Overview
DSX™ System Service Manual 10-1
Chapter 10 The Reader Module
10.1 Overview
The Reader Module is used to determine the optical density of the contents of each well in the
well plate. This information is transmitted to the personal computer and the Revelation
application program is used to determine (and report) the concentration of the compound(s) of
interest.
The service engineer is expected to replace the lamp and replace filters. These activities are
described in the section entitled, Removing External Components on page 11-11.
If there is a fault in the Reader Module (other than a defective lamp or filter), the normal
service activity is the replacement of the module. The defective module should be returned for
repair. In some situations, the service engineer may be able to repair the module on site. A
description of a broad variety of replacement/repair activities is presented in the section
entitled, Spare Parts on page 11-49.
10.2 Design of the Optical Module
10.2.1 General Characteristics
The Reader Module is a microprocessor-controlled photometer module designed to measure
the optical density of fluid samples in 96 well microplates. The module has a wavelength
range from 405 nm to 690 nm and can read in single, dual or multiple wavelength modes. The
reading time is less than 10 seconds in single wavelength mode and less than 20 seconds in
dual wavelength mode. The Verification Plate can be used to check performance of the reader
upon installation or during periodic maintenance checks.
The unit has a sequence of self-test diagnostics that are performed each time the unit is
powered up, these tests provide the user with the assurance that the instrument is functioning
within acceptable parameters.
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