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# What is the Exposure Assistant?

The Exposure Assistant works for In-Motion and Hand Presentation type applications.

For In-Motion type applications, you can select Field of View Size, Lens/Distance to Code, and Code Element Size.

Select Field of View Size to calculate the recommended maximum exposure time by measuring the physical field of view and giving the maximum line speed.

Select Lens / Distance to Code if you want to give the distance of the code from the lens. In case your reader is not equipped with a liquid lens, give the focal length from the drop-down list, and select the direction in which the code is traveling. Enter the maximum line speed here. You can enable Test Mode to read your smallest code.

Select Code Element Size to calculate with the size of the most narrow code element. Enable Test Mode to read your code. Give the direction your code is traveling in and the maximum line speed.

At the bottom of the Assistant you get the current and the recommended maximum exposure time.

For Hand Presentation type applications, present your code(s) to the reader in the various positions you need to read them. The assistant analyzes the code size and sets the smallest element size.

Note: DMAE50, DM050, DM060, DM070, DM080, DM150, DM260, DM280, DM290, DM300, DM360, DM370, DM380, DM390, DM470, DM503, DM580