CareFusion PrinterNOx - Page 23

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21
Press ENTER on the keypad and the display will change to:
CalibratingNO
*.............
PressCANCELtoabort
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The sampling pump will start and the PrinterNOx will monitor the
output of the NO sensor until a stable reading is obtained. When
stability has been achieved the calibration factor, time and date are
written into the battery backed memory and the display returns to
the previous screen. Remove the control valve by turning anti-
clockwise to stop the gas flow. The NO
2
sensor can now be
calibrated using the same procedure if required.
Within the lifetime of the sensors, zero drift of more than 10ppm
(1ppm for NO
2
) or a calibration drift of more than 40% implies
abnormal ageing of the electrochemical cell. If these errors are
detected during the zeroing procedure or the calibration adjustment
then the following will be displayed:
-------ERROR-------
Readingoutofrange:
Checkgassupplyand
tryagain.
Refertomanualif
errorrecurs.
Pressanykey

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