Crane AU7-PF-23GA Manual Del Usuario página 16

Safety
− Do not subject the display of the pulse watch to bright
sunlight or ultraviolet radiation.
− Keep the pulse watch away from hot surfaces.
− Do not heat up the pulse watch.
− Do not expose the pulse watch to direct sunlight or other
heat sources, e.g. in a vehicle.
− Do not throw the pulse watch into open fire.
− Avoid very strong magnetic fields (e.g. electric welding
equipment, transformers) as they could cause irregulari-
ties when measuring time.
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