Introduction
Humphrey FDT User Manual
2660021149532 Rev. B 2015-11
2-4
Controls and Connectors
LCD Display Contrast – Use the UP and DOWN arrows adjacent to the contrast symbol
below the LCD display to adjust the LCD contrast for optimum viewing, based on lighting
conditions.
PATIENT RESPONSE BUTTON CONNECTOR – Connect ONLY the patient response button
supplied with the instrument or an approved replacement to the patient response button
connector on the bottom of the instrument. Connection of any other device to the patient
response button connector may damage the instrument or create an unsafe condition and
will void the warranty.
COMPUTER INTERFACE CONNECTOR – Connect only RS-232 serial compatible computer
ports to the computer interface connector on the bottom of the instrument. Use the
null-modem configuration computer interface cable supplied with the instrument or an
approved replacement cable. Connection of any other computer port or device to the
computer interface connector may damage the instrument. Refer to the computer interface
instructions for additional information.
SOFTWARE UPGRADE CONNECTOR – The blank label on the bottom of the unit adjacent
to this symbol covers the SOFTWARE UPGRADE CONNECTOR. The blank label should only
be removed during a software upgrade and should be replaced when the upgrade is
complete. Refer to the software upgrade instructions to update the instrument software.
Patient Response
Button Connector
Software Upgrade
Connector
Computer
Interface
Connector
Serial Number
Location
