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NM3
5.5
BAROMED Monitor Calibration
5.5.1
Turn the System Power switch to STANDBY.
5.5.2
Disconnect any external serial interface cables from the back of the
monitor housing.
5.5.3
Remove the two monitor housing back cover retainer screws, and
swing open the back cover.
5.5.4
Remove the top shelf from the monitor housing and disconnect its
ground wire.
5.5.5
Disconnect the breathing pressure line from the absorber and connect
it to a test fixture having TEE connector, digital pressure meter, and
an inflation device (see Figure 5-5).
5.5.6
Press and hold the
and turn the System Power switch to ON.
5.5.7
With the digital pressure meter reading zero, adjust R13 on the
monitor until the monitor display window reads
5.5.8
Increase the pressure until the digital meter reads 60.0 cm H
5.5.9
Adjust R4 on the monitor until the monitor display window reads
60.0
NOTE: Because the zero and span adjustments interact, it is necessary to
repeat Steps 5.5.7 thru 5.5.9 until a valid calibration is obtained.
5.5.10
Place a small drop of red Glyptal insulating varnish on the R4 and
R13 adjustment screws to lock them in place.
5.5.11
Turn the System Power Switch to STANDBY and remove AC power
from the machine.
5.5.12
Reinstall the top shelf on the monitor housing and re-connect its
ground wire.
5.5.13
Close the monitor housing back cover and replace the retaining
screws. Re-connect any external cables that were previously removed
from the serial ports.
5.5.14
Connect the breathing pressure line from the sensor interface panel
to the absorber.
RETURN TO THIS MANUAL'S TABLE OF CONTENTS
ADJUSTMENT AND CALIBRATION PROCEDURES (continued)
± 2.0 cm H
O.
2
5-15
RETURN TO CD-ROM TABLE OF CONTENTS
and
keys on the Baromed monitor panel,
00.0
± 0.5 cm H
O.
2
O.
2
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Troubleshooting
