analox 1371 mk2 surveyor carbon dioxide monitor instruction manual
Contents
1. in an Infra Red path length between an Infra Red source and Infra Red detector Beer Lambert Law In practical terms the path length is chosen for the degree of absorption necessary to determine a particular band of concentration range of measurement and the gases can be identified by use of narrow band interference filters tuned to an appropriate characteristic absorption wavelength The family of Transducers used in the ANALOX 1371 MK 2 range of Instruments are based a measurement and reference sensor principle utilising sample path lengths of between 1mm and 100mm in length depending on the concentration to be measured and wavelength selection by carefully specified narrow band interference filter The source is pulsed at a regular frequency to produce an Infra Red carrier signal which is attenuated by Carbon Dioxide absorption and a detection system which converts this attenuation into an electrical output The electrical output from the transducer is then processed by additional electronic circuits to provide indication of concentration on an LCD Display and monitoring for Alarm conditions 1371 810 03 User Manual August 2007 1417 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR 8 WARRANTY amp REPAIR 8 1 WARRANTY We provide the following Warranties for the Analox 1371 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 that2. ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR Power Consumption 23 OUTPUTS Relays Analogue Output 2 4 MECHANICAL Tilt Effect Dimensions Weight Gas Connections 12V DC 18 VA Maximum Low Flow Alarm SPCO Contacts NO NC COM HI Alarm SPCO Contacts NO NC COM LO Alarm Contacts rated 7 Amp 250v AC Resistive 7 Amp 30v DC 4 20mA Maximum Load 300 Ohms Optional 0 to 1 Volt Minimum Load 5K Ohms Independent 296mm W 256mm 118mm 3 2 kg Suitable for 6mmOD 4mmID plastic Pipe NOTE DISPLAY RESOLUTION amp ACCURACY The Digital displays used in this series of instruments are of the 3 1 2 digit type The indicating accuracy of such a Display is limited to the resolution ie Plus or Minus the reading on the Least Significant Digit the right most Digit If the Quoted indicating range is 0 00 to 100 00 then when the display reads 0 00 the actual input signal could be between 0 004 and 0 004 The Least Significant Digit will change from 0 to 1 when the absolute value changes from 0 004 to 0 005 1371 810 03 User Manual August 2007 717 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR INSTALLATION AND COMMISSIONING INSTALLATION The 1371 Surveyor should be mounted on a vertical surface using 3 off M4 machine screws or No 8 woodscrews Make sure that the chosen mounting position allows sufficient room on the Left of the Instrument to permit the hinged front cover t
3. MK 2 SURVEYOR CARBON DIOXIDE MONITOR 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 8 2 REPAIR Apart from routine Calibration and filter changes there are no user serviceable parts inside the Instrument In the event of any suspected malfunction the user should check that all controls are in their correct position and if still experiencing problems contact Scottish Anglo E P or their Agent SAEP offer service and training courses for customers maintenance personnel and we strongl y recommend that this instrument be serviced by an SAEP trained engineer on a 6 monthly basis Further details may be obtained by contacting our Customer Service Department 1371 810 03 User Manual August 2007 1617 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR 8 3 TRANSDUCER REPLACEMENT The Infra Red Transducer CO Sensor is constructed as a complete Module which permits rapid relatively straightforward field replacement in the unlikely event of the Transducer requiring service It is strongly recommended that this operation is only carried out by personnel who have attended a relevant training course at Scottish Anglo
4. customers informed of any changes which they consider to be relevant to the continued satisfactory performance of their products The information in this document is given in good faith and believed to be correct at the time of publication The purchasers attention is drawn to our terms and conditions of sale a copy of which is available on request Further technical assistance may be obtained by contacting S A E P IMPORTANT SAFETY WARNINGS THESE WARNINGS MUST BE READ AND UNDERSTOOD BY ALL PERSONNEL CONCERNED WITH THE INSTALLATION OPERATION AND MAINTENANCE OF THIS INSTRUMENT The Instruments in the 1300 Range are NOT suitable for operation in a Hazardous Area as defined by the British Standard BS 5345 Part 4 ELECTRICAL SHOCK HAZARD WARNING The electrical power used in the 1300 Range of Instruments may be at a voltage sufficient to endanger life Before carrying out any maintenance or repair persons concerned must ensure that the equipment is disconnected from any Mains supply and tests made to ensure that isolation is complete When the supply cannot be disconnected functional testing maintenance or repair should only be undertaken by qualified persons who are aware of the precautions necessary when carrying out such operation 1371 810 03 User Manual August 2007 317 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR 1371 810 03 User Manual August 2007 417 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITO
5. or Qualified Electronics Engineer with guidance from Scottish Anglo E P Service Department The procedure is as follows 1 Remove power from the Instrument and open the clear plastic door cover Remove the 4 corner screws in the instrument front panel and carefully ease the front panel away from the housing The panel may be temporarily parked in the upper pair of guide slots located on the side members of the housing The Transducer is located in the lower right corner of the housing It is a metal box measuring approximately 115mm x 65mm x 30mm Remove the 6mm OD plastic tubes from the gas flow adaptor mounted on the top of the Transducer This operation is best carried out by inserting the jaw tips of a pair of thin nosed pliers between the end of the plastic tube and the hexagonal white part of the flow adaptor and gently levering the tube off the barbed connector Separate the two halves of the In Line connector located on the right of the Transducer The Transducer is secured to the baseplate by 4 x No 8 Self tapping screws Remove these screws and the Transducer may then be withdrawn from the Instrument housing Fit the replacement Transducer and re assemble the Instrument Switch on the power supply to the Instrument and allow it to operate for about 30 minutes Carry out a full Calibration routine as detailed in Section 5 of this manual The original Transducer should be returned to Scottish Anglo E P Ltd for furthe
6. the Full Scale Value of the particular Instrument When the settling time has expired the Instrument will display the concentration in the gas being drawn through the Transducer by the sample pump The Alarm setpoints should be checked and adjusted if necessary following the procedure outlined in Section 4 anda full Calibration carried out as detailed in Section 5 1371 810 03 User Manual August 2007 917 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR OPERATION ALARM SETPOINTS The Instrument incorporates two completely independent alarm circuits which may be adjusted by the user to any point within the full range of the instrument Both alarm circuits are configured to operate when the measured gas concentration Exceeds the setpoint ie they are High going alarms When an alarm condition occurs the appropriate Red LED HI or LO will start to flash the internal Audible device will sound and the associated relay will change state The Audible alarm may be silenced by pressing the MUTE button located just under the lower edge of the main panel This action also changes the LED from flashing to a steady illuminated state The relay and LED will remain in this condition until the measured concentration falls below the alarm setpoint at which time the relay will revert to its normal state and the LED will be turned off Adjustment of the setpoints is a simple procedure Locate the switch marked LO in the AL
7. 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 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 1371 810 03 User Manual August 2007 1517 ANALOX 1371
8. ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR ANALOX 1371 MK2 SURVEYOR CARBON DIOXIDE MONITOR INSTRUCTION MANUAL Analox Sensor Techn 15 Ellerbeck Court Stokesley Business Park STOKESLEY Cleveland TS9 5PT Telephone 44 0 1642 711400 Fax 44 0 1642 713900 1371 810 03 User Manual August 2007 117 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR LIST OF CONTENTS Section Page Number 1 INTRODUCTION vata 5 2 SPECIFICATIONS enrage aa a aaa Sac 6 21 GENERAD naene nei a ove ii e E a ee is iai 6 2521 OPFRA TONA r CaS EEEo E OE EEREN R ea 6 2 3 OUTPUTS rE ae oes obs Ses AN EE AE E Se eee eens 7 2A aaa a a iit he A ASN 7 3 INSTALLATION AND 1 amp amp 3 1 INSTALLATION ninte ie e e e chien eins Rees etnies 8 BD CONNECTIONS totes 9 3 3 COMMISSIONING 9 4 OPERATION astestas da E EE EV 10 4 1 AARM SETPOINT S ovens Staessen ss 10 5 CALIBRATION 11 5 1 GENERAL evens irae a E E aK AEE E 11 5 2 GALIBRATION PROCEDURE 11 6 MAIN
9. ARM ADJUST section of the front panel This device is normally spring biassed to its central position To read the present setpoint for the LO alarm press the switch to the right the setpoint is then shown on the display To read the present setpoint for the HI alarm press the switch to the left the setpoint is then shown on the display To adjust the setpoint hold the switch in the appropriate position and using the trimming tool provided or a small terminal screwdriver rotate the appropriate trimmer or LO until the desired setpoint is indicated on the Display Clockwise rotation increases the setpoint value Release the switch and repeat for the other alarm if required 1371 810 03 User Manual August 2007 1017 5 1 5 2 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR CALIBRATION GENERAL COMMENTS Calibration requires gases to be fed from cylinders of certified concentration These gases MUST NOT be delivered directly at cylinder pressure to the Instrument otherwise the internal pump will be damaged Scottish Anglo E P Ltd supply calibration kits for the 1371 Instrument comprising two cylinders of gas a cylinder mounted flowmeter with control valve and suitable tubing It is strongly recommended that this kit is used for Calibration If alternative calibration equipment is used precautions must be taken to limit the gas pressure and flowrate to a value not exceeding 1 0 Litres per Minute Under no circumstances m
10. R 1 INTRODUCTION The ANALOX 1371 SURVEYOR provides a clear Digital Display of Carbon Dioxide concentration in a gas sample It can be employed either as an ambient monitor using its internal pump to draw the sample or as an On Line monitor if the gas to be checked is flowing through a pipe The Instrument uses a State of the Art Infra Red Analyser with no electro mechanical moving parts designed to meet the demand for accurate measurements of Carbon Dioxide where performance and quality are essential Ranges of measurement available are as follows Range Part Number 0 100 SA1 003 BG88 N002 0 20 SA1 003 BE87 N002 0 10 SA1 003 BD86 002 0 5 SA1 003 89 3002 0 2 SA1 003 BB90 002 0 1 SA1 D03 9 N002 0 0 5 SA1 D03 SA92 N541 Two completely independent user adjustable alarm circuits are incorporated the setpoints of which are accessible on the front panel and adjustable over the full range of the Instrument Both audible and visual indication is provided at the onset of an alarm condition and volt free relay contacts are available for connection of external warning devices The Instrument is housed in a high impact glass reinforced polycarbonate wall mounting case and is sealed to IP65 when the hinged transparent front cover is closed This front cover also incorporates a simple locking device to discourage unauthorised adjustments of the front panel controls The Instrument case has been coate
11. TENANCE a e ii e dees E E A 14 Gl GENERA E E E EE EAEN 14 6 2 CHANGING THE FILTER o onii e a e aaa ONER 14 7 PRINCIPLE OF OPERATION E E 14 8 WARRANTY amp REPAIR iien eia e N E AE A R tine een 15 Bel WARRANTY 75 E 15 8 2 REPAIR E TEAR R 16 8 3 TRANSDUCER 17 9 PAUL TBINDING Sethe GES Ae OA ah T 18 10 SPARES ssid EET 19 10 1 CALIBRATION is asus eke eos 19 10 2 CALIBRATION SPARES aaaeaii ren 19 10 3 gt OPERATIONAL SPARES sees 19 1371 810 03 User Manual August 2007 217 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR IMPORTANT NOTES Any adjustments or repairs to the ANALOX 1300 range of instruments should only be carried out by a competent electronic engineer familiar with Instrument technology S A E P Ltd WILL NOT ACCEPT RESPONSIBILITY FOR ANY EVENTS OCCURRING AS A RESULT OF UNAUTHORISED ADJUSTMENTS OR REPAIRS TO THE INSTRUMENTS S A E P Ltd operate a policy of continuous improvement to their products and reserve the right to change the design components and specification of their equipment without prior notice However the company will endeavour to keep their
12. clear plastic cover of the Instrument Remove the Four Corner screws in the front panel and carefully ease the front panel out of the Instrument case The Infra Red Transducer module is located in the lower right corner of the Instrument housing On the top cover of the Transducer module there is a status indicator light Under normal operating conditions this light should be flashing On and Off at about a 1 second period If the Transducer module requires service then this light will either be Permanently ON or OFF If this is the case then contact either your distributor or Scottish Anglo E P Ltd for further Advice 1371 810 03 User Manual August 2007 1217 6 1 6 2 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR MAINTENANCE GENERAL Routine maintenance should be carried out at six monthly intervals to ensure continued reliable operation The procedure detailed below should be followed and should not take more than about 20 minutes It is strongly recommended that the procedures be carried out by a technician or engineer familiar with Electronic Instrumentation Scottish Anglo Ltd offer both a full calibration service and training service for customers maintenance personnel Full details are available from Scottish Anglo E P Ltd Customer services Department who may be contacted at the Address Telephone Fax shown on the front page of this manual CHANGING THE FILTER Disable the power supply to the Instrument a
13. d with a double layer of conductive material to provide EMC Compliance ie Immunity from external Radio Frequency Emissions and containment of any internally generated RF Mains input filters are also fitted to avoid conducted interference Installation is straightforward only requiring three fixing points and all external electrical connections are made to screw terminals 1371 810 03 User Manual August 2007 517 2 1 2 2 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR SPECIFICATIONS GENERAL Ranges Available Linearity Repeatability Resolution Zero Drift Response time Display Alarm Ranges OPERATIONAL Ambient Temperature Storage Temperature Analyser Temp Warm up Time Temp Co efficient Humidity Pump Flow Rate Pressure Effect Operating Pressure Power Supplies specified at time of order 1371 810 03 User Manual August 2007 0 to 0 5 1 2 5 10 20 100 1 FS 1 FS 1 Digit on Display 2 FSD week max Less than 30 secs to T90 3 1 2 Digit LCD 1999 max reading Adjustable over full range of Measurement 5 to 50 C Wider operating Temperature Units are available on request 20 to 70 C Ambient 2 mins at 25 C Typical Zero 0 1 FS C Typical Span 0 2 FS C Typical 0 90 Non condensing 75 ml min 4 5 1hr 0 15 of Reading per millibar 0 9 to 1 1 Bar ABS 230v AC 50 60Hz b 110v AC 50 60 Hz 617
14. for about 30 Seconds after switch on Check the Alarm Set points as detailed in Section 4 of this manual FAULT LED Illuminated ZERO adjustment control incorrectly set Too far Anti clockwise Carry out Calibration procedure as detailed in Section 5 of this manual If this does not correct the fault contact Agent or SAEP Ltd O RNG LED Illuminated Contact Agent SAEP Ltd Overrange 1371 810 03 User Manual August 2007 1817 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR 10 SPARES 10 1 CALIBRATION KITS Instrument Range 0 5 FS 1 0 FS 2 0 FS 5 0 FS 10 FS 20 FS 100 FS 10 2 CALIBRATION SPARES Kit Part Number SA7 D03 0 5 SA7 D03 1P0 SA7 D03 2P0 SA7 D03 5P0 SA7 D03 10P SA7 D03 20P SA7 D03 100P Gases 20 Litre Cylinder Disposable Test Gas Pure Nitrogen SA7 120 01 0 5 in Air SA7 120 130 1 5 in Air SA7 120 131 4 0 in Air SA7 L20 132 10 in Air SA7 L20 57 50 in Air SA7 120 133 100 SA7 120 134 Regulator to suit 20 Ltr Cylinder SA7 FLOWIN 10 3 OPERATIONAL SPARES Pack of 5 Gas Filters 1000 1401 1371 810 03 User Manual August 2007 1917 1 Comment LAST Comment PAGE
15. hand two terminals are used on the Signal terminals these provide a 4 20mA DC output signal representing 0 to 100 of Instrument measuring range Optionally a 0 lvolt output can be provided instead of the 4 20mA if this is requested when ordering On AC Supply versions an AC mains supply of correct value as stated on the Internal label covering the terminals should be connected through the left most cable gland to the terminals marked L and N The Earth lead should be fixed to the Ring connector provided on the Earthing stud on the Left inside wall of the Terminal compartment On DC Supply versions a 12 DC supply should be connected to the terminals marked 12V and Remote gas sampling may be carried out by connecting up to about 30 metres of 4mmI D 6mm OD plastic tubing between the GAS bulkhead connector and the area to be monitored A Pump failure or gas flow failure Alarm circuit is incorporated and this operates a relay whose contacts are connected to a 3way screw terminal block just to the left of the terminals described in Section 3 2 1 Under normal flow conditions the NC and CM contacts are closed and the NO and CM contacts open Under flow fail or power fail conditions these contacts will change over COMMISSIONING When the 1371 Surveyor is first switched on it requires a period of about 40 Seconds for the IR Transducer to settle During this period the Reading on the Display will be clamped to read
16. nd open the front cover Remove the four corner screws from the front panel and carefully ease the front panel away from the Instrument case The panel is attached to the main circuit board by some wires but it can be temporarily parked in the uppermost slots on the left and right sides of the case Locate the plastic filter unit fitted in the Gas Inlet Pipe Carefully remove the plastic tubing from the ends of the and insert the new filter in the piping Replace the front panel ensuring that the wires to the front panel are not trapped between the panel and the case The Instrument may now have its power supply restored and after initial warm up will be ready for operation Replacement Filters are available from Scottish Anglo E P Ltd and should be ordered as Part Number 1000 1401 A full Calibration procedure as detailed in Section 5 should now be carried out NOTE If the Instrument is being used in a particularly dusty atmosphere the filter may require changing more frequently 1371 810 03 User Manual August 2007 1317 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR 7 PRINCIPLE OF OPERATION Most gases when exposed to the Infra Red region of the electromagnetic spectrum will absorb energy and produce very specific resonant molecular vibrations These characteristic absorptions vibrations can then generally be used to identify individual gases The degree of absorption depends on the number of absorbing molecules concentration
17. o be fully opened and below the unit to allow cables and pipework to be correctly fitted The Hinged front cover may be reversed if required Remove the two screws from the Terminal compartment cover situated along the lower edge of the Instrument Remove the cover taking care not to strain the connecting wires to the audible warning buzzer These wires are connected to the Motherboard using a small 2 way plug This may be removed by carefully releasing the locking latch on the Left of the plug Referring to the Figure below drill three holes in the mounting surface or fit 3 woodscrews at the hole centres Fix the Top screw in place but not fully screwed down this is required to hang the Instrument from the Keyhole position on the back of the case Hang the Instrument on the central screw and 212mm 140mm then secure it with two screws in the slotted positions in the lower corners 1371 810 03 User Manual August 2007 817 3 2 3 3 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR Figure 1 Fixing Centres CONNECTIONS Connections to remote equipment eg Flashing beacons or High powered Sounders and data recording devices are made through two cable glands to the screw terminals in the middle area of the terminal compartment The upper row of terminals provide connections to the alarm relay contacts and the lower row are signal input and output connections On the 1371 Instrument only the extreme right
18. r investigation 1371 810 03 User Manual August 2007 1717 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR 9 FAULT FINDING The list below is intended to assist in tracing elementary faults which can probably be corrected by the user or a Technician It is not an exhaustive list of all possible conditions If any difficulty is experienced contact either the agent who supplied the Instrument or Scottish Anglo E P Ltd Service Department at the address shown on the front page of this manual SYMPTOM CORRECTIVE ACTION No Display or Green Light Check Mains Supply is connected Switched On Check Instrument Fuse amp Replace if necessary No Display Response to Check that Pump is operating Listen close to Instrument for Buzzing whilst in normal operating sound feel slight vibration on Instrument Housing If obviously not mode operating contact Agent or SAEP Ltd Check any external tubing to the Instrument for blockage kinks No Display response to Check Calibration Gas Cylinder is not empty and that the gas in the Calibration Gas cylinder is Carbon Dioxide CO3 Check the flow on the flowmeter is approximately 1 Ltr Min If still no response carry out procedure detailed in Section 5 2 6 of this manual amp contact Agent SAEP Ltd Alarms not Functioning Check that the ALARM INHIBIT switch on the front panel is in the Right Hand position and the INHIBIT LED is not lit Note that the Inhibit LED will operate
19. ubing from the instrument and the flowmeter and remove the flowmeter control valve assembly from the gas cylinder The control valve is not designed to provide a total gas shut off when closed so to conserve gas supplies it should only be fitted immediately before use 1371 810 03 User Manual August 2007 1117 5 2 4 ANALOX 1371 MK 2 SURVEYOR CARBON DIOXIDE MONITOR It is important to realise that the Analyser in this Instrument responds to the partial pressure of Carbon Dioxide in the gas sample and that the calibration is strictly valid only at the temperature and pressure at which the calibration was done Small changes in readings will occur as ambient pressure changes from day to day However these changes are limited to about 0 15 of reading per millibar pressure change and for most applications would be insignificant For example assume an Instrument is monitoring 1 gas mixture at 1000mB pressure and is subjected to a 30 mB pressure increase over a period This would result in change in reading of 4 5 of the 1 reading and the Instrument indicating 1 045 If during the Calibration process the desired readings cannot be achieved then it is possible that the Infra Red Transducer module requires service To check that the Transducer module is operating correctly proceed as follows THIS OPERATION SHOULD ONLY BE CARRIED OUT BY A COMPETENT TECHNICIAN SINCE THERE ARE LETHAL VOLTAGES PRESENT INSIDE THE UNIT Open the front
20. ust excessive gas pressure or flow be applied to the instrument otherwise damage to the pump and or Transducer will be inevitable CALIBRATION PROCEDURE Zero calibration Using a Calibration Kit cylinder of Zero Gas ie Nitrogen fit the Flowmeter control valve assembly on to the Cylinder screw connector There may be a small escape of gas just before the assembly is fully tightened this is quite normal Connect the delivery tube to the small Barbed connector on the flowmeter and then to the GAS IN port on the Instrument Adjust the rotary valve on the flowmeter until the indicator ball is level with the middle graduation on the flowmeter This produces a flow of approximately 1 Litre per minute Allow the displayed reading to stabilise and if necessary adjust the ZERO trimmer to the left of the display until the Display shows 000 Span Calibration Using a Calibration Kit cylinder of Span Gas having a concentration of between 75 and 100 of Instrument measuring range fit the Flowmeter control valve as described in Section 5 2 1 Adjust the rotary valve on the flowmeter until the indicator ball is level with the middle graduation on the flowmeter This produces a flow of approximately Litre per minute Allow the displayed reading to stabilise and if necessary adjust the SPAN trimmer until the reading on the display is the same as the concentration of the Certified gas mixture Close the control valve remove the plastic t
Download Pdf Manuals
Related Search