Mains adapter
A mains adapter (Nor3XX) is included with the delivery. Use it as often as you can. Then your batteries are charged when you need them.

If your mains adapter has disappeared, you can order a new one from Norsonic AS or your local representative.

ExternalPower
It is possible to use an external dc voltage of 11 – 16 volt. The power consumption of the Nor150 is approximately 2 watt dependent on selected modes of operation. The external DC source should have source impedance less than 1 ohm and be able to supply at least 500 mA. If the external supply falls below 9 V, the instrument will use the internal batteries if available. If the instrument has switched off due to loss of power or insufficient supply voltage, the instrument will automatically switch on and resume normal operation after reapplying the external DC supply. Socket for external DC: Lemo type XX with positive voltage on centre-terminal. The instrument will automatically switch off if the battery or external voltage is too low for operation within the stated specifications.