The CHP1-L, manufactured by Kipp & Zonen and cabled by Campbell Scientific, is a pyrheliometer used for unattended direct solar-radiation measurements. It is designed specifically to measure the direct beam solar irradiance with a field of view limited to 5 degrees. This is achieved by the shape of the collimation tube, precision apertures, and the detector design.Read More
To monitor direct normal irradiance, a CHP1 Pyrheliometer is mounted to a user-supplied sun tracker such as Kipp & Zonen's Solys2. The CHP1 pyrheliometer measures the direct-beam solar irradiance with a field of view limited to 5 degrees. The limited field of view requires the CHP1 to be continuously pointed toward the sun. The Solys2 Sun Tracker rotates on two axes and uses a GPS receiver to keep the CHP1 aimed at the sun throughout the day.
|Measurement Description||Measures the direct beam solar irradiance with a field of view limited to 5 degrees|
|Spectral Range||200 to 4000 nm|
|Sensitivity||7 to 14 µV/W/m2|
|Response Time||< 5 s|
|Zero Offset B||< 1 W/m2|
|Temperature Dependence of Sensitivity||< 0.5% (-20° to +50°C)|
|Field of View (FOV)||5° ±0.2°|
|Operating Temperature Range||-40° to +80°C|
|Maximum Irradiance||4000 W/m2|
|International Standards||First Class ISO|
|Body Diameter||3.8 cm (1.5 in.)|
|Base Diameter||7.6 cm (3.0 in.)|
|Length||31.6 cm (12.4 in.)|
|Weight||0.9 kg (1.98 lb) excluding cable|
Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
Number of FAQs related to CHP1-L: 12
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Ideally, the window should be cleaned every morning.
A pyrheliometer, such as the CHP1-L, has a window through which sunlight enters. The sunlight, or incident solar short-wave radiation, is directed onto an electronic device called a thermopile. Using the thermoelectric effect, the thermopile acts as a large thermocouple that measures the temperature of a particular body—in this case, the sun. The thermal energy is converted into a voltage output signal that can be recorded by Campbell Scientific data loggers.
Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field in the product’s Ordering information. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.