ECO SENSORS, INC. OZONE SWITCH™ Model OS-1X
Contents
1. can result The green LED should light up If it does not this is a strong indication that the instrument is not receiving the correct DC power Be sure the polarity is correct and that the connections are made It is recommended to test the instrument for positive response with an ozone generator when the instrument is received and again at the site where the instrument is installed Eco Sensors Inc offers inexpensive battery operated hand held ozone generators for test purposes Readjust the set point if required See drawing on other side It is not recommended to be set below 03 ppm 30 ppb because of many uncontrollable environmental influences below 03 ppm The higher the set point within allowable health limits the fewer false alarms The dead band is the difference in ozone concentration between where the instrument detects red LED lights relay switches and where the relay switches back and the red LED goes out Going on is always at a higher ppm than returning to off in order to avoid system chatter if an ozonator is being controlled As shipped the instrument has a dead band of less than 01 ppm Contact Eco Sensors for the procedures to make a larger dead band You can now connect the Ozone Switch to external devices such as an ozonator to be controlled or an alarm circuit Disconnect the power to the generator control wiring and the DC power to the instrument while connecting the wiring Bri2. the instrument yourself Do not clean the instrument with cleaning chemicals or solvents Clean it with a damp cloth Do not operate the instrument near heavy aerosols spray usage or where oxygen is being administered Call a qualified electrician if you have any doubts about voltage When in doubt operate the instrument at least 24 hours in your worst case environmental condition to see if it will operate properly in your conditions Do not operate the instrument or rely on its reading where there are high concentrations of Chlorine or other halogen compounds e Sulfer compounds e Nitrides of nitrogen NOx Urine residues or ammonia compounds Acid gases such as sulfuric or nitric acid fumes When in doubt operate the instrument at least 24 hours in your worst case environmental condition to see if it will operate properly WARRANTY This product is warranted against defects in materials and workmanship for one year following the date of purchase by the original owner This warranty does not include damage to the product as a result of misuse accident damage modifications or alterations and it does not apply if the instructions in this manual are not followed If a defect develops during the warranty period Eco Sensors at its election will repair the instrument or will replace it with a new or reconditioned model of equivalent quality In the event of replacement with a new or reconditioned model the replaceme
3. ECO SENSORS INC OZONE SWITCH Model OS 1X INSTRUCTIONS FOR USE The model OS 1X acts like a thermostat to control ozone generators and alarms based on an adjustable ozone set point The standard available range is 03 1 The design incorporates hysteresis or a dead band to avoid system chatter The SPDT relay contacts will handle up to 5 amps at 250 volts or up to a 1 8 HP motor The OS 1X should not be used outdoors or in the presence of NOx nitric acid acid gases or strong halogen fumes Overnight warm up is recommended if the instrument hasn t been powered for weeks The instrument is conditionally warranted for one year Save a copy of your purchase document as a proof of purchase and date and read the warranty statement at the end of this manual Allow 15 minutes warm up before attempting to test the instrument and at least one hour before using the instrument Overnight warm up is recommended if the instrument hasn t been powered for weeks OPERATION First verify that the instrument is working as received Connect your AC adapter to the power jack or your 12 24 V DC supply to terminals 1 and 2 of the terminal block found on the inside back of the instrument Caution Many AC adapters and DC supplies deliver a higher voltage than on the nameplate 24 volts can be 32 volts etc Verify that the voltage to the input does not exceed 24 volts and that it is not AC In either case major damage to the instrument
4. ZONE SWITCH ON DUCTS AND EQUIPMENT CABINETS OS 1X SENSOR OR THROUGH OTHER COVER HOLE Hole should be 500 12 5 to easily allow clearance to the sensor WIRING 3 16 dia 4 7 mm Air Duct Equipment Cabinet etc lt 750 gt SENSOR 19 0 Squeeze fit in cover hole 1 438 4 36 5 CAUTION Avoid excessive touching of the inlet end of the sensor and keep it free from chemicals lubricants dust water etc Do not use silicone caulking compound or RTV near the sensor approx 1 16 1 8 or2 5mm RECOMMENDED ACCESSORIES FOR THE OS 1X OG 2 Ozone Source Calibrator Precision UV lamp calibrated ozone source Generates 1 ppm reference concentration Battery operated Small and simple to use EE 2 Environmental Enclosure For dust and water protection in industrial and agricultural environments and in public places This enclosure is 120 mm wide 180 mm high and 80 mm deep 5 x 7 x 3 with a clear polycarbonate gasketed front cover There are screened air inlets on the sides and an exhaust fan on the bottom A 12 volt DC power jack provides power to the instrument and fan inside More information about our products and applications at www ecosensors com
5. ng the external wiring through the top or bottom access holes of the instrument or the access hole in the back plate Wire generator control circuits only to terminals 3 4 and 5 of the terminal block Allow free airflow in front of the instrument where there are fan holes Otherwise the calibration will be affected Also do not leave oils solvents or greases on in or near the instrument Their fumes can cancel the instrument s ozone responsiveness It is recommended to mount the instrument with the sensor facing down to avoid water and dust getting into the sensor area and damaging the sensor The sensor may also be squeeze fitted into one of the two large back cover holes if you want the sensor to face into an air duct via a hole made for it See drawing on the reverse side of this manual CALIBRATION The Ozone Switch is shipped from the factory calibrated to detect at 1 ppm Lower values than that are settable by the calibrated control found by opening the back cover The calibration should be within 20 over 03 1 ppm We do not recommend operating with a set point for detection below 03 ppm because too many chemical atmospheric and electronic variables can collectively make lower set points meaningless and unreliable Also many indoor environments may have ozone levels of up to 03 ppm due to ozone in the outdoor air leaking in etc The sensor is stable If however it does drift the tendency usually is to more sensitivity
6. nt unit will continue the warranty of the original unit To return the instrument contact your distributor or call Eco Sensors at 800 472 6626 or e mail to sales ecosensors com to receive return instructions and a Return Authorization RGA number Except as provided herein Eco Sensors makes no warranties express or implied including warranties of merchantability and fitness for a particular purpose Eco Sensors shall not be liable for loss of use of this instrument or other incidental or consequential damages expenses or economic loss or claims for such damage or economic loss This warranty gives you specific rights and you may also have other rights which vary from state to state RECORD YOUR SERIAL NUMBER HERE KEEP THIS MANUAL AND WARRANTY FOR YOUR RECORDS Eco Sensors is a registered trademark of Eco Sensors Inc Ozone Switch is a trademark of Eco Sensors Inc Eco Sensors Inc 2000 Revision 1 For OS 1X REV 1 OZONE SWITCH WIRING AC POWER ELECTRICAL BOX Set Point Adjustment Scale 7 RRM TERMINAL BLOCK Do Not Use Below 30 03 PPM 30 03 50 05 100 10 OZONE SWITCH Back cover removed PLUGS INTO ELECTRICAL BOX OZONE GENERATOR TERMINAL BLOCK WIRING TERMINALS CONNECTIONS 4 5 RELAY NORMALLY CLOSED 3 4 RELAY NORMALLY OPEN 1 2 DC POWER ALTERNATE TO POWER JACK SUGGESTED WIRING ELECTRICAL BOX AND OZONE GENERATOR ARE NOT SUPPLIED BY ECO SENSORS MOUNTING THE O
7. ontacts rating SPDT non latching 5 amps 250 volts AC or 1 8 HP inductive load Terminal block 20 amp rating 12 22 AWG wire range Size 3 x 2 1 2 x 1 5 8 76 x 64 x 42 mm Weight 5 oz 140 grams Conformity This product conforms to the European Community CE requirements for emissions EMI and interference immunity SAFETY FEATURES Loss of power protection relay opens shuts off generator when the instrument loses power Enclosure Flame retardant ABS UL approved Relay UL and CSA approved Electrical a Circuits operate at 24 volts 100 mA or less b Power input circuitry includes automatically resetting fuse polarity reverse protection diode and overvoltage protection diode PRECAUTIONS Allow atleast 15 minutes warm up for functionality testing one hour warm up for operations testing and overnight if the instrument hasnt t been used in for weeks Read all of the instructions in this manual Keep the instrument dry Never let water or other liquids into the sensor which is just behind the gas inlet Do not drop the instrument or subject it to continuous vibration Do not store or operate the instrument in high levels of dust e Operate the instrument in areas of normal room temperature Operation at lower temperatures such as warehouses or refrigerated areas should only be attempted after testing in any particular environment for correct and reliable operation e Do not attempt to service
8. ppm calibrator Small variations can be compensated for by a calibration adjustment or simple maintenance Sensor replacement however requires an instrument technician and should be done by Eco Sensors or its authorized service representative The sensor replacement is part number SE 6A An OG 2 Calibrator will be needed for user replacement AC POWER ADAPTERS The Ozone Switch will not operate properly if it is not receiving 12 24 V DC at 200 mA Check your power supply circuit or AC adapter to ascertain that it is on and is supplying the correct power AC adapters can burn out during lightning strikes or other electrical surges but this is very unlikely that the Ozone Switch will completely fail during such surges due to its extensive input power protection circuitry Eco Sensors can supply AC adapters for North America Elsewhere AC adapters should be purchased through our distributors or locally using specifications supplied by Eco Sensors SPECIFICATIONS Sensor Heated metal oxide semiconductor Standard operating range 03 1 ppm 05 1 ppm is the recommended set point range Accuracy 10 20 in the 05 1 ppm range Response time Within 10 seconds of when ozone reaches the sensor Temperature and humidity range 65 90 deg F 18 32 deg C See Precautions For indoor use only 0 80 relative humidity Supply voltage required 12 24 volts DC 200 mA Ground Adapter plug 5 5 mm 2 5 mm female center Relay c
9. thereby effectively lowering the set point If the sensor fails one of its internal wires break it will always be high with the red LED on and the relay actuated The calibration will also be affected by greases oils solvents and other VOC generators in the area sensitivity will appear to be reduced or by oxidizing chemicals such as acid gases sensitivity will appear to be increased Note that the instrument should be recalibrated after changing the sensor and at least annually Rough check of the instrument s functionality should be made every three months by presenting it with ozone and verifying that it detects Our OG 2 Ozone Source Calibrator is recommended for this GREEN LED RED LED Instrument receiving On when ozone power concentration is above set point CE AC ADAPTER MOUNTING HOLES 4 7 MM 3 16 DIA 73 MM 2 7 8 CENTERS OZONE SENSOR See other side of this manual for alternate mounting locations DC POWER JACK 12 24 V 200 MA CTR Power can also be connected by rear access terminal block SERVICE AND MAINTENANCE Do not attempt to do board level repairs yourself This will void the warranty SENSOR The sensor and the fan are the only components of the instrument that are likely should be observed to see if it is responsive to changes in ozone level and if it detects at the set level This can be done with the Eco Sensors models OG 1 hand held ozone generator or OG 2 1
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