If a LP02-L is reporting 0 W/m2, NANs, or unrealistic values, should it be recalibrated?

Perhaps, but it is more likely that there is a wiring or programming issue. If the pyranometer is reading 0 W/m2, separate it from the data logger and measure the resistance across the sensor leads. If the reading is approximately 0 ohms, the sensor has likely been damaged and will need to be repaired or replaced. For information about the process of returning equipment to Campbell Scientific, refer to the Repair and Calibration page.

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