Leica DM IRB manual Brightness adjustment

Brightness adjustment

Instead of a potentiometer, Leica DM IRB/E microscopes are equipped with an incremental transducer for brightness adjustment. This means that the adjustment wheel is automati- cally moved from clickstop to clickstop and therefore has no end stops.

After it is switched on, the microscope is in nor- mal operating mode. In the first line of the LC display, the current Z position is given in μm or mm on the left.

You can switch to the lamp voltage display by pressing the “CHANGE” key on the control panel. The lamp voltage is displayed in volt from

2.5– 12 V. If you press the “CHANGE” key again you return to the display of the Z position.

The lamp intensity is adjusted by rotating an adjustment wheel on the left side of the microscope. If you hadn’t already switched to the lamp voltage display, this will happen automatically when you move the wheel. Similarly, the display will switch to the Z position if the Z position is changed with the handwheel or by pressing the key.

To switch off the transmitted light illumination, the brightness is first reduced to 2.5 V. Then rotate beyond the lower value.

To switch on again, rotate briefly in the opposite direction.

For photomicrography we recommend a setting of 10.5 V.

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