The T-10 illuminance meter is cosine corrected and measures illuminance in lx or fcd, illuminance difference, illuminance ratio based on a reference light source, integrated illuminance, integration time, and average illuminance. The measurement range is 0.01 to 299,990 lx (0.001 to 29,990 fcd) and the linearity is ± 2 % ± 1 digit of displayed value.
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View user’s manual: here