Southland OMD-525X User manual

Wall Mount
Oxygen Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Rev 1.00 June 19th, 2022_DF
Instruction Manual
OMD-525X Oxygen Analyzer

Part 1 Introduction
Part 2 Installation
Part 3 Operation
Part 5 Annexures
Part 4 Maintenance
1.1 General Introduction
1.2 Principle of Operation - The Oxygen Sensor
1.3 OMD-525XSpecications
1.4.1 General Safety Information (VAC)
1.4.2 General Safety Information (VDC)
1.5 Location Installation Considerations
1.6 Safety Considerations
2.1 Receiving Your New Oxygen Analyzer
2.2 Mounting The Oxygen Analyzer
2.3.1 Electrical Connections (VAC)
2.3.2 Electrical Connections (VDC)
2.4 Gas Connections
2.5 Installing The Oxygen Sensor
3.1 Understanding The Controls and Their Operation
3.2 Setting the Date and Time
3.3 Manual Range Output Adjustment
3.4 Analog Output 4 - 20mA
3.5 Advanced Integral Alarms
3.6 Range ID
3.7 Selecting Sensor Type
3.8 Setting a Custom Range
3.9 USB Data Logging
3.10 Output Simulation
3.11 Output Calibration
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
4.5 Zero Calibration
5.1 Spare Parts List
5.2 Warranty
5.3 Material Safety Data Sheets
5.4 ConformanceCerticate
5.5 Modbus Instructions
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Table of Contents
OMD-525X Oxygen Analyzer

1.1 General Introduction
The Southland Sensing OMD-525X Oxygen Analyzer is a microprocessor based online unit designed for
continous measurements in a variety of applications and gas mixtures.
The analyzer was designed with the customer in mind, keeping the operations simple while still featur-
ing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.
The analyzer has numerous options including PPM, Percent, and Purity oxygen analysis. The unit can
beconguredforVACorVDCpowerinputwithananalog4-20mAconcentrationoutputanddigital
RS485 Modbus ASCII output meeting most general purpose oxygen analysis applications.
Southland Sensing Ltd. appreciates your business and recommends reading through the complete
manual to be able to get the full experience from your new oxygen analyzer.
1.2 Principle of Operation - The Oxygen Sensor
The precision electrochemical oxygen sensor used in the OMD-525X is designed and manufactured by
Southland Sensing Ltd. under a strict quality procedure.
To understand how the oxygen analyzer functions, it is important to understand a little bit of the sen-
sor characteristics.
The active components in the precision electrochemical oxygen sensor are the anode, cathode, and
aqueous electrolyte which are all housed in the cell body. The oxygen molecules in the application
pass through the front sensing membrane into the electrolyte, where a chemical reaction occurs and a
raw electrical current is generated.
This electrical current is proportional to the amount of oxygen in the application. The analyzer then
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.
The oxygen concentration reading is then displayed in real time on the full backlit display and the user
can automate the control of their process using the standard 4 - 20 mA concentration analog output
signal which can be run to a PLC or other type of DCS system.
Precision Electrochemical Oxygen Sensor
Introduction
OMD-525X Oxygen Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com

Specications:
Accuracy: +/- 1% Full Scale Range*
Display: LCD with Backlight
Dimensions: 9.5 x 6.5 x 3.8 Inches
Enclosure: Wall Mount IP66 / NEMA4X
Classication: General Purpose
Temperature: 0 - 50°C
Alarms: 2 Adjustable w/ delay mode
Power: 100 - 240 VAC or 10 - 28 VDC
Data Logging: Removable USB Stick
Signal Output (analog): 4 - 20mA
Communication Bi-Directional MODBUS RS485
ASCII
Range ID: 1 - 5 VDC (Optional 4 -20mA)
Calibration: Periodically
Pressure: 0.1 - 50 PSIG
Temperature Compensation: Integral
Flow Sensitivity: 0.5 - 5 SCFH
Warranty: 12 Months Sensor
12 Months Electronics
*Accuracy at constant conditions
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Rev 1.02 July 19th, 2022_DF
ProductSpecicationSheet
OMD-525X Oxygen Analyzer
Online Trace Oxygen Analyzer, IP66 / NEMA 4X Wall Mount Enclosure
Trace, Percent, or Purity Conguration
Precision Fuel Cell Oxygen Sensor Technology
Measure Oxygen from 0.01 ppm to 100%
Large Easy-to-Read Display
Intuitive User Friendly Menu Interface
Compact Indoor or Outdoor Enclosure
Cost Eective and Low Maintenance
Integral USB Data Logging
Applications:
“Inquiry for Application Expertise”
• Nitrogen and O2 PSA Generators
• Laboratories & Universities
• Beverage Grade CO2 Monitoring
• Welding & 3D Printers
• Air Separation Plants
& Many Others
TheOMD-525Xoerstheuniqueabilitytologdatainreal
time via a removable USB drive. Data is logged in an Excel
compatible.csvlebydatewithanintervalbetween1and
120 minutes.
Logging at intervals of 1 minute you can store up to ap-
proximately50yearsworthofdatabeforellingupan8GB
USBashdrive.
Theanalyzercanbeconguredfortrace(parts-per-mil-
lion), percent, or purity applications by the user by select-
ing the desired ranges in the built-in menu and using the
appropriate sensor.

OMD-525X Oxygen Analyzer Product Specications
Oxygen Analyzer: Oxygen Sensor Technology:
Order Information:
Optional Alarms:
Oxygen Sensors:
Record Part Number with selected options in Blank Indicated Area of Form
Model Number:
OMD-525X Oxygen Analyzer
Selected Range & Sensor:
1 Trace Analysis Standard (TO2-1x): 0 - 10ppm, 0 - 100ppm, 0 - 1000ppm, 0 - 1%, 0 - 25%
2 Trace Analysis Acidic (TO2-2x): 0 - 10ppm, 0 - 100ppm, 0 - 1000ppm, 0 - 1%, 0 - 25%
5 Percent Analysis Standard (PO2-160): 0 - 1%, 0 - 5%, 0 - 10%, 0 - 25%, 0 - 100%
6 Percent Analysis Acidic (PO2-24): 0 - 1%, 0 - 5%, 0 - 10%, 0 - 25%, 0 - 100%
7 Purity Analysis Standard (PO2-1120): 0 - 1%, 0 - 5%, 0 - 10%, 0 - 25%, 0 - 100%
Power Option:
A 100 - 240 VAC Analyzer, 4-20 mA Analog Output, Integral Alarms, MODBUS RS485 ASCII
D 10 - 28 VDC Analyzer, 4-20 mA Analog Output, Integral Alarms, MODBUS RS485 ASCII
OMD-525X - - -
The oxygen sensor used in the OMD-525X is based on the
galvanic electrochemical fuel cell principal. All oxygen sensors
are manufactured in house by Southland Sensing Ltd. under a
strict quality program.
Thestandardcellsareunaectedbyotherbackgroundgases
such as H2, He or Hydrocarbons. The acidic cells work well
when acid gases such as CO2 or Natural Gas are present.
The sensors are self-contained and minimal maintenance is
required - no need to clean electrodes or add electrolyte.
TheSSO2precisionoxygensensorsoerexcellentperfor-
mance, accuracy and stability while maximizing the expected
life.
TO2-1x PPM Oxygen Sensor: Trace Analysis, Standard
TO2-2x PPM Oxygen Sensor: Trace Analysis, Acidic
PO2-160 Percent Oxygen Sensor: Percent Analysis, Standard
PO2-24 Percent Oxygen Sensor: Percent Analysis, Acidic
PO2-1120 Purity Oxygen Sensor: Percent Analysis, Standard
TO2-19 Hybrid Oxygen Sensor: Percent or Trace Analysis
Oxygen sensors should be periodically calibrated. Factory
recommendation is every 2 - 3 months or as the application
dictates.Sensorsoerexcellentlinearitywithanaircalibration,
orcalibratetoacertiedspangastomaximizeaccuracy.
The model OMD-525X oxygen analyzer combines a
rugged in-line design with SSO2’s precision oxygen
sensors. The result is a highly reliable and cost
eectivecompactdesignwithaneasy-to-useuser
interface.
Theanalyzercanbeconguredforeither10-28
VDCor100-240VACpowertotavarietyofappli-
cations.Itcanalsobeconguredfortrace,(parts-
per-million) percent, or purity analysis using the
on-board menu and correct sensor.
The auto-range feature allows the user to read O2
throughout all relevant ranges on the local display in
large font.
The output can be range selected through the on-
board menu allowing easy interface with a PLC, DCS
or other control system.
Gas connections are made with compression tube
ttings(1/8”,1/4”or6mm).
Gas Connections:
81/8”CompressionTubeFittings
41/4”CompressionTubeFittings
6 6 mm Compression Tube Fittings
2-nonlatchingfullycongurableFormCrelay
contact alarms.
Use This Part Number When Ordering
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Rev 1.02 July 19th, 2022_DF

1.4.1 General Safety & Installation (VAC)
This section summarizes the precautions applicable to the OMD-525X Oxygen Analyzer. Additional pre-
cautionsspecictothisanalyzerarecontainedinthefollowingsectionsofthemanual.Tooperatethe
analyzer safely and to obtain the best performance, follow the basic guidelines outlines in this owner’s
manual.
CAUTION:
WARNING:
CAUTION:
This symbol is used throughout the owner’s manual to warn and alert the
user of the presence of electrostatic discharge.
This symbol is used throughout the owner’s manual to caution and alert
the user to recommended safety and / or operating guidelines.
This symbol is used throughout the owner’s manual to caution and alert
the user that this device is operated on AC Voltage (VAC)
READ INSTRUCTIONS: Before operating the oxygen analyzer, read the instructions.
RETAIN INSTRUCTIONS: The safety precautions and operating instructions found in the owner’s
manual should be retained for future reference.
FOLLOW INSTRUCTIONS: Observe all precautions and operating instructions. Failure to do so may
result in personal injury or damage to the transmitter.
OXYGEN ANALYZER LABEL:
Introduction
OMD-525X Oxygen Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Model Number: OMD-525X
Serial Number: 0036785
Oxygen Analyzer
Voltage: 100 - 240 VAC
Max Current: 100mA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA
Ph: [phone] Web: www.sso2.com
This section is for AC powered analyzers, if your analyzer is DC powered proceed to the next page.

1.4.2 General Safety & Installation (VDC)
This section summarizes the precautions applicable to the OMD-525X Oxygen Analyzer. Additional pre-
cautionsspecictothisanalyzerarecontainedinthefollowingsectionsofthemanual.Tooperatethe
analyzer safely and to obtain the best performance, follow the basic guidelines outlines in this owner’s
manual.
CAUTION:
WARNING:
CAUTION:
This symbol is used throughout the owner’s manual to warn and alert the
user of the presence of electrostatic discharge.
This symbol is used throughout the owner’s manual to caution and alert
the user to recommended safety and / or operating guidelines.
This symbol is used throughout the owner’s manual to caution and alert
the user that this device is operated on DC Voltage (VDC)
READ INSTRUCTIONS: Before operating the oxygen analyzer, read the instructions.
RETAIN INSTRUCTIONS: The safety precautions and operating instructions found in the owner’s
manual should be retained for future reference.
FOLLOW INSTRUCTIONS: Observe all precautions and operating instructions. Failure to do so may
result in personal injury or damage to the transmitter.
OXYGEN ANALYZER LABEL:
Introduction
OMD-525X Oxygen Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Model Number: OMD-525X
Serial Number: 0036785
Oxygen Analyzer
Voltage: 10 - 28 VDC
Max Current: 100mA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA
Ph: [phone] Web: www.sso2.com
This section is for DC powered analyzers, if your analyzer is AC powered see the previous page.

1.5 Location Installation Considerations
The Southland Sensing OMD-525X Oxygen Analyzer is designed to be wall mounted in a general
purpose area and uses a NEMA4X / IP66 Enclosure. When installed outdoors in cold areas an optional
heater is recommended as well. Consider also giving the analyzer a sun shield if it is going to be
mounted in the direct sunlight.
Reference your local electrical authority for the proper installation.
The analyzer is EMI / RFI protected, however it is good practice not to mount it too close to sources
of electrical interference such as large transformers, motor start contactors, relays, large pumps, etc.
Alsoavoidsubjectingtheanalyzertosignicantvibration.
Mount the unit at a suitable eye level to easily read the local display. Gas connections are located on
the top right side of the analyzer, ensure there is adequate room to hook up your gas lines.
1.6 Safety Considerations
The oxygen analyzer is designed for installation into a general purpose area. Please follow your local
electrical code.
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Introduction
OMD-525X Oxygen Analyzer

2.1 Receiving Your New Oxygen Analyzer
As soon as you receive your new oxygen analyzer carefully unpack the unit and accessories and inspect
the interior and exterior of the analyzer 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 ni-
trogen purged bag and will be damaged if left exposed to ambient air for a prolonged
period of time. It is recommended that you read through the instruction manual
installation and operation sections before attempting to open the bag the oxygen
sensor is packed in. For questions, please contact the factory.
If damage to any portion of the new analyzer is present, stop and report damage to the shipping com-
pany as well as the factory.
The 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 en-
tering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.
Installation
OMD-525X Oxygen Analyzer
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com

2.2 Mounting the Oxygen Analyzer
The OMD-525X is designed for general purpose installations. If mounting in extreme temperature con-
sider a secondary heated enclosure.
Refer to Part 3: Operation section of this instruction manual for more information on how to operate the
controls of this oxygen analyzer.
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 nitrogen lled oxygen sensor bag until you have thoroughly read
the instruction manual and have made all gas and electrical connections. Please refer to
section 2.5 to reference installing the oxygen sensor into the sensor housing as well as sec-
tion 4.1 and 4.2 on SPAN Calibration.
When installing the analyzer, it is important to make sure the unit is wall mounted standing upright. This
ensures the sensor is always facing down (sensing surface down, circuit board up) to allow any air bub-
bles to not interfere with the sensing membrane.
Designed, Tested, and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : [email protected] : www.sso2.com
Installation
OMD-525X Oxygen Analyzer
Oxygen Sensor Front and Rear View
The sensor housing has 4 wires and should arrive wired to the circuit board, into the green termi-
nal block as follows:
Sensor (+) red wire = Sensor (+) Pin
Sensor (-) black wire = Sensor (-) Pin
Temp Comp white wire = Sensor TH Pin
Temp Comp green wire = Sensor TH Pin