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Unitec ETL3000, Operation And Service Manual

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Technical Description 

 

 

3.3

 

Measuring principle of SENS-IT sensors 

 

The Unitec SENS-IT sensors are innovative devices for environmental gas pollutants 

monitoring, based on proprietary Thick Film Metal Oxide Semiconductor Technology (TF-

MOS) 

 

Thick film sensors are devices of the last generation, used to convert a chemical physic 

information into an electric signal. 

 

Thick film sensors technology exploits electric conduction phenomena that happen above the 

surface of nanostructured semiconducting metal 
oxides (composed by micrograins of 20

÷

200 nm 

diameter, depending on the sensor) at 

temperature between 200 °C and 400 °C.  An 

electrical response from semiconductor is 

obtained that is proportional to particular 

atmospheric  gas concentration; using a suitable 

fitting calibration curve the response signal is 

turned into gas concentration. In such conditions 

atmospheric oxide adsorption took place above 

semiconductor surface. 

 

 

Our sensors are composed by an alumina substrate (2,5x2,5 mm), an 

heating layer and a semiconducting metal oxide (sensible layer) whose 

signal is collected by two electrodes. The heating element works even 

as temperature regulator element in a feedback external circuit that 

works in order to maintain its resistance value constant. 

Sensor works at the same temperature in every atmospheric 

conditions. 

Alumina substrate can be electrically connected to a circuit device 

(TO8) by gold wires (0,6 mm Ø) using bonding technique. 

Some analogue and digital filters remove the sensors response from electrical noises. 

 

 

 

 

ORION S.r.l.

 

ETL_Operation and Service manual_ 02_17.docx

 

Pag.  17/35

 

Summary of Contents for ETL3000

Page 1: ...Italy Tel 39 049 9006 911 Fax 39 049 9006939 Web www unitec srl com Email info unitec srl com Web www orion srl it Email info orion srl it UniTec is a brand of ETL3000 ETLONE MULTI COMPONENT AIR QUALITY MONITOR Operation and Service Manual Ver 02 17 ...

Page 2: ...sequent editions Suggestions for improvement are welcomed Technical data subject to change The production transmission or use of this document or its contents is not permitted without express written authority Offenders will be liable for damages All rights including rights created by patent grant or registration of a utility model or design are reserved Copyright ORION Srl 2017 All Rights Reserve...

Page 3: ... 1 ETL TECHNICAL DATA 14 3 1 1 Optional accessories Technical data 15 OPTIONS FOR ETL UNIT 15 3 2 Applications 16 3 3 Measuring principle of SENS IT sensors 17 3 4 Technical Specifications of sensors 20 3 5 Technical Specifications of optional sensors 20 3 6 Specification of optional MET3000 Meteorological station 21 4 START UP OF ETL3000 ETLONE 22 4 1 Precautions to be followed for a correct inst...

Page 4: ...2 1 4 Lo strumento è rimasto spento per mesi 47 12 1 5 Lo strumento non si accende 47 12 1 6 Il display rimane spento 48 12 2 Sensori 48 12 2 1 Sul display le concentrazione dei gas riportano valori con molte cifre 48 12 2 2 I valori a display dei gas sono o a zero o a fondo scala 49 12 2 3 Il led della camerina SENS IT è spento 49 12 3 Polveri 49 12 3 1 PDR1500 I valori delle polveri sono sempre ...

Page 5: ...12 5 2 Non si riceve risposta dal modem 52 ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 5 2 ...

Page 6: ...o possess appropriate knowledge in the field of instrumentation and control referred to further as automation technology Knowledge of the safety information and warnings present in this Manual and their technically correct implementation are prerequisites for danger free installation and commissioning and for safety during operation and maintenance of the described product Only a qualified person ...

Page 7: ...by warning symbols pictograms The terms used in this manual and the information on the product itself have the following meaning Danger means that death severe personal injury and or substantial damage to property will occur if the appropriate safety precaution are not observed Warning means that death severe personal injury and or substantial damage to property can occur if the appropriate safety...

Page 8: ... device system are accessible which may carry dangerous voltages Therefore only suitably qualified personnel may work on this device These must be thoroughly acquainted with all sources of danger and the maintenance measures as described in this Manual 1 5 Qualified Personnel Severe personal injury and or extensive damage to property may occur following unqualified work on the device system or the...

Page 9: ...ery is complete and undamaged In particular compare the Order Nos on the rating plates if present with the ordering data Please retain the packaging material if possible so that you can reuse it if is necessary to return the device A form for this purpose can be found in Chapter 9 1 8 Standards and Regulations The harmonized European standards have been applied as far as possible to the specificat...

Page 10: ...BUS Air quality monitor for mobile installation complies with the following relevant provisions è conforme alle seguenti particolari disposizioni folgenden einschlägigen Bestimmungen entspricht correspondauxdispositionspertinentessuivantes satisface las disposiciones pertinentes sigiuents esta em conformidade com as disposisões pertinentes a saber voldoetaan de eisen van de in hetvervolggenoemdebe...

Page 11: ... Film Metal Oxide Semiconductor sensors included in the ETL can be drugged and damaged by certain substances In order to avoid any contamination of the sensors extremely care must be taken in NOT using any silicone or silicone compounds nearby the sensors and inside and outside the ETL Also other compounds could alter the measurements of the TF MOS SENS IT sensors as nitric compounds varnish solve...

Page 12: ...perating the instrument check The correct rating to be used check the power supply note on the label of ETL That a protective earth is installed The integrity of the mains cable All wiring must be in accordance with local norms and be carried out by experienced personnel 2 4 Connection of input signals The microprocessor board of the ETL3000 ETLONE can be set to receive 36 input 0 5V signals This ...

Page 13: ... dynamic monitoring 2 5 1 Fixed installation The mounting kit provided with ETL3000 ETLONE can be used both for pole or wall mounting For wall mounting use stainless steel screws The mounting kit is provided with fixing brackets suitable to be dimensioned for any pole diameter Check that ETL is mounted with its axis perpendicular to the ground in order to avoid any water infiltration Mounting kit ...

Page 14: ...ature 20 C to 60 C standard Relative Humidity 10 to 95 non condensing Air conditioning Not needed Data logger Microprocessor with Flash memory 1 data second acquired as elementary data for each sensor Calculation of the minute average Storage of hourly or if requested 15 minutes data watch dog on board 1 Mb memory RAM 1 Mb flash memory 4 x RS232 available 16 D O 15 D I Firmware can be upgraded by ...

Page 15: ...on last two parameters are optional Solar panel and battery kit Solar panels battery regulator for 24 hours autonomy This kit is designed to power an ETL with up to 5 sensors modem GSM and a meteorological station In case the ETL is ordered with the solar panel and battery kit the ETL will be powered only at 12V C The box with battery supplied with the ETL can be main powered at 220V or powered at...

Page 16: ...modem UMTS modem for VPN connection noise meter solar panel kit etc Different software solutions are also available for data download data export unit configuration geolocation real time visualization etc A mounting kit is always supplied suitable for any pole diameter A built in data logger allows data memory of hourly or if requested 15 minutes averages APPLICATIONS ONLY OUTDOOR 1 URBAN AIR QUAL...

Page 17: ...o particular atmospheric gas concentration using a suitable fitting calibration curve the response signal is turned into gas concentration In such conditions atmospheric oxide adsorption took place above semiconductor surface Our sensors are composed by an alumina substrate 2 5x2 5 mm an heating layer and a semiconducting metal oxide sensible layer whose signal is collected by two electrodes The h...

Page 18: ...g the granes In presence of reducing gases the density on the surface of the negative charged oxygen decreases in that way the hight of the barrier in contact with the granes gets lower as evidenced in the Fig 1 3 The reduced barrier decreases the resistance of the sensor always for a semiconductor type n which at a microscopic level is detected and measured by specific circuital elements On the o...

Page 19: ...ITICAL EXPRESSION OF THE SENSOR MEASUREMENT The reaction between the resistance of the sensor and the concentration of the reducing gas can be expressed by the following equation R A C α R electrical resistance of the sensor A α constants C gas concentration In terms of conduttance the relation with the gas concentration is expressed by a power law Gg Ga α C β Gg conductance in a gas Ga conductanc...

Page 20: ... ppm SO2 5 10 000 ppb 20 ppb 1 ppb H2S 2 3 000 ppb 15 ppb 1 ppb VOC 0 6 25 ppm 0 1 ppm 0 1 ppm SENS IT IR Infrared Technology CO2 10 5 000 ppm 50 ppm 1 ppm Operating conditions Temperature 20 60 C Relative Humidity 5 95 non condensating Zero Span drift 2 5 6 months 2 5 3 months for O3 3 5 Technical Specifications of optional sensors Parameter Measuring range Resolution Linearity Accuracy Temperatu...

Page 21: ...Technical Description 3 6 Specification of optional MET3000 Meteorological station ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 21 2 ...

Page 22: ...play shows the correct time and that the clock is correctly updated 5 Check that the measurements of Air temperature and relative humidity are coherent with environmental conditions It should not be displayed values as 50 0 and 0 0 6 Check that the values on display are coherent with the datasheet i e not values with a lot of figures NOTE We recommend to consider the following precautions at chapt...

Page 23: ...fter receipt so the sensors can reach the operating temperature sensors need a stabilization period of before giving correct values Data are quite stable after 24 48 hours of working the complete stability is reached after 3 weeks Take care to install the ETL in a proper place where there aren t substances that can emit interferences especially in summer we suggest to install ETL at 2 5 m height D...

Page 24: ...ibrated in a controlled environment against a certified analyzer whose traceability is maintained with other international standard organizations and governmental bodies Each SENS IT thick film sensor undergoes a four point calibration procedure and a separate verification to confirm performance Each SENS IT thick film sensor is supplied with a calibration certificate As an instrument manufacturer...

Page 25: ...rmed in two different ways 1 Preliminary calibration 2 Total Calibration The preliminary calibration can be performed only to verify the noise meter functionality It is necessary to open the jumper J1 and give a reference voltage on Pin 2 of the same jumper The reference voltage should be 100 mV that correspond to 100 dB in the 60 120 scale You can measure the input voltage on TP3 When the 100 mA ...

Page 26: ...33 91 0 199 5 138 00 3 833 45 7 1 084 2 10 0 058 62 0 7 079 51 00 1 417 92 0 223 9 141 00 3 917 45 8 1 096 2 40 0 067 63 0 7 943 54 00 1 500 93 0 251 2 144 00 4 000 45 9 1 109 2 70 0 075 64 0 8 913 57 00 1 583 94 0 281 8 147 00 4 083 46 0 1 122 3 00 0 083 65 0 10 000 60 00 1 667 95 0 316 2 150 00 4 167 46 5 1 189 4 50 0 125 66 0 11 220 63 00 1 750 96 0 354 8 153 00 4 250 47 0 1 259 6 00 0 167 67 0...

Page 27: ...pacity is only of 2 5 days Once the memory buffer is full the new data is overwritten on the oldest data The ETLBUS application is provided with a data logger which stores an instantaneous data every 10 including the GPS data if supplied for a total of 14 hours of buffer Once the memory buffer is full the new data is overwritten on the oldest data All concentration values for gaseous pollutants ar...

Page 28: ...minal follow these steps Go on START of Windows ALL PROGRAMMS ACCESSORIES COMUNICATION HYPERTERMINAL Give a name at the session i e ETL Go on Connect and select the COM where is connected RS232 CECK THAT THE PORT COM IS INDEED THE CORRECT SELECION PORT IN USE IN THE CONTROL PANEL Press OK Now you have a new window click on CONFIGURE Please set up 9600 baud 8 bit chr 1 bit stop no parity half duple...

Page 29: ...or 2 Command to set date and time 3 Command for data transmission of averages stored in SRAM 4 Cancel the memory buffer 5 System Restart reconfiguration without cancelling the buffer and system pointers 6 Downolad meteo data 6 1 1 Command to memorize the calibration curves The set of command is L Numch xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx xxxxxxxxxx MSB crc LSB crc Cr where L com...

Page 30: ...ording to the type of sensors installed Examples of Calibration curves CO L01 0 279 0 000003873 2 0 for SENS3000 L01 0 0 0 01718 0 0 for SEN IT O3 L02 31 6 5330 9 0 598 for SENS3000 L02 0 0 0 05012 0 0 for SEN IT NO2 L03 1397 742 164 415 for SENS3000 L03 0 0 0 0523 0 0 for SEN IT C6H6 L04 2 0003 0 0062238 for SENS3000 L04 0 0 0 00616 0 0 for SEN IT Temp for MET BASIC L05 40 0 60 0 Ö RH for MET BAS...

Page 31: ...ta acquired from the beginning if the hour to the moment the command was sent So once this command is sent one hour average is lost 6 1 3 Command for average data transmission The set of command are T2 Cr only for ETL with hourly average 15T2 Cr only for ETL with 15 minutes average When the command is sent the complete content of the buffer is sent through the RS232 from the ETL3000 If the buffer ...

Page 32: ...me WIND SPEED m s WIND DIRECTION DEG TEMP OUT C U R BAROMETER mBar RAINFALL COUNT SOLAR RAD W m2 AVERAGE U V Index Example 23 11 16 15 50 1 3 250 0 35 6 20 0 971 7 0 0 32767 0 6553 5 6 2 Remote Data Transmission ETL3000 ETLONE can be equipped with a GSM UMTS modem for remote data transmission The modem is installed inside the ETL case and connected to the RS232 port The GSM MODEM or UMTS router if...

Page 33: ...nage remotely one ETL3000 or a network of ETL3000 It is possible to download data manually or automatically at present time calling the ETL3000 units For the correct functioning of Com3000 it is necessary to set some data regarding each remote ETL3000 station with which the Master station will connect to For each remote ETL3000 station there must be in the Master Computer an ETL3000 station which ...

Page 34: ... importing ETL config file you can view all channel properties for each station Each channel represents a compound of the configuration and for each one you can set a different unit changing the right conversion factor ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 34 2 ...

Page 35: ... in graphs and tables using other menu of COM3000 In order to generate a report and or graph our software requires Excel installed on the pc N B Excel software will be not provided with COM3000 and it will be present before installing COM3000 Below there is shown an example of report ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 35 2 ...

Page 36: ...damaged equipment and container You may want to keep a copy of these documents for your records also Refer to the instrument name serial number sales order number and your purchase order number on all claims Upon receipt of a claim we will advise you of the disposition of your equipment for repair or replacement 8 2 Shipping discrepancies Check all containers against the packing list immediately o...

Page 37: ...ARTS REPLACEMENT SENSORS The replacement THICK FILM sensor comes without its plug in electronic board After replacement new currents values have to be set according to specific instructions and data included with the sensor SERIAL NUMBER OF ETL IS NEEDED WHEN PLACING THE PURCHASE ORDER 001 061 0030 CO SENS R 001 061 0031 O3 SENS R 001 061 0032 NO2 SENS R 001 061 0033 METHANE SENS R 001 061 0034 BE...

Page 38: ...FAQ 002 005 0024 Spare parts kit for PM10 LS 002 005 0025 Protection dust filter for PM10 LS ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 38 2 ...

Page 39: ...01 0 6 60 02 88 3 60 03 69 5 60 04 3 7 60 05 5 0 60 06 6 0 60 07 45 0 60 08 0 0 60 09 203 0 60 10 10 0 60 New format version 11 channels 20 05 09 16 00 01 0 6 60 02 88 3 60 03 69 5 60 04 3 7 60 05 5 0 1 0 60 06 6 0 07 45 0 60 08 0 0 60 09 203 0 60 10 10 0 60 11 11 0 60 Classic format version 13 channels 20 05 09 16 00 01 0 6 378 0 60 02 88 3 570 0 60 03 69 5 3225 0 60 04 3 7 630 0 60 05 12 0 1 0 6...

Page 40: ...mposed in this way 20 05 09 16 00 Date Format DD MM YY hh mm 01 channel number 0 6 concentration of pollutant 378 0 tension mV that generates each concentration 60 number of samples ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 40 2 ...

Page 41: ... that the Unitec TF MOS sensors performances can be tested with gas cylinders Nevertheless it has to be done in laboratory under strictly controlled conditions To correctly test the sensors and verify their performances in laboratory it s necessary to have the right equipment and experience to keep under control all the multiple variables involved in the redox reactions on the TF MOS sensing eleme...

Page 42: ...ng temperature gas diffusion dynamic on sensor surface pressure creating an artificial environment around the sensor and interfering on the red ox reaction mechanisms 3 all the SENS IT sensors are set up with outdoor calibration to give good results in outdoor conditions This set up is completely different to the laboratory calibration set up It means that also the sensor response is different The...

Page 43: ... Controllo del Sensore x4 Circuito di misura del segnale Circuito di controllo della temperatura Input Analogici Conversione A D Circuito di controllo singolo sensore Misura Diagnostica Eprom MicroP RAM Mem Flash RS232 Modulo GSM Display Grafico Miniboard di Controllo del Sensore x4 Circuito di misura del segnale Circuito di controllo della temperatura Input Analogici Conversione A D Circuito di c...

Page 44: ...eparated collection of this equipment is organized and managed by the manufacturer The user who needs to have this equipment separately collected should get in contact with the manufacturer and follow the arranged procedures system he will show him to allow the separate collection of the end of life equipment The adequate separated collection for the following recycling a and waste of such equipme...

Page 45: ...ers Check that the 20 poles flat connector is correctly fit in the back of the display and in the micro board Try to switch off and on the ETL If the problem persists check that the two boards are well connected to the socket ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 45 2 ...

Page 46: ...roblem persists check that the gree led of the micro board is switched on In case it is switched off the software of the ETL is blocked and it is necessary to refresh the firmware In this case please contact ORION ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 46 2 ...

Page 47: ... 1 4 Lo strumento è rimasto spento per mesi Se si lascia l ETL spento per mesi la batteria tampone della scheda micro potrebbe scaricarsi In tal caso alla riaccensione dell ETL potrebbe presentarsi una errata visualizzazione del data e del clock e o potrebbero essere visualizzati valori dei gas con tante cifre numeriche Per ripristinare la funzionalità dell ETL è necessario impostare correttamente...

Page 48: ...le schede elettroniche sul socket vedi punto 12 1 1 12 1 6 Il display rimane spento Verificare se l ETL è alimentato seguendo quanto descritto nel punto 12 1 1 e successivamente nel punto 12 1 5 12 2 Sensori 12 2 1 Sul display le concentrazione dei gas riportano valori con molte cifre E necessario caricare nuovamente le curve di calibrazione dei sensori seguendo quanto descritto nella sezione 6 1 ...

Page 49: ...ed in campionamento Se spento accenderlo premendo il tasto di on sul pannello frontale del PDR Una volta comparsa la scritta OPERATE premere il tasto ENTER 2 volte per far partire il campionamento Se tutto procede correttamente dovrebbe partire la pompa e comparire la concentrazione di polvere misurata Se il valore sul display dell ETL continua ad essere zero verificare che il cavo del segnale ana...

Page 50: ... a display la scritta Zero Instrument Complete BKG ok la procedura di zero è terminata 10 Cliccare su OK E si torna alla scritta Operate a questo punto togliere il filtro di zero e riposizionare il parapioggia e far riprendere il normale funzionamento dello strumento con la consueta modalità Se invece è comparso un messaggio di errore allora il PDR1500 deve essere spedito nei nostri laboratori per...

Page 51: ...mento del cavo seriale di comunicazione della MET3000 Se il problema persiste da molte ore riavviare l ETL per sincronizzare il clock dell ETL con il clock della scheda micro della centralina meteo Nel caso in cui il problema non si è risolto allora sarà necessario eseguire una sincronizzazione del clock della DAVIS con il software WeatherLink Contattare la casa madre ORION S r l ETL_Operation and...

Page 52: ... con COM3000 si ottiene il messaggio Buffer Empty Verificare che il modem dell ETL stia funzionando sezione 12 5 2 Verificare che il sistema di trasmissione dell COM3000 stia funzionando correttamente E molto probabile che non è stata eseguita alcuna chiamata verso la centralina per lo scarico dei dati 12 5 2 Non si riceve risposta dal modem Controllare se è stato eliminato il pin dalla scheda sim...

Page 53: ...r modem GSM la sim deve essere Machine To Machine M2M dati su rete GSM no sim usate per navigare in internet 2 Per router UMTS la sim deve essere Machine To Machine M2M dati con IP pubblico statico o dinamico in modo il router possa essere interrogato dall esterno attraverso la rete internet ORION S r l ETL_Operation and Service manual_ 02_17 docx Pag 53 2 ...

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