Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 29)

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Section 2. Cautionary Statements
The CR800 is a rugged instrument and will give years of reliable service if a few
precautions are observed:
• Protect from over-voltage
• Protect from water
• Protect from ESD
Disuse accelerates depletion of the internal battery, which backs up several
functions. The internal battery will be depleted in three years or less if a CR800 is
left on the shelf. When the CR800 is continuously used, the internal battery may
last up to 10 or more years.
Maintain a level of calibration appropriate to the application.