When the lithium battery voltage is below approximately 2 volts, your data logger operation may be affected-even with the main power supply connected. When the voltage is below 2.7 volts and the main power supply is removed, there is a risk that you could lose data, the program, and the clock setting. What happens if the lithium battery voltage gets too low? A new internal battery supplies approximately 3.6 Vdc, and it should be replaced when its reading is at or below 2.7 Vdc. Typically, the voltage is extremely stable if the data logger is powered from another source and its temperature is stable. Recommended for You: Review the ' Connect Window Tutorial.' The CR300, CR310, and CR200X-series dataloggers are exceptions, as they do not measure this voltage. The lithium battery voltage is measured by the data logger once per day, and the value is held in the Status table. How often is the lithium battery voltage measured by the data logger? A lithium battery, however, is still present for maintaining the clock time. Note: Data loggers such as the CR300, which use flash memory for data storage, do not require a lithium battery for data protection.

When the data logger is reconnected to 12 volts, it seamlessly begins logging data again.

When the data logger is disconnected from 12 volts main power, the lithium battery maintains the data logger clock and data. Since the release of the CR10X, Campbell Scientific data loggers have included an internal lithium backup battery. This backup battery should be periodically checked so you don’t end up stranded in the field without your data. Your Campbell Scientific data logger has a spare battery to protect your data. When was the last time you checked the air pressure on your automobile’s spare tire? What if you were driving along, got a flat tire, and discovered that your spare tire was flat as well? We don’t often think about our spare tire until we need it, and the same may be true for our data logger’s spare battery.

Lithium battery logger