CPC 100 V1.41
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Then insert the two upper batteries (next to the cover’s "+" symbol), and push
them all the way in. Make sure you insert them with the "minus" pole going in
first, the "plus" pole pointing towards the compartment’s open cover.
4. Close the battery compartment’s cover tightly until it snaps into position.
5. Press CPOL’s ON push-button. Both polarity LEDs should light up
steadily, and the red LED above the product designation CPOL flashes
shortly.