START-UPZEISS Switching the microscope on/off Axiolab 576 430037-7444-001 05/20193.4 Switching the microscope on/off• Switch the microscope on/off using (Fig. 3-32/1)the on/off switch.• If available, select the transmitted or reflectedlight illuminator by pushing the TL (Fig. 3-33/4)or RL (Fig. 3-33/3) button.The respective indicator light is continuouslyilluminated in green.• Adjust image brightness using theIntensity/LM knob (Fig. 3-33/2).To do this, take hold of the recessed grips ofthe knob with your fingertips and turn it to thedesired position.Pressing the Intensity/LM knob initiates furtherfunctionality, see sections 2.4.8 and 3.5.• Select Permanent or ECO mode (Fig. 3-33/5)for using the microscope illumination.If Permanent mode is active: The illumination iscontinuously switched on.If ECO mode is active: The illumination switches offafter 15 minutes without action.Only Axiolab 5 stand, Bio-TL/FL:• Select the desired LED for fluorescenceapplication using the LED selection knob(Fig. 3-33/1).Fig. 3-32 Mains switch on left side ofmicroscopeFig. 3-33 Intensity/LM knob and illuminationmodes