Power Supply - Gigahertz Solutions NFA 30M Operating Manual

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5.2 Long Term Data Logging
The recording interval of the NFA is set to 10 data sets/sec.
Initiating Long Term Logging of the Meter
For a long-term recording of several hours or days, set the "Power" switch to "Log".
(The status LED will turn green and long-term recording will start off after a few sec-
onds. In this mode the LEDs and the sound are turned off to extend the battery life,
after a while also the green status LED.). The display will show the logfile number
("L..."), the elapsed time of recording as well as the remaining time of use in an infi-
nite loop until the battery is empty or the SD-card full. For information on the display
format please see chapter 3. When switching back to "On", recording will be contin-
ued without interruption.
The instrument records all data corresponding to its field selection switch. When an
HF Analyser is connected to the AC/DC socket, it will automatically be recorded as
channel 4.
"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 settings, set its
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 afterwards!

6 Power Supply

6.1 Internal Rechargeable Battery
The instrument features high performance Lithium Ion rechargeable batteries (2 x 3.7
V). When fully charged, they will allow for more than 48 hours of continuous data
5
logging .
5
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. If possible store in a cool place.
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February 2016 © Gigahertz Solutions GmbH