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CHP1-L 太阳直射仪
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概览

CHP1-L 作为一款太阳直射仪用于无人值守的太阳直接辐射测量。其特殊的设计保证了测量5°视野内的太阳直接辐射。这一功能通过瞄准管，精密孔，检测器三者实现。

优势与特点

  • ISO First Class
  • Built-in temperature sensors

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技术说明

为监测正常的直接辐射，CHP1直射仪需安装在太阳追踪器上例如Kipp & Zonen的Solys2。CHP1太阳直射仪测量5°视野内的太阳直接辐射。这要求CHP1一直指向太阳。Solys2太阳追踪器以双坐标抽进行旋转，并使用GPS接收器来保证CHP1全天对准太阳。

产品规格

Sensor Pyrheliometer
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
Non-Linearity < 0.2%
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

兼容性

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

数据采集器

Product Compatible Note
CR3000 (retired)
CR800 (retired)
CR850 (retired)

常见问题解答

CHP1-L: 9

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  1. Is a two-axis tracker needed for the CHP1-L?
    Absolutely. Because the CHP1-L measures the direct beam solar irradiance, it must follow the sun and remain within the limits of the 5 degree field of view to provide accurate measurements.
  2. How does the CHP1-L work?

    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.

  3. What type of tracker can be used with the CHP1-L?
    The CHP1-L is typically mounted to a user-supplied sun tracker, such as Kipp & Zonen’s Solys2 or EKO Instruments’ STR-21G/22G.
  4. How often should the CHP1-L be calibrated?
    Every two years.
  5. Does the CHP1-L require a power supply?
    No.
  6. Can the output signal from a CHP1-L be negative?
    Yes, but only under certain conditions. The most common condition for a negative output signal occurs during nighttime measurements when the temperature of space is less than the sensor’s temperature.
  7. How often should the CHP1-L window be cleaned?

    Ideally, the window should be cleaned every morning.

  8. What type of sensor is the CHP1-L, and what does it measure?
    The CHP1-L is a pyrheliometer, manufactured by Kipp & Zonen, that measures the direct beam irradiance from the sun within a 5 degree solid angle around the sun.
  9. Does the CHP1-L have an internal temperature sensor?
    Yes. The internal temperature can be measured using either the PT100 or thermistor built into the sensor.
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