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116 Chapter 9
6. Perform a selftest.
My screen appears distorted
The screen may appear distorted or have a “rainbow” appearance if
you are wearing polarized sunglasses, are in bright sunlight, or in
extreme high or low temperatures. If your screen appears distorted:
■
take off your sunglasses
■
move into the shade
■
make sure your pump is not in direct heat (example: next to a
heater) or cold (worn on the outside of your clothing on a very
cold day) temperatures.
Do not return the pump; this is a normal property of this type of
screen on any device.