The most common cause of failure for the SM-500 is . If you are using this in a meat or seafood department, ensure you use a "wet cover" (a clear plastic overlay) for the keyboard. This prevents brine and water from short-circuiting the main logic board.
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Add secondary information like "Product of USA" or use-by dates before saving. : Access the Preset Key Programming menu. The most common cause of failure for the SM-500 is