Welch Allyn Atlas Service Manual page 17

Section 2 - Service
Note
: Adjust regulator to
approximately 2 PSI.
valve
Figure 2.3.2.11
NOTE:Replace water trap
every 6 hrs of use. Treat
water trap and used
NasalCO2 Sample lines
as bio hazard material!
SR856: CO Calibration
2
beyond the year 2021
8 WELCH ALLYN ATLAS MONITOR
2.3.2.4 Remove water trap from water trap socket .
2.3.2.5 Message "Install scrubber" will appear .
2.3.2.6 Attach scrubber to water trap.
2.3.2.7 Insert scrubber/water trap assembly into water
2.3.2.8 Change the default value (10%) to the value of
2.3.2.9 Press <BP Start/Cancel>
vent
2.3.2.10 When instructed, remove the scrubber from
2.3.2.11 Attach the calibrated source of CO
watertrap
2.3.2.12 Adjust the CO
Important: Once positive flow is
established, let the it flow for one minute
before pressing the Continue button and
actually sampling.
After one minute, press the Continue
button to let the Atlas start sampling CO
2.3.2.13 Press <BP Start/Cancel>
(Note: Serial Communication is not the cause of a failure
if the Prion Serial appears in the Service Screen.
Therefore the problem is with the board or connections
and not serial communication problems.)
To calibrate the CO
necessary to reset the system clock to an earlier year,
perform the calibration, and then set the clock to the
correct year again. The service center should keep a
record of this since the Cal display in the Service Mode
screen will be incorrect.
trap socket.
Message "Enter span gas value using
<Set> button" will appear.
span gas being used (calibrated 8% to 12%
concentration known to ±0.01%).
Message: "Sampling" appears while the
instrument is sampling the scrubber air.
the CO water trap. Do not remove water trap.
2
to the CO side-stream sampling tube as per
2
Figure 2.3.2.11
allow a small amount of gas to flow out of the
vent (approximately 3 PSI).
Message: "CO
"CO calibration failed" will appear on
2
the CRT display.
2.3.2.14 Press Trend button to Exit.
system in years 2022 or later it is
2
SERVICE MANUAL 6200-43E REV. A
regulator just enough to
2
calibration successful" or
2
gas
2
.
2.