44 DescriptionG-30-1426-en S88 Floor Stand with Lifting Column Issue 9.0Printed on 28. 01. 2009Suspension arm1 Locking cap of arm cover– To open: turn 90° to the left or right.– To close: press down and turn 90° to the left or right.2 Adjustment screw for limiting the downward movement of the armUse this screw to set the minimum vertical distance (working distance)to the surgical field. Move the surgical microscope into the working po-sition. Turn the screw clockwise as far as it will go. Perform this settingbefore each surgical procedure.3 Weight balancing screwAfter mounting the surgical microscope including all accessories, ad-just the balance setting of the suspension arm using this knob. Theprocedure is described in the chapter “Operation“.4 Mounting screwfor mounting the OPMI ® coupling.5 Locking knobfor securing the suspension arm in its horizontal position to allowmounting of the surgical microscope. Once secured, the suspensionarm can no longer suddenly spring upward when insufficient weight isattached.6 Release barAllows non-sterile persons to release the magnetic brakes of the sus-pension system.Release keys for magnetic brakesThe release keys for the magnetic brakes are located on the surgical mi-croscope. After pressing any one of the keys, you can move the articu-lated arm as required. When you release the key, the magnetic brakeslock all axes simultaneously.