OPERATION Stereo microscopeZEISS Setting reflected-light illumination Stemi 50832 435064-7044-001 01/20154.2.4 Controller K LEDThe Controller K (Fig. 19/4) is used to activate thering illuminator in case of applications with boomstands A or U or additional stands.• Mount the stands A and U including thefastening of the Stemi 508 body to the Stemimount as described in the operatinginstructions for the boom stands.• Screw-fasten the front lens system (Fig. 19/7) tothe microscope body.• Clamp ring illuminator to the front lens system.Before using the front lens systems 0.3xor 0.4x, fasten the retainer ring A53mounting the ring illuminator to thefront lens system.• Secure the adhesive side of the magnetic plate(Fig. 19/7) to the swivel arm stand.• Plug the connection cable supplied with thedevice (1 m long) (Fig. 19/2) into the socket(Fig. 19/8) on the ring illuminator and into thesocket (Fig. 19/3) on the back of thecontroller K.• Place controller K (Fig. 19/4) next to themagnetic plate (Fig. 19/7).• Connect controller K to the power supply using the power unit (Fig. 19/1).• Align swivel arm stand (Fig. 19/6) to enable an ergonomic working position.• Turn the knob (Fig. 19/5) on the controller K to switch the ring illuminator ON and adjust illuminationintensity by turning the knob.• Place specimen in the illuminated specimen field.• Set the stereo microscope to its initial setting, see Section 4.1 on page 29.Fig. 19 Controller K LED