Sper Scientific 850023 Anemometer SD Card Logger - Manual (Page 7)

7
POWER SUPPLY
This meter can be powered by six AA (1.5 V, UM3)
batteries or an optional 9 Volt DC adapter. See page 22 for
battery replacement instructions.
Plug the adaptor into the power port labeled “DC 9V,”
located on the side of the meter.
Note
When using the adapter to run the meter, the meter will
remain permanently on and the POWER button will be
disabled.