Biotek ELx808, Operator'S Manual

Page: 34 / 172

12
| Chapter 2: Installation
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Dust: Optical density readings may be affected by extraneous particles (such
as dust) in the microplate wells. A clean work area is necessary to ensure
accurate readings.
3: Install the Filter Wheel
The filters that ship with the ELx808 are installed in the six-position filter wheel. For
example, the standard models have 405, 450, 490, 630 nm filters; the UV model’s filter set is
405, 450, 490, 630 and 340 nm.
The filter wheel, which is packaged in a shipping envelope, must be installed before the
reader is used. If you plan to install additional filters, or change the filter locations, use the
following instructions to gain access to the filter wheel (refer to
Figure
2 on page 13):
1. If the reader is on, turn it off and disconnect the power cord or power supply.
2. Remove the seven screws around the perimeter of the shroud with a
screwdriver.
™
Tip: Bring the reader to the edge of the work surface to access the screws
without having to turn the reader upside down.
3. Carefully lift up the shroud from the front. (Note that the shroud is hinged along
its back edge.) Hold the plate access door steady, or tape it closed as the shroud
is being lifted to prevent the door from moving.
4. Ensure that all locations on the filter wheel contain either a filter or a blank. Each
location on the filter wheel must be occupied for the reader to operate properly.
Take a moment to record the filter values in each location
(e.g., 405 nm in position 1).
Important!
Keep track of all filter locations. The physical
location of the filters must match the filter locations mapped in
the reader’s software filter table. The filter wheel must have no
empty locations; all locations must be filled with either a filter
or a blank plug. Install all filters with the arrow denoting the
light direction pointing downward.
5. The filter wheel mount is located in the left-rear corner inside the reader. The
filter wheel is held in place by a magnet on the filter wheel motor hub. To install
the filter wheel:
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Line up the registration notch on the hub and the corresponding peg on the
filter wheel.
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Apply firm pressure to attach the filter wheel to the hub. The peg must be
engaged in the notch for proper installation.
BioTek Instruments, Inc.