USER MANUAL VU01 - Hukseflux Brasil
Contents
1. Field Standard Practice for Field Meteorological Instruments pyranometers Recommended Use of Pyranometers and Methods of Observation practice for use Pyrheliometers and UV chapter 7 measurement of Radiometers radiation 7 3 measurement of global and diffuse solar radiation 7 4 measurement of total and long wave radiation BSRN Operations Manual Version 2 1 April 2005 vu0l manual v1406 11 23 Hukseflux Thermal Sensors 5 Installation of VUO1 5 1 Installation of the ventilation unit Once the VUOI cover is removed the ventilation unit can be mounted to a flat mounting surface using the supplied VUO1 mounting hardware Optionally a large hole can be made by the user in the mounting surface under VUO1 if obstruction of the airflow from the sides is expected for example by snow buildup The hole diameter should not exceed 120 x 10 m 5 2 Installation of the sensor e Remove the sun screen of SR20 IR20 IR20WS e Attach the sensor mounting plate to the bottom of the sensor using two M5x10 screws See Figure 5 2 1 A T25 torx key to do so is included with VUO1 e Affix the sensor with the sensor mounting plate to the ventilation unit using two M5x10 screws See Figure 5 2 1 for placement of the gasket e The sensor cable connector should be positioned alongside the engraved cable marking on the VUO1 base e The VUOI levelling feet can be used to finetune the sensor levelling Even with the VUO1 cover in2. Pack of 5 filters order code VUO1F 3 2 Dimensions of VUO1 140 Figure 3 2 1 Dimensions of VU01 in 10 m vu0l manual v1406 10 23 Hukseflux Thermal Sensors 4 Standards and recommended practices for use Pyranometers are classified according to the ISO 9060 standard and the WMO No 8 Guide In any application the instrument should be used in accordance with the recommended practices of ISO IEC WMO and or ASTM Pyrgeometers are not subject to standardisation The World Meteorological Organization WMO is a specialised agency of the United Nations It is the UN system s authoritative voice on the state and behaviour of the earth s atmosphere and climate WMO publishes WMO No 8 Guide to Meteorological Instruments and Methods of Observation in which paragraph 7 4 covers measurement of total and long wave radiation For ultra high accuracy measurements the following manual may serve as a reference Baseline Surface Radiation Network BSRN Operations Manual Version 2 1 L J B McArthur April 2005 WCRP 121 WMO TD No 1274 The BSRN manual also includes chapters on pyrgeometer installation and calibration Table 4 1 Standards with recommendations for instrument ventilation STANDARDS FOR INSTRUMENT USE FOR SOLAR AND LONGWAVE RADIATION ISO STANDARD EQUIVALENT WMO ASTM STANDARD ISO TR 9901 1990 ASTM G183 05 WMO No 8 Guide to Solar energy
3. Hukseflux has the following warranty and liability policy Hukseflux guarantees the supplied goods to be new free from defects related to bad performance of materials and free from faults that are clearly related to production and manufacturing Warranty on products is valid until 24 months after transfer of ownership The warranty does not apply if the application involves significant wear and tear if it involves use outside the specified range of application or if it involves accidental damage or misuse The warranty expires when anyone other than Hukseflux makes modifications to or repairs the products Hukseflux is in no event liable for damages to its customers or anyone claiming through these customers associated to the goods or services it supplies vu0l manual v1406 21 23 Hukseflux Thermal Sensors 7 6 EC declaration of conformity We Hukseflux Thermal Sensors B V Delftechpark 31 2628 XJ Delft The Netherlands in accordance with the requirements of the following directive 2004 108 EC The Electromagnetic Compatibility Directive hereby declare under our sole responsibility that Product model VUO1 Type Ventilation unit has been designed to comply and is in conformity with the relevant sections and applicable requirements of the directive lt LY a s Kees VAN DEN BOS Director Delft October 24 2013 vu0l manual v1406 22 23 2014 Hukseflux Thermal Sensors B V www hukseflux com Hukse
4. supply and cable length Using the alarm signal Maintenance and trouble shooting Recommended maintenance and quality assurance Trouble shooting Appendices Appendix on filter replacement Appendix on tools for VUO1 Appendix on spare parts for VUO1 Appendix on cable extension replacement Appendix on conditions of sale warranty and liability EC declaration of conformity vu0l manual v1406 H H HOO O0ISISISIUNU BA WN 3 23 Hukseflux Thermal Sensors List of symbols Quantities Symbol Unit Voltage output U V Electrical resistance Ra Q Current A Time in seconds t S Fan speed N l min Subscripts Ua alarm operating voltage Ua high alarm signal high Un tow alarm signal low Ng alarm trip speed limit l sink sink current vu0l manual v1406 4 23 Hukseflux Thermal Sensors Introduction VU01 is a high quality ventilation unit for use with pyranometer model SR20 and pyrgeometer models IR20 and IR20WS Its purpose is to improve the dependability of the measurement Measurement accuracy improves because offsets are reduced Reliability benefits from prevention of dew and frost formation and guick evaporation and sublimation of water and snow ISO TR 9901 Solar Energy Field Pyranometers Recommended practice for use recommends use of ventilators where high accuracy and reliability are reguired VUO1 provides an airflow over the instrument body and dome and has a 5 W and a 10 W heater on board to heat the air T
5. E DESCRI PTI ON VALUE UA Alarm operating voltage V lt 60 V Ua high Alarm signal high V U U A low Alarm signal low V lt 0 4 V I sink Sink current A 2 to 20 x 103 A Ra Resistor Q N Fan speed 1 min Ng Alarm trip speed limit 1 min 1500 min 100 min t2 Alarm start up delay time s lt 15s fan UA UA high or UA low fan yellow Figure 5 6 1 Wiring diagram required to use VUO1 s alarm function The use of the alarm signal is optional See table 5 4 1 for the electrical connection of VUO1 vu0l manual v1406 15 23 Hukseflux Thermal Sensors N 1 min Fan speed Ng time s V Ua high U A low time s Figure 5 6 2 An alarm signal Ua nigh is provided when the fan speed N is above the alarm trip speed limit Ng Using the alarm signal is optional vu0l manual v1406 16 23 Hukseflux Thermal Sensors 6 Maintenance and trouble shooting 6 1 Recommended maintenance and quality assurance For maintenance and trouble shooting of pyranometers and pyrgeometers consult the SR20 and IR20 manuals When conducting maintenance on VUO1 always power off the ventilation unit Powering off VUO1 may be done by disconnecting the VUO1 connector Table 6 1 1 Recommended maintenance of VU01 MINIMUM RECOMMENDED VENTILATION UNIT MAINTENANCE INTERVAL SUBJECT ACTION 1 1 week check check the operational status of the ventilator and heaters by checking the optional ala
6. Thermal Sensors Hukseflux USER MANUAL VUO1 Ventilation unit for SR20 pyranometers and IR20 pyrgeometers Copyright by Hukseflux manual v1406 www hukseflux com info hukseflux com Thermal Sensors f Hukseflux Warning statements A A A A Always power off the ventilation unit when conducting maintenance or installing VUO1 VUO1 is designed for use with standard SR20 IR20 amp IR20WS sensors VUOI is not meant to be used with other pyranometers and pyrgeometers including TR versions Accidentely exchanging the VUO1 cable and sensor cable will not damage the sensor but the instrument and ventilation unit will not function In case of cable replacement extension beyond 5 m please note that the voltage drop across the VUO1 cable becomes significant a higher voltage power supply may have to be used vu0l manual v1406 2 23 Hukseflux Thermal Sensors Contents Warning statements Contents List of symbols Introduction 1 N H O U BW N H N H PUNE NNNNNNNOD QIU RWW WNP Eee O U WUWN H Ordering and checking at delivery Ordering VUO1 Included items Options Quick instrument check Instrument principle and theory Specifications of VUO1 Specifications of VUO1 Dimensions of VUO1 Standards and recommended practices for use Installation of VUO1 Installation of the ventilation unit Installation of the sensor Installation of the VUO1 cover Electrical connection of VUO1 Power
7. ernal relays The alarm output may be used to monitor rotation of the fan The high low voltage output may be adjusted by the user with a fixed resistor For specifications of pyranometers and pyrgeometers and general considerations concerning site selection and maintenance fur such instruments please consult the SR20 and R20 manuals vu0l manual v1406 6 23 Hukseflux Thermal Sensors 1 Ordering and checking at delivery 1 1 Ordering VUO1 The standard configuration of VUOI is with 5 metres cable Options are longer cable in multiples of 5 m and a pack of 5 filters Supply of products is subject to Hukseflux General Conditions of Sale The product warranty involving repair or replacement without charge for product or working hours is 24 months Hukseflux does not accept any liability for losses or damages related to use of the supplied products See the appendix and Hukseflux General Conditions of Sale for detailed statements on warranty and liability 1 2 Included items Arriving at the customer the delivery should include e ventilation unit VUO1 e cable of the length as ordered e sensor mounting hardware affixed to VUO1 1x sensor mounting plate and gasket 4x M5x10 screw e torx key T25 1 x e VUOI mounting hardware 2 x M5x60 screw 2x M5 retaining torque nut 4x 5x 103 m washer e spare filter 1 x e product certificate e any other options as ordered 1 3 Options e longer cable in m
8. essary vu0l manual v1406 8 23 Hukseflux Thermal Sensors 3 Specifications of VUO1 3 1 Specifications of VUO1 VUOI is a high quality ventilation unit that may be used with pyranometer model SR20 and pyrgeometer models IR20 and IR20WS Its purpose is to improve the dependability of the measurement Measurement accuracy improves because offsets are reduced Reliability benefits from prevention of dew and frost formation and guick evaporation and sublimation of water and snow For specifications of pyranometers and pyrgeometers please consult the SR20 and IR20 manuals Table 3 1 1 Specifications of VUO1 continued on next page VUO1 SPECI FI CATIONS Compatible instruments SR20 IR20 IR20WS Excluded TR versions Compliance with standards ISO TR 9901 BSRN operations manual Rated operating power 7 8 W at 12 VDC unheated Rated operating voltage range 10 8 to 13 2 V Rated operating temperature range 40 to 70 C Alarm output high low adjustable voltage optional use Heater 5 and 10 W at 12 VDC optional use with remote relays Increase of air temperature 0 5 C at O W heating 1 0 C at 5 W heating 1 5 C at 10 W heating Zero offset a SR20 ventilated 2 5 W m at 0 W heating Offset SR20 by heating 2 W m at 5 W heating Offset SR20 by heating 4 W m at 10 W heating Offset IR20 by heating 0 W m at 5 W heating O
9. f VUO1 The cables of VUO1 and SR20 IR20 have an identical M16 straight connector Do not connect the VUO1 connector to the SR20 IR20 cable and do not connect the SR20 IR20 connector to the VUOI cable both VUO1 and SR20 IR20 will not function Cables generally act as a source of distortion by picking up capacitive noise We recommend keeping the distance between a datalogger or amplifier and the sensor as short as possible For cable extension see the next paragraph and appendix on this subject Table 5 4 1 The electrical connection of VU01 The heaters and alarm signal are not necessarily used their use is optional PIN WIRE vuol CONNECTION 1 fan 12 VDC 4 fan common 6 alarm see figure 5 6 1 2 heater 1 12 VDC 8 heater 1 common 3 heater 2 12 VDC 5 heater 2 common 7 White not connected not connected 9 shield ground Optionally an alarm signal can be connected by the user as shown in the wiring diagram in figure 5 6 1 See paragraph 5 6 in this manual on using the alarm signal 5 5 Power supply and cable length In case of cable replacement or extension beyond 5 m please note that the voltage drop across the regular VUO1 cable becomes significant and that a higher voltage power supply or a thicker cable may be used Using a 12 VDC power supply and a cable of 5 m the voltage drop is around 1 V and the VUO1 ventilator will effectively run on 11 VDC The ve
10. ffset IR20 by heating 0 W m at 10 W heating Cable resistance 0 3 Q m 2 x 0 15 Q m Voltage drop at 7 8 W ventilation 0 2 V m Voltage drop at 10 W heating power 0 24 V m Footprint diameter 0 17 m Fan speed 5050 to 5400 1 min at 12 VDC depends on supply voltage Standard cable length see options 5m Cable diameter 5 3x 103 m VUO1 connector M16 straight connector male thread 10 pole VUO1 connector type HUMMEL AG 7 820 400 000 straight connector male thread for cable 5 to 9 x 103 m Cable connector M16 straight connector female thread 10 pole Cable connector type HUMMEL AG 7 810 300 00M straight connector female thread for cable 3 to 6 x 103 m special version Connector protection class IP 67 IP 69 K per EN 60 529 connected Cable replacement replacement cable with cable connector can be ordered separately from Hukseflux IP protection class VUO1 IP 54 SR20 and IR20 IP 67 Gross weight including 5 m cable 1 55 kg Net weight including 5 m cable 1 35 kg Packaging box of 200 x 200 x 150 x 103 m vu0l manual v1406 9 23 Hukseflux Thermal Sensors Table 3 1 1 Specifications of VUO1 continued VERSIONS OPTIONS ACCESSORIES Longer cable in multiples of 5 metres option code total cable length please note the voltage drop of cabling in case of cables longer than 15 m consult Hukseflux
11. flux Thermal Sensors B V reserves the right to change specifications without notice
12. he VUO1 ventilation unit runs on 12 VDC voltage VUO1 may be used in combination with Hukseflux SR20 secondary standard pyranometers and IR20 and IR20WS research grade pyrgeometers Ventilation promotes thermal equilibrium between all components of radiometers and thereby reduces zero offsets Dew and frost formation is prevented Additional heating will promote evaporation of water droplets and sublimation of snow It should be noted that heating in combination with pyranometers will lead to increased thermal offsets so heating is only recommended if necessary Using VUOI is easy The ventilator is generally used continuously the heater is typically controlled by the datalogger ISO TR 9901 Solar Energy Field Pyranometers Recommended practice for use recommends use of ventilators where high accuracy and reliability are required More details can be found in paragraph 5 2 2 and annex A The Baseline Surface Radiation Network BSRN recommends ventilation for radiometers in its BSRN operations manual v2 1 62 Figure 0 1 VUOI ventilation unit with SR20 secondary standard pyranometer vu01 manual v1406 5 23 Hukseflux Thermal Sensors VUO1 is designed using high quality materials in agreement with the recommendations of ISO TR 9901 and BSRN The footprint of VUO1 is small which prevents accumulation of snow The ventilator power is relatively high in order to increase the airflow The heaters should be activated using ext
13. ntilator will continue running down to a supply voltage of around 7 5 VDC the flow rate will however decrease significantly based on power by a factor 4 This level is reached at a cable length of 20 m We recommend to adapt the supply voltage or use cables with a lower resistance per meter when working with cable lengths longer than 15 m the ventilator then works at 9 VDC at a flow rate of 80 relative to 5 m cable vu0l manual v1406 14 23 Hukseflux Thermal Sensors 5 6 Using the alarm signal Using the alarm signal is optional the alarm output may be used to monitor rotation of the fan The VUO1 alarm emits a high continuous signal during trouble free operation of the fan When opting for using the alarm signal see figure 5 6 1 and paragraph 5 4 for the electrical connection of VUO1 To use the alarm the user must supply an alarm operating voltage U of maximum 60 VDC An external load resistor is required to make sure the sink current is between 2 and 20 x 10 A For example using a 1000 Q load resistor will allow alarm operating voltages between 2 and 20 VDC A signal Uanign is provided when the fan speed N is above the alarm trip speed limit Ng of 1500 rotations per minute The signal is equal to the alarm operating voltage U4 When the fan is running slowly or not at all a low signal Ua jow is provided The alarm will only function when VUO1 itself is powered Table 5 6 1 Alarm signal variables VARIABL
14. rm signal or by on site inspection 2 1 week cleaning clean ventilator cover and ensure air inlet is free of obstructions such as leaves or snow buildup 3 1 year filter replace ventilator filter as described in the appendix 6 2 Trouble shooting Table 6 2 1 Trouble shooting for VU0O1 PROBLEM SOLUTI ON Fan and or heaters do not function check wiring for correct connection of and check power supply Fan does not work check for obstructions of fan Fan provides little airflow check for obstructions of airflow replace filter if clogged check wiring connections vu0l manual v1406 17 23 Hukseflux Thermal Sensors vu0l manual v1406 18 23 Hukseflux Thermal Sensors 7 Appendices 7 1 Appendix on filter replacement To replace the filter power off the ventilation unit by disconnecting the VUO1 connector insert the tip of a flat screwdriver in the designated slot of the front side the filter retainer turn the screwdriver 90 to detach the filter retainer from the finger guard replace the used filter cloth with a fresh filter Spare part VUO1F slide the filter retainer under the ventilation unit take care to position the slot to the front thumb screw side of the ventilation unit lift and click the filter retainer in place 7 2 Appendix on tools for VUO1 Table 7 2 1 Specifications of tools for VUO1 tooling required for sensor mounting and removal torx key T25 included
15. rred specifications for VUO1 cable replacement and extension General replacement please order a new cable with connector at Hukseflux or choose for a DIY approach In case of DIY replacement by the user see connector specifications below and ask for the DIY connector assembly guide General cable extension please order a new cable with connector at Hukseflux or solder the new cable conductors and shield to the original sensor cable and make a connection using adhesive lined heat shrink tubing with specifications for outdoor use Always connect shield Connectors used VUO01 M16 straight connector male thread 10 pole HUMMEL AG 7 820 400 000 straight connector for cable 5 to 9 x 103 m cable M16 straight connector female thread 10 pole HUMMEL AG 7 810 300 00M straight connector for cable 3 to 6 x 103 m special version Cable 8 wire shielded with copper conductors at Hukseflux 8 wire shielded cable is used of which 2 wires are used to power the fan 4 for heating and 1 for the alarm signal Conductor resistance lt 0 1 Q m Length cables should be kept as short as possible in case of cables longer than 15 m consult Hukseflux Outer sheath with specifications for outdoor use for good stability in outdoor applications vu0l manual v1406 20 23 Hukseflux Thermal Sensors 7 5 Appendix on conditions of sale warranty and liability Delivery of goods is subject to Hukseflux General Conditions of Sale
16. stalled see next page the sensor can still be levelled since the instrument s bubble level is still visible below the VUO1 cover sensor VUO1 sensor mounting plate S VUO1 gasket VUO1 base Figure 5 2 1 VUO1 base with gasket sensor mounting plate and SR20 pyranometer the instrument is affixed to VUO1 using four M5x10 screws vu0l manual v1406 12 23 Hukseflux Thermal Sensors 5 3 Installation of the VUO1 cover To install e Connect the sensor cable connector 3 to the sensor guiding the connector through the designated hole in the VUO1 cover e Position the cover 2 at an angle on positioning pin 5 e Close the cover using positioning pin 5 as swivel point e Affix the cover using thumbscrew 1 e Connect the VUOI cable connector to the VUO1 connector 4 To remove cover e Loosen thumbscrew 1 by turning counterclockwise until the tapered part of the thumbscrew is ejected from the ventilation unit base e Lift the cover tilting around positioning pin 5 Q Figure 5 3 1 Installation and removal of ventilator cover 1 VUO1 thumbscrew 2 VUO1 cover 3 sensor connector 4 VUO1 connector 5 VUOI positioning pin Figure 5 3 2 Cutaway of VU01 showing internal components and SR20 pyranometer vu0l manual v1406 13 23 Hukseflux Thermal Sensors 5 4 Electrical connection o
17. tooling required for fixing VUO1 to platform hex key 3 tooling required for filter replacement screwdriver flat 7 3 Appendix on spare parts for VUO1 levelling feet set of 2 static foot cover pack of 5 filters cable with cable connector specify length in multiples of 5 m in case of cables longer than 15 metres please consult Hukseflux vu0l manual v1406 19 23 Hukseflux Thermal Sensors 7 4 Appendix on cable extension replacement When opting for cable extension or cable replacement please note the voltage drop in cabling In case of cables longer than 15 metres consult Hukseflux See the specific paragraph in this manual about power supply and cable length The cable of VUOI is equipped with a M16 straight connector In case of cable replacement it is recommended to purchase a new cable with cable connector at Hukseflux An alternative is to choose for a Do it yourself DIY approach please ask for the DIY connector assembly guide In case of cable extension the user may choose between purchasing a new cable with cable connector at Hukseflux or extending the existing cable himself Please note that Hukseflux does not provide support for DIY connector and cable assembly Cables act as a source of distortion by picking up capacitive noise Keep the distance between data logger or amplifier and sensor as short as possible VUO1 connector cable and cable connection specifications are summarised below Table 7 1 1 Prefe
18. ultiples of 5 metres please note the voltage drop of cabling Specify total cable length In case of cables longer than 15 m consult Hukseflux e pack of 5 filters Specify order number VUOIF 1 4 Quick instrument check A quick test of the ventilation unit can be done by using a simple hand held multimeter and a 12 VDC power supply using the wiring diagram in chapter 5 of this manual 1 Check the electrical resistance of the heaters 27 Q each 2 Connect fan wires to a 12 VDC power supply the fan should run 3 When running an alarm signal can be measured see chapter 5 for the optional alarm configuration instructions vu01 manual v1406 7 23 Hukseflux Thermal Sensors 2 Instrument principle and theory Figure 2 1 Overview of VU01 with SR20 1 SR20 cable 2 SR20 connector 3 SR20 dome 4 VUOI cover 5 VUOI fixation of cover 6 VUO1 levelling feet 7 VUOI filter retainer 8 VUOI ventilator heaters and filter replacement system below cover 9 VUOI connector 10 VUOI cable and cable connector Ventilation promotes thermal eguilibrium between all components of radiometers and thereby reduces zero offsets Dew and frost formation is prevented Additional heating will promote evaporation of water droplets and sublimation of snow It should be noted that heating in combination with pyranometers will lead to increased thermal offsets so heating is only recommended if nec
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