Beckman DU-65 UV-Visible Spectrophotometer Cat 120650 For Parts Filter Motor

Beckman DU-65 UV-Visible Spectrophotometer Cat 120650 For Parts Filter Motor Fail

The Beckman DU-65 is a benchtop UV-Visible scanning spectrophotometer from Beckman Instruments' DU Series 60 line. It is designed to measure the absorbance and transmittance of liquid samples across the UV and visible wavelength range, with a keypad-controlled interface and built-in software module slot for expanded functionality such as kinetics analysis and data storage. This unit powers on but does not pass its self-test — the display reports a Filter Motor Failure at startup. Occasionally the unit progresses past the filter motor stage and reaches calibration step XZ, but that step also fails most of the time. It is being sold strictly AS-IS for parts or repair; we are unable to fully verify its operation.

Specifications & What's Included

• Manufacturer: Beckman Instruments, Inc. — Scientific Instruments Division, Fullerton, CA
• Model: DU-65
• Catalog Number: 120650
• Series: DU Series 60
• Type: UV-Visible Scanning Spectrophotometer
• Power: 115V, 60Hz, 3A (IEC inlet)
• Form Factor: Benchtop
• Approximate Dimensions: 24" W x 20" D x 10" H
• Front panel: membrane keypad with function keys and alphanumeric display
• Internal software module cartridge slot for plug-in option modules
• Included: Beckman DU Series 60 Operating Instructions binder (Manual 537783 X)
• Included: DU Data Comm Communications Software guide (RS-232 interface documentation)
• Included: Kinetics Soft-Pac Module cartridge and tray
• Included: Memory-Pac Module cartridge (Part Number 598286) and tray
• Country of Manufacture: USA
• Known fault: Filter Motor Failure displayed on self-test; intermittently reaches calibration XZ which also fails
• Sold AS-IS for parts or repair — no functionality guarantee

Applications

The Beckman DU Series 60 spectrophotometers were widely used in university research labs, pharmaceutical QC, clinical chemistry, and industrial analytical laboratories from the 1980s through the 1990s. UV-Vis spectrophotometers in this class measure how much light a sample absorbs at specific wavelengths, making them standard tools for quantifying proteins, nucleic acids, enzyme kinetics, and chemical concentrations. The DU-65 added scanning capability and an expandable software module system — the Kinetics Soft-Pac and Memory-Pac modules visible here extend it to automated kinetics studies and on-board data storage. The included Data Comm software guide supports RS-232 communication to a PC for data transfer. This unit would be of interest to labs needing donor parts for another DU-65 or DU Series 60 instrument, or to a technician comfortable diagnosing and repairing filter motor drive mechanisms in Beckman spectrophotometer platforms.