MVI - Mercury Vapour Indicator Instrument User Manual V1.0
Contents
1. Function Detector Measuring Ranges Sensitivity Accuracy Repeatability Response Time Temperature Range Battery Type Battery Life Dimensions Weight Linearity Zero Drift Alarms Datalogger Operation Surveying atmospheres for Mercury Hg concentrations below and above the accepted exposure limit Dual beam Ultra Violet absorption module 0 1 199 9 and 1 0 1999 g m user controlled 0 1 g m and 1 0 pg m 5 micrograms or 10 of reading 5 FSD Approximately 3 seconds 10 C to 50 C 15 Volt Ni Cad rechargeable Greater than 6 hours after full charge 145 x 295 x 80 mm 120 mm with handle 6 Ib 10 oz 3 kg Higher than 5 from 0 to 500 pg m Less than 5 yg hour Audible alarm factory preset to 25 g m 0 2 volt for use with a datalogger not supplied After a short warm up the MVI gives real time indication of Mercury vapour levels through the PTFE probe Page 7 of 21 Packing List The MVI is sent to you packaged in a lightweight waterproof structural resin instrument case with foam insert Contents should be carefully removed and checked against the packing list Any discrepancies between the contents and packing list must be reported to Shawcity Limited within 10 days of receipt of shipment Shawcity cannot be held responsible for shortages not reported within that period Item Description Quantity 1 MVI instrument 2 MVI battery charger 3 Charcoal in line filter 4 PTFE probe and filter2. 4 Adjust the zero control to indicate zero 000 on the display 5 Remove the charcoal filter 6 Fit the PTFE probe and filter Page 15 of 21 The MVI is now ready for use During use it may be necessary for steps 4 to 8 to be repeated When using the instrument it is important to remember that Mercury is heavier than air and therefore measurement should be taken at approx 1 foot 30 cm from ground After use switch the instrument OFF and recharge the batteries if necessary Page 16 of 21 Interferences The MVI detector operates on the principle of UV light absorption There are substances other than Mercury which also cause light absorption and these substances are know as interference vapours Some of the interference vapours encountered are various hydrocarbons water vapour Sulphur compounds and particles such as smoke There is no measurable interference from Carbon Monoxide Carbon Dioxide or Ammonia High concentrations of water vapour will give readings of between 5 to 10 pg m3 however if the MVI is zeroed at a similar humidity this will not be seen Table of some interferences at 100 ppm concentration Compound Reading in m3 Benzene 20 Toluene 3 5 Acetone 3 0 Ethyl Alcohol 6 0 Ethyl Acetate 3 0 Page 17 of 21 User Maintenance Filter Replacement Charcoal Zero Filter The Mercury zero filter will become saturated after extensive use It is therefore necessary to check the condition of
3. GASTECH AUSTRALIA MVI Mercury Vapour Indicator Instrument User Manual V1 0 MERCURY VAPOUR INDICATOR MVI Mercury Vapour Indicator Instrument User Manual Part Number 26002 CONTACT INFORMATION GasTech Australia Pty Ltd 24 Baretta Rd Wangara Western Australia 6065 Tel 1800 999 902 Fax 1800 999 903 http Awww gastech com au Advanced Gas Sensing Technologies Contents Declaration of Conformity Contents Statements Warranty Safety Notes Quality Assurance Disposal Calibration and Repair Facility Training Shawcity Contact Details Introduction Specification Packing List Description Operating Controls Battery Charging Preparing the MVI for Use The MVI is Ready to Use Interferences User Maintenance Filter Replacement Audible Alarm Level MVI Health Check Consumable Items Calibration and Repair Page 3 of 21 Ww N 1 Ul anuuunaRBRHRHR A 10 12 13 14 15 16 17 18 19 18 19 19 20 21 Statements Warranty The warranty period on this product is 12 months from date of sale We guarantee to repair or replace faulty goods supplied by Ion Science Limited or at our option to refund the purchase price subject to a claim being made in writing to us within 12 months after sale Any goods which are in subject of a guarantee claim must be returned to us carriage paid and accompanied by the customer s advice note which should state the date of purchase of the good
4. Unit 106 Westpoint Centre 396 Scarborough Beach Road Osborne Park WA 6017 Tel 1800 999 902 Fax 1800 999 903 http www gastech com au Page 5 of 21 Introduction The Mercury Vapour Indicator MVI is primarily used to monitor environments where Mercury or any of the Mercury compounds are produced processed or stored and appications where Mercury vapours may pose a health hazard to personnel Units of measurement used for detecting Mercury vapour are micrograms cubic metre expressed as g m The MVI has two manually switched ranges of measurement 0 200 pg m with a resolution of 0 1 g m 0 2000 pg m with a resolution of 1 pg m Principle of Operation A sample of the immediate atmosphere under investigation is drawn by the pump into a glass sampling cell where a Ultra Violet light source is absorbed by the sample Photodiode detectors are used to measure the intensity of radiation passing through the sample chamber The optical system is designed specifically to detect Mercury in the Ultra Violet region of 254nM The presence of Mercury vapour will reduce the radiation energy reaching the photodiode detector in proportion to the vapour concentration This change is then converted into an electrical signal and conditioned to provide a linear reading on the front LCD as ug m An audible alarm is fitted which gives warnings when preset conditions are achieved MERCURY VAPOUR INDICATOR Page 6 of 21 Specification
5. 3 Test 4 Can the MVI be zeroed Zero the MVI in clean air do not use the charcoal filter Can the MVI be zeroed If not then a service is required If yes then continue Check for internal contamination Using a clean piece of flat card or plastic block the air flow to the luer connector This will force air to be drawn from the internal parts and any contamination will show on the display If the reading increases by a value greater that 5 ug m then the MVI internal parts are contaminated and service is required Check for case contamination Use a clean dry cotton bud and scrub the lid top where dirty Offer the bud to the luer inlet and note any reading changes A change of greater than 5 ug m indicates the case requires some cleaning Does the MVI detect Mercury Obtain a sample of mercury and offer this to the inlet Check that the MVI responds accordingly If the instrument does not detect any Mercury then the MVI wil require servicing Page 19 of 21 Consumable Items Description Part Number Zero Filter 26006 PTFE Probe and pack of 10 filters 26007 Manual 26002 230 VAC Charger UK 26003 220 VAC Charger European 26004 110 VAC Charger USA 26005 Page 20 of 21 Calibration and Repair The MVI requires annual calibration to maintain the best accuracy For further information please contact our Service Department on 1800 999 902 Page 21 of 21
6. arger Charger 2014033 201 038 201 031 Page 13 of 21 Battery Charging The MVI incorporates a Ni Cad battery with a continuous duty cycle of greater than 6 hours operation The full charge cycle for the battery is 16 hours Recharging Switch the instrument off Connect the MVI battery charger to the nstrument Use only the MVI charger supplied with the instrument Use of an alternative charger may damage the instrument and will void the warranty The green charging LED lamp located immediately below the ON OFF switch will light indicating the batteries are accepting charge If the instrument is not regularly used then once a month it should be fully discharged by running it until the LO BAT appears The instrument must then be fully recharged for 16 hours Only store the unit in a fully charged state Battery Charger Part Numbers USA Charger 201 033 European Charger 201 038 UK Charger 201 031 IMPORTANT NOTE Only use the Shawcity battery charger provided with your instrument Page 14 of 21 Preparing the MVI for Use 1 Turn the instrument ON and ensure the LO BAT indication does not appear If LO BAT does appear then charge the unit for 16 hours before proceeding to next step refer to Battery Charging Section of this manual for further information 2 Allow the instrument to warm up approximately 5 minutes The MVI is ready to use when it displays a stable reading 3 Fit the charcoal filter in line
7. assembly including 10 water trap filters 5 MVI operation manual 6 Peli case with foam inserts 1 PRR m Page 8 of 21 Description The Mercury Vapour Indicator MVI is a compact self contained and completely portable instrument which indicates the amounts of Mercury in micrograms cubic metre The indicating digital display and carrying handle are mounted on the top cover A female luer connector is provided at the end of the instrument to accommodate a dust and water trap fiter with PTFE extension probe In addition a length of flexible tubing may be connected to the filter for greater convenience when checking floor areas or gratings The internal Nickel Cadmium battery is rechargeable using a plug in battery charger The operating time when fully charged is greater than 6 hours Warm up time is approximately 10 minutes and direct readings are indicated on an easy to read LCD display The audible alarm provides warning of three pre defined conditions Condition Audible Signal 1 High Mercury vapour concentration greater than 25 g m Slow pulse 1 sec 2 Negative reading from 24 g m and lower Continuous tone 3 Low battery Fast pulse 3 sec The audible alarm is inhibited during the first 5 minutes of operation Page 9 of 21 Operating Controls The MVI indicating display and all operating controls are mounted on the front panel where they are readily accessible when the unit is held in the operating position 1 T
8. he ON OFF switch is located immediately below the display and to the left In the ON position the MVI will operate and display In the OFF position power to the MVI is disconnected The instrument MUST also be switched OFF to enable charging 2 The Zero Adjust control is located at centre of the panel between the handle and display A ten turn potentiometer is used to manually set the display to zero provided that the instrument is in a Mercury free atmosphere The MVI is designed to show both positive and negative readings and can be adjusted between 240 pg m by use of the zero control Zero drift shown on the display is normal and is caused by changes in temperature or humidity The zero control is used to cancel out any negative or positive change on the display prior to taking a reading 3 Range Switch a 2000 inthis range the instrument will measure over a range of 0 2000 yg m in steps of 1 ug m b 200 _ in this range the instrument will measure over a range of 0 200 g m in steps of 0 1 pg m Zero Adjust ON OFF Switch Range Switch OPERATIN RUCTIONS Page 10 of 21 Operating Controls 4 Indicating Display This shows the Mercury concentration in the monitored environment Range 0 2000 pg m MERCURY VAPOUR INDICATOR Page 11 of 21 Operating Controls Important Note The display will indicate LO BAT when batteries require charging Page 12 of 21 attery Chargin USA EUROPEAN UK Charger Ch
9. s in question and the nature of the fault Safety Notes Mercury amalgamates with gold silver stainless steel and copper alloys Accidental trapping of Mercury can cause serious damage to vital parts of electronic equipment and delicate instruments Mercury is also toxic if inhaled ingested or absorbed through the skin or eyes Care must always be exercised when handling Mercury The MVI employs an internal Ultra Violet light source operating in the 254nM region Ultra Violet radiation is dangerous and if for any reason the lamp is operated whilst exposed UV protective glasses must be worn High voltages are used in this instrument and the cover should only be removed by qualified technicians Ion Science Limited can accept no responsibility for the incorrect use of the instrument that cause harm or damage to persons or property It is the user s responsibility to appropriately respond to the readings given Quality Assurance GasTech Australia is an ISO 9001 2008 accredited company Disposal Please dispose of the MVI its components and any used batteries in accordance with all local and national safety and environmental requirements This includes the European WEEE Waste Electrical and Electronic Equipment Directive Ion Science Limited offers a take back service Please contact us for more information Page 4 of 21 Statements Calibration and Repair Facility Please contact us for more information GASTECH AUSTRALIA
10. the filter using the following procedure a Turn the instrument ON and ensure that the LO BAT indicator does not appear b Allow the instrument to warm up for 10 minutes Zero the instrument in fresh air c Connect the charcoal filter to the MVI The reading should not increase by more than 4 ug If the reading increases by more than 4 ug then the filter must be replaced PTFE Probe and Filter Assembly The MVI is supplied with a PTFE probe and luer filter This can become contaminated or loaded with dust in regular use Typical symptoms of contamination are a sluggish response to Mercury and an unstable zero If either of these symptoms occurs then the filter must be replaced Replacing the filter a Unlock the luer filter and discard b Replace with a new filter Page 18 of 21 User Maintenance Audible Alarm Level The Mercury alarm level is factory set at 25 ug m If a different alarm level is required please contact Shawcity for adjustment information MVI Health Check Over time the internal filter and tubing can become contaminated We therefore recommend carrying out an occasional health check to ensure that the instrument is clean and not giving slow or false readings There are 4 simple tests as detailed below which can be carried out by the user Prior to testing switch on the MVI and select the 2000 range Leave the instrument to stabilise for 10 minutes before proceeding Test 1 Test 2 Test
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