Norsonic NOR150, Instruction Manual

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10 Chapter 2
Taking a closer look at Nor150
If power fails
If the battery voltage drops below 9 V, the battery
indicator turns red and after a short while the
instrument will start to shut itself off. Any ongoing
measurement will be terminated and stored. Memory
contents are retained without the use of electrical
power (flash memory). Upon inserting a fresh battery
pack, or connecting to a proper DC voltage source,
the instrument will start-up again, and ask the operator
for the confirmation to store the previous measurement
in the normal way.
Should the external power fail during a measurement,
without any internal batteries installed (or the installed
batteries have no power left), the instrument will be
turned off immediately without storing the ongoing
measurement. However, as the instrument automatically
makes a backup storage every 2 minutes, the last
file stored will include the correct results except for
maximum the 2 last minutes prior to the power failure.
Upon return of the external power, the instrument will
automatically start to measure as if the
START/STOP
key had been pressed.
The Nor150 has a built in power saving feature that
turns down the backlight and eventually switch itself
off if left unattended in ready mode (I.e the instrument
is not measuring or is in ended mode).
Power saving - maximize your
battery power
The Nor150 has a sophisticated power saving system
to maximize the battery power. In the
Setup / Instrument
/ Power Setting menu
you may adjust time-out for the
brightness levels of the display and keyboard and turn
off the GPS.
It is recommended to turn off the keyboard backlight
if not needed, and tune down the display backlight to
a reasonable level. Also, switch off GPS if not in use.
Unplug interface cables if not in use. Especially the
LAN system draws quite much power when connected.
Some displays, like the L/t graph uses more CPU power
and thus increases the power consumption. However,
when the display turns off due to the backlight off time
settings in the power saving menu, all display updating
processes are turned off in order to optimise the power
consumption.
Further, the l/t sampling rate and audio recording are
influencing the DSP work load and thereby the power
consumption. Optimising the measurement settings will
also help on the power consumption.
Following these simple guidelines will help you to get
as much out of the batteries as possible.