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OMD-625 Oxygen Analyzer
Instruction Manual
OMD-625 Oxygen Analyzer
Instruction Manual
OMD-625 Oxygen Analyzer
Input Power: 12 - 24V DC
OMD-625 Rev 1.12 August 20th, 2020_BB
Designed, Tested and Assembled in California, USA
4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : sales@sso2.com : www.sso2.com
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Summary of Contents for Southland OMD-625
- Page 1 OMD-625 Oxygen Analyzer Instruction Manual OMD-625 Oxygen Analyzer Input Power: 12 - 24V DC OMD-625 Rev 1.12 August 20th, 2020_BB Designed, Tested and Assembled in California, USA 4045 E. Guasti Rd. #203 Ontario, CA 91761 USA : 1-949-398-2879 : sales@sso2.com : www.sso2.com...
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Page 2: Table Of Contents
OMD-625 Oxygen Analyzer Table of Contents Part 1 Introduction General Introduction Principle Of Operation ‘The Oxygen Sensor’ 1.3 OMD-625 Specifications General Safety & Installation Guidelines Location Installation Considerations Safety Considerations Part 2 Installation Receiving Your New Oxygen Analyzer Mounting The Oxygen Analyzer... -
Page 3: Introduction
Introduction General Introduction The Southland Sensing OMD-625 Oxygen Analyzer is a microprocessor based online unit designed for continuous 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. - Page 4 OMD-625 Oxygen Analyzer Product Specification Sheet Hazardous Area Online Process Oxygen Analyzer w/Sample System Designed for the Natural Gas Industry Class 1, Div 1 Groups B, C, D Custom Full Scale Range (i.e. 0 - 99 ppm) Precision Fuel Cell Oxygen Sensor Technology...
- Page 5 Product Specifications Oxygen Analyzer: Oxygen Sensor Technology: The oxygen sensor used in the OMD-625 is based on the The model OMD-625 oxygen analyzer combines a galvanic electrochemical fuel cell principal. All oxygen sensors rugged design with SSO2’s precision oxygen sen- are manufactured in house by Southland Sensing Ltd.
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Page 6: General Safety & Installation Guidelines
Introduction General Safety & Installation This section summarizes the precautions applicable to the OMD-625 Oxygen Analyzer. Additional pre- cautions specific 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 outlined in this owner’s manual. -
Page 7: Location Installation Considerations
Location Installation Considerations The Southland Sensing OMD-625 Oxygen Analyzer is designed to be mounted on a wall or on a pipe in a general purpose, Class 1 Division 1 or Class 1 Division 2 Group B, C, D area. When installed out- doors in cold areas an optional heater is recommended as well as a heavy duty enclosure. -
Page 8: Installation
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 offers free application consultation, and we encourage you to take advantage of our engineers and their expertise. -
Page 9: Mounting The Oxygen Analyzer
OMD-625 Oxygen Analyzer Installation Mounting The Oxygen Analyzer The OMD-625 is designed to be mounted on a wall or around a pipe. When installing outdoors in an extreme environment, consider an enclosure and heater if necessary. Consult the factory for recommen- dations. -
Page 10: Electrical Connections
Installation Electrical Connections For the OMD-625 Oxygen Analyzer, power, alarms and analog output is housed in the round explosion proof enclosure on the left side of the panel. To access the circuit board, first determine if your area needs to be declassified and second remove the round enclosure top. Once removed you will have ac- cess to the J1 and J2 connectors which are the Power (J1) and Alarms / Analog output (J2). -
Page 11: Gas Connections
CAUTION: Prior to installing the oxygen sensor. Read section 4.1 on performing a span calibration. The OMD-625 can accept either a TO2-133 or TO2-233 (CO2 Applications - Natural Gas) oxygen sensor for trace oxygen analysis. For Percent measurement, the OMD-625 can accept either a PO2-160 or PO2-24 (CO2 Applications - Natural Gas) oxygen sensor. -
Page 12: Integral Sample System Flow Diagram
Installation Integral Sample System Flow Diagram Southland Sensing Ltd. strives to select the highest quality sample system components in the market. All gas connections are made via compression tube fittings. Our valves are high quality leak tight which we rigorously test in our environmental chamber. Our flow indicators / flow meters are from Dwyer, an... -
Page 13: Sensor Selection (To2-133 Vs. To2-233)
Installation Sensor Selection (TO2-133 vs. TO2-233) The OMD-625 is typically shipped with a TO2-133 or TO2-233 PPM Oxygen Sensor. The TO2-133 is de- signed with a base electrolyte for maximum performance in gases such as measuring oxygen in nitrogen, argon or hydrogen. The TO2-233 is designed with an acid electrolyte and is configured for maximum performance while measuring oxygen in CO2 and natural gas. -
Page 14: Operation
Understanding The Controls And Their Operation The OMD-625 Oxygen Analyzer is a feature packed unit with an easy to use menu interface. The key attributes within the menu are the ability to select a measurement range - including customizing your own range (i.e. -
Page 15: Manual Range Output Selection (Locks Analog Output)
O2 value is. With the OMD-625, it answers this issue with a display that auto-ranges and the ability to manu- ally lock the analog outputs. -
Page 16: Custom Range Option (I.e. 0 - 93.4Ppm Full Scale)
Custom Range Option The OMD-625 oxygen analyzer gives the users the flexible to select a full scale range to better match the application they are working with. For example these can be basic such as 0 - 200 ppm or can be a bit more exotic such as 0 - 93.2 ppm. -
Page 17: Analog Output 4 - 20Ma (1 - 5V Dc Optional)
Analog Output Adjustment (4mA and 20mA) The OMD-625 is equipped with a protocol to adjust the 4mA and 20mA signal output to account for signal degradation over long copper wires. This might occur in the field if you have 100 feet or more of cable between your OMD-625 and control panel. -
Page 18: Analog Output Simulation (4Ma, 8Ma, 12Ma, 16Ma, 20Ma)
4 - 20mA. The OMD-625 allows the user to simulate an analog output to calibrate a PLC or DCS system. To ac- complish this, the OMD-625 will self generate a 4mA, 8mA, 12mA, 16mA or 20mA signal output. -
Page 19: Alarm Configuration
3.7 Alarm Configuration The OMD-625 is equipped with two programmable alarm relay contacts rated at 5A @ 230V AC, labelled as ALARM 1 and ALARM 2 in the menu. The two alarms set points are user adjustable and can be set either as HI or LOW, and can also be disabled or selected with a delay mode through the menu. -
Page 20: Maintenance
(stainless steel mesh) is facing the ground). 20.5% Let the reading stabilize for about 30 - 45 seconds and then proceed to the following steps in the OMD-625 menu: UP - INCREASE DOWN - DECREASE... -
Page 21: Span Calibration Using Certified Span Gas
OMD-625 Oxygen Analyzer Maintenance 4.2 Span Calibration using a Certified Span Gas Calibration involves using a known span gas to match and adjust the oxygen sensor / ana- lyzer combo to a known value. This can be as simple as using ambient air that tends to be a constant 20.9% or a bottle of certified span gas from your local air separation company. -
Page 22: Procedure For Replacing The Oxygen Sensor
OMD-625 Oxygen Analyzer Maintenance Procedure for Replacing the Oxygen Sensor Oxygen Sensor Replacement: The characteristics of a precision electrochemical fuel cell are similar to those of a battery. They both provide an output that is nearly constant throughout their useful life and simply fall of sharply to- wards zero at the end. -
Page 23: Zero Calibration
OMD-625 Oxygen Analyzer Maintenance Zero Calibration In theory, the oxygen sensor is linear over its measurement range and has no signal output when ex- posed to an oxygen free environment. However, in reality expect the analyzer to generate a small signal... -
Page 24: Annexures
PPM Oxygen Sensor (CO2 background gas) PO2-160 Percent Oxygen Sensor (Inert gas) PO2-24 Percent Oxygen Sensor (CO2 background gas Replacement Parts: PCB-625-Main Circuit Board for OMD-625 12 - 24 VDC PCB-625-PWR Power Board, DC OMD-625 DISP-625 Display for OMD-625 ORING-1001 Sensor Housing O’ring... - Page 25 OMD-625 Oxygen Analyzer 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...
- Page 26 Product Name Oxygen Sensor Series – PO2, TO2 series Synonyms Precision Electrochemical Sensor Manufacturer Southland Sensing Ltd, 4045 E. Guasti Rd. Suite 203, Ontario, CA 91761 USA Emergency Phone Number 1-949-398-2879 Preparation / Revision Date April 23rd, 2012 Notes Oxygen sensors are sealed, contain protective coverings and, in normal condi tions, do not present a health hazard.
- Page 27 OMD-625 Oxygen Analyzer Annexures 5.4 Certificate of Conformance Model Number: OMD-625 Oxygen Analyzer Serial Number: ________________ Sensor Selection: ) TO2-133 Trace Oxygen Sensor ) TO2-233 Trace Oxygen Sensor CO2 > 0.1% ) TO2-238 Trace Oxygen Sensor < 500 PPM H2S ) PO2-160 Percent Oxygen Sensor ) PO2-24 Percent Oxygen Sensor CO2 >...
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