VOC Sensor B/ESO150-DSO150 B/ESO152
Contents
1. User s Manual respect to isobutylene The following table indicates the sensor response factors regarding the isobutylene gas 1 2 3 trimethylbenzene 1 2 4 trimethylbenzene 1 2 dibromoethane 1 2 dichlorobenzene 1 2 dichloroethane 11 7 lamp 1 3 5 trimethylbenzene 1 4 dioxane 1 butanol l methoxy 2 propanol l propanol 2 butoxyethanol 2 methoxyethanol 2 pentanone 2 picoline 3 picoline 4 hydroxy 4 methyl 2 pentanone acetaldehyde acetic acid acetone acetophenone acrolein allyl alcohol ammonia amylacetate arsine benzene bromoform bromomethane butadiene butyl acetate carbon disulfide chlorobenzene cumene isopropylbenzene cyclohexane cyclohexanone decane diethylamine dimethox ymethane dimethyl disulfide diesel fuel 1 diesel fuel 2 epichlorhydrin ethanol ethyl acetate ethyl acetoacetate ethyl acrylate ethyl ether diethyl ether ethyl mercaptan ethylbenzene ethylene ethylene glycol ethylene oxide 0 49 0 43 11 7 0 5 0 5 0 34 1 4 3 4 1 4 5 7 1 3 2 0 78 0 57 0 9 0 55 10 8 11 1 2 0 59 3 9 23 9 4 a 2 6 0 53 Zo 1 8 0 69 2 4 1 2 0 4 0 54 1 5 0 82 1 6 l 11 3 0 3 0 9 0 75 7 6 10 4 2 0 9 2 3 1 2 0 6 0 51 10 1 15 7 19 5 13 gasoline heptane hydrazine hydrogen sulfide isoamyl acetate isobutanol isobutyl acetate isobutylene isooctane isopentane isophorone isoprene 2 methyl 1 3 butadiene isopropanol isopropyl acetate iso2. 6 eV which belong to the group of aromatic hydrocarbons benzene ethylbenzene toluene etc aliphatic hydrocarbons butane octane etc alcohols ethanol propanol butyl alcohol and its derivatives etc Many are the sources of such compounds cleaning products such as floor and furniture waxes spray and liquid abrasive paste dishwashing liquid solid and spray deodorants products to clean the bathroom glass and ovens paints and associated products such as oil urethane and acrylic paints spirit paints for shellac wood mordant and dyes thinners for brushes paint removers pesticides insecticides and disinfectants glues and adhesives products for personal care and cosmetics products for cars products for photographic development do it yourself products furniture and fabrics building material office products such as printers photocopiers highlighters and similar stationery heating and conditioning systems reservoirs kitchens fireplaces tobacco human animal e vegetable organic substances industrial and vehicle emissions The sensor measurements may be influenced by relative humidity and dust which can be reduced by using a filter and a good geometry of the sensor LSI LASTEM B ESO150 2 DS0150 2 User s Manual 2 Technical features FI B ESO150 DSO150 B ESO152 DSO152 Measuring range 0 20 ppm VOC 0 2000 ppm VOC isobutylene isobutylene Sensitive element PD Threshold 0 01 ppm Isobutylene 0 1 ppm Isob
3. ID cell In order to remove the cell take down the lower base of the probe s shell by unscrewing the 2 lower screws then unscrew the 3 screws that hold the electronic board to the shell and remove it 3 screws electtronic card electronic card 2 screws base LSI LASTEM B ESO150 2 DS0150 2 User s Manual Disassembly Remove the Filter Cap by applying slight upward pressure with the tip of a screwdriver or X Acto blade just below the hole in the cap and between the cap and housing it will pop off With fine tipped tweezers remove both the Filter Media and set aside 4 Using the X Acto blade remove the spacer and set aside 10 With fine tipped tweezers carefully remove the Cell Assembly by prying under the Cell s edge where With fine tipped tweezers grasp the lamp by placing the tips in the housing notch and gently pull it out Be careful not to scratch the lamp lens or chip edges Cleaning the Lamp Grab the lamp by the cylindrical glass body and clean the window by rubbing it against the Polishing Pad Use a circular motion and try to keep the window surface flat relative to the pad Five seconds of rubbing will be enough in most cases Another indication of cleaning completeness is that you have used about 1 6 of the pads surface during the procedure LSI LASTEM B ESO150 2 DS0150 2 User s Manual Reassembly Install the lamp into the sensor making sure that the la
4. LSI LASTEM S r l Via Ex S P 161 Dosso n 9 20090 Settala Premenugo MI Italia Tel 39 02 95 41 41 WEB http www si lastem it Fax 39 02 95 77 05 94 CF P Iva VAT IT 04407090150 e mail info lsi lastem it REA 1009921 Reg Imprese 04407090150 iTA KT ENKA FRE VOC Sensor B ESO150 DSO150 B ESO0152 DSO152 User s Manual Updated on 01 02 2011 Cod INSTUM 00072 en LSI LASTEM B ESO150 2 DS0150 2 User s Manual Index IR un ae EE ee eee 3 2 Technical TOA EE 4 Ne elie ce UN Cone EES 4 PEN heden ann nld beha a a a EA 5 4 2 Models ESO150 and ESRO1a7 hekske ans 7 4 3 Models DSO150 and DSO1a2 eenen annen enen en senen ensen nnenenenn 7 Oan TTT 8 Get E EE EE 8 LSI LASTEM B ESO150 2 DS0150 2 User s Manual 1 Product presentation The VOC volatile organic compound sensor measures the volatile organic compounds in the air The sensor works according to the PID photo ionization detector principle a UV lamp delivers 10 6 eV nominal energy photons and they can 1onize some types of gas molecules These molecules go through 2 excitation flaps equipped with a potential difference of about 70 V the latter generate a field and displaces the ions towards the respective flaps The weak produced current 1s amplified and is proportional to the gas concentration This sensor is operative for about year The sensor is able to measure VOC gases with an ionization energy less than 10
5. e compatible with datalogger with connector inputs ELR510 and ELO009 models 4 3 Models DS0150 and DSO152 Connect the terminals for power and signal as described in the diagram in paragraph 3 LSI LASTEM B ESO150 2 DS0150 2 User s Manual 5 Calibration Calibrate the probe daily If the environment is not particularly polluted calibration may take place weekly or monthly Zero calibration may take place by using a cylinder containing nitrogen or fresh air rotating the zero trimmer End scale calibration may take place by using a cylinder containing isobutylene with air or nitrogen bottom with a known concentration for example 15 ppm isobutylene per BSO ESO DSO150 and 1500 ppm per BSO ESO DSO152 rotating the FS trimmer LSI LASTEM supplies the probe with an aluminum union adapter for the cylinder with silicon rubber pipe These materials don t absorb gas so they do not influence the measurement 6 Maintenance Using the probe its internal lamp degrades slowly The operation of the lamp may be impaired due to e Internal wear after about 6000 working hours e Window contamination due to the pollution of the volatile particles To clean the lamp window follow the instructions in paragraph 6 1 The lamp can last longer by frequently calibrating the sensor LSI LASTEM B ESO150 2 DS0150 2 User s Manual 6 1 Cleaning the lamp To clean the lamp open the sensor shell and remove the electronic board that holds the P
6. mps metalized pads are aligned with the corresponding excitation springs inside the lamp cavity Place the spacer around the cell assembly Place the Filter Media over the Cell Assembly centered on top of the sensor Make sure the filters are installed in the correct order Filter Media 2 first then Filter Media 1 on top with With the end of the clean tweezers or the clean blade the shiny side up of a screwdriver press down firmly Be careful not to scratch the surface of the lamp _ Alight the Cap Key with the notch on the housing Starting at the side opposite the notch press down until the Filter Cap snaps on to the housing If the Cap Key is incorrectly aligned there will be a noticeable bulge on the side of the cap Using fine tipped tweezers install the cell assembly Align the pins with the corresponding sockets on the sensor and push down on the end with the pins Make sure the cell assembly is flush with the lamp window 11 Appendix 1 measure with reference gas The picture below shows the response of a BSO150 sensor when applied to a 16 ppm isobutylene gas flow VOC 2 measueres of a BSO150 sensor with a 16 ppm isobutylene concentration cylinder 16 12 06 cylinder is closed 16 0 ppm isobutylene cylinder measure 2 measure 0 100 200 300 400 500 600 700 seconds 7 Appendix 2 response factors LSI LASTEM BS0150 2 DS0150 2
7. propyl ether isopropylamine Jet A fuel JP 5 fuel JP 8 fuel mesityl oxide methanol 11 7 lamp methyl acetate methyl acetoacetate methyl acrylate methyl benzoate methyl ethyl ketone methyl isobutyl ketone methyl mercaptan methyl methacrylate methyl tert butyl ether methylamine methylbenzil alcohol methylene chloride 11 7 lamp m xylene naphtalene n n dimethylacetamide n n dimethylformamide n hexane nitric oxide n nonane nitrogen dioxide 11 7 lamp n pentane n propyl acetate octane o xylene phenol phosphine pinene alpha pinene beta propionaldehyde propanal propylene propylene oxide E 2 2 6 3 2 1 8 4 7 2 6 1 3 0 74 5 6 2 6 0 8 0 4 0 48 0 48 0 47 29 1 1 3 4 0 93 0 9 1 1 1 5 0 86 1 2 0 85 0 53 0 37 0 73 0 8 4 5 12 1 6 10 9 1 3 1 22 0 54 2 8 0 4 0 4 14 8 1 3 6 5 p xylene pyridine quinoline styrene tert butyl alcohol tert butyl mercaptan tert butylamine tetrachloroethylene tetrahydrofuran thiophene toluene trans 1 2 Dichloroethene trichloroethylene trimethylamine turpentine crude sulfite turpentine pure gum vinyl acetate vinyl bromide vinyl chloride vinylcyclohexane VCH vinylidene chloride 1 1 DCE 0 5 0 79 0 72 0 4 3 4 0 55 0 714 0 56 1 6 0 47 035 0 45 0 5 0 83 0 45 1 3 0 4 1 8 0 54 0 8 LSI LASTEM BS0150 2 DS0150 2 User s Manual 14
8. uenching 100 ppm ws RH D ppm vs RH Signal ppm Signal ih Humidity Response Humidity Quenching Effect 2 3 Warm up If the sensor 1s used daily the measurement is stable after a 20 minute time from power up after prolonged storage it 1s recommended to operate the sensor for a longer period of time before operating it see picture below Time min LSI LASTEM B ESO150 2 DS0150 2 User s Manual 3 Connection diagram UGUAAA SERIE ESOXAX SERIE BSOXAX SERIE LSI LASTEM B ESO150 2 DS0150 2 User s Manual 4 Using the sensor 4 1 Models BS0150 and BS0152 Connect the sensor to the Babuc instrument then start the survey on the instrument it will automatically recognize the VOC gas concentration measures The table below shows a list of operative codes and sub codes used by Babuc for the acquisition of the BSO150 probe Op Code _ Sub Op Code Conc gasVOC Conc gasVOC The sensor is compatible with LSI LASTEM acquisition instruments of the Babuc A M line running version 5 11 or higher 4 2 Models ES0150 and ES0152 Connect the probe to R Log or M Log instrument switch on and configure the datalogger or make the automatic recognition of connected probes after this operation the survey will start automatically For more information on configuration of dataloggers see their manuals on website www lsi lastem it or available on LSI LASTEM product s DVD MW6501 Sensors ar
9. utylene in the range from 20 to 40 C in the short run lt 10 of the signal in the range from 10 to 90 RH influence due to the presence of water vapor molecules 1 hour for rarely uses for diffusion with a 150 cc min flow limitation B ESO150 60 300 mV B ESO152 60 300 mV DSO150 4 20 mA DSO152 4 20 mA B ESO150 minidin connector B ESO152 minidin connector DSO150 wired length 10 m DSO152 wired length 10 m Dimensions 54mm h 42 5mm 2 1 femperature drift These pictures show the sensor measurement drift depending of the ambient temperature Sensor Sensitivity vs Temperature Sensor Sensitivity vs Temperature 100ppm isobutylene 1Opom lsobutylene Deviation E a CH Temperature C Temperature C LSI LASTEM B ESO150 2 DS0150 2 User s Manual 2 2 Relative humidity influence This probe is influenced of two phenomenon related to relative humidity in pure air and with VOC gas 1 In the case of Humidity Response to Moisture pure Hydrocarbon Free HCF air is applied to the sensor with some humidity present in the sample The maximum expected shift does not exceed 1 0 ppm Isobutylene For improving the accuracy of low level measurements it is recommended to zero the sensor at the same level of relative humidity RH as expected in the sample 2 With a fixed VOC concentration measured value can be less from 8 to 15 when relative humidity is 90 humidity q
Download Pdf Manuals
Related Search