Teledyne CEA-9001 - Digital, hand-held, flue gas analyzer - Manual (Page 25)

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The menu: 'Max. Draft’ provides a graphic
display of such tendencies as rising or falling
temperatures, which are indicated by
oscillations of the bar graph. As soon as the
temperature has stabilized the bar graph
appears in the center of the display.
Note: If necessary, intermediate storage of
measured values is possible as follows:
All measured value will be stored in
the intermediate storage.
When the over-range value of 4.000
ppm has been reached the CO flush
pump is switched on automatically.