GE DS3820SMTW Bus expansion card

Thermopile sensors with the LP1 absorber have large variation of absorption at different wavelengths. Therefore a continuous spectral curve is inserted into the sensor, enabling the user to choose the desired wavelength from the range specified in the specification sheet and the correction factor for that wavelength is automatically introduced (This feature is available using the Nova II meter with software v 1.59 and above).

To choose Manual or Automatic Ranging in Power Measurement Autorange 

The Nova II allows you to choose autorange or manual ranging. In autorange mode, you do not have to change scales. When the reading of the meter or bar is more than 100% of full scale, the range goes to the next higher one. The ranges are arranged in factors of 1, 10, 100, etc. When the reading falls below 9% of full scale, the range changes to one range lower. This change only occurs after a few seconds delay. This provides overlap (hysteresis) to keep the Nova II from flipping back and forth when reading close to the end of the scale.

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