Welch Allyn 74710 Otoscope / Ophthalmo
Welch Allyn 74710 Otoscope / Ophthalmo
64163 - Welch Allyn 74710 Otoscope / Ophthalmoscope (3.5Volts)

Green Power Light not lighting Welch Allyn 74710 Transformer, instruments will light automatically when handles are lifted from holder. Adjust rheostat knob until desired lamp brilliance is obtained. Turning rheostat clockwise increases light, counterclockwise decreases light. A built-in, automatic voltage regulator provides maximum illumination and lamp life. The instrument's lamp is automatically turned off when handle is replaced on holder. Transformer may be turned off by turning the switch off. Pilot light alone draws current when instruments are not in use. When unit is not in use for more than a few hours, turn switch to off position to insure longer operating life. Unit can be left plugged in permanently. Welch Allyn 11710 3.5 V Standard Ophthalmoscope Head Halogen light for true tissue color and consistent, long-lasting illumination 6 apertures for generalist use: micro, small, and large spot sizes, fixation target, slit aperture, and red-free filter 28 focusing lenses with a range of -25 to +40 diopters Rubber brow rest prevents scratching of eyeglasses Welch Allyn 25020 3.5 V Diagnostic Otoscope Head 3.5V Halogen HPX lamp provides light output for true tissue color and long-lasting performance Wide-angle viewing lens