I think you will find that it is a switching power supply.

These started appearing a few years ago, and are now the norm. Saves a lot of manufacturing costs.

It is automatic as the power supply detects the available voltage and adapts accordingly, meaning all local distributors need do is insert a power cable into the carton with the correct "wall socket" termination for the particular country. The instrument end, being the standard IEC connector is the same for all countries.

It is very easy to tell...just look at the label above/below the socket and it will read 110-250V if it says that, then it is an automatic switching supply.

Dennis



[This message has been edited by miden (edited 10-14-2008).]