The Scan Optics Ophthalmic Microscope may be connected to either an earthed mains (90-260V) ac
supply, or a 12V dc supply, or both. The power supply will automatically select the correct mains
voltage. If both ac and dc supplies are connected, the dc supply (eg 12V battery) will act as an
emergency backup for mains power. In this case, the microscope will not run from battery power
unless the mains supply fails or falls by more than 20 percent, or is switched off. If mains power is
restored, the microscope will resume using mains power automatically. The mains power switch on
the microscope does not switch the battery off.
1.
Plug the mains power cable into a mains power socket. International safety standards do not
allow the use of an extension cord.
The mains power supply must have a protective earth
conductor.
If there in no earth conductor, or if the integrity of the earth conductor
arrangement is in doubt, the equipment must be operated from a 12Vdc power source.
2.
Switch on the mains power supply at the wall socket. When the ON/OFF switch on the power
is selected to ON, the power supply indicator on the switch will light and an audible 'beep'
should be heard.
