BIO RAD Gel Doc 2000ChemiDocChemiDoc XRS Hardware Instruction Manual page 21

Camera Lens and Filters
The MZL functions are operated from the membrane touch pad or through the buttons present in
the acquisition window in the software. To see buttons in the software acquisition window, it is
necessary to connect the Universal Hood with a null modem cable. (170-7963 or 1707964 –
MAC or PC) from the COM1 to the Serial port of the hood itself. If the only port present is the
USB port then it is necessary to use a USB To Serial converter (Part # 1707960) for PC and
Part # 170-7959 for MAC.
Lens Control section
The membrane pad has a Fast and a Slow button to obtain rapid or fine adjustments of the lens.
An image can be optimized with the following lens adjustments:
Aperture is adjusted using the " Iris " buttons on the membrane touch pad. Aperture allows the
CCD sensor to take in more or less light. Pushing the aperture button on Close (-) decreases the
amount of light coming into the sensor, thereby making the image darker. Pushing the aperture
button on Open (+) increases the amount of light coming into the sensor, resulting in a lighter
image.
Focus is adjusted using the " Focus " buttons on the keypad. Pushing the button Near (+) or Far
(-) changes the focal point of the lens and allows user to focus on the sample.
Zoom is adjusted using the " Zoom " buttons on the keypad. It allows you to change the size of
the image on the screen. Pushing the Wide (-) button ZOOMS OUT the image (far field).
Pushing the Tele (+) button ZOOMS IN the image (close up)
Filters: The +1 Diopter is already installed on the lens. This Diopter should always remain on
the lens assembly. An Amber Filter is included in the accessory kit box. This may be screwed
on the sliding filter device. The Amber filter is designed to be used only with UV
transilluminator for fluorescence and White light transilluminator applications.
Membrane touch pad – Lens Control Section
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