12.1 External DC input (battery charging)
All SPECTRAN RF measurement devices contain a
high-performance battery package which is already
installed in the unit.
However, this battery is not yet
charged due to safety reasons
. Hence, you should
charge it with the included charger. For this, connect
it to your usual mains and plug the small phone jack
into the DC input on the SPECTRAN.
Now turn OFF
your SPECTRAN
and the battery pack will be auto-
matically charged. Full charge is reached after about
24 hours for the standard 1300mAh battery, and
about 36 hours for the 2200mAh version.
Operating with an external power supply:
As described above, the DC input is meant for charging the internal battery pack.
However, it can also be used for operating SPECTRAN independently of the
internal battery pack.
You can also connect other
DC power sources
from
8V to 12V max.
, using a
3,5mm phone jack. Polarization of the jack needs to be as follows:
The
inner conductor
must be “+”, the
outer conductor
must be “-”.
Using our optional car power adapter (see price list), you can also operate
SPECTRAN devices in your car.
Should you wish to operate SPECTRAN via the wall power supply, please note
that the power supply will cause additional interference.
This may lead to mis-
measurement in extreme cases
.
If you wish to use an adequately clean power supply for long-term measure-
ment, it is recommended to operate SPECTRAN on an external, large battery,
which would be able to operate SPECTRAN for several weeks. We particularly
recommend the Aaronia “powerbag” or a comparable third party product. These
offer a regular 12V car adapter and thus can be used directly with our car power
adapter cable.
All cables/devices used for connection to the external DC input must supply a
DC voltage between 8 and 12V via a standard 3,5mm phone jack (inner con-
ductor PLUS, outer conductor MINUS).
12.0 Connections
43
Summary of Contents for SPECTRAN HF-2025
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