background image

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.  This 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 certified 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 procedure 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%.  If using the H3 flow through 

sensor housing, you can open up the housing and with two fingers, hold

the sensor to the top portion of the housing, making sure the sensor 

contacts are firmly touching the gold pogo pins on the housing.  The H1 

sensor housing alread has a hole at the bottom of the sensor that exposes

the sensing surface to ambient air.

Let the reading stabilize for about 45 seconds and then proceed to the 

following steps in the OMD-501D menu: 

SPAN calibration: To Calibrate the indicator, press MENU key  

Use UP/DOWN keys to bring * besides the option 

SPAN CAL and press ENTER key:

SPAN CALIBRATION: To calibrate the analyzer, press MENU key

use UP / DOWN keys to bring the cursor to select the SPAN

CALIBRATION selection and press ENTER.  Select the PERCENT range

The cursor will show RED next to the digit that can be edited.  Use the UP

/ DOWN key to set the required value.  You can shift to the next digit

by pressing the ENTER key.  For example, if the current reading is 22.0% 

and you need to set it to 20.9%, Using the UP and DOWN key to adjust the 

value and than the enter key to toggle to the next digit.  A final ENTER is 

needed to save the value and change the display.

Once ENTER has been pressed, the display will show “PASSED” or “FAILED”.  If passed, 

promptly put the sensor into a zero or low ppm O2 gas.  This will help extend the life of the sen-

sor and speed up the response time.  Sensor should be exposed to 

ambient air for less than 4 minutes.  If failed, repeat calibration steps.

Содержание OMD-501D

Страница 1: ...OMD 501D Trace Oxygen Analyzer 4045 E Guasti Rd 203 Ontario CA 91761 USA Web www sso2 com Phone 1 949 398 2879 E mail sales sso2 com OMD 501D Manual Rev 1 3 1_2015 Instruction Manual...

Страница 2: ...nnections 2 6 Installing the Oxygen Sensor using the H3 Flow Through Sensor Housing 2 7 Installing the Oxygen Sensor using the H1 KF40 Sensor Housing 3 1 Understanding the Controls and Their Operation...

Страница 3: ...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 The active components...

Страница 4: ...ight Dimensions 1 4 DIN 96 x 96 x 65mm Enclosure Flush Mount ABS Classification General Purpose Temperature 0 50 deg C Alarms 2 Adjustable NO or NC Power 12 28 VDC or 100 240VAC Signal Output 4 20mA R...

Страница 5: ...he 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 The analyzer is shipped with all materials needed to install an...

Страница 6: ...ts The OMD 501D is designed as an indoor unit For field installations please refer to the NEMA4X IP66 en closure option offered by Southland Sensing Ltd Refer to part 3 operation section of this instr...

Страница 7: ...sensor housing it is important to make sure the bottom portion of the sensor housing is mounted flat and the top portion of the sensor housing which is manufactured of nylon is at the top This will i...

Страница 8: ...e 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...

Страница 9: ...rom 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...

Страница 10: ...he 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 th...

Страница 11: ...tion or SPAN CAL To adjust set or use the delay mode of the two onboard user programmable Alarm Relay Contacts All features are programmable selectable through the MENU bottom The UP DOWN arrows will...

Страница 12: ...0 1000 ppm 3 VDC Range 4 0 1 4 VDC Range 5 0 25 5 VDC From the HOME screen press the MENU key and the display will indicate Use the UP DOWN keys to move the cursor to allow the user select AUTO RANGE...

Страница 13: ...ercent value based on your alarm set point Press ENT once selected From here you can use the UP DOWN arrows to adjust each digit which is highlighted in red Simply hit the enter button to move the cur...

Страница 14: ...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 Si...

Страница 15: ...ts are firmly touching the gold pogo pins on the housing The H1 sensor housing alread has a hole at the bottom of the sensor that exposes the sensing surface to ambient air Let the reading stabilize f...

Страница 16: ...tood 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 Connect the gas sample line and set the pressur...

Страница 17: ...he sensor No tools are required to replace the sensor Simply unscrew Counter Clockwise the collar H3 flow through sensor housing or top portion H1 KF 40 sensor housing Once free open the top portion o...

Страница 18: ...ide or Acetic Acid electrolyte Lead anode Handling Rubber or latex gloves safety glasses Storage Indefinitely Physical Properties Boiling Point Range KOH 100 to 115 C or Acetic Acid 100 to 117 C Melti...

Страница 19: ...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 cor...

Страница 20: ...pm 0 100ppm 0 1000ppm 0 1 0 25 Power 12 28 V DC 100 240 V AC Alarms 2 Adjustable High Low with Delay Mode Analog Output 4 20mA Isolated Range ID 1 5VDC in 1VDC increments Display Color with Backlight...

Отзывы: