Alnor 9870 Owner's Manual page 11

The meter continually monitors its battery supply
voltage. When the battery life falls below 15%, the
battery indicator (BAT) in the upper left corner of
the display will blink on and off. This indicates a
low battery condition and means that the batteries
will soon need to be replaced.
♦ Once the BAT indicator begins to blink, you
still have a few minutes to complete the meas-
urements you are making. While the indicator is
blinking, the meter continues to measure accu-
rately.
If the battery voltage falls below 3.5 VDC, the
display will read "LO" and the BAT indicator will
be on continuously. Batteries must then be replaced
before velocity readings can be taken.
If you do not install fresh batteries and the voltage
falls below 2 volts, the display will go blank.
♦ Alkaline batteries are recommended for longest
life, and the battery life indicator will be most
accurate with alkaline batteries.
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