Spectra Precision SP80 - Manual (Page 36)

English
30
Internal vs.
External Power
Source
Consider the following before setting up a base:
• If the base is left unattended for the whole day, you may
want to power it from an external power source that will
provide enough power for your work day.
In this case, you may use the SP80 Field Power kit (see
Optional Accessories on page 3) to connect the receiver to
an external 12 V battery. See diagram in which [1] is cable
P/N 95715 and [2] is cable P/N 83223-02.
NOTE: a “LOW VOLTAGE” alarm will be set when the
battery voltage drops below 11.5 V DC.
• If you intend to work close enough to the base, or someone
is in charge of keeping the base running throughout the
day, you may decide to power the base from its internal
batteries.
For a day’s work, you may need three batteries: Two fresh
ones inserted in the receiver at the beginning of the day,
and the third one may be needed sometime before the end
of the day.
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+
[1]
[2]