Light meters & dATA LOGGER
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Digital Light meter Data logger with RS-232 features
Model: DLM-536
Digital UVA Light meter
Model: UVA-830
TR-74Ui Illuminance UV Recorder" is a data logger designed to simultaneously measure and record four items: Illuminance, Ultraviolet Light (UV), Temperature and Humidity.
How to calibrate a light meter?
To calibrate a light meter, I would recommend you borrow or rent a meter that is calibrated
and then measure with both meters at same time, location and orientation.
This will give you immeidate and accurate results, if you meter needs to be sent back factory for recalibration or further service.