SST OXY-Flex Manual
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OXY-Flex Oxygen Analyser
FEATURES
High accuracy linear output
Configurable outputs:
4-20mA and 0-10
interface
Selectable output measurement ranges:
Standard ranges of 0-25% O
0-100% O
or fully adjustable via RS232 when
2
configured in 0-100% O
Externally triggered automatic or manual
calibration
Can be calibrated in normal air (20.7% O
any other known O
Cycling 3.3
logic output allows direct
V
DC
monitoring of the O
diagnostic purposes
Selectable output filtering allows adaptive, fast
and dynamic or slow and stable output
SPECIFICATIONS
Maximum ratings
Supply voltage
Current consumption
4-20mA Load
Temperature limits (electronics enclosure)
Storage
Operating
Temperature limits
(permissible gas temperature at sensor tip)
Operating
(Standard Temp)
(High Temp)
Gas flow rate
Weight
Incidental permissible acceleration
Repetitive permissible acceleration
Sealing Rating
© 2012 SST Sensing Ltd
DS0073 Rev 10
or RS232 comms
V
DC
and
2
mode
2
concentration
2
sensor pump cycle for
2
24V
DC
500mA max
@ 24V
100 to 600Ω
-10 to 85C
-10 to 85C
-100 to 250C
-100 to 400C
0 to 10 m/s
<450g
30g
5g
IP65
OXY-Flex-0-H
) or in
2
APPLICATIONS
Combustion control including oil, gas and
± 10%
biomass boiler applications
Composting
Laboratory & building air quality monitoring
DC
including confined space personnel safety
Industrial process control i.e. gas mixing for
welding and steel making
Oxygen generation systems
Medical
Scientific including respiratory studies of a
community or an organism, plants and
animals
Food and beverage packaging
Applications where low oxygen is key
including fermentation, rust and corrosion
prevention, inerting and purging
1 of 12
www.sstsensing.com

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Summary of Contents for SST OXY-Flex

  • Page 1 Food and beverage packaging Weight <450g Incidental permissible acceleration  Applications where low oxygen is key Repetitive permissible acceleration including fermentation, rust and corrosion Sealing Rating IP65 prevention, inerting and purging © 2012 SST Sensing Ltd 1 of 12 www.sstsensing.com DS0073 Rev 10...
  • Page 2 LED. During the calibration process the The OXY-FLEX Series can be user configured to output output will either automatically calibrate to a fixed measuring ranges of 0-25% O and 0-100% O .
  • Page 3: Performance Characteristics

    For example if the sensor was reading 21% O at 1013.25mbar and the BP increased by 1% the sensor readout would also increase by 1% to 21.21% O © 2012 SST Sensing Ltd 3 of 12 www.sstsensing.com DS0073 Rev 10...
  • Page 4 OXY-Flex Oxygen Analyser OUTLINE DRAWING AND MOUNTING INFORMATION Mounting holes accessible on removal of housing lid PCB LAYOUT (REMOVE HOUSING LID TO VIEW) © 2012 SST Sensing Ltd 4 of 12 www.sstsensing.com DS0073 Rev 10...
  • Page 5: Electrical Connections

    (pin 6) it is recommended that a separate GND wire for the measurement system is taken from PIN 2. This removes errors due to voltage drops in the power supply connections. SYSYEM BLOCK DIAGRAM © 2012 SST Sensing Ltd 5 of 12 www.sstsensing.com...
  • Page 6 RS232 COMMUNICATION SETTINGS When connecting the OXY-FLEX via the RS232 connections ensure Tx goes to Rx of the PC and Rx goes to Tx of the The OXY-Flex communicates via standard COM port settings that are default on most PCs and many other RS232 compatible devices.
  • Page 7 RS232 OPERATION The OXY-FLEX may be reconfigured at any time by With the OXY-FLEX RS232 outputs connected to a PC or adjusting the position of the header pin jumper links on the any other RS232 compatible device the user has the interface PCB.
  • Page 8 Analogue Outputs (4-20mA and 0-10V 20.7% O to allow simple calibration in normal air. The The OXY-FLEX is factory default to output a range of auto calibration value is factory set to 20.7% to take into 0-25% O via its two analogue outputs. This range can be account average humidity in the atmosphere.
  • Page 9: Calibration Procedures

    OXY-Flex Oxygen Analyser CALIBRATION PROCEDURES ERROR CONDITIONS Automatic Calibration If the oxygen sensor is damaged the OXY-Flex will  Ensure the OXY-FLEX is configured for automatic highlight this by blinking the CYCLE output (pin 4) and calibration. See CONFIGURATION on Page 7.
  • Page 10 SENSOR OPERATING TIPS To get the best performance from the OXY-Flex analyser it is important that the oxygen probe is installed and maintained in the correct manner. The following two pages outline some useful sensor operating tips and a list of gases and materials that must be avoided to ensure a long sensor life.
  • Page 11 Dust. Fine dust (Carbon parts/soot) might cause clogging of the porous stainless steel filter and might have an effect on the response of the sensor to oxygen changes.  Heavy shocks or vibrations may alter sensor properties resulting in the need for a recalibration. © 2012 SST Sensing Ltd 11 of 12 DS0073 Rev 10...
  • Page 12: Ordering Information

    General Note: SST Sensing Ltd reserves the right to make changes in product specifications without notice or liability. All information is subject to SST’s own data and considered accurate at time of going to print.

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