Fresenius Medical Care 4008 E Technical Manual page 564

Bar graph displays for TMP and conductivity (circuit diagram 3/6)
IC 25 (CS7), IC 26 (CS8), and IC 27 (CS9) are provided as data memories for the TMP bar graph
display.
IC 28 (CS10), IC 24 (CS11), and IC 30 (CS12) are provided as data memories for the CD bar
graph display.
The working method of both displays is identical with that of the arterial bar graph displays.
Bar graph displays for temperature and flow (circuit diagram 6/6)
The bar graph displays for temperature and flow are energized by of IC 41 via CS19. The data
lines DB4 to DB7 contain the value for the temperature display. Only 16 of the 20 LEDs of the
temperature display are actually visible. The data lines D0 to D3 contain the value for the flow
display. IC 72/19 is responsible for the brightness control of the temperature display, and IC 72/
18 serves to turn the display dark.
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Fresenius Medical Care 4008 4/09.03 (TM)