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Related Manuals for GHM Delta OHM PYRAsense LPS10 Series
Summary of Contents for GHM Delta OHM PYRAsense LPS10 Series
- Page 1 English Operating manual Pyranometers PYRAsense LPS10 series www.deltaohm.com Keep for future reference.
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Page 2: Table Of Contents
TABLE OF CONTENTS INTRODUCTION ....................3 TECHNICAL SPECIFICATIONS ................4 WORKING PRINCIPLE ................... 6 INSTALLATION ..................... 7 ................8 PTIONAL MOUNTING SUPPORTS ..................9 LECTRICAL CONNECTIONS CONFIGURATION ....................11 ASCII PROPRIETARY PROTOCOL ................ 12 MODBUS-RTU PROTOCOL ..................16 MEASUREMENT WITH ANALOG OUTPUT (ONLY LPS03MA…) ....... 18 USE OF THE DIAGNOSTIC SENSORS .............. -
Page 3: Introduction
INTRODUCTION PYRAsense series pyranometers measure the global irradiance on a flat surface (W/m ), sum of direct solar irradiance and diffuse irradiance. The PYRAsense LPS10 series falls within the Spectrally Flat Class A pyranometers according to the ISO 9060:2018 standard and meets the requirements of the WMO “Guide to Instruments and Methods of Observation”. -
Page 4: Technical Specifications
TECHNICAL SPECIFICATIONS Sensor Thermopile Measuring range -200…4000 W/m The irradiance range for the analog output is configurable (default 0…2000 W/m Resolution 0.1 W/m Viewing angle 2π sr Spectral range (50%) 283…2800 nm Output RS485 Modbus-RTU (isolated) Optional additional analog output configurable 4…20 mA (default), 0…20 mA, 0…1 V, 0…5 V or 0…10 V 7…30 Vdc for RS485 output Power supply... - Page 5 Technical Specifications According to ISO 9060:2018 Classification Spectrally Flat Class A Response time (95%) < 2 s Zero offset a) response to a 200 W/m thermal <±7W/m radiation b) response to a 5 K/h change in <±2W/m ambient temperature c) total zero offset including the effects <±10W/m a), b) and other sources Long-term instability (1 year)
- Page 6 3 MEASURING PRINCIPLE PYRAsense series pyranometers are based on a thermopile sensor. The thermopile sensitive surface is coated with a black matt paint, which allows the pyranometer not to be selective 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).
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Page 7: Installation
4 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 8: Optional Mounting Supports
4.1 O PTIONAL MOUNTING SUPPORTS Fig. 4.3: LPS1 bracket for mast LPS10 V1.0... -
Page 9: Electrical Connections
4.2 E LECTRICAL CONNECTIONS 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. Only if it is not possible to ground locally the metallic case of the pyranometer, connect the wire of the cable corresponding to the housing to ground. - Page 10 Connections: Other sensors with RS485 output PLC, data logger or RS485/USB or RS485/RS232 converter for PC Power supply Fig. 4.6: electrical connections RS485 output: The RS485 output is isolated. Before connecting the pyranometer to the RS485 network, set the address and the communication parameters, if different from the factory preset (see “Configuration”...
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Page 11: Configuration
5 CONFIGURATION It is possible to change the serial communication parameters (Modbus address, Baud Rate, parity/stop bit) and, for models with analog output, the type of analog output and the global irradiance measuring range corresponding to the analog output. The configuration of the pyranometer can be done: •... -
Page 12: Ascii Proprietary Protocol
6 ASCII PROPRIETARY PROTOCOL To communicate with the pyranometer via the ASCII proprietary protocol: 1. Connect the pyranometer to the PC and start a standard serial communication program. 2. In the serial communication program, set the Baud Rate 57600, the parameters 8N2 and the COM port number to which the pyranometer is connected. - Page 13 RS485 Modbus-RTU communication parameters: Command Reply Description CMAn CMA;&| Sets the Modbus-RTU address (1…247) to n. Default=1 RMA;n| Reads the Modbus-RTU address. CMBn CMB;&| Sets the Baud Rate: 9600 if n=0 19200 if n=1 (default) 38400 if n=2 ...
- Page 14 Units of measurement: Changing the temperature units of measurement affects the Modbus protocol only. The temperature measurement provided by the ASCII proprietary protocol (commands S0/S1) is always in °C. Command Reply Description WUT;&| Sets the temperature unit of measurement: °C if n=0 (default) ...
- Page 15 Command Reply Description WAL5n…n WAL5;&| Sets to n…n hPa the internal pressure alarm threshold (800…1100 hPa, default=1100 hPa). AL5;n…n| Reads the internal pressure alarm threshold. All alarm thresholds are integer values with resolution 1 (1 day, 1 °C/°F/K, 1 %RH, 1 hPa).
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Page 16: Modbus-Rtu Protocol
7 MODBUS-RTU PROTOCOL By default, the pyranometer has Modbus address 1 and communication parameters 19200, 8E1. The address and the communication parameters can be changed by using the appropriate serial commands of the proprietary protocol or, alternatively, directly with Modbus commands by changing the value of the Holding Registers described lat- The Modbus-RTU protocol is active after a few seconds from the sensor power on. - Page 17 Address Description Format Sensitivity of historical calibration 5 in µV/Wm (x1000) 32-bit Integer 82…85 Date of historical calibration 5 (yyyymmdd) String OPERATING TIME Operating time in days from first power on 16-bit Integer Operating time in days from last power on 16-bit Integer Notes on the registers format: 1) To read a 32-bit integer value, two consecutive registers starting from the one in-...
- Page 18 Holding Registers: Address Description Format RS485 Modbus-RTU Baud Rate: 16-bit Integer 0=9600 1=19200 (default) 2=38400 3=57600 4=115200 RS485 Modbus-RTU parity and stop bits: 16-bit Integer 0=8N1 1=8N2 2=8E1 (default) 3=8E2 4=8O1 5=8O2 Modbus-RTU address (1…247, default=1). 16-bit Integer Temperature unit of measurement: 16-bit Integer 0=°C (default) 1=°F...
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Page 19: Measurement With Analog Output (Only Lps03Ma
8 MEASUREMENT WITH ANALOG OUTPUT (only LPS10MA…) Calculation of the global irradiance E (W/m ) as a function of the analog output value (in V) or I (mA). Analog output Global irradiance ) • I 0…20 mA + [(E – E /20] ) •... -
Page 20: Use Of The Diagnostic Sensors
9 USE OF THE DIAGNOSTIC SENSORS The internal temperature, relative humidity, pressure and tilt (only LPS10MxT) diag- nostic sensors allow keeping the pyranometer operating conditions under control all the time and foresee any maintenance intervention in advance, thus ensuring always reliable measurements. -
Page 21: Maintenance
10 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: Safety Instructions
11 SAFETY INSTRUCTIONS General safety instructions The pyranometer 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 23: Accessories Ordering Codes
12 ACCESSORIES ORDERING CODES The pyranometer is supplied with solar radiation protection screen, M12 female free connector (only if the optional cable is not ordered), calibration report and PC application software downloadable from Delta OHM website. Cables and fixing accessories must be ordered separately. Fixing accessories Fixing bracket for Ø... - Page 24 OTES LPS10 V1.0...
- Page 25 OTES LPS10 V1.0...
- Page 26 OTES LPS10 V1.0...
- 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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