Southland OMD-501D User manual

OMD-501D
Trace Oxygen Analyzer
4045 E. Guasti Rd. #203
Ontario, CA 91761 USA
Web: www.sso2.com
Phone: [phone]
E-mail: [email protected]
OMD-501D Manual Rev 1.3 1_2015
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 OMD-501D Specications
2.1 Receiving Your New Oxygen Analyzer
2.2 Mounting the Electronics Module
2.3 Mounting the Sensor Housing
2.4 Electrical Connections
2.5 Gas Connections
2.6 Installing the Oxygen Sensor using the H3 Flow rough Sensor Housing
2.7 Installing the Oxygen Sensor using the H1 KF40 Sensor Housing
3.1 Understanding the Controls and eir Operation
3.2 Measurement Range Overview
3.3 Advanced Alarm Functions
3.4 Analog Output - 4 - 20mA
3.5 Range ID and its function
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 OMD-501D Trace Oxygen Analyzer is a microprocessor based online analyzer
designed for continous measurements in a variety of applications and gas mixtures.
e 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.
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 oxygen analyzer.
1.2 Principle of Operation - e Oxygen Sensor
e precision electrochemical oxygen sensor used in the OMD-501D is designed and manufactured by
Southland Sensing Ltd under a strict quality proceedure.
To understand how the oxygen analyzer functions, it is important to understand a little bit of the sensor
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 color backlite display, the user can control their pro-
cess using the two fully adjustable alarms with a built in delay feature. or output the analog 4 - 20mA
signal to a PLC or other control system.
Precision Electrochemical Oxygen Sensor

Part 1 Introduction
1.3 OMD-501D Specications
OMD-501D Trace Oxygen Analyzer
Precision Electrochemical Sensor Technology
Large Color Display w/ User Friendly Menu
5 Standard Analysis Ranges
Auto-Ranging or Manual Range Mode
Two Adjustable Alarm Contacts w/ delay mode
Panel Mount, 1/4 DIN Enclosure Design
Applications:
“Inquiry for Application Expertise”
• InertGloveBoxSystems
• N2andO2Skids
• Laboratories&Universities
• BeverageGradeCO2Monitoring
• AirSeparationPlants
 &ManyOthers
Specications:
Ranges: 0-10/100/1000ppm/1%/25%
Accuracy: +/- 1% Full Scale Range*
Display: ColorwithBacklight
Dimensions: 1/4 DIN (96 x 96 x 65mm)
Enclosure: FlushMount,ABS
Classication: GeneralPurpose
Temperature: 0 - 50 deg C
Alarms: 2AdjustableNOorNC
Power: 12-28VDCor100-240VAC
SignalOutput: 4-20mA
RangeID: 1-5VDC
Response time: T90 in 10 Seconds
Sensor: TO2-1xTraceOxygen
Sensor Life: 18—25months
Calibration: Periodically
Temperature Compensation: Integral
Recommended Flow: 0.5 - 4 SCFH
FlowCell: H3FlowCell,1/8”Swagelok
Warranty: 12MonthsSensor
Warranty: 12MonthsElectronics
*Accuracy at constant conditions
Optional Accessories:
•Optional Ranges: Fully Customizable from Factory
• H3FlowHousing1/4”SwagelokorOtherConnection
• H1DirectInstallKF-40SensorHousing
• IP66EnclosureforOutdoorInstallation
• CustomizeableSampleSystem
• TO2-2xOxygenSensorwith>0.5%CO2Present

Part 2 Installation
2.1 Receiving your New Oxygen Analyzer
As soon as you receive your new Trace Oxygen Analyzer, 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 le 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 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.
Remote sensor housing installation: e sensor housing can be installed up to 6 feet from the electronics
module. Further than 6 feet will cause signal degredation which can cause the unit to give erronous read-
ings. It is also important to be mindful of EMI / RFI noise interference. Protection from EMI / RFI noise is
important for accurate readings.

Part 2 Installation
2.2 Mounting the Electronics Module and Sensor Housing
Recommended Panel Cutout for OMD-501D
All menu control and local backlite display is accessible from the front of the panel. e front panel has 5
push button membrane switches, a large backlite display which includes the oxygen reading and alarm set-
points.
e OMD-501D is designed as an indoor unit. For eld installations, please refer to the NEMA4X, IP66 en-
closure option oered by Southland Sensing Ltd.
Refer to part 3 operation section of this instruction manual for more information on how to operate the con-
trols and other functions of this advanced oxygen analyzer.
For panel mount conguration, it is recom-
mended to use a panel with a cutout according
to the drawing on the le.
e OMD-501D can be mounted inside a
NEMA4X or IP66 enclosure for outdoor eld
installations.

Part 2 Installation
2.3 Mounting the Electronics Module and Sensor Housing
H3 Sensor Housing Dimensions
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 instruc-
tion 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 H3 sensor housing, it is important to make sure the bottom portion of the sensor
housing is mounted at and the top portion of the sensor housing which is manufactured of 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
e sensor housing has 4 wires and should be hard wired into the
back of the OMD-501D electronics module as follows:
Sensor (+) red wire = Pin 5
Sensor (-) black wire = Pin 6
ATC (+) white wire = Pin 7
ATC (-) Green wire = Pin 8
e sensor housing comes with a 6 foot ca-
ble. Longer cable should NOT be spliced in
as the signal can degrade and cause erronous
readings.

Part 2 Installation
2.4 Electrical Connections
Rear Imagine of Controller
TOP
BOTTOM
Pin 1: Power (+)
Pin 2: Power (-)
Pin 3: 4-20mA (+)
Pin 4: 4 - 20mA (-)
Pin 5: Sensor (+)
Pin 6: Sensor (-)
Pin 7: ATC (+)
Pin 8: ATC (-)
Pin 9: Relay Contact 1 NO
Pin 10: Relay Contact 1 COM
Pin 11: Relay Contact 1 NC
Pin 12: Relay Contact 2 NO
Pin 13: Relay Contact 2 COM
Pin 14: Relay Contact 2 NC
Pin 15: Range ID (+)
Pin 16: Range ID (-)
e OMD-501D accepts a 12 - 28VDC Power supply with a 1 amp minimum rating as standard. e maxi-
mum power consumption is 8 watts. e unit has an optional 100-240VAC power supply. Verify which
power your unit has been congured with. e unit uses a screw type terminal block for electrical connec-
tions and is located at the rear of the analyzer.
e analyzer is supplied with internal protection should the polarity of the power be connected in reverse,
it is recommended to check polarity before running power to the unit. It is also recommended to add an
external fuse to the power inlet, the analyzer does have a built in fuse, but an external fuse is suggested for
ease of access.
2.5 Gas Connections
e OMD-501D with its standard H3 ow through housing is designed for positive pressure samples and re-
quires incoming sample lines. e user is responsible for added sample system components as well as sourc-
ing a 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. H3 Sensor Housing
4. Flow Meter, Vent to Atmosphere
Recommended Sample System

Part 2 Installation
2.6 Installing the Oxygen Sensor using H3 Flow rough Sensor Housing
e OMD-501D 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 - 4.0 SCFH.
To Install the Sensor:
- Remove the cell holder cap by unscrewing the stainless steel collar.
- Li up on the top of the sensor housing and set to the side.
- 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 housing with the metal screen mesh facing down and
the circuit board contacts facing up.
- Return upper portion of the sensor housing 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 calibrating, refer to section 4.1 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.
CAUTION: Prior to installing the oxygen sensor. Read section 4.1
on performing a span calibration.
H3 Sensor Housing Top portion of sensor housing
Stainless Steel Collar
Bottom portion of sensor housing

Part 2 Installation
2.7 Installing the Oxygen Sensor, using H1 Flow KF-40 Sensor Housing
e OMD-501D 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 - 4.0 SCFH.
e sensor housing can also be installed in a low O2 environment with no ow such as a glove box or other
closed environment.
To Install the Sensor:
- Remove the top portion of the sensor housing by unscrewing it.
- Li up on the top of the sensor housing and set to the side.
- 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 bottom housing with the metal screen mesh facing down
and the circuit board contacts facing up.
- Return upper portion of the sensor housing to the stainless steel bottom. Hand
tight should be acceptable to create an airtight seal.
- Immediately insert into glove box or other atmosphere with zero gas.
- If the analyzer has not been calibrating, refer to section 4.1 for more information.
CAUTION: Prior to installing the oxygen sensor. Read section 4.1
on performing a span calibration.
H1 Sensor Housing Top portion of sensor housing
Bottom portion of sensor housing