Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 7
2.3.1 BP Calibration :
Need: 500cc vessel (approximate)
calibrated digital manometer
squeeze bulb with one-way valve
tubing and T fittings
PC with HyperTerminal *
serial cable
2.3.1.1 Connect: manometer, bulb, and 500cc vessel
to BP port with “T” connectors, Atlas to PC
with serial cable.
2.3.1.2 Turn AtlasON and start HyperTerminal on PC.
2.3.1.3 Enter commands on Serial interface:
Pangea> bp valve close<ENTER>
Pangea> bp safety off<ENTER>
2.3.1.4 Enter command:
Pangea> bp cal 5000
Do not press <ENTER> yet!
2.3.1.5 Raise pressure with bulb to as close to
50.00mmHg as possible or slightly higher. Let
the pressure bleed down toexactly
50.00mmHg. Now press <ENTER> . Take no
more than 3 minutes for this step.
2.3.1.6 Enter command:
Pangea> bp cal 25000<ENTER>
2.3.1.7 Repeat step 2.3.1.5 with 250.00 as target.
Press <ENTER> when pressure deteriorates to
250.00 mmHG.
2.3.1.8 Enter command:
Pangea> nvram write<ENTER>
2.3.1.9 Disconnect serial cable and instruments and
cycle power on Atlas. BP cal complete.
2.3.1.10 Verify accuracy of pressure settings
by repeating step 2.3.1.3 then 2.3.1.5 and
compare Atlas front panel reading with Setra
readout. Do this at 50.00mm and 250 mm Hg.
2.3.2 ET CO
2
Calibration: 623 Models only
Need: Tank of approximately 10% CO
2
, balance N
2
(certified) Blood Gas Mixture
Tubing and T connectors
Watertrap and scrubber
2.3.2.1 Insert water trap. Power up.
2.3.2.2 Place the instrument into Service Mode: Press
Date/Time Lead Select button.
2.3.2.3 Select Calibrate CO
2
Message “Remove CO
2
water trap” will
appear.
2.3 Calibration
2.3.1 BP Calibration
Caution: Improper use, stor-
age, handling of compressed
gas vessels can cause injury
or death! Follow gas manu-
facturers safety processes.
Setra
500cc volume
Figure 2.3.1.1
2.3.2 ET CO
2
Calibration
*Access and set up
HyperTerminal:
1-Start
2-Settings
3-Control Panel
4-Add/Remove Programs
5-Windows Setup
6-Communications
7-selectHyperTerminal
8-APPLY
Settings are:
9600 Baud, 8 bit word, 1 stop bit
no parity, no flow control
ANSI character set
Find HyperTerminal in Programs,
Accessories
NOTE: The Scrubber looks
similar to a watertrap, but
is filled with white granules.
It is included with model
623XX.
NOTE:Replace water trap
every 6 hrs of use. Treat
water trap and used
NasalCO2 Sample lines
as bio hazard material!
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