Internal battery
The lithium battery powers the internal clock
To prevent clock and memory issues, it is recommended you proactively replace the battery every
The battery is replaced during regular factory recalibration, which is recommended every 3 years. For more information, see Data logger calibration.
When the lithium battery is removed (or is depleted and primary power to the data logger is removed), the CRBasic Campbell Scientific's BASIC-like programming language that supports analog and digital measurements, data processing and analysis routines, hardware control, and many communications protocols. program and most settings are maintained, but the following are lost:
- Run-now and run-on power-up settings.
- Routing and communications logs (relearned without user intervention).
- Time. Clock will need resetting when the battery is replaced.
- Final-memory data tables.
A replacement lithium battery can be purchased from Campbell Scientific or another supplier.
- AA, 2.4 Ah, 3.6 VDC (Tadiran TL 5903/S) for battery-backed SRAM and clock. 3-year life with no external power source.
Misuse or improper installation of the internal lithium battery can cause severe injury. Fire, explosion, and severe burns can result. Do not recharge, disassemble, heat above 100 °C (212 °F), solder directly to the cell, incinerate, or expose contents to water. Dispose of spent lithium batteries properly.
The Status field Battery value and the destination variable from the Battery()
instruction (often called batt_volt
) in the Public table reference the external battery voltage.
For additional information on the internal battery, visit the Campbell Scientific blog article, Get to Know Your Data Logger’s Spare Tire: The Lithium Battery .
Replacing the internal battery
It is recommended that you send the data logger in for scheduled calibration, which includes internal battery replacement. See Data logger calibration.
Any damage made to the data logger during user replacement of the internal battery is not covered under warranty.
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Pull the bottom and top of the data logger apart.
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Disconnect the battery connector.
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Reassemble the data logger.