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1. Calibration of temperature and humidity sensor X p UE ES Remarks date Supervised Dy stes uito eee ue t LSI Thermohygrometers User s manual 11 CE Conformity declaration DICHIARAZIONE DI CONFORMITA CE Declaration of Conformity produttore LSI LASTEM SPA Applicant Con la presente si dichiara che tutti i prodotti della seguente serie We hereby declare that ail the products of the following series Termolgrometro per applicazioni ambientali Termolgrometer for environmental applications DMAS67 DMAS69 DMAS75 DMA585 DME775 DME785 a cui questa dichiarazione si riferisce conforme ai requisiti essenziali dei seguenti standard e documenti normativi to which this declaration relates is in conformity with the relevant provisions of the following standard and other normative documents EN 61326 2006 Industrial Location che rispettano le direttive following the provisions of the Directive 89 336 EEC 2004 108 CE Settala 5 Aprile 2007 Dr Giulio Certo Direttore Generale e Legale Rappresentante 15 LSI Thermohygrometers User s manual 12 Appendix APPENDIX A Connection od DMA 572 to Babuc ABC SCHEMA DI CONNESSIONE PER BABUC ABC BABUC ABC CONNECTION m R1 RESIST 5 6 KOHM 1 8W 17 ggg R2 RESIST 2 4 KOHM 1784 17 8888 INGRESSI ANALOGICI ANALOGUE INPUTS iV ZR H DMAS 12 0 GREEN Pt100 2 NE BROWN 12V M INGR2. general make them particularly representative of the general conditions in which the measurement is to be performed It is important that there are no structures in the nearby areas which might radiate heat such as cement floors asphalt walls etc The thermohygrometer should be installed at 1 5 2 mt from the ground see WMO n 8 part 2 4 1 Mounting Place the supporting collar DYAOSI in position on the pole at the desired height normally 1 5 2 m and tighten the screws socket head screw no 6 DMAS72 with DYA230 Fasten DYA230 to the collar DYAOSI Insert DMAS72 in the shield from the bottom end tighten the cable glands to fix the sensor in the shield Connect DMAS72 to LSI data logger occording to Appendix A and B LSI Thermohygrometers User s manual DMAS72 with DYA231 DYA232 Fasten DYA231 DYA232 to the collar DYAOSI Insert in the shield the DMAS72 from the bottom end tighten the cable glands to fix the sensor in the shield Connect DMA572 to LSI data logger Connect the forced ventilation shield to suitable power supply LSI Thermohygrometers User s manual DMAS75 DMA585 DMAS67 DMA569 Attach the instrument to the collar DYA051 and connect the instrument with the cable DWAS to proper power supply and signal recording Secure the cable along the length of the pole with clips Tag the cable so that the sensor to which it is connected can be subsequently identified the DWAS connect cabl
3. 0 4 20mA 0 1 5V 0 60 300mV default 4 20mA DMAS67 has 12V power supply DMA569 has 24V power supply LSI Thermohygrometers User s manual 3 Technical specifications A E Relative humidit Range 30 70 C 50 50 C 0 100 C 40 100 C 0 100 Sensitive element Pt 100 1 3 DIN B Sensitive element replacement ML3021 Plug in connector Sensitive element accuracy 10 2 C 0 C 1 596 5 95 23 C Repeatability Hysteresis x 2 lt 5 gt 95 23 C Electronic Accuracy 0 035 C 0 25 Resolution 0 035 C 0 25 sensitive element Response time 10s Sensitive element Long term stabilit Temperature dependence 6 45 C 11 90 RH ae Operating temperature 95 C Output DMA567 DMA569 DMA567 DMA569 DMA575 DMAS85 analog di ti DMAS72 Pt100 Q DMA572 1 041 V Power Supply DMA567 DMA572 DMA575 10 14 Vdc DMA569 DMA585 24 Vac Power Consumption DMA567 DMA569 DMA575 DMA585 fan not inclueded max 1 5 W DMA572 2mA CE Compliance Electric Protection Housing Weight Connection Cable DMA572 5m attached DMA575 DMA585 Mod DWAS 6 wire shield LSI Thermohygrometers User s manual 4 Assembly instructions Select a site with conditions representative of the environment being examined Hygrothermometers Thermometers must be assembled in places where the morphological conditions of the earth the urban structures and the environmental conditions in
4. 3021 11 LSI Thermohygrometers User s manual 8 Calibration The calibration procedure is requested only for instruments without plug in sensitive element This procedure describes the calibration of the humidity element only The calibration procedure is carried out using the DSP210 calibration set plus MM1201 MM1202 phials This calibration is made at two measurement values 20 RH and 80 RH The resulted calibration values are stored in the sensor EEPROM This procedure is not follower type Calibration procedure 1 2 3 4 Open the elements box Check that SW1 and SW2 terminals are in OFF position Connect the serial cable to X2 connector and the RS232 PC port Connect a multimeter in 20 mA reading mode to the DWAS cable in the humidity wires output Turn the sensor power supply on On the PC program AdjTTU 3 6 T 8 9 Run the AdjTTU PC program Select the following Communication options Parametri Bitrate 9600 bit ID 2 Number PC port used select the one where the serial cable is connected on PC Select Humidity Follow the suggested procedure FASEI and later FASE2 Note wait for the require stability time not less than 20 30 minutes Read on the multimeter the current value and type this value on the Amperometro box Select ACCETTA to confirm and CHIUDI to close the calibration procedure Select AVVIA to restore the sensor in the measurement mode an
5. E SENSOR IL SENSORE UNA VOLTA INSERITO SI PRESENTERA FERFETTAMENTE CONCENTRICO RISPETTO AL CIRCUITO REINSERIRE NELLO STELO IL SENSORE COM IL CIRCUITO E RIAVVITAFE IL FILTRO FOROSO SULLO STELO THE SENSOR ONCE INSERTED WILL BE PERFECTLY CONCENTRIC ACCORDING TO THE CIRCUIT INSERT THE SENSOR HITH THE CIRCUIT INTO THE STEH AGAIN AMD SCREW THE POROUS FILTER ONTO THE STEM 21 LSI Thermohygrometers User s manual Appendix G Electric output switch USCITE ELETTRICHE swa ELECTRIC OUTPUTS OUT 2 PUNTO DI RUGIADA I DEW POINT OFF n om ho 4 20mA 0 20mA USCITA IGROM HYGROM OUTPUT Z OUT Rel O FF 1 5V CAMPO DI TEMP TEMP RANGE SW2 SW2 3 3 30 70 C in TE OFF OFF 3 3 0 100 C in if OFF OFF gt n e gt E o c ur o o 0 2 1v 60 300mV 22
6. ESSI ANALOGICI ANALOGUE INPUTS 5 BLU BLUE COMUNE COMMON T MARR SCHERMO 2 GIALLO YELLOW Pt100_1 4 BIANCO WHITE Pt100_2 1 NERO BLACK Pt100 1 3 VERD ROSSO RED LE D gt 16 LSI Thermohygrometers User s manual APPENDIX B Connection od DMA 572 1 to E Log SCHEMA DI CONNESSIONE PER E Log E Log CONNECTION 1V ZR H MARRONE BROWN 12V BLU BLUE COMUNE COMMON SCHERMO SHIELD GIALLO YELLOM Pt100 1 VERDE GREEN Pt100 2 BIANCO WHITE Pt100 2 O a Lali De M je DI t O og 17 LSI Thermohygrometers User s manual APPENDIX C Connection od DMA 567 to Babuc ABC and E Log SCHEMA DI CONNESSIONE PER E Log E Log CONNECTION Ty esa eet aie ninni tle al SCHEMA DI CONNESSIONE PER BABUC ABC za BABUC ABC CONNECTION I bl Il e a gt gt 0 gt Il ui gt IZI o Ea ES SI ZI aea Di Tuo gu P si si 3 ala 5 83 Ops AZ ZO aaa a en xz INGRESSI ANALOGICI HA a es atl cy ANALOGUE INPUTS DMA56 1 USCITA OUTPUT DEFAULT 4 20mA 2 NERO BLACK 60 300m TEMP 3 BLU BLUE COMUNE COMMON 4 ROSSQ REDU 60 200mVv R H 1 MARRONE BROWN 124 SCHERMO SHIELD SIG 60 300m SIG O 1 18 LSI Thermohygrometers User s manual APPENDIX D Connection of DMA 575 DMA585 SCHEMA DI CONNESSIONE PER E Log E Log CONNECTION size SCHEMA DI CONNESSIONE PER BABUC ABC 48 BABUC ABC CONNECTIO
7. HL N N NN LSI Laboratori di Strumentazione Industriale S p A Via Ex S P 161 Dosso n 9 Settala Premenugo MI Italia LAS rT Erm Tel 39 02 95 41 41 WEB http www lsi lastem it Com Z gU Fax 39 02 95 77 05 94 CF P Iva VAT T 00847150158 EN ISO 9001 2000 ips sa pel e mail info lsi lastem it REA 834042 Reg Imprese 00847150158 Thermo hygrometers User s manual Version 21 06 2007 Cod INSTUM_00174 en LSI Thermohygrometers User s manual Index 1 Product oou A DM d Ld D M LIE 3 A NCMO erepttoJPJPJPOP o 4 AI A a 4 RA A A II II 4 E IR RR O aa OE I e E E 3 Lo TE ndr bl ERE 6 5 1 Humidity measurement m very hot westlier i iciatis ld cuantas 9 O MT Pet 10 ARL aa 10 UR ET e aeo ee REDE ENDO n AWA 10 AL ro _emebe gt ppetspspceee 11 1 5 TES he sensitive E iic e eiie cb b A A A A A AAA 11 A A LM IM CL IM ME CM DE MM M EL M hc 12 LSI Thermohygrometers User s manual 1 Product versions Cod ee ee Power supply 24 V 12 V 10 14 V 10 14 V Output Analog TA Pt100 0 300mV Description Temperature and relative Lo NEN sensor suitable for LSI LASTEM data acquisition systems Cable L 5 m attached Coupled to DMAS572 DMA572 1 natural DYA230 or forced ventilation DY A231 DY A232 antiradiant shield Temperature and relative humidity sensor with analogue output complete with natural DMAS585 DMAS75 ventilation anti radiant shield Tempe
8. N NIE o gt gt Oo Ww ANT o 2 zl Z Zu OO og a or Lu Lu 7 2E Dhs elalssg DiN Of z HRE iai b lg jor INGRESSI ANALOGICI el KUA ANALOGUE INPUTS DOmV 7R H D 60 0 R DMAS 75 USCITA OUTPUT DEFAULT 4 20mA 2 NERO BLACK 60 300mV TEMP 3 BLU BLUE COMUNE COMMON 1 MARRONE BROWN 12V 4 RO 19 LSI Thermohygrometers User s manual Appendix E Connecion of DMA572 1 with DYA231 SCHEMA DI CONNESSIONE PER E Log E Log CONNECTION AO 3LIHM OONVI amp S FAZI MOTI3A 0 TIVIO HAZ AT O Q3a 0SS03 AlddNS IBMOd NVA VIOLNIA WIV 20 LSI Thermohygrometers User s manual Appendix F Substitution of the sensor element CAVO CAELE SVITARE IL PRESSACAWO UNSCREM THE GABLE GLAND I M STELO STEM LLL ELE LLL LL SENSOR FF ERAS lt a EVITARE COMPLETAMENTE LA PROTEZIONE A FILTRO POROGO UNSCREW THE POROUS FILTER PROTECTION COMPLETELY CITED A ESTRARRE DALLO STELO IL SEMSORE TIRANDOLO FUORI MISIDE AI FILI EXTRACT THE SEMSIR PULLIKE IT TOGETHER WITH THE WIRES CIRCUIT SEP THE SENSOR FROM THE CIRCUIT SEPARARE IL SENSORE DAL CIRCUITO SENSOR O INSERIRE IL CIRCUITO SUL NUOVO SENSORE AVENDO CURA DI INSERIRE I 3 CONTATTI ESTERNI DEL CIRCUITO SUI 3 ESTERO DEL SENSORE INSERT THE CIRCUIT ONTO THE NEW SENSOR BEING CAREFUL TO IMSERT THE 2 EXTERMAL CONTACTS OF THE CIRCUIT ON THE 2 EXTERNAL ONES OF TH
9. d to check the correct measurement values 10 Select CHIUDI to finish the calibration 12 LSI Thermohygrometers User s manual 9 Troubleshooting The troubleshooting procedure is designed to establish if the problem is with the sensor or with the data logger to which it is connected Test the probe See dia below a Disconnect the probe cable from the utility b Feed the sensor on the white and brown wires with its power supply C Measure a signal between its output range corresponding to a temperature range 30 70 C on blue and black wires d Measure a signal between its output range corresponding to a humidity range 0 100 on blue and red wires e If the result is positive the problem is with the data logger else the problem is with the probe White wire Brown wire ume Blue wires Black wire um Humidity output Red wire 13 LSI Thermohygrometers User s manual 10 Check list Thermo hygrometers STATION N iis node idos lol STATION NAME ob bi Do MEOS a dota ire eae Caneel buo Description of operational checks Every Yearly 6 Moths Date LL Check by re ee Check the porous filter is clean m NIE Check mesh of sensitive elements is clean heck mesh of sensitive elements is clean Check external anti radiant shield is cean external anti radiant shield is clean ZI et au temperature and humidity Check hygro sensitive element is clean X
10. e LSI Thermohygrometers User s manual 5 Application note 5 1 Humidity measurement in very hot weather In very wet tropical conditions it is possible for the humidity values to have a low dynamic range near the saturation conditions and at the same time to have a low temperature dynamic range and very low wind speed values In certain periods of the year those conditions are possible for short periods even in mild areas In such conditions the hygrocapacitive element can be wet from the dew without having the time to dry itself and to restore its measurement capacity In such case even if the humidity value decreases the humidity measurement stands near the saturation value or anyway overestimated Two conditions are possible The first is for every type of exchange type humidity sensor the second is typical for capacitive measurement type humidity sensors a The dew layer over the measurement element could be up to 0 25 mm thick the Penman theory says that n 8 hours are needed to dry this layer at 30 C 80 RH without air speed or n 4 hours at 30 C 60 RH without air speed Those period times could be shorter in case of forced ventilation on the humidity measurement element at least 1 5 m s b Hygrocapacitive element manufacturers advise that persisting wetness over the element could cause a secondary absorption phenomenon and a temporary drift of the humidity measurement of about 6 This error disappears when the el
11. ement is exposed for some hours at lower humidity values Those considerations confirm that the hygrocapacitive measurement element can be used when the humidity values have a sufficient dynamic range in order to permit the sensor to adjust itself from the stressed condition LSI Thermohygrometers User s manual G Testing 6 1 Visual external check 1 Check that the external anti radiant shield is clean and without bruises 2 Check that the fan in the forced ventilation models runs 6 2 Visual internal check 1 When the electronic box is open check that there is no trace of dew inside the box 2 Pull out the sensor from the shields and a Check that the porous filter protecting the sensitive elements is clean see 7 3 b Check that the hygrosensitive element is clean Use a magnifying glass to check if there is any dust or dew over the capacitive plate Do not touch the capacitive plate with hands If necessary the elements can be cleaned see 7 2 6 3 0perational check 1 Measure the ambient temperature and humidity with a reference thermohygrometer 2 Compare the reference measurement with the probe under testing Check that the accuracy of the probe under testing 1s inside its Accuracy range see 3 10 LSI Thermohygrometers User s manual 7 Maintenance 7 1 Cleaning of the radiation shield Clean the external anti radiant shield with a tooth brush 7 2 Cleaning of the measurement elements 1 Disconnect
12. rature and relative humidity sensor with Momo maso analogue output complete with forced DMAS569 DMA567 ventilation anti radiant shield LSI Thermohygrometers User s manual 2 Description 2 1 Main features Thermohygrometric sensitive element easily replaceable even by unskilled person Natural or forced ventilation anti radiant shield Relative humidity or dew point measurement Highly reflective anti radiant shield Analogic standard output 0 4 20 mA 01 5 Vcc 0 60 300 mVcc or LSI Lastem acquisition systems suitable output 2 2 Models DMAS72 is the sensor represented in the nearby picture Temperature sensitive element is a thermoresistance Pt100 type the humidity sensitive element is a capacitive plate One of the most important improvement of this line of sensors is the mounting of the sensitive element the transducers are supplied in an interchangeable capsule avoinding all the calibration processes For metereological application DMA572 must be equipped with anti radiant shield DY A230 natural ventilation DY A231 DY A232 forced ventilated DMAST75 and DMASS835 are provided with antiradiant shield with natural ventilation They have locally programmable analogical output 0 4 20mA 0 1 5V 0 60 300mV default 4 20mA DMAS75 has 12V power supply DMA585 has 24V power supply DMAS67 and DMAS569 are provided with forced ventilation antiradiant shield They have locally programmable analogical output
13. the cable from the probe 2 Pull out the sensor from the anti radiant shield by unscrewing the cable glands at the bottom 3 Unscrew the white porous filter protection 4 Pass over the Pt100 temperature measurement element surface a small very soft brush 5 Pass over the capacitive plate a very soft brush wetted with distilled water CAUTION the sensor needs 2 3 hours to measure correctly again It is possible to accelerate the drying it leaving the element for a few hours in a dry place or to a cold flow exposure 7 3 Cleaning the porous filter Clean it using a cold flow spray inside the filter 7 4 Drying the porous filter Sometimes due to the continuous high humidity values of tropical weather some wetness could resists around the humidity element inside the porous filter protection It wears out the capacitive element because the humidity around it is stable at high values even if after a certain time the ambient humidity decreases In this case spray the filter with a cold flow spray 7 5 Substituting the sensitive element The procedure to substitute the sensitive element is quite simple Appendix F depicts this substitution in details e Pull out the sensor from the anti radiant shield by unscrewing the cable glands at the bottom e Unscrew the white porous filter protection e Unscrew the protection cap as in the picture below e estract the sensitive element from his site and replace it with a new one LSI CODE ML
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