Invalid Measurement Error

Getting an Invalid Measurement Error when taking a measurement or calibrating a 500 series instrument.

This can be caused by a few issues. Here are some basic troubleshooting steps to help.

  1. Checking the lamps. This can be done by holding the unit 2 to 3 inches above a flat surface, then closing the shoe, causing the unit to measure. You should see light being emmited from 3 three lamps. if you only see one or two, the unit will need service.

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