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Summary of Contents for GHM DeltaOHM LPPYRA-Lite
- Page 1 English Operating manual Pyranometer LPPYRA-Lite www.deltaohm.com Keep for future reference.
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Page 2: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ....................3 WORKING PRINCIPLE ................... 4 INSTALLATION ..................... 5 ELECTRICAL CONNECTIONS .................. 8 LPPYRA-L .................. 8 ITE CONNECTIONS LPPYRA-L ................9 CONNECTIONS MEASUREMENT ....................10 LPPYRA-L ....................10 LPPYRA-L AC ....................10 MAINTENANCE ....................11 TECHNICAL SPECIFICATIONS ................12 SAFETY INSTRUCTIONS .................. -
Page 3: Introduction
INTRODUCTION LPPYRA-Lite pyranometer measures the irradiance on a flat surface (W/m ). The measured irradiance (Global Irradiance) is the sum of direct solar irradiance and dif- fuse irradiance. LPPYRA-Lite is a Spectrally Flat Class C (Second Class) pyranometer in accordance with ISO 9060:2018 and with the criteria of the WMO “Guide to Meteorological In- struments and Methods of Observation’”. -
Page 4: Working Principle
2 WORKING PRINCIPLE LPPYRA-Lite pyranometer is based on a thermopile sensor. The thermopile sensitive surface is coated with a black matt paint, which allows the pyranometer not to be se- lective at different wavelengths. Radiant energy is absorbed by the thermopile black surface, thus creating a difference of temperature between the center of the thermopile (hot junction) and the pyranom- eter body (cold junction). -
Page 5: Installation
3 INSTALLATION • The pyranometer must be mounted in an easy-to-reach location in order to clean the dome regularly and carry out maintenance. At the same time, make sure that no buildings, constructions, trees or obstructions exceed the horizontal plane where the pyranometer lies. - Page 6 Levelling device LPS40/32 LPS40/32BL - Integrated levelling device Fig. 3.2: fixing adapters from 40 to 32 mm holes centre distance Fig. 3.3: fixing on HD2003.77/40 clamping Fig. 3.4: fixing on LPS3 bracket LPPYRA-Lite V1.1...
- Page 7 Fig. 3.3: fixing on LPRING04 adjustable holder LPPYRA-Lite V1.1...
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Page 8: Electrical Connections
4 ELECTRICAL CONNECTIONS LPPYRA-Lite has a 4-pole connector and uses the CPM12AA4... optional cables, with 4-pole connector on one side and open wires on the other side. The metallic housing of the pyranometer should preferably be grounded ( ) locally. In this case, do not connect the wire of the cable corresponding to the housing to prevent ground loops. - Page 9 4.2 LPPYRA-LiteAC CONNECTIONS The pyranometer LPPYRA-LiteAC has 4…20 mA output and requires 10…28 Vdc ex- ternal power supply. It is to be connected to a power supply and an instrument with 4…20 mA input as shown in fig. 4.2. The load resistance of the instrument reading the signal must be ≤...
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Page 10: Lppyra-Lite Ac Connections
5 MEASUREMENT Below are the ways to calculate the global irradiance. 5.1 LPPYRA-Lite Each pyranometer is distinguished by its own sensitivity (or calibration factor) S ex- pressed in µV/(Wm ) and shown in the label on the pyranometer (and in the optional calibration report). -
Page 11: Maintenance
6 MAINTENANCE In order to grant measurements high accuracy, it is important to keep the outer glass dome clean. Consequently, the more the dome will be kept clean, the more measure- ments will be accurate. You can wash it using water and standard papers for lens. If necessary, use pure ETHYL alcohol. -
Page 12: Technical Specifications
TECHNICAL SPECIFICATIONS Sensor Thermopile Typical sensitivity 5÷15 µV/Wm or normalized 7 µV/Wm Measuring range 0÷2000 W/m Viewing angle 2π sr Spectral range (50%) 300÷2800 nm Output LPPYRA-Lite: µV/Wm (impedance 33...45 Ω) LPPYRA-LiteAC: 2-wire (current loop) 4…20 mA ≤ 500 Ω) Power supply LPPYRA-Lite: passive version, no power required LPPYRA-LiteAC: 10…28 Vdc... -
Page 13: Safety Instructions
SAFETY INSTRUCTIONS General safety instructions The instrument has been manufactured and tested in accordance with the safety standard EN61010-1:2010 “Safety requirements for electrical equipment for meas- urement, control and laboratory use” and has left the factory in perfect safety tech- nical conditions. -
Page 14: Accessories Ordering Codes
ACCESSORIES ORDERING CODES LPS40/32 Fixing adapter from 40 to 32 mm holes centre distance. LPS40/32BL Fixing adapter from 40 to 32 mm holes centre distance. With in- tegrated levelling device. Accuracy of levelling device < 0.2°. LPS3 Fixing bracket for the pyranometer, suitable for ∅ 40 ÷ 50 mm mast. - Page 16 GHM GROUP – Delta OHM | Delta Ohm S.r.l. a socio unico Via Marconi 5 | 35030 Caselle di Selvazzano | Padova | ITALY Phone +39 049 8977150 | Fax +39 049 635596 www.deltaohm.com | sales@deltaohm.com WARRANTY Delta OHM is required to respond to the "factory warranty" only in those cases provided by Legislative Decree 6 September 2005 - n.
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