Ada TEMPRO 550 Operating Instructions Manual page 13

TemPro 550
10. Storage and transportation
Storage and transportation of the instrument should be only in case.
Take out the battery if you are not going to use the instrument for a log time.
Don't expose the instrument to mechanical effects (heating, hits, strong vibrations, humidity, dust ...).
Store the instrument in normal conditions (temperature/humidity).
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MEASUREMENT FOUNDATION