Delta-T UV3pA User Manual Download Page 1

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User Manual for the

UV Radiation

Sensors

types

UV3pA, B and AB

UV3-UM-1.1

Delta-T Devices Ltd

Summary of Contents for UV3pA

Page 1: ...User Manual for the UV Radiation Sensors types UV3pA B and AB UV3 UM 1 1 Delta T Devices Ltd ...

Page 2: ...lta T Devices Limited CE conformity UV3pA B and AB The sensors described in this document are CE marked by the manufacturer Design changes Delta T Devices Ltd reserves the right to change the designs and specifications of its products at any time without prior notice User Manual Version 1 1 August 2003 Delta T Devices Ltd Tel 44 1638 742922 128 Low Road Burwell Fax 44 1638 743155 CAMBRIDGE CB5 0EJ...

Page 3: ... Requirements 9 UV3p Logger Connections 10 DL2e Logger 10 UV3p Wiring Schematic for DL2e 10 DL3000 Logger 12 Other Loggers 12 Specifications 13 Spectral Response 13 Cosine Response 14 UV3p Specification Table 15 Amplifier characteristics 16 Certification 16 Maintenance 18 Routine Maintenance 18 Recalibration 18 Storage 18 Warranty and Service 19 Terms and Conditions of Sale 19 Service and Spares 2...

Page 4: ... 20 Technical Support 20 Problems 21 Appendices 22 UV Measurement Techniques 22 Environmental Monitoring Note UV AN 1 1 22 Measurements from different light sources 23 Glossary 23 4 z Introduction UV3 User Manual 1 1 ...

Page 5: ...t output signal that is suitable for data logging The sensor can be supplied with an optional levelling mount The UV3p sensors are improved versions of the former UV2p sensors with the following features Millivolt output with preset standard sensitivity Data logger compatible High stability low temperature coefficient photodiodes Self cleaning stay dry diffuser with water drainage slots Good cosin...

Page 6: ...sor s serial number s and check that the cable supplied is the length that was ordered The serial numbers will be needed in any subsequent warranty claims repairs or recalibration The parts supplied may include UV3pA B or AB sensor with cable fitted Levelling mount or other mounting bracket Cable lengths other than the standard 5m that are pre ordered will normally be fitted in unbroken lengths De...

Page 7: ...ounted horizontally for most solar radiation insolation studies The readings then give the irradiance W m 2 of a horizontal surface A levelling mount is offered as an option or you can easily make up your own mounting plate If you need to remove excess length of cable at this stage simply cut off the excess but allow for a sufficient length of the cable screen Levelling Mount type SRLF1 This is a ...

Page 8: ... with 5m of 4 core screened cable with bare wire ends as standard Conductor Function Notes Blue UV Signal HI Green UV Signal LO Common with Power 0V inside the sensor Do not link this wire with Power 0V yellow It may create reading errors Red Power V Yellow Power 0V Screen screen Connected to metal body of sensor Not connected to any other conductors Power Requirements Power supply 7 15 V dc unsta...

Page 9: ...ordering The UV signal voltage output is not sensitive to the cable length within this limit Data Requirements Typical common usage UV irradiance output Sample every minute Average every hour or half hour UV3 User Manual 1 1 UV3p Sensor Connections z 9 ...

Page 10: ...r to the DL2e Logger User Manual UV3p Wiring Schematic for DL2e UV Signal LO green Power V red Power 0V yellow Screen 61 62 63 NO NC 64 NO NC 2 1 3 4 5 BL R GN UV Signal HI blue Y or connect to logger frame Settings The example shows the UV3p sensor output connected to analogue channel number 1 in the DL2e logger 10 z UV3p Logger Connections UV3 User Manual 1 1 ...

Page 11: ...e also used for the Power 0V return DL2e Sensor Codes UV3pA B or AB When creating your DL2e logger configuration with the LS2e software you can use the UVP sensor code provided Warning Do not use the sensor code UV from much earlier releases It has a different conversion factor that will give incorrect results if used with the UV3p sensors If you have an earlier release of the LS2e software you ca...

Page 12: ...ing and logging intervals see data requirements Please consult Delta T Technical Support if you need further assistance Other Loggers Any logger with a sensitive differential mV input range e g 0 50 mV and a facility for powering up sensors can be used for the UV3p range of sensors Follow the general principles laid out above 12 z UV3p Logger Connections UV3 User Manual 1 1 ...

Page 13: ...ral Response 0 20 40 60 80 100 120 320 330 340 350 360 370 380 390 400 410 Wavelength nm Response Figure 2 UV3pB Relative Spectral Response 0 20 40 60 80 100 120 270 280 290 300 310 320 330 340 350 360 Wavelength nm Response UV3 User Manual 1 1 Specifications z 13 ...

Page 14: ...ectral Response 0 20 40 60 80 100 120 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 Wavelength nm Response Cosine Response Figure 4 True Cosine 60 30 UV3p Detector 14 z Specifications UV3 User Manual 1 1 ...

Page 15: ... B 0 200 W m 2 AB Cosine corrected Within 5 up to 70º incidence See Fig 4 Operating range 20 to 60 C A B 10 to 60 C AB Storage range 40 to 60 C A B 20 to 60 C AB Voltage supply 7 15 V dc 2 mA Warm up period 10 seconds recommended Amplifier type Transimpedance Amplifier offset drift Typical 0 3 µV per C Positive for increasing temperature Additional to photodiode error Size mm 48 high x 50 dia base...

Page 16: ... m 2 per C Positive for increasing temperature This error is in addition to any error contributed by the photodiode Certification CE Conformity Delta T Devices Ltd holds a CE Declaration of Conformity issued by the manufacturer The manufacturer certifies that Ultra violet detectors with integral amplifiers model numbers UV3pA UV3pB and UV3pAB comply with European directive EMC 89 36 EEC for Radiat...

Page 17: ...120R11 921011 D18 and the National Bureau of Standards within the limitations of the NPL s and the NBS s calibration services or have been derived from known values of physical contacts MODEL UV3pA SERIAL NUMBER 6252 UV3pA 112 CERTIFICATE NUMBER 7438 2 DATE ISSUED 22nd June 2000 VALID 12 months CALIBRATION DETAILS SOURCE Xenon Arc Lamp LTE 030 TRANSFER STANDARD CAL105A Cos LTE 043 373nm POWER LEVE...

Page 18: ...quid detergent will be sufficient Do not remove the base plate screws There are no user accessible controls inside Recalibration The calibration certificate validity period is 12 months Annual recalibration is essential Return the sensor to Delta T Contact your agent or Delta T direct in advance for prices and despatch instructions before returning the unit Storage Observe the storage temperature ...

Page 19: ...ge at Delta T s premises in the UK during the warranty period If Delta T requires that goods under warranty be returned to them from overseas for repair Delta T shall not be liable for the cost of carriage or for customs clearance in respect of such goods However we much prefer to have such returns discussed with us in advance and we may at our discretion waive these charges Delta T shall not be l...

Page 20: ...orking days of receiving the equipment However if the equipment has to be forwarded to our original supplier for specialist repairs or recalibration additional delays of a few weeks may be expected Troubleshooting Technical Support Technical Support is available on Delta T products and systems Users in countries that have a Delta T Agent or Technical Representative should contact them in the first...

Page 21: ...st meter check the voltage output when the sensor is exposed to UV light If the output is correct re make the logger connections Re check the logger channel configuration Ensure that the warm up function is correctly configured Symptom Possible cause or remedy No output from UV sensor Check UV light output with another UV sensor Provide another source of UV light Zero output signal from UV sensor ...

Page 22: ...UVB radiation is important because it is known to cause damage to many biological systems whereby the high energy quanta at short wavelengths disrupt proteins DNA and RNA This damage manifests itself in sunburn and skin cancer in humans and animals mutations loss of productivity and other destructive effects in plants and micro organisms In each case the damage caused by UVB is dependent both on t...

Page 23: ...absolutely flat spectral response A spectroradiometer is the only instrument capable of measuring a spectral region absolutely since it has a perfect flat spectral response To compare the UV sensors to the spectroradiometer the source being measured must first be scanned using the spectroradiometer to measure the defined UV spectral region The UV sensor is then used to measure the same source at t...

Page 24: ...y Integral units for energy flux are typically mega joules per metre squared MJ m 2 Irradiance The flux of quanta or energy incident on unit surface area PAR Photosynthetically Active Radiation is defined as radiation within the visible band 400 700 nm It can be expressed in terms of the quantum flux or the energy flux Quantum Flux The flux of quanta of PAR radiation is expressed in micromoles per...

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