ECO SENSORS, INC. OEM OZONE CONTROLLER Model OEM-1
Contents
1. 10 g 3 oz Shipping weight Both modules and 2 meter sensor extension cable no adapter 454 g 1 Ib PRECAUTIONS Read all instruction in this manual Review safety procedures in testing and operating this system Call a qualified electrician if you have any doubts about voltages wiring electrical codes and practices etc Keep the boards and sensor dry Never let water or other liquids into the system Do not drop the boards Damage may not be immediately obvious Operate this system in areas of normal room temperature Operation at lower temperatures such as warehouses or refrigerated areas should only be attempted after testing in the proposed environment for correct and reliable operation Do not attempt to service the instrument yourself Do not operate this system or rely on its operations where there are high concentrations of e Chlorine or other halogen compounds e Sulfur compounds e Nitrides of oxygen NOx e Urine residues and ammonia compounds Acid gases and vapors such as sulfuric or nitric acid fumes When in doubt operate the system at least 24 hours in your worst case environment LIMITED WARRANTY This product is warranted against defects in materials and workmanship for own year following the date of purchase by the OEM This warranty does not include damage to the product as a result of misuse damage modifications or alterations and it does not apply if the instructions in this manual are not2. should not be used outdoors or in the presence of NOx nitric acid acid gases or halogen compound fumes Allow warm up according to the table below At least 24 hours is recommended if the system hasn t been used for a week or so This is because the sensor can absorb VOCs when it is not in use INSTALLATION CAUTION The OEM 1 has exposed high voltage 110 220 V solder points on the reverse side of the board from the large transformer Do not connect high voltage AC power until you have arranged the board so as not to touch these points It is best to bench test the board with a 12 VDC supply see below Do not let solder connections on the OEM 1 board short circuit to any metal surfaces The OEM 1 should be attached to your equipment such as inside the ozone generator by four mounting holes Select four that align with your equipment and which stabilize the OEM board The board surface on the solder side should be kept at least 6 mm 1 4 from any metal surface The OEM 1 board should be wired to your power by the terminal block terminals 2 and 3 for 110 V 60 Hz or 220 V 50 Hz according to the power transformer wiring jumper diagram found in these instructions Alternately you can power the unit by 12 V DC via jack J2 This low voltage power option was provided especially for bench testing the OEM 1 without exposing personnel to high line voltages The Eco Sensors P 20 AC adapter a purchase option can be used to provide 12 VDC whe
3. 625 66 675 3 125 79 375 3 500 88 900 3 850 97 790 oun in N s ca Sn 2 on Fa eon 4 o O oo S 0 875 22 225 0 662 16 828 0 263 6 668 0 000 0 000 CCCII 0 250 6 3 50 CISSA SSS s LIII RO M ou nt in g su rf ace Installation Notes Terminal Block Pinout 1 Line voltage is present on the board around terminal block TB1 Allow at least 0 250 inches 6 35 mm clearance behind board 2 All mounting holes are connected to circuit ground and also to position 1 of terminal block 3 Maximum component height above board mounting surface is 0 875 inch 22 25 mm 4 Sensor plug is shown mounted directly to main circuit board however extension cables may be used for remote mounting 5 Potentiometer R14 controls detector switching threshold In standard configuration 100 of scale equals 0 1 PPM 6 LED D1 yellow is illuminated when detected level is greater than threshold seting and relay is energized after time delay 7 LED D2 green is illuminated when detected level is less than threshold setting Responds quickly to changes 8 Connector J2 may be used to supply DC power 12 Volts nominal center pin positive to board for bench testing to reduce shock hazard 9 Jumper pads on back of board may be used to select line voltages of 110 or 220 VAC and to tie relay contacts directly to line supply 10 Mounting holes are 0 125 3 175 mm diameter Maximum outer diameter for screws standoffs washers et
4. ECO SENSORS INC OEM OZONE CONTROLLER Model OEM 1 INSTRUCTIONS FOR USE The model OEM 1 is a system to control ozone generators and alarms based on an adjustable ozone concentration set point It is designed to work with plug in sensor modules for O 1 ppm 0 1 ppm and 0 10 ppm These are specified when ordering by putting the ppm range after the model number For example a 1 ppm OEM 1 board system would be OEM 1 1 and the replacement sensor module for it would be SM 1 1 These same sensor modules also work in our OEM 2 boards which have advanced features such as 4 20 mA output The sensors modules can also be located at a distance from the OEM 1 boards by 2 or 8 meter cables These are readily available DIN M F 5 pin extension cables One component of the OEM 1 system is the base board which incorporates the power supply final signal processing set point controls and the output relay The other component is the sensor mounted with its associated electronics in a cylindrical DIN plug This is precalibrated in our lab so that the sensor module and main board module together work as a calibrated system If the sensor module is damaged it is simply replaced by another precalibrated module The design incorporates hysteresis and time delay set at 8 seconds except for special orders to eliminate chatter and other excessive interactions between the sensor and generator The SPDT relay contacts will handle up to 5 amps at 250 volts The OEM 1
5. c is 0 25 inch 6 35 mm 1 Ground chassis 2 AC line neutral 3 AC line hot 4 Relay normally closed conatct 5 Relay common 6 Relay normally open contact Note Board may be jumpered to connect relay common to AC line hot without external connection to terminal number 5 NC and NO contacts will thus provide switched AC for direct control of external devices
6. commend operating with a set point for detection below 30 of full scale because too many chemical atmospheric and electronic variables can collectively make lower set points inaccurate and unreliable A rough check of the instrument s functionality and calibration in abusive environments should be done every three months This can be easily done with our model OG 2 Ozone Source Calibrator if the check is at 1 ppm CARE AND USE OF THE SENSOR The sensor which protrudes from the end of the sensor module is a heated metal oxide HMOS sensor It incorporates the latest IC and micromachining technology in its construction so it is very stable and rugged It can easily lose its calibration at least until it is burned in again if it is exposed to any VOC chemicals and fumes especially if it is exposed to these when it is not powered These harmful fumes and chemicals include grease and oils finger oil strong deodorants solvent fumes sulfur compounds and the like The sensor cannot be user calibrated It should be recalibrated by an authorized distributor or by the factory If it is damaged a new sensor module must be purchased The sensor module can be plugged into the main board directly It can be extended up to about 8 meters using standard DIN M F extension cables not mini DIN available from most computer supply distributors CALIBRATION The sensor is calibrated in the sensor module by comparison with an NIST traceable UV analyze
7. followed If a defect develops during the warranty period Eco Sensors at its election will repair the product or replace it with new or reconditioned product of equivalent quality In the event of replacement with a new or reconditioned product the replacement will continue the warranty of the original model To return this system or any module of it call your distributor or OEM OEMs and distributors call Eco Sensors at 800 472 6626 or e mail at sales ecosensors com to receive return instructions and a Return Goods 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 RECORD YOUR SERIAL NUMBER HERE KEEP THIS MANUAL AND WARRANTY FOR YOUR RECORDS Eco Sensors is a registered trademark of Eco Sensors Inc Eco Sensors Inc 2000 Rev 3 02 OEM 1 Ozone controller board application notes Eco Sensors Inc Santa Fe NM USA 3 250 82 550 3 125 79 375 2 625 66 675 R14 Setpoint adjust Sensor Element 0 400 10 16 typical diameter 1 625 41 275 Transformer D2 Green On when below setpoint 0 625 15 875 D1 Yellow On when relay energized 0 125 3 175 0 000 0 000 2
8. me delay is determined by the value of C6 a tantalum capacitor Removing that capacitor will eliminate the time delay Time delays can be selected by multiplying a proposed Tantalum capacitor value by 75 For example 4 7uF value for C6 would give about a 3 5 second delay When the generator or other equipment is turned off if possible it is best to wire the units so that the OEM 1 board is always powered The sensor will stay heated and burn off any chemicals it would otherwise absorb When the ozone generator or other equipment is turned back on the OEM board is ready to respond immediately and accurately Otherwise warm ups are required Recommended warm up times are Time Since Last Powered Warm up Time 1 minute 3 days 10 minutes 3 7 days 1 hour More than 1 week 24 hours If the sensor is easily accessible the warm up time can be minimized by checking for full response by an ozone generator of known output The Eco Sensors OG 2 Ozone Source Calibrator is a portable battery operated source which is designed to check for response at 1 ppm OVER OPERATION The OEM 1 is calibrated at the factory by comparison with a NIST traceable UV analyzer Lower detection points can be set by the calibrated dial pot R 14 on the main board Its numbers represent percentage of ppm For example 50 on the dial pot is 50 of 1 or 05 ppm 50 ppb The calibration as a percentage of 1 ppm should be within 20 over 03 1 ppm We do not re
9. n 120 VAC 60 HZ is available For 220 V 50 Hz power you will have to purchase an adapter locally with specifications according to our Tech Note P 101 The complete terminal block wiring is Terminal 1 Circuit board ground AC power connection neutral AC power connection hot Relay normally closed contact N C Relay common Relay normally open contact N O DARON A typical ozone generator control would be for the hot wire to the primary of the generator high voltage transformer to be broken and connected through terminals 4 and 5 of the terminal block This is the normally closed N C relay contact Terminals 5 and 6 are a normally open N O circuit and could be used for example to connect to remote alarm circuits To run AC power hot via the OEM 1 relay to the ozone generator high voltage transformer primary solder a jumper to connect the two pads under the board that are connected to the terminal block s terminals 3 and 5 If the sensor is not in a high ozone concentration or hasn t warmed up green LED D2 will illuminate and will serve for start up as a pilot light The yellow LED D1 illuminates when the relay is activated in response to high ozone This will happen after a time delay programmed into the OS 1 8 seconds is the factory setting if there are no purchase specifications to the contrary by the purchasing OEM The delay happens both when the generator is turned on and when it is turned off The ti
10. r The accuracy is within 20 at full sensor response AC ADAPTER For using low voltage power input such as for bench testing an AC adapter that delivers 12 volts at 300 mA should be used Its output plug to fit our jack should have the 5 5 mm 2 5 mm female specification jack center pin These are widely available worldwide For more complete specifications see our Tech Note P 101 SPECIFICATIONS Sensor Heated metal oxide semiconductor Range 0 1 ppm 0 1 ppm and 0 10 ppm available Accuracy 20 Sensitivity As low as 02 ppm for the 1 ppm module 1 ppm for the 1 ppm module and 3 ppm for the 10 ppm module These sensitivities will decrease if sensor module extension cables are used Response time Within 10 s of seconds Turn on turn off time delay 8 seconds standard Other times by request Temperature and humidity range The calibration is only valid for normal room temperature and humidity The circuit does not include temperature or humidity compensation devices Supply voltage required 110 VAC or 220 VAC per OEM specification Alternately 12 VDC at 300 mA Relay ratings SPDT non latching Contacts 5 amps at 250 volts AC Size of main board 83 X 83 mm 3 25 X 3 25 Required 23 mm 875 clearance from top surface of board and 6 mm 250 clearance from bottom surface of the board Main board mounting By 4 3 5 mm screws or 6 32 screws Sensor Module 16 mm dia X45 mm length 62 X 1 75
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