15. Measurement and Control Circuit Boards: Microprocessor
controlled. Provide operating mode and calibration selections on
the display during setup the dynamic temperature of the sample
freezing chamber. Process calibration data and sample tempera-
ture information. Transmit calibrated test results to the display
and printer.
16. Printer (see figure 6): The printer is mounted on an easy-ac-
cess swing-down door. If no printer paper is protruding or if the
printer stops printing the information displayed on the display
panel, please refer to section E.
17. Display Panel and Keypad (see figure 3): The microproces-
sorcommunicates with the instrument operator by means of
alphanumeric messages on the illuminated display panel located
at the top of the keypad, and printed on paper tape. These mes-
sages report the instrument function currently being performed,
the next operator function required, and the results of tests. The
messages are displayed either in English, French, German, or
Spanish, as selected via the setup menu; the default language is
English.
The keypad contains spill-proof delineated pressure buttons for
operator input to the microprocessor. Switch activation requires
firm finger pressure to the center of the pad. When pressed
properly, the START, STOP, INSERT, RECALL, SETUP,
TEST, and CALIB buttons illuminate to indicate activation.
Table 3 lists the function of each of the buttons. For a complete
listing of buttons and their functions, see table 3 “The Function of
Keypad Switches”.
16
The Advanced
®
Model 4C3 User’s Guide
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