The Kendall MK I Control Unit combined with a Kendall MK IV, MK VI, or MK XI Radiometer forms a complete measuring system ideally suited for use in a wide variety of applications requiring the accurate measurement of irradiance.  The Control Unit displays continuously the digital value of the irradiance in any desired absolute units, usually kW/m2.  It is complete within itself (except for radiometer temperature control equipment for the MK V radiometers) and contains all necessary maintenance self-check and calibration equipment. State of the art components used include a low noise, ultra-low drift amplifier system, and a high accuracy, high resolution digital voltmeter.  Both analog and RS-232 digital outputs of measured irradiance are provided for incorporation into a data acquisition system.  The control unit and Kendall radiometer form a complete measuring system of the highest accuracy which is particularly convenient and represents continued excellence in the art of radiometry. 

Specifications 

Accuracy: Absolute measurement uncertainty is less than ± 0.5% of the Kendall radiometer full scale range. 

Zero Drift: < ±0.1%/ month of Kendall radiometer full scale range. 

Time Constant: <2 seconds (l/e) 

Display: ± 99,999 counts normal range. 

Analog Outputs: ± 4 volts 

Digital Outputs: RS-232 

Size: 43 cm wide, 14 cm high, 46 cm deep. 

Weight: 10 kg (approx.)