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Made in Germany

“Locking” of the Instrument

“Locking” ensures that the instrument exclusively executes

the predefined tasks when left at the customer's place for

long-term recordings. To lock, remove the SD memory card

from the instrument after predefining the measurement set-

tings, set the micro switch on the top left of the SD-card to

“lock” or “write protect” and reinsert it. Note: The data will

still be recorded!

IMPORTANT: Don't forget to “unlock” the SD memory

card finishing a “locked” long term recording!

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

last for up to 36 hours of 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 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-

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

batteries. Please see chapter 9 for information on the initialization of the capacity

display.

Gigahertz Solutions NFA 400 User Manual

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