Internal Battery - Campbell CR300 Series Product Manual

The operating environment
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How the data logger will be handled
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You can download and print calibration certificates for many products you have purchased by
logging in to the Campbell Scientific website and going to:
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NOTE:
Note, you will need your product's serial number to access its certificate.
Watch an instructional video: http://www.campbellsci.com.au/videos/calibration-certs

21.2 Internal battery

The lithium battery powers the internal clock when the data logger is not powered. The internal
lithium battery life is extended when the data logger is installed with an external power source. If
the data logger is used in a high-temperature application, the battery life is shortened.
To prevent clock and memory issues, it is recommended you proactively replace the battery
every 5 years, or more frequently when operating continuously in high temperatures. For
example, replace at least every 2 years if operating continuously at 80 °C.
NOTE:
The battery is replaced during regular factory recalibration, which is recommended every 3
years. For more information, see
When the lithium battery is removed (or is depleted and primary power to the data logger is
removed), the CRBasic program and most settings are maintained, but the following are lost:
Temporary program memory (current values for variables).
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Routing and communications logs (relearned without user intervention).
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Time. Clock will need resetting when the battery is replaced.
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A replacement lithium battery can be purchased from Campbell Scientific or another supplier.
3 V coin cell CR2025 for battery-backed clock. 6-year life with no external power source.
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See Power requirements (p. 240) for more information.
Data logger calibration (p. 161).
https://www.campbellsci.com.au/calcerts
21. CR300 series maintenance 162
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