Stephan EVETR - Running Zero Calibration

®
8 CO2 measurement (optional)
 Fritz Stephan GmbH
GA-070T-0518V2.7-HAO-EN
181
8.1.5 Running zero calibration
NOTE
Zero calibration is only necessary if deviations in gas values are observed or if the
"CO
2
accuracy out of range!" alarm is displayed.
WARNING
Mistakes made during zero calibration cause erroneous measurements.
CAUTION
For correct zero calibration, the airway adapter MUST be surrounded by room air
(0% CO
2
). For this reason, it is particularly important not to breathe in the vicinity of
the airway adapter before and during zero calibration.
CAUTION
When replacing the airway adapter, you have to wait at least 10 s before you can
perform the zero calibration.
For highest measurement accuracy, the following recommendations for
zero calibration should be followed:
 For zero calibration, connect the IRMA™ probe to the EVE
TR
and
attach to a new IRMA™ airway adapter. Do not connect the adapter
to the ventilation system.
 Switch on the EVE
TR
and wait approx. 10 s until the probe has
reached its optimum measurement accuracy.
 Press the corresponding field in the EVE
TR
"Capnometry" menu (see
chapter 4.2.2) to start the zero calibration. The probe's LED flashes
green during zero calibration.
 Every zero calibration must be followed by a functional test.
If zero calibration is immediately followed by a "CO
2
sensor zero
calibration!" alarm, the procedure must be repeated.