AMF03
Albedometer mounting fixture
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- with mounting fixture
- with glare screen
- easy mounting and leveling
Albedometer mounting fixture
Combine two pyranometers into one albedometer
Hukx offers a practical range of mounting and leveling fixtures to construct albedometers from its popular pyranometers and make installation and leveling easy. Albedometers are increasingly popular in bifacial PV module monitoring. AMF03 allows you to combine pyranometers with housings like those of models SR30-M2-D1 and SR300-D1 into one albedometer. The modular design facilitates maintenance and calibration of the pyranometers. The albedometer kit includes a mounting fixture and a glare screen.
- with mounting fixture
- with glare screen
- easy mounting and leveling
Specifications
| instrument compatibility | 2 x SR300, SR200, SR100, SR30, SR15 |
| included in AMF03 | (1 x) glare screen, (1 x) AMF03 fixture with rod, (1 x) conical positioner, (2 x) M5x12 socket head cap screw, (1 x) M6x8 socket head cap screw, (2 x) M8x12 set screw, (1 x) mounting instruction sheet |
| rod diameter | 15 x 10⁻³ m |
| may be combined with | ALF01, CMF01 (with 1 inch pipe) |
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Constructing albedometers yourself
With the AMF03 mounting fixture, you may construct albedometers from popular Hukx pyranometers yourself. AMF03 albedometers can be leveled with the ALF01 leveling fixture.
Albedo and albedometers
Albedo, also called solar reflectance, is defined as the ratio of the reflected to the global radiation. It is a dimensionless number smaller than 1. It is a property of the ground surface.
An albedometer is an instrument that measures both global and reflected solar radiation and, by calculation, the solar albedo, or solar reflectance for a particular ground surface. An albedometer is composed of two pyranometers, both installed horizontally, the downfacing one measuring reflected solar radiation.
In the open field, the solar albedo depends on the directional distribution of incoming radiation and on surface properties at ground level. It is usually expressed as a single number, determined by taking an average over a day with solar elevation > 10 °. Changes of albedo are typically slow and seasonal, except when it snows. Albedos of typical surfaces range from about 4 % for fresh asphalt and 15 % for green grass to 90 % for fresh snow.
Albedometers are increasingly popular in bifacial PV module performance monitoring.
You may use one AMF03 albedometer kit and two pyranometers with housings similar to those of models SR30-M2-D1 and SR300-D1 to construct an albedometer.
Depending on the pyranometer used, the albedometer will either be Class A, the highest accuracy class, or the lower accuracy Class B. The modular design facilitates the maintenance and calibration of the pyranometers. By taking the instrument apart you can use normal indoor calibration facilities for instrument calibration. The Class A models SR300-D1, SR200-D1 and SR30-M2-D1 and Class B models SR100-D1 and SR15 are supplied with several outputs; analog millivolts, 4–20 mA current loop and Modbus over RS-485 are the most used.
Glare screen
AMF03 is supplied with a glare screen. A glare screen is a metal ring, mounted on the downfacing sensor. At solar elevations of < 5 °, when the sun is just above the horizon, the glare screen prevents that direct solar radiation is measured by the downfacing sensor. This is important because it would otherwise lead to unrealistic albedo measurements. Modern data quality assurance can also attain the data quality by calculating solar elevation and rejecting any data at solar elevations below a certain value, for example < 10 °. You may decide to mount the glare screen after transport and on-site installation, so that the dome protector can remain on the dome until the albedometer is firmly installed.
AMF03
AMF03 is easy to use. It allows you to combine two separate pyranometers, creating an albedometer. All you need are two mechanically compatible pyranometers and the AMF03 kit. Mounting instructions and a set of hex keys are delivered with AMF03.
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