LP SD18 - Delta Ohm S.r.l.
Contents
1. Fig 1 Support for installation of the sunshine duration sensor on a mast LP SD 18 xV Fig 2 Base for installation of the sunshine duration sensor on a horizontal plane LP SD 18 x0 e Before orienting the Sunshine Duration Sensor to its final position place it verti cally and adjust the base for installation on a plane or support for installation on a 40 mm mast feet so that the level on the upper side of the instrument is perfectly levelled Fig 3 200 165 Fig 3 levelling of the instruments e Orient the Sunshine Duration Sensor so that the index of the graduated scale of the support matches the value 90 Latitude and the top where the spirit level is placed is directed towards the NORTH pole if used in the northern hemisphere or towards south if used in the southern hemisphere Fig 4 5 Latitude z SE VIM hhhhhhhshssshhshd Fig 4 Orienting of the Sunshine Duration Sensor The angle that instrument axis should make with respect to the ground is equal to the latitude of the installation site this way the axis of the instrument will be parallel to the earth axis North South Fig 5 Fig 5 Orientation of the Sunshine Duration Sensor Electrical Connections All the versions of the Sunshine Duration Sensor are equipped with an 8 pin M12 con nector Upon request cables with 8 pin M12 female connector with 5 or 10 m s2. II 41 LP SD18 GB Sunshine duration sensor GB Description The Sunshine Duration sensor LP SD18 measures sunshine status and duration The WMO World Meteorological Organization defines the sunshine duration as the time during which the direct solar radiation exceeds the level of 120 W m The LP SD18 performs the measure of radiation with an array of photodiodes arranged in a particular geometry which allows to obtain an accurate measurement in any weather conditions This solution avoids the use of mechanical moving parts and ensures high reliability over time The instrument besides indicating the presence of sun as required by the WMO measures also direct radiation SRD therefore it can be used as a low cost alterna tive to a pyrheliometer which use is bound to a solar tracker The instrument is available in three versions which differ in the type of output LP SD18 1 RS485 MODBUS RTU output and volt free contact output contact closed SRD gt 120 W m contact open SRD lt 120 W m LP SD18 2 RS485 MODBUS RTU output analog voltage output 0 1 Vdc which cor responds to 0 2000 W m of direct radiation and digital output voltage digital voltage output 1V SRD gt 120 W m OV SRD lt 120 W m LP SD18 3 SDI 12 output and volt free contact output contact closed SRD gt 120 W m contact open SRD lt 120 W m The LP SD18 is equipped with a separately heating e
3. M12 connector on one side free wires on the other side RS 48 RS485 connection cable with built in USB RS485 converter The cable is equipped with a USB connector for the connection to a PC on one side and 3 separated wires on the instrument side R Heating option for installation in harsh climates for the removal of ice and snow Activation of heating below 6 C Power absorbed by heating 5W 12 Vdc Manufacture of portable bench top and process scientific instruments Current and voltage loop transmitters and regulators Temperature Humidity Dew point Pressure CO CO Air speed Light Optical Radiation Acoustics Vibration Data logger Data logger wireless Microclimate pH Conductivity Dissolved Oxygen Turbidity Elements for weather stations NZ BEA ACCREDIA X L ENTE ITALIANO DI ACCREDITAMENTO 2 WIS CIM TANS LAT N 124 Signatory of EA IAF and ILAC Mutual Recognition Agreements Temperature Humidity Pressure Air speed Photometry Radiometry Acoustics CE CONFORMITY e Safety EN61000 4 2 EN61010 1 Level 3 e Electrostatic discharge EN61000 4 2 Level 3 e Electric fast transients EN61000 4 4 Level 3 EN61000 4 5 Level 3 e Voltage variations EN61000 4 11 e Electromagnetic interference susceptibility IEC 1000 4 3 e Electromagnetic interference emission EN55022 class B z x Delta Ohm srl Via G Marconi 5 35030 Caselle di Selvazzano Pd Tel 0039 0498977150 r a Fax
4. in the measure of temperature 16 bit integer Bit2 1 data memory error Bit3 1 program memory error Number of seconds in the last minute with radiation 7 9 i higher than 120 W m number between 0 and 60 16 bit integer Number of tens of seconds in the last 10 minutes with radiation gt 120 W m number between 0 and 6 5 60 for each interval of 10 s in the last 10 minutes 16 bit integer is counted a 1 if SRD gt 120 W m for at least 5 s For a higher resolution use the register number 5 Status of the sun presence absence contact 7 6 0 SRD lt 120 W m open contact 16 bit integer 1 SRD gt 120 W m closed contact 8 7 Status of heating 0 off 1 on 16 bit integer Temperature in C x10 below this value the hea hii 9 8 ting turns on 16 bit integer The LP D18 3 is equipped with an SDI 12 communication interface compliant with the version 1 3 of the protocol which allows the connection to SDI 12 sensor networks The commands available are described in detail in the operat ing manual supplied with the instrument For more information about the protocol visit the website www sdi 12 org LPSD18 HEATING Blank no heating R with heating INSTALLATION B basic version 0 version for installation on the horizontal base V version for installation on a vertical mast OUTPUT 1 RS485 MODBUS RTU output and volt free contact output 2 RS485 MODBUS R
5. supply 7 30 Vdc It can be fixed on a mast option V with a suitable accessory or installed on an horizontal surface option 0 by using the optional mounting base Built in spirit level for levelling The sensor does not require any adjustment of its position during the year Equipped with anti condensation system 1W 12 Vdc 8 pin M12 connector included 5 or 10 m standard cables with 8 pin M12 female connector are available upon request Available with heating option option R for installation in harsh climates for the removal of ice and snow Activation of heating below 6 C Power absorbed by heating 5W 12 Vdc LP SD18 3 Sensor for measuring sunshine duration referred to the 120 W m thresh old of direct radiation according to WMO indications This sensor has no moving parts SDI 12 output and volt free contact output closed radiation above the threshold open radiation below the threshold Power supply 7 30 Vdc It can be fixed on a mast option V with a suitable accessory or installed on an horizontal sur face option 0 by using the optional mounting base Built in spirit level for levelling The sensor does not require any adjustment of its position during the year Equipped with anti condensation system 1W 12 Vdc 8 pin M12 connector included 5 or 10 m standard cables with 8 pin M12 female connector are available upon request Available with heating option option R for installation in harsh climates for the re
6. wash the surface with water and dry thoroughly In order to avoid the formation of condensation a heating element is present inside the instrument 1W 12 Vdc when connected moreover a special cartridge with desiccant material is included that prevents the condensation also in the case where it is not possible to use the heating for example to reduce consump tion The efficiency of Silica gel decreases over time due to moisture absorption When crystals of silica gel are efficient their colour is yellow when gradually losing their efficiency the colour turns blue The user manual of the instrument describes the procedure for replacing them Typically the duration of the silica gel varies from 2 to 6 months depending on the environmental conditions in which the sunshine duration sensor is working Serial communication Both LP D18 1 and LP SD18 2 are equipped with a RS485 MODBUS RTU protocol output The measured values and the status of the instrument can be read in MODBUS RTU mode by using the 04h function code Read Input Registers The following table lists the MODBUS registers available MODBUS Registers Register Register number address Datum Format 1 0 Internal temperature C x10 16 bit integer 2 1 Internal temperature F x10 16 bit integer 3 2 Direct radiation SRD Direct Sunshine in W m 16 bit integer Status register Bit0 1 error in the measure of radiation 4 3 Biti 1 error
7. 0039 049635596 E mail info deltaohm com Web Site www deltaohm com Italy
8. TU output 0 1 Vdc voltage analog output and 0 1 V voltage digital output 3 SDI 12 output and volt free contact output ORDERING CODES LP SD18 1 Sensor for measuring sunshine duration referred to the 120 W m threshold of direct radiation according to WMO indications This sensor has no moving parts RS485 MODBUS RTU output and volt free contact output closed radiation above the threshold open radiation below the threshold Power supply 7 30 Vdc It can be fixed on a mast option V with a suitable accessory or installed on an hori zontal surface option 0 by using the optional mounting base Built in spirit level for levelling The sensor does not require any adjustment of its position during the year Equipped with anti condensation system 1W 12 Vdc 8 pin M12 connector included 5 or 10 m standard cables with 8 pin M12 female connector are available upon request Available with heating option option R for installation in harsh climates for the removal of ice and snow Activation of heating below 6 C Power absorbed by heating 5W 12Vdc LP SD18 2 Sensor for measuring sunshine duration referred to the 120 W m thresh old of direct radiation according to WMO indications This sensor has no moving parts RS485 MODBUS RTU output 0 1 Vdc voltage analog output corresponding to 0 2000 W m of direct radiation voltage digital output 1V radiation above the threshold OV radiation below the threshold Power
9. ght In order to avoid the formation of condensation inside the instrument in addition to the heating element the LPSD18 is supplied with a cartridge that must be loaded with desiccant material in colloidal silica Silica gel Technical specifications Sensitive elements Spectral range Direct radiation SRD measuring range Accuracy of the measurement of direct radiation Accuracy of the measurement of the sunshine duration sensor 16 Silicon photodiodes 360 1100 nm 0 2000 W m Better than 90 on the monthly total Better than 90 on the monthly total Response time lt 1 second Threshold value 120 W m Sunshine duration resolution 1 sec Power supply 7 30 Vdc Consumption 5mA 12V Heating system 12 15 Vdc Anti condensation device consumption 1W 12V Antifreeze device consumption 5W 12V ON for internal Temp lt 6 C OFF for internal Temp gt 10 C Internal temperature Measuring range 40 80 C Accuracy 0 5 C Operating temperature 40 80 C Weight 0 9 kg Protection degree IP66 Outputs LP SD18 1 e RS485 MODBUS RTU e Galvanically isolated contact closed SRD 120 W m open SRD lt 120 W m LP SD18 2 e RS485 MODBUS RTU e Analog output 0 1V 0 2000 W m Digital output 0 1V 1V SRD 120 W m OV SRD lt 120 W m LP SD18 3 e SDI 12 Galvanically isolated contact closed SRD gt 120 W m open SRD lt 120 W m Installation of the sunshine du
10. lement powered and galvani cally isolated which prevents the formation of condensation on the glass surface onto which the sensitive elements are placed For harsh climates the above men tioned versions are available with a second heating element option R LP SD18 xR which prevents the formation of ice and prevents snow from settling The instrument does not need any positioning adjustment during the year and it can be installed on a mast or on a proper fixing base optional The application fields are multiple from the agronomy agricultural science to the study the growth of crops to photovoltaic systems for verifying their performance to building automations for automatic opening closing of blinds shutters and in gen eral to all those areas where it is necessary to monitor the presence of sunlight Operating Principle The Sunshine Duration LPSD18 is based on the use of 16 sensors arranged in such a way that in the presence of sun at least one of the photo detectors is exposed to sun light directly from the sun besides the diffusion component Those sensors which are not directly illuminated by the sun are used for the meas urement of the diffused light that is subtracted from the measurement of the sensor which sees the sun directly to get direct radiation The cylindrical glass protects the sensors and the internal circuits of the instrument from the weather and at the same time provides an excellent transparency to sunli
11. moval of ice and snow Activation of heating below 6 C Power absorbed by heating 5W 12 Vdc LP SD18 xB basic version of the sunshine duration sensor for installation on a flat base by using the support included The Sunshine Duration Sensor has a fixed inclination of 45 with respect to the fixing plane LP SD18 0 Base for installation of the sunshine duration sensor on a horizontal plane Two adjustable feet and one fixed foot Allows the inclination of the sensor up to 80 from the vertical to suit the position of the sun to the latitude of the place of installation LP SD18 V Support for installation of the sunshine duration sensor on a mast 40 mm Allows the inclination of the sensor up to 80 from the vertical to suit the position of the sun to the latitude of the place of installation LP SD18 19K Basic support for installation of the sunshine duration sensor on a plane The sunshine duration sensor has 45 fixed inclination with respect to the fixing plane LP SD18 22K Support for installation of the base LP SD18 0 on a 40 mm mast HD 2003 83 40 mm mast 1 5 m length for version V M37x2 mm thread HD 2003 83 1 40 mm mast 750 mm length for version V M37x2 mm thread LP SG Cartridge for containing crystals of silica gel with O ring LP G Pack of 5 cartridges of the silica gel CP 18 5 12 pole cable 5 m long 8 pin M12 connector on one side free wires on the other side CP 18 10 12 pole cable 10 m long 8 pin
12. ration sensor The sunshine duration sensor should be installed in a place easy to be reached for the periodical cleaning of the glass and the maintenance At the same time it should be avoided that buildings trees or obstructions of any kind exceed the horizontal plane on which the sunshine duration is placed It is acceptable to choose a location where obstacles in the path of the sun from sunrise to sunset is less than 5 from the horizontal plane of the sunshine duration sensor It should be also checked that there are no reflec tive elements that may alter the measure The LP SD18 does not need any positioning adjustment during the year Three installation methods are possible LP SD18 xB basic version for installation on a flat base by using the support included The Sunshine Duration Sensor has a fixed inclination of 45 with respect to the fixing plane LP SD18 x0 version for installation on the base LP SD18 0 The base allows the incli nation of the sensor up to 80 respect to the vertical so to fit it to the position of the sun to the latitude of the place of installation Two adjustable feet and one fixed foot allow to put the sensor on an horizontal plane Fig 2 LP SD18 xV version for installation on a vertical 40 mm mast by using the LP SD18 V support This support allows to tilt the sensor up to 80 respect to the vertical so to fit it to the position of the sun to the latitude of the place of installation Fig 1
13. tandard length are available other lengths available upon request 3 5 EDS 9 10 11 Numbering on the wires of the cable US f Instrument M12 male Connector LP SD18 1 and LP SD18 1R Connector 12 pin cable Numbering Maley Numbering 1 Power supply negative 12 2 Power supply positive 1 3 Heating 3 4 RS485 A 9 5 RS485 B 5 6 Volt free contact output 8 7 Heating 10 8 Volt free contact output 11 E LP SD18 2 and LP SD18 2R Connector 5 12 pin cable Numbering ATE Numbering Power supply negative 1 0 1V analog output negative 12 0 1V digital output negative 2 Power supply positive 1 3 Heating 4 RS485 A 5 RS485 B 6 0 1V digital output positive 8 7 Heating 10 8 0 1V analog output positive 11 LP SD18 3 and LP SD18 3R Connector f 12 pin cable Numbering function Numbering 1 Power supply negative 12 2 Power supply positive 3 Heating 4 NC a sDI 12 6 Volt free contact output ae ee 7 Heating 10 8 Volt free contact output 11 The connection of the heating is not polarized the two wires can be reversed Maintenance In order to ensure the declared high accuracy of the measures it is necessary that the protective glass is kept clean Cleaning can be performed with optical microfiber cloths for camera lenses and with some water if not enough use pure ethyl alcohol After cleaning with alcohol it is necessary to
Download Pdf Manuals
Related Search