The LIR, manufactured by LI-COR, is a silicon pyranometer that accurately Calibrated against an Eppley precision spectral pyranometer (PSP) for the. CR23X, or CR7 datalogger to an EPPLEY Precision Spectral Pyranometer (PSP). The. PSP is a high quality pyranometer used for extremely accurate solar. Eppley PSP The Eppley Precision Spectral Pyranometer (PSP) is a World Meteorological Organization First Class Radiometer, designed for the measurement of.

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In Marchthe heating system was equipped with a Vessmann Vitosolic regulator, which provides a much more effective control than the old Vitosolic regulator.

There are two principles to keep in mind in order to understand the operation of the tank: Because of the thermopile characteristics the instruments could be small, light, low cost, have a continuous voltage output signal, elpley not require any external electrical power or pyranometre systems. This exchanger transfers the heat transported by the pressured gas to a second fluid which is glycolated water and which serves to convey the heat from the collector into the tank through the coil located in the lower half of the reservoir and a pump.

The amplifier, shown here without its lid, includes a zero offset LTC operational amplifier followed by a LT operational amplifier. Overview The LIR, manufactured by LI-COR, is a silicon pyranometer that accurately monitors sun plus sky radiation for solar, agricultural, meteorological, and hydrological applications.


In winter, the solar collector “preheats” the water which is then heated by the central heating in the pgranometer half of the reservoir. A laptop is connected to the datalogger to retreive the recorded data. This solution was later abandoned because the datalogger crashed periodically for a reason that could not be determined even with eplley help of RESOL. Currently only one measurement is taken per minute.

Irradiance measurement using the pyranometer: Since November 14,we have put the PCI E card back into operation, but this time we have set up our own temperature sensors Pt RTD sensors next to those installed by Viessmann. The collector consists of 30 glass vacuum tubes, each containing a black metal plate which absorbs solar radiation.

They provide a total isolation of both the logic signal and the 5 volt supply.

Chaleur produite par le capteur solaire (heure par heure)

The control and data acquisition of our solar energy system evolved over time. To build an fppley data acquisition system resquired to protect it from electrical interference and lightnings due to the fact that some sensors are placed on a roof outside the house.

The following shows notable compatibility information. Another possibility is to compare several identical pyranometers. The temperature in the collector red dot rises in an uncontrolled way.

Black & White Pyranometer

It measures, therefore, exactly the energy received by the thermal panel and photovoltaic panel. Generally, pyranometers are installed horizontally. Images LIR-L with cable.

They then measure global irradiance, that is to say one that comes from all sources in the hemisphere located above the surface: However, it was not until a meteorological conference at Utrecht in that Dr. Oval vortex flowmeter Eggs Delta-Pulsegenerating 4 pulses for one litre, filtering of pulses with a as Schmitt trigger, 4N32 optocoupler, 1-wire DS integrated circuit as pulse counter directly connected to Tini.


All measurements are recorded at 1 minutes intervals and the measurements are send every hour by FTP to the eausolaire. It is not a comprehensive list of pyganometer compatible or incompatible products.

The Apogee pyranometer and the Eppley pyranometer not shown in the picture produced measurements which were different from the three Eppley PSP, which shows that pyranometer can be affected by drift.

One advantage of TINI is that it allows direct use of a range of 1-wire sensors and devices, another interesting line of products created by the same team of engineers at Dallas. The passive cold junctions of the thermopile are in thermal contact with the pyranometer housing, which serves as a heat-sink. More recent, higher performance, pyranometers use a Peltier element.

The detector outputs current; a shunt resistor in the sensor cable converts the signal from current to voltage, allowing the LIR to be measured directly by Campbell Scientific data loggers. We have designed and built our own electronic circuitry needed to use the temperature sensors.

Global Precision Pyranometer

The unit has a black surface which heats up by absorbing the incident light radiation. Systronics does the same with TStik. We have taken the option to acquire several Eppley PSP pyranometers and to compare them.