Power Supply - Gigahertz Solutions NFA 30M Operating Manual

6 Power Supply

6.1 Internal Rechargeable Battery
The instrument features high performance Lithium Ion re-
chargeable batteries (2 x 3.7 V). When fully charged, they will
allow for more than 48 hours of continuous data logging
A vital factor for the durability of Lithium Ion rechargeable
batteries is to absolutely avoid a deep discharge. The NFA
setting will prevent a deep discharge in operation, however,
in view of the inevitable self-discharge, the meter should not
be kept with "almost empty" batteries for longer than a few
weeks only.
6.2 Charging
To charge the batteries use the 15 V AC adaptor. If the de-
vice is switched off while charging, the display will show
"CHAr" and the potential runtime of the instrument with the
current capacity status in an infinite loop. Measurements or
recordings during the charging process are technically pos-
sible, but not specified, and therefore not recommendable.
Thanks to a sophisticated algorithm, the NFA charging pro-
cess will start off extremely quickly, but will slow down to-
wards the end in order to achieve maximum loading capaci-
ty. Due to the large variation in the Lithium Ion batteries
supplied by their manufacturer, the maximum capacity as
well as the charging time are subject to fluctuations. The
specified battery running time is mostly reached after a
charging period of approx. 8-12 hours. A (significantly) long-
er charging period, as well as a recalibration of the capacity
display (see Chapter 9) may considerably extend the battery
running time.
The capacity display can only be considered an estimate. A
reliable information can be obtained by logging until auto-
power-off, and by verification with NFAsoft.
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Please note that Li-Ion batteries, even when treated with care, will lose some of
their original capacity within one or two years and their typical life expectancy is
250-500 complete charge cycles. In this case please always replace both batter-
ies simultaneously. Please see chapter 9 for information on the initialization of
the capacity display.
© Gigahertz Solutions GmbH
- 7 -
Made in Germany
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January 2018