RBR#0008819revB
5
Clock
The instrument's clock is maintained during brief disconnections. This time is usually sufficient to change batteries or
replace desiccants.
USB-C power
The USB-C cable provides power sufficient for configuration or data download. However, the instrument requires an
internal or external power supply to perform sampling.
Deployment estimates
Deployment times are estimated for
lithium thionyl chloride batteries based on both memory and internal battery
capacity.
External power with voltage of 9.5
V
or higher is required to operate the switching value.
Internal LTC batteries only
(no valve operation)
RBR
fermata
with LTC batteries
(with the valve activated every 20 days)
Speed
Time (days)
Number of samples
Time (days)
Number of samples
8Hz
32
22M
75
45M
4Hz
32
11M
150
45M
2Hz
32
5.6M
300
45M
1Hz
32
2.8M
610
45M
Power supply selection
If connected, an external power supply will be used preferentially over the internal batteries as long as the voltage
remains 4.5V or greater. If it drops below 4.5V or complete disconnection occurs, the system automatically switches to
the internal batteries. The internal batteries are sufficient to maintain sensor operation without the switching valve.
The external power supply and cables shall support inrush currents of up to 5A for proper valve operation.
.
