision electrochemical oxygen sensor is included as a separate item and must be installed prior to
instrument use.
CAUTION: Do not open the N2 lled oxygen sensor bag until you have thoroughly read the instruction
manual and have made all gas and electrical connections. Please refer to section 2.6 or 2.7 to reference
installing the oxygen sensor into the sensor housing as well as section 4.1 and 4.2 on SPAN Calibration.
When installing the device, it is important to make sure the bottom portion of the sensor housing, which
is manufactured from stainless steel is mounted at and the top portion of the sensor housing with built-
in electronics which is manufactured of black nylon is at the top. is will insure that the sensor is always
face down (screen side down, circuit board facing up). is will allow any air bubbles to rise to the top and
not interfer from the sensing membrane.
Oxygen Sensor Front and Rear View
CAUTION: Make sure plug is all the way in before a volt-
age is applied. Plugging in Connector with a 12 - 24V DC
power connected can short out the 4 - 20mA output.
e supplied cable has 4 internal wires which should be
connected as follows:
red wire = (+) 12 - 24V DC
black wire = (-) 12 - 24V DC
Yellow wire = (+) 4 - 20mA
Green wire = (-) 4 - 20mA
2x 1/8”
Swagelok
Fittings
2x 8-32
UNC
1.375 in.
34.92 mm
2.526 in.
64.15mm
4.530 in.
115.10mm

Part 2 Installation
2.3 Gas Connections
e EMD-570 with its standard ow through housing is designed for positive pressure samples and requires
incoming sample lines. e user is responsible for added sample system components as well as sourcing a
calibration gas (although you may use ambient air as your calibration gas).
It is recommended to use Stainless Steel Tubing or a low permeable plastic tubing.
• Flow rate should be between 0.5 - 3 SCFH
• Inlet pressure should be between 5 - 60 PSIG
• Analyzer should be vented to atmosphere, take precau-
tion to make sure vent does not get blocked
1
2
3
4
1 Sample Gas Inlet, goes into Flow Valve
2. Bypass valve, allows user to isolate sensor during shutdown
3. EMD-570 Transmitter with Flow rough Housing
4. Flow Meter, Vent to Atmosphere
Recommended Sample System
2.4 Installing the Oxygen Sensor
CAUTION: Prior to installing the oxygen sensor. Read section 4.1 or 4.2 on performing a span calibration.
e EMD-570 can accept either a TO2-1x or TO2-2x (CO2 Applications) trace oxygen sensor. For proper selection
with your application, please view our online application guide or contact your local sales rep.
Prior to installing the sensor, it is important to make sure that the analyzer gas lines are hooked up and the unit is
ready to purge with a zero gas. Connect the zero gas line and set your ow between 0.5 - 3.0 SCFH.
To Install the Sensor:
- Remove the upper electronics housing by unscrewing the stainless steel collar.
- Inspect O’ring for cracking, replace if necessary. Always lube your Orings!
- Remove the sensor from its box. With scissors, open nitrogen purged packaging
and remove the sensor.
- Visually inspect sensor for damage, if damaged notify the factory immediately.
- Remove the shorting pins across the back of the sensor board contacts.
- Place the sensor inside the upper housing with the metal screen mesh facing down
and the circuit board contacts facing up.
- Return upper portion of the device to the stainless steel bottom. Tighten
collar. Hand tight is acceptable to create an airtight seal.
- Immediately start purge of zero gas.
- If the analyzer has not been calibrated, refer to section 4.1 or 4.2 for more information.
** Sensor should be exposed to ambient air for no more than 2 minutes. Extended periods of exposure can damage the low
end sensitivity and response time.

Part 3 Operation
3.1 Understanding the Controls and their Operation
e EMD-570 Trace Oxygen Transmitter is an economical method to measure trace oxygen. e key
attributes to the unit is its easy to use interface. ere is only 1 span knob to adjust which is necessary
for periodic calibration (see section 4.1 and 4.2 for more information on calibration proceedures).
All features are preset from the factory, small adjustments to the output and output range can be made
by the user. Contact the factory for more details on what settings are congurable in the eld. e
Display of the analyzer is pre-congured with 5 ranges and is setup to auto-range. e ranges include
0 - 10ppm, 0 - 100ppm, 0 - 1000ppm, 0 -1% and 0 - 25%. e 4 -20mA analog output (and optional 0 -
1V DC analog output) are manually set via a short on the PCB to a selected range.
Preset from the factory the 4 - 20mA analog ouptut range is 0 - 100ppm unless otherwise specied. It
is possible to manually change the locked range in the eld.
e unit is congured with a single span knob. is span knob allows for air calibration or span cali-
bration and is recommended every 2 - 3 months or as your process dictates.

Part 3 Operation
3.2 Manual Range Output Adjustment
e EMD-570 is precongured from the factory with a single manual range for the analog output.
Without specifying, the transmitter is preset to 0 - 100ppm. It can be set to any of the 5 ranges:
Range 1 0 - 10 ppm
Range 2 0 - 100 ppm
Range 3 0 - 1000 ppm
Range 4 0 - 1%
Range 5 0 - 25%
If the user wishes to adjust the analog output range, the user will need to re-
move the front panel overlay (2 screws on either side of the display and the nut
over the span knob). Once removed, the user will need to use a soldering iron, re-
move the solder pad (shorting) from the current range, and re-solder to a new range.

Part 3 Operation
3.3 Analog Output 4 - 20mA
** Caution: Integral 4 - 20mA converters are internally powered and do not require ex-
ternal power. DO NOT supply any voltage across these terminals as the 4 - 20mA output
willbedamaged. Itisalsoimportanttoassurepropergroundingoftheexternalrecording
device such as a PLC, DCS prior to connecting the 4 - 20mA.
When connecting the 4 - 20mA output to your PLC or DCS system, the yellow wire is the (+) positive
side of the output. e green wire is the (-) negative side of the output.
To verify the signal output of the 4 - 20mA circuit is working properly, connect an ammeter across they
yellow and green wire. With no oxygen sensor connector, it should read approximately 4mA. If a sen-
sor is installed you can verify the signal matches with the following formula:
Signal Output (mA) = [(Reading / Full Scale Range) x 16] + 4
For example, if we are reading 500ppm on the 1000 ppm range:
Signal Output (mA) = [(500/1000) x 16] + 4
Signal Output (mA) = 12mA
3.4 Optional 0 - 1VDC Output
e EMD-570 is pre-congured with an optional 0 - 1V DC output. It is not wired to the 4-connector
cable, however if it is necessary, contact the factory and a detailed set of instructions can be made avail-
able so you can congure this feature in the eld.

Part 4 Maintenance
4.1 Span Calibration using Ambient Air
Calibration involves using a known span gas to match and adjust the oxygen sensor / analyzer
combo to a known value. is can be as simple as using ambient air that tends to be a constant
20.9% which is what we will focus on for section 4.1. For calibrating with a certied SPAN Gas,
please proceed to section 4.2. For a decision on which type of calibration is good for your pro-
cess consult the factory for a recommendation.
Calibration using Ambient Air:
If using ambient air to calibrate the sensor, it is recommended to read
through the calibration proceedure prior to performing an air calibration
to make sure all instructions are understood. Consult the factory if any
questions arise.
If the sensor is already installed in the sensor housing, you will need to
connect the gas samples line as noted in section 2.5 or expose the sensor
to ambient air which is typically 20.9%. Using the ow through
sensor housing, you can open up the housing and with two ngers, hold
the sensor to the top portion of the unit, making sure the sensor
contacts are rmly touching the gold pogo pins on the housing.
Let the reading stabilize for about 60 seconds and then proceed to adjust the
front span knob until the reading displays 20.9% (or your local oxygen levels
which can uctuate due to pressure and altitude from sea).
Once calibrated, Promptly put the sensor in a zero or low O2 gas. is will help
extend the life of the sensor and speed of the response time. Sensor should be
exposed to ambient air for less than 4 minutes.

Part 4 Maintenance
4.2 Span Calibration using a Certied Span Gas
Calibration involves using a known span gas to match and adjust the oxygen sensor / trans-
mitter combo to a known value. is can be as simple as using ambient air that tends to be a
constant 20.9% or a bottle of certied span gas from your local air separation company. For
this section, we will focus on using a certied span gas from your local air separation company.
When using a certied bottle, it is recommended to get a span gas equal to 90% of the range
you want to use. If you are measuring in the 0 - 1000ppm range, a 900 ppm O2 / balance N2
would be ideal. Keep in mind however that a span gas supply company might have an 882 or
845ppm O2 / balance N2 blend that will work just as good.
For a decision on which type of calibration is good for your process, consult the factory for a
recommendation.
Calibration using Certied Span Gas:
It is recommended to read through the calibration prior to performing
an air calibration to make sure all instructions are understood. Consult
the factory if any questions arise.
Note: For a new sensor, purging with a zero gas for 4 - 6 hours will help
the low end stability and response and is necessary to get down to single
digit ppm O2 levels.
Connect the gas sample line and set the pressure / ow per section 2.5
of the users manual.
Once the gas is owing, let the reading stabilize for about 2 - 5 minutes
or until the reading is stable. Proceed to adjust the span knob until the
display matches the certied span gas bottle.

Part 4 Maintenance
4.3 Procedure for Replacing the Oxygen Sensor
Oxygen Sensor Replacement:
e characteristics of a precision electrochemical fuel cell are similar to those of a battery in that they
both provide an output that is nearly constant throughout their useful life and simply fall o sharply
towards zero at the end.
If the process sample that is being analyzed is in the low range (0 - 10ppm) of oxygen concentration,
cell failure will be indicated by the inability to properly calibrate the analyzer. e user will also nd
that very little adjustment of the span calibration feature will be necessary to keep the analyzer in cali-
bration during the sensors useful life. If a large adjustment is needed to calibrate the unit or calibration
cannot be reached, the sensor should immediately be replaced.
** Note, make sure to read section 2.4 “Installing the Oxygen Sensor” before replacing the sensor.
No tools are required to replace the sensor. Simply unscrew (Counter-Clockwise) the collar. Once
free, open the top portion of the sensor housing exposing the old oxygen sensor. Remove the old oxy-
gen sensor, disposing like you would a lead-acid battery in accordance with your local regulations.
Remove the new sensor from its package and remove the shorting strips. Place the sensor screen side
down in the sensor housing with the copper circuit board pointed up. Proceed to re-connect the collar.
Aer the sensor has been replaced, proceed to the Span Calibration section and purge with inert gas.
** Trace oxygen sensor should not be exposed to ambient air for more than a few minutes or their re-
sponse time and expected life will be adversely aected.
4.4 Troubleshooting
For troubleshooting and advanced maintenance techniques, please contact your factory representative
for assistance.
Email: [email protected]
Ph: 1-949-398-2879

Part 5 Annexures
5.1 Spare Parts List
Spare Parts List - EMD-570
Replacement Oxygen Sensors:
TO2-1x PPM Oxygen Sensor (inert gas)
TO2-2x PPM Oxygen Sensor (Co2 background gas)
Replacement Parts:
CABL-1054 6 ft. 4-Pin Stereo Cable (red/black/yellow/green)
ORING-1001 Sensor Housing O’ring
For additional troubleshooting or replacement parts, please contact the factory:
[email protected]; Ph: 1-949-398-2879

Part 5 Annexures
5.2 Warranty
Oxygen Sensor Warranty
The design and manufacture of our precision electrochemical oxygen sensors conforms to established
standards and incorporates state of the art materials and components for superior performance while still
maintaining minimal cost of ownership. Prior to shipment, every sensor is thoroughly tested by the manu-
facturer. When operated and maintained in accordance with the Owner’s Manual, the units will provide
many months of reliable service.
Coverage
Under normal operating conditions the sensor’s are warranted to be free of defects in materials and work-
manship for the period specied in accordance with the most recent published specications, said period
begins with the date of shipment by the manufacturer. The manufacturer information and serial number of
this analyzer are located on the body of the sensor. Southland Sensing Ltd. reserves the right in its sole
discretion to invalidate this warranty if the serial number does not appear on the sensor.
Limitations
Southland Sensing Ltd. will not pay for: loss of time, inconvenience, loss of use, or property damage
caused by the oxygen sensor or its failure to work.
Exclusions
This warranty does not cover installation, defects resulting from accidents, damage while in transit to our
service location, damage resulting from alterations, misuse or abuse, lack of proper maintenance, unau-
thorized repair or modication of the analyzer, afxing of any label or attachment not provided with the
analyzer, re or ood.
Service
Call Southland Sensing Ltd. at 1-949-398-2879 (or e-mail [email protected]). Trained technicians will assist
you in diagnosing the problem.

Part 5 Annexures
5.3 Material Safety Data Sheet (MSDS)
Product Identication
Product Name Oxygen Sensor Series – PO2, TO2 series
Synonyms Precision Electrochemical Sensor
Manufacturer Southland Sensing Ltd, 4045 E. Guasti Rd. #203, Ontario, CA 91761 USA
Emergency Phone Number 1-949-398-2879
Preparation / Revision Date April 23rd, 2014
Notes Oxygen sensors are sealed, contain protective coverings and in normal conditions do not
present a health hazard. Information applies to electrolyte unless otherwise noted.
Specic Generic Ingredients
Carcinogens at levels > 0.1% None
Others at levels > 1.0% Potassium Hydroxide or Acetic Acid, Lead
CAS Number Potassium Hydroxide = KOH 1310-58-3 or Acetic Acid = 64-19-7, Lead = Pb 7439-92-1
General Requirements
Use Potassium Hydroxide or Acetic Acid - electrolyte, Lead - anode
Handling Rubber or latex gloves, safety glasses
Storage Indenitely
Physical Properties
Boiling Point Range KOH = 100 to 115 C or Acetic Acid = 100 to 117 C
Melting Point Range KOH -10 to 0 C or Acetic Acid – NA, Lead 327 C
Freezing Point KOH = -40 to -10 C or Acetic Acid = -40 to -10 C
Molecular Weight KOH = 56 or Acetic Acid – NA, Lead = 207
Specic Gravity KOH = 1.09 @ 20 C, Acetic Acid = 1.05 @ 20 C
Vapor Pressure KOH = NA or Acetic Acid = 11.4 @ 20 C
Vapor Density KOH – NA or Acetic Acid = 2.07
pH KOH > 14 or Acetic Acid = 2-3
Solubility in H2O Complete
% Volatiles by Volume None
Evaporation Rate Similar to water
Appearance and Odor Aqueous solutions: KOH = Colorless, odorless or Acetic Acid = Colorless, vinegar-like
odor
Fire and Explosion Data
Flash and Fire Points Not applicable
Flammable Limits Not ammable
Extinguishing Method Not applicable
Special Fire Fighting Procedures Not applicable
Unusual Fire and Explosion Hazards Not applicable

Part 5 Annexures
5.3 Cont. Material Safety Data Sheet (MSDS)
Reactivity Data
Stability Stable
Conditions Contributing to Instability None
Incompatibility KOH = Avoid contact with strong acids or Acetic Acid = Avoid contact with
strong bases
Hazardous Decomposition Products KOH = None or Acetic Acid = Emits toxic fumes when heated
Conditions to Avoid KOH = None or Acetic Acid = Heat
Spill or Leak
Steps if material is released Sensor is packaged in a sealed plastic bag, check the sensor inside for electrolyte
leakage. If the sensor leaks inside the plastic bag or inside an analyzer sensor
housing do not remove it without rubber or latex gloves and safety glasses and a
source of water. Flush or wipe all surfaces repeatedly with water or wet paper
towel (fresh each time).
Disposal In accordance with federal, state and local regulations.
Health Hazard Information
Primary Route(s) of Entry Ingestion, eye and skin contact
Exposure Limits Potassium Hydroxide - ACGIH TLV 2 mg/cubic meter or Acetic Acid - ACGIH
TLV / OSHA PEL 10 ppm (TWA), Lead - OSHA PEL .05 mg/cubic meter
Ingestion Electrolyte could be harmful or fatal if swallowed. KOH = Oral LD50 (RAT) =
2433 mg/kg or Acetic Acid = Oral LD50 (RAT) = 6620 mg/kg
Eye Electrolyte is corrosive and eye contact could result in permanent loss of vision.
Skin Electrolyte is corrosive and skin contact could result in a chemical burn.
Inhalation Liquid inhalation is unlikely.
Symptoms Eye contact - burning sensation. Skin contact - soapy slick feeling.
Medical Conditions Aggravated None
Carcinogenic Reference Data KOH and Acetic Acid = NTP Annual Report on Carcinogens - not listed; LARC
Monographs - not listed; OSHA - not listed
Other Lead is listed as a chemical known to the State of California to cause birth defects
or other reproductive harm.
Special Protection
Ventilation Requirements None
Eye Safety glasses
Hand Rubber or latex gloves
Respirator Type Not applicable
Other Special Protection None
Special Precautions
Precautions Do not remove the sensor’s protective Teon and PCB coverings. Do not probe
the sensor with sharp objects. Wash hands thoroughly aer handling. Avoid con
tact with eyes, skin and clothing.
Empty sensor body may contain hazardous residue.
Transportation Not applicable

Part 5 Annexures
5.4 Certicate of Conformance
Model Number: EMD-570 Trace Oxygen Transmitter
Serial Number: ________________
Sensor Selection: ( ) TO2-1x Trace Oxygen Sensor
( ) TO2-2x Trace Oxygen Sensor CO2 > 0.1%
Serial Number: ________________
Sensor Housing Selection: ( ) Flow Through Sensor Housing 1/8” Swagelok
( ) Flow Through Sensor Housing 1/4” Swagelok
Conguration:
Ranges: 0-10ppm, 0 - 100ppm, 0 - 1000ppm, 0 - 1%, and 0 - 25%
Power: 12 - 28 VDC
Analog Output 1: 4 - 20mA Isolated
Analog Output 2 0 - 1V DC
Analog output pre-set range: ___________
Electronics Test:
Linearity in Range 1 < 1% ____________
Linearity in Range 2 < 1% ____________
Gas Test:
Linearity in Range 1 < 1% ____________
Linearity in Range 2 < 1% ____________
We certify that the parts shipped to you are manufactured in the USA and conform to all
requirements of the Purchase Order. These parts have been manufactured and tested to the
highest quality standards and in accordance with all required specications, instructions and
technical drawings.
Date: __________________ Signature: _________________________