Related Manuals for Delta OHM LPPYRHE16
Summary of Contents for Delta OHM LPPYRHE16
- Page 1 English Operating manual Pyranometer LPPYRHE16 www.deltaohm.com Keep for future reference.
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Page 2: Table Of Contents
LPPYRHE16S ................10 CONNECTIONS LPPYRHE16ACS ................11 CONNECTIONS MEASUREMENT IN THE MODELS WITH ANALOG OUTPUT ........12 LPPYRHE16 ....................12 LPPYRHE16AC[S] ................... 12 LPPYRHE16AV ....................12 RS485 MODBUS-RTU OUTPUT ................13 ............... 13 ETTING THE COMMUNICATION PARAMETERS -RTU .......... 15... -
Page 3: Introduction
The receiving surface must be positioned perpendicularly to sun’s rays, via a solar tracker or else. LPPYRHE16 is a B class pyrheliometer in accordance with ISO 9060:2018 standard and with the criteria of the WMO “Guide to Meteorological Instruments and Methods of Observation’”, seventh edition (2008). -
Page 4: Working Principle
20 °C in the temperature range from -20 to 50 °C LPPYRHE16 is a sealed instrument, for that reason a cartridge of silica-gel crystals is provided to absorb humidity inside the instrument, in order to prevent condensation from forming on the quartz window of the instrument, invalidating the performed measurements. - Page 5 Fig. 2.2: field of view and slope angle A light shield can be insert, in order to reduce light scattering contribution. Housing Thermopile Temperature compensation Surge Protector To cable shield Connector pins Fig. 2.3: scheme of principle LPPYRHE16 (version with mV output) LPPYRHE16 V2.3...
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Page 6: Installation
8. The pyrheliometer is ready for use. The figure below shows the operations necessary to fill the cartridge with the silica gel crystals. Silica-gel Sealed sachet cartridge of silica-gel crystals Perforated cap Filling Closing the cartridge Fig. 3.1: filling the silica-gel cartridge LPPYRHE16 V2.3... - Page 7 (on the front flange of the pyrheliometer) reach the second hole (on the back flange). Alignment holes Silica-gel cartridge • Fig. 3.2: description and dimensions in mm LPPYRHE16 V2.3...
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Page 8: Electrical Connections
4.1 LPPYRHE16 CONNECTIONS The pyrheliometer LPPYRHE16 is passive and does not require power supply. It is to be connected either to a millivoltmeter or to a data acquisition system. Typically, the pyranometer output signal does not exceed 20 mV. In order to better exploit the pyr- heliometer features, the readout instrument should have 1 µV resolution. -
Page 9: Lppyrhe16Ac Connections
Connector Function Color Output positive (+Vout) Output negative Blue Power supply negative (GND) Power supply positive (+Vdc) White Cable shield (SH) Black Instrument with voltage input Sensor M12 male connector CPM12AA4… cable Power supply Fig. 4.3: LPPYRHE16AV connections LPPYRHE16 V2.3... -
Page 10: Lppyrhe16S Connections
Connect to ground only if it is not possible to ground locally the housing of the pyrheliometer Fig. 4.4: LPPYRHE16S connections Before connecting the pyrheliometer to the RS485 network, set the address and the communication parameters, if different from the factory preset (see chapter 6). LPPYRHE16 V2.3... -
Page 11: Lppyrhe16Acs Connections
Connect to ground only if it is not possible to ground locally the housing of the pyrheliometer Fig. 4.6: LPPYRHE16ACS connections Before connecting the pyrheliometer to the RS485 network, set the address and the communication parameters, if different from the factory preset (see chapter 6). LPPYRHE16 V2.3... -
Page 12: Measurement In The Models With Analog Output
5 MEASUREMENT IN THE MODELS WITH ANALOG OUTPUT Below are the ways to calculate the direct irradiance in the models with analog output LPPYRHE16, LPPYRHE16AC[S] and LPPYRHE16AV. 5.1 LPPYRHE16 Each pyrheliometer is distinguished by its own sensitivity (or calibration factor) S ex- pressed in µV/(Wm... -
Page 13: Rs485 Modbus-Rtu Output
Parity: None Stop Bits: 2 In the program, set the COM port number to which the pyrheliometer will be con- nected. 3. Switch the pyrheliometer on (if the CP24 cable is used, connect both ends of the cable). LPPYRHE16 V2.3... - Page 14 0 ⇒ Violate protocol and go in Rx mode right after Tx 1 ⇒ Respect protocol and wait 3.5 characters after Tx Note: it is not required to send the CAL USER ON command to read the settings. LPPYRHE16 V2.3...
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Page 15: Reading The Measures With The Modbus -Rtu Protocol
PERATING MODE onds from power on. In the first 10 seconds from power on the pyrheliometer does not reply to requests from the MODBUS master unit. After 10 seconds, it is possible to send MODBUS requests to the pyrheliometer. LPPYRHE16 V2.3... -
Page 16: Technical Specifications
Analog in µV/Wm- (LP PYRHE16) Analog 4÷20 mA (LPPYRHE16AC[S]) Analog 0÷1 V, 0÷5 V or 0÷10 V (LPPYRHE16AV) Digital RS485 Modbus-RTU (LPPYRHE16[AC]S) Power supply 10÷30 Vdc (4÷20 mA, 0÷1 V and 0÷5 V outputs) 15÷30 Vdc (0÷10 V output) 5÷30 Vdc (RS485 Modbus-RTU output) -
Page 17: Maintenance
• User obligations The instrument operator shall follow the directives and regulations below that refer to the treatment of dangerous materials: EEC directives on workplace safety. • National law regulations on workplace safety. • Accident prevention regulations. • LPPYRHE16 V2.3... -
Page 18: Accessories Ordering Codes
Spare part. Pack of 5 sachets of silica-gel crystals. DELTA OHM metrology laboratories LAT N° 124 are ISO/IEC 17025 accredited by ACCREDIA for Temperature, Humidity, Pressure, Photometry / Radiometry, Acous- tics and Air Velocity. They can supply calibration certificates for the accredited quantities. - Page 20 | 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. 206. Each instrument is sold after rigorous inspections; if any manufacturing defect is found, it is necessary to contact the distributor where the instrument was purchased from.
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