User's Guide

15
3 Batteries and Power
The P5 GNSS reference receiver uses an internal rechargeable Lithium-ion battery,
which can be replaced only at an Authorized CHC Service Center.
The receiver can also be powered by an external power source that is connected to
the LEMO ports.
The operational time provided by the internal battery depends on the type of
measurement and operating conditions. Typically, the internal battery provides up to
24 hours operation.
Notes: All operational battery tests are carried out with new, fully-charged batteries
at room temperature, tracking both GPS and GLONASS satellites while storing and
streaming data at 1 Hz. Older batteries, at temperatures significantly higher or lower
than room temperature, will have reduced performance. Power consumption
increases with an increasing number of actively tracked satellites and with increasing
observation and storage rates.
3.1 External Power
The receiver uses an external power source in preference to its internal battery. If
the receiver is not connected to an external power source, or if the external power
supply fails, the internal battery is used.
CHC recommends that the applied external power offers between 12 V DC and 36 V
DC and can supply at least 6.5 W of power for the long-term installations and ensure
that the internal battery is charged and ready to compensate for power supply
disruptions.
While carrying out static measurements for post-processed computations using the
internal memory, if no external power is supplied and the internal battery is drained,
the receiver shuts down. No data is lost; however, when power is restored, the
receiver should be configured again.
WARNING The external AC power adapter and its associated power cord and
plug are not intended to be installed outdoors, nor in a wet location. Do not power
the receiver through external power when operating in a wet environment or an
environment that may become wet. The power input connections must be sheltered.