An individual can aquire only 2 online credits during a 5 year certification cycle. Failed attempts count.
Example: If you take the Calibration exam and fail you have only one more chance to aquire an online credit during the 5 year certification cycle.

Each exam is worth one credit only.

You can miss no more than three (3) questions on each exam to pass.

If you pass an exam a $10, one (1) credit processing fee along with a print out of the passed exam must be sent to: