Related Manuals for GHM Delta OHM LPPYRA03
Summary of Contents for GHM Delta OHM LPPYRA03
- Page 1 English Operating manual Pyranometer LPPYRA03 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 LPPYRA03 ..................8 CONNECTIONS LPPYRA03AC .................. 9 CONNECTIONS LPPYRA03AV .................. 9 CONNECTIONS LPPYRA03S .................. 10 CONNECTIONS LPPYRA03S12 ................11 CONNECTIONS LPPYRA03ACS ................12 CONNECTIONS MEASUREMENT IN THE MODELS WITH ANALOG OUTPUT ........ -
Page 3: Introduction
INTRODUCTION LPPYRA03 pyranometer measures the irradiance on a flat surface (W/m ). The meas- ured irradiance (Global Irradiance) is the sum of direct solar irradiance and diffuse ir- radiance. LPPYRA03 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 Instruments and Methods of Observation’”. -
Page 4: Working Principle
2 WORKING PRINCIPLE LPPYRA03 pyranometer is based on a thermopile sensor. The thermopile sensitive sur- face is coated with a black matt paint, which allows the pyranometer not to be selec- tive at different wavelengths. The pyranometer spectral range is determined by the transmission of the glass dome type K5. -
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 LPSP2 LPPYRA03AC LPPYRA03 500 mm LPPYRA03AV LPPYRA03[AC]S LPS2 LPPYRA03S12 LPS2 LPPYRA03 LPPYRA03AC LPPYRA03AV HD2003.77/40 LPPYRA03[AC]S LPPYRA03S12 HD2003.77/40 40 mm HD9007 LPPYRA03 80° MAX TP32MTT.03.C HD9007T29.1 int. M37 x 2 Fig. 3.2: fixing accessories LPPYRA03 V2.8...
- Page 7 Fig. 3.3: fixing accessories LPPYRA03 V2.8...
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Page 8: Electrical Connections
4 ELECTRICAL CONNECTIONS LPPYRA03, LPPYRA03AC and LPPYRA03AV have a 4-pole connector and use the CPM12AA4... optional cables, with 4-pole connector on one side and open wires on the other side. LPPYRA03S and LPPYRA03S12 have a 8-pole connector and use the CPM12-8D... optional cables, with 8-pole connector on one side and open wires on the other side. -
Page 9: Lppyra03Ac
4.2 LPPYRA03AC CONNECTIONS The pyranometer LPPYRA03AC has 4…20 mA output and requires 10…30 Vdc exter- nal 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 ≤... -
Page 10: Lppyra03S
4.4 LPPYRA03S CONNECTIONS The pyranometer LPPYRA03S has RS485 Modbus-RTU output and requires 5…30 Vdc external power supply. It is to be connected to a power supply and to a PLC, a data logger or a RS485/USB or RS485/RS232 converter for PC as shown in fig. 4.4. -
Page 11: Lppyra03S12
4.5 LPPYRA03S12 CONNECTIONS The pyranometer LPPYRA03S12 has SDI-12 output and requires 7…30 Vdc external power supply. It is to be connected to a power supply and to an acquisition system (data logger) as shown in fig. 4.5. Connector Function Cable color Power supply negative (GND) Blue SDI-12 output negative... -
Page 12: Lppyra03Acs
4.6 LPPYRA03ACS CONNECTIONS The pyranometer LPPYRA03ACS has two outputs: • One 4…20 mA output, requiring 10…30 Vdc external power supply. It is to be connected to a power supply and an instrument with 4…20 mA input as shown in fig. 4.6. The load resistance of the instrument reading the signal must be ≤ 500 Ω. •... -
Page 13: Measurement In The Models With Analog Output
5 MEASUREMENT IN THE MODELS WITH ANALOG OUTPUT Below are the ways to calculate the global irradiance in the models with analog output LPPYRA03, LPPYRA03AC[S] and LPPYRA03AV. 5.1 LPPYRA03 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 calibra- tion report). -
Page 14: Rs485 Modbus-Rtu Output
6 RS485 MODBUS-RTU OUTPUT Before connecting the pyranometer to the RS485 network, an address must be assigned and the communication parameters must be set, if different from the factory preset. 6.1 S ETTING THE COMMUNICATION PARAMETERS Connect the pyranometer to the PC in one of the following two ways: A. - Page 15 4. Within 10 seconds from the pyranometer power on, send the @ command and press Enter. Note: if the pyranometer does not receive the @ command within 10 seconds from power on, the RS485 MODBUS mode is automatically activated. In such a case, it is necessary to switch off and on again the pyranometer.
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Page 16: Rtu Protocol
6.2 R -RTU EADING THE MEASURES WITH THE ODBUS PROTOCOL In MODBUS mode, you can read the values measured by the pyranometer through the function code 04h (Read Input Registers). The following table lists the quantities available with the appropriate register address: Number Address Quantity... -
Page 17: Sdi-12 Output
7 SDI-12 OUTPUT The LPPYRA03S12 pyranometers are compatible with version 1.3 of SDI-12 protocol. The protocol communication parameters are: Baud rate = 1200. Data bits = 7, Parity = Even, Stop bits = 1. The communication with the instrument is performed by sending a command in the following form: <Address><Command>! with <Address>... - Page 18 Command Instrument reply Description a<CR><LF> Request of the address of the instrument. If mo re than one sensor is connected to the bus, a conflict occurs. START MEASUREMENT AND TYPE START CONCURRENT MEASUREMENT COMMANDS Irradiance, signal internal level and internal temperature atttn<CR><LF>...
- Page 19 Command Instrument reply Description Internal temperature atttn<CR><LF> Request to execute the aM2! measurement. aC2! with: ttt = number of seconds necessary for the in- strument to make the measure available (3 characters) n = number of detected variables (1 character for aM2!, 2 characters for aC2!) Note: ttt = 000 means datum immediately available.
- Page 20 1) Send the command aXSCAL USER ON! (note: a=instrument address). 2) Send the command aXSCFD! (to set °C) or aXSCFE! (to set °F). 3) Send the command aXSCAL END! For more information about the SDI-12 protocol, visit the website "www.sdi-12.org". LPPYRA03 V2.8...
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Page 21: Maintenance
8 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 22: Technical Specifications
TECHNICAL SPECIFICATIONS Thermopile Sensor Typical sensitivity 5÷15 µV/Wm 33÷45 Ω Impedance Measuring range 0÷2000 W/m 2π sr Viewing angle Spectral range (50%) 300÷2800 nm -40÷80 °C / 0÷100% Operating temperature/humidity Output Analog in µV/Wm (LPPYRA03) Analog 4÷20 mA (LPPYRA03AC[S]) Analog 0÷1 V, 0÷5 V or 0÷10 V (LPPYRA03AV) Digital RS485 Modbus-RTU (LPPYRA03[AC]S) Digital SDI-12 (LPPYRA03S12) Power supply... -
Page 23: Safety Instructions
10 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 24: Ordering Codes
11 ACCESSORIES ORDERING CODES Shade disk. LPSP2 Kit including a fixing base for the pyranometer and a ∅ 16 x LPS2 500 mm rod. Fixing bracket for the pyranometer, suitable for ∅ 40 ÷ 50 mm LPS3 mast. Installation on horizontal or vertical mast. LPRING04 Adjustable holder for mounting the pyranometer in an inclined position on Ø... - Page 25 OTES LPPYRA03 V2.8...
- Page 26 OTES LPPYRA03 V2.8...
- Page 28 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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