Error Type: Nadir candela values are not equal. Nadir candela values must be equal, they all measure the same spot in the photometric web. In type B photometric files, the -90 and 90 degree vertical candela values must be equal.
Remedy: Replace nadir candela values with a calibrated average value or obtain a valid photometric file from the manufacturer.
Automatic Repair suggests averaging values and provides the average candela figure. You may specify an alternate nadir value - all individual values are shown.
Standard deviation is used to determine whether error is caused by rounding or if there are inconsistencies in file.