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ANALOX 3D - Carbon Monoxide Detector User Manual

1. ANALOX looking after the air YOU breathe ANALOX 3D Carbon Monoxide Detector User Manual Analox Sensor Technology Lid 15 Ellerbeck Court Stokesley Business Park North Yorkshire TS9 5PT T 44 0 1642 711400 F 44 0 1642 713900 W www analox net E info analox net ANALOX 3D Analox 3D Carbon Monoxide Detector User Manual 1 GENERAL DESCRIPTION 1 1 1 2 1 3 1 4 1 5 The Instrument is designed to measure and indicate the concentration of Carbon Monoxide CO in the gas sample presented to its input port The range of measurement can be specified by the user but the present design is configured for 0 to 50ppm with a resolution of approximately 0 3ppm The Instrument is powered from an external supply having a voltage range from 9v to 26v Current consumption is approximately 30 milliamps The Alarm circuit incorporates a low voltage relay which has volt free contacts permitting connection of remote warning devices The relay is configured in the Fail Safe mode ie it is energised in the Non Alarm state and releases in any alarm condition or in the event of a power failure The Instrument is housed in an ABS box measuring 160mm x 80mm x 85mm the entire electronics being built in the lid of the box to permit easy installation and servicing CO concentration is measured using an Electro Chemical sensor followed by high grade amplification The resultant electrical signal is then passed to a
2. Membrane keys on the front panel just to the left of the display marked MODE UP DOWN and ENTER The keys carry out simple functions allowing the Zero and Span calibration points to be entered The information entered during this procedure is stored in Non Volatile Memory which means that it is not lost when the Instrument is switched off or when the battery is being replaced The basic Key functions are a MODE Key is used to Initiate the calibration process It also acts as an Abort key if say the Calibration process is entered accidentally or the user realises that a wrong value has been entered and he wishes to cancel the operation b UP Key is used to Increment the displayed value during the Span Calibration process 1 is added to the displayed value each time the key is pressed and released C DOWN Key is used to Decrement the displayed value during the Span Calibration process 1 is subtracted from the displayed value each time the key is pressed and released d ENTER Key is used to confirm the end of each step in the Calibration procedure When pressed and released it automatically advances the calibration process to the next level During the first two stages of the calibration procedure a 3 digit number will appear on the display These numbers DO NOT actually mean anything to the user they are only used to indicate a Steady input condition Setting Zero Connect a source of
3. Microprocessor which carries out the following functions a Linearisation of the signal using Calibration constants b Conversion of the signal into a form suitable for the Instrument Display c Monitoring for an Alarm condition with reference to a preset level d Provide facilities for Audible and Visual Gas Alarms e Provide Simple means of user Calibration f Provide Authorised Personnel access to change the Alarm Setpoint Document Ref 3D 800 02 January 2009 Page 2 AN ALOX looking after the air YOU breathe Analox 3D Carbon Monoxide Detector User Manual OPERATION 2 1 SWITCHING ON 2 1 1 When the Instrument is first switched on it carries out a self test procedure and during this operation the Display will show the word tESt This procedure takes about 5 seconds This is followed by a 20 Second period to allow the electro chemical sensor to stabilise during which the Display is Clamped to read 000 0 After this time the Instrument is ready to monitor the input gas Carbon Monoxide concentration in the input sample is indicated on the 4 Digit LCD display 2 2 GAS ALARM 2 2 1 2 2 2 2 2 3 2 2 4 As long as the measured CO concentration remains Below the pre set alarm level the relay will be Energised and the Normally Open Contact will be connected to the Common Contact The Alarm LED and Audible alarm will be inactive If the CO concentration exceeds the pre set alarm level
4. a refund of net purchase price paid as per our Invoice on initial purchase from us We shall have no liability for losses damages costs or delays whatsoever We shall have no liability for any incidental or consequential losses or damages All express or implied warranties as to satisfactory or merchantable quality fitness for a particular or general purpose or otherwise are excluded and no such Warranties are made or provided save as set out in this Clause 7 In order to effectively notify a Warranty claim the claim with all relevant information and documentation should be sent in writing to Analox Sensor Technology Limited 15 Ellerbeck Court Stokesley Business Park Stokesley North Yorkshire TS9 5PT Or by e mail to info analox net Or by Fax to 44 1642 713900 We reserve the right to require from you proof of dispatch to us of the notification of Warranty claim by any of the above alternative means The equipment should not be sent to us without our prior written authority All shipping and Insurance costs of returned equipment are to be born by you and at your risk All returned items must be properly and sufficiently packed Document Ref 3D 800 02 January 2009 Page 9 AANALOX looking after the air YOU breathe
5. and releasing the UP Key will add 1 to the displayed value and pressing the DOWN Key will subtract 1 from the displayed value Use the UP and DOWN keys to change the displayed reading to match the actual concentration of the Air CO mixture being used When the Air CO concentration reading is correct press the ENTER key and the process is complete Note that there are built in Upper and Lower limits for the Air CO gas concentration These are set at 60 ppm and 25 ppm respectively Values outside these limits cannot be entered during the process in 2 3 8 2 3 10 The data collected during the Calibration process is not actually transferred to the Non Volatile memory until the final operation of the ENTER key in step 2 3 8 The procedure may be Aborted at any time up to this point simply by pressing the MODE key The data entered during the previous calibration will then be used to linearise the measurement 2 3 11 Pressing the keys in combinations other than as described above will have no effect on the Instrument s operation During the operation of the Keys the actual effect of the key only takes place when it is Released Document Ref 3D 800 02 January 2009 Page 5 AANALOX looking after the air YOU breathe Analox 3D Carbon Monoxide Detector User Manual 3 MAINTENANCE 3 1 1 Sensor Replacement The Electrochemical Sensor has a life in air of about 18 months However this will be shortened if it
6. is constantly subjected to Carbon Monoxide particularly high concentrations SAFETY WARNING THE SENSOR CONTAINS CORROSIVE ELECTROLYTE AND MUST NOT BE OPENED OR THE SEALED MEMBRANES REMOVED EYE AND HAND PROTECTION MUST BE WORN IF THE SENSOR IS LEAKING WIPE AND FLUSH ANY ELECTROLYTE SPILT ON SURFACES ELECTROLYTE CAN BE FATAL IF SWALLOWED 3 1 2 Switch off the Instrument and remove the battery and DC supply connector Undo the four corner screws in the front panel they are captive in the front panel and carefully withdraw the panel from the housing body Disconnect the wiring loom from the front panel by releasing the small retaining clips on the 2 x White plastic connectors and remove the front panel Locate the Sensor Cell this is a 32mm diameter component at the end of the printed circuit board Itis a plug in device having 4 small pins Carefully ease the sensor out of its 4 sockets 3 1 3 Replacement sensors are supplied in a Gas tight package which should NOT be opened until they are to be fitted in an Instrument Examine the New sensor and note that there is a thin spring shorting clip fitted to three of the gold pins Remove this spring clip and carefully fit the New sensor in to the 4 PCB sockets ensuring that it is secure Check that the O ring seal is correctly located on the front of the sensor and that there is no foreign matter on the face of the seal At this point it is a good policy to make a note of the sensor serial
7. is limited to Authorised Personnel It is recognised that different Countries use different limits and this instrument can have its setpoint adjusted to any level between 5 and 15 ppm CO in Air to a resolution of 1 ppm PROCEDURE Switch off the Instrument and whilst holding down the UP Key switch on again Release the UP Key The Display will show A010 where 010 is the default value in ppm of the Gas Alarm Setpoint Use the UP or DOWN key to increase or decrease the setpoint within the limits of 5 15 ppm When the desired value is displayed press the ENTER key The Instrument will then return to its normal Power On and test routine Note that the new setpoint is recorded in Non Volatile Memory when the ENTER key is pressed and will be used during all subsequent operations until it is changed again ENTERING CALIBRATION DEFAULT VALUES If for any reason the Instrument has become mal adjusted due to incorrect operating procedure or other reason and Calibration gas is not available to allow a correct Re calibration procedure to be carried out a set of Default calibration parameters can be inserted into the Instrument memory This will allow the Instrument to at least operate correctly but with possible reduced accuracy since the values entered will be the theoretically ideal values and not the real values as seen during a Calibration procedure PROCEDURE Document Ref 3D 800 02 January 2009 Page 7 AA
8. number and enter the date of replacement in a record book so that the next replacement may be anticipated 3 1 4 Refit the White plastic connectors on the front panel and refit the front panel to the housing body checking that the orientation is correct ie that the sensor will mate with the gas flow adaptor in the housing body Secure the 4 corner screws and re fit the battery and power supply connector 3 1 5 Switch on the Instrument and allow the new sensor to settle for about 30 minutes then carry out a full calibration procedure as described in section 2 above 3 1 6 There are no other User Serviceable parts in the Instrument If the Instrument fails to perform as expected then contact your Distributor for assistance Document Ref 3D 800 02 January 2009 Page 6 AANALOX looking after the air YOU breathe Analox 3D Carbon Monoxide Detector User Manual APPENDIX A IT IS VERY IMPORTANT THAT THE FOLLOWING ROUTINES ARE ONLY CARRIED OUT BY AUTHORISED PERSONNEL THEY DIRECTLY AFFECT THE ACCURACY OF THE INSTRUMENT IN A WAY WHICH WILL NOT BE OBVIOUS TO THE USER IF EITHER ROUTINE IS IMPLEMENTED THEN THE OPERATION SHOULD BE RECORDED FOR FUTURE REFERENCE RESETTING THE ALARM POINT Since the Safe working limits for Toxic Gas Concentrations are laid down by Health and Safety organisations and the alarm setpoints are related to these limits it is recommended that access to the procedure for changing the setpoint
9. then the following actions will take place a The Relay will De energise resulting in the Common Contact connecting to the Normally Closed Contact and breaking the connection to the Normally Open Contact b The Alarm LED will be turned On C The Audible Alarm will be activated These conditions will prevail until the measured CO concentration drops 1 ppm below the alarm setpoint The difference between the points at which the alarm triggers and clears is called Hysteresis and is used to stop the Instrument going rapidly in and out of alarm when measurements are being taken at or very near the setpoint The Alarm Setpoint value depends on Local Health and Safety regulations and varies depending on Country of use The Instruments are normally pre set at the factory to 10ppm but Authorised Personnel may be instructed on the procedure for changing this setting See Appendix A to this document Document Ref 3D 800 02 January 2009 Page 3 ANALOX looking after the air YOU breathe Analox 3D Carbon Monoxide Detector User Manual 2 3 CALIBRATION 2 3 1 2 3 2 2 3 3 2 3 4 2 3 5 2 3 6 This is a fairly simple procedure which requires a source of clean CO free air or Nitrogen and a mixture of CO Air of concentration around 50ppm CO IT SHOULD BE CARRIED OUT WITH CARE SINCE THE ACCURACY OF THE SUBSEQUENT READINGS IS ONLY AS GOOD AS THE ACCURACY OF THE LAST CALIBRATION The procedure uses the Four
10. Clean Air or Nitrogen to the Calibration or Gas Inlet and adjust the flow rate to between 30 and 60 Litres Hour Press and release the MODE Key Once The Display will show three short horizontal bars in the Left hand digit position followed by three numbers As the Zero gas flows the numbers on the display will change Wait until the reading is steady the right hand digit may flicker 1 Digit and then press the ENTER Key The Display will change to show Cxxx where xxx are the three digits which were displayed before the ENTER key was pressed Document Ref 3D 800 02 January 2009 Page 4 AANALOX looking after the air YOU breathe 2 3 7 NOTE 2 3 8 2 3 9 Analox 3D Carbon Monoxide Detector User Manual Setting Span Connect a source of Air CO having a concentration of around 50ppm CO and adjust the flow rate to between 30 and 60 Litres Hour Observe the display and ensure that the numeric value is increasing Wait until the reading is steady this should occur at about 200 with a 50ppm Air CO mixture When the reading is steady press and release the ENTER key The Display will then change to show E050 If a reading of between 180 and 240 cannot be achieved then the sensor is probably exhausted The Calibration procedure should be aborted by pressing the MODE key and the Sensor should be replaced See Section 3 Page 4 Setting the Gas Concentration When the Display is showing E050 pressing
11. NALOX looking after the air YOU breathe Analox 3D Carbon Monoxide Detector User Manual Switch off the Instrument and whilst holding down the ENTER Key switch on again Release the ENTER Key The Display will show dFLt Press the ENTER Key again and the Default values will be transferred and the Instrument begin its normal start up procedure NOTE THE DEFAULT VALUES WILL REMAIN IN USE UNTIL THE NEXT FULL CALIBRATION ROUTINE IS CARRIED OUT Document Ref 3D 800 02 January 2009 Page 8 ANALOX looking after the air YOU breathe Analox 3D Carbon Monoxide Detector User Manual WARRANTY INFORMATION We provide the following Warranties for the Analox 3D A 1 year sensor warranty A 1 year electronics warranty In both cases the Warranty period runs from the date of our Invoice We warrant that the equipment will be free from defects in workmanship and materials The Warranty does not extend to and we will not be liable for defects caused by the effects of normal wear and tear erosion corrosion fire explosion misuse use in any context or application for which the equipment is not designed or recommended or unauthorised modification Following a valid Warranty claim in accordance with the above the equipment upon return to us would be repaired or replaced without cost or charge but in our discretion we may elect instead to provide to you which ever is the lesser of the cost of replacement or

ANALOX 3D - Carbon Monoxide Detector User Manual

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