BIRD MARK 7 - Controlled Expiratory Time Verification

16.0 CHATTER TEST
16.1 Mark 7
Remove test lung and adjust respirator for max-
imum INSPIRATORY FLOWRATE, minimum pres-
sure, minimum sensitivity, EXPIRATORY TIME,
“OFF” and MASTER SWITCH “ON”.
Mark 7A
Remove test lung and adjust respirator for max-
imum INSPIRATORY FLOWRATE, minimum pres-
sure, minimum sensitivity, PRESSURE/TIME-
CYCLED SELECTOR SWITCH “OUT”,
EXPIRATORY TIME "OFF" and MASTER
SWITCH “ON”.
16.2 Respirator should chatter at a steady, even
rhythm.
17.0 MARK 7A — APNEUSTIC FLOWTIME
17.1 Install test lung, adjust INSPIRATORY
FLOWRATE to minimum, push the PRESSURE/
TIME-CYCLED SELECTOR SWITCH “in” and
insure APNEUSTIC FLOWTIME control is full
clockwise.
17.2 Adjust STARTING EFFORT and PRESSURE
SELECTOR arm to 20 and cycle respirator “ON”.
Observe a short delay (less than .5 seconds)
from the time the hand timer rod moves “OUT”
until the exhalation gate “opens”.
17.3 Rotate the APNEUSTIC FLOWTIME control
full counterclockwise. The delay mentioned
above should be 3.0 seconds.
17.4 Rotate APNEUSTIC FLOWTIME control full
clockwise, pull PRESSURE/TIME-CYCLED
SELECTOR SWITCH “OUT” and slide safety
catch into position.
18.0 CONTROLLED EXPIRATORY TIME
18.1 Insure test lung is attached to breathing
assembly.
18.2 Adjust STARTING EFFORT SELECTOR to
20, position the PRESSURE SELECTOR to 20
and rotate CONTROLLED EXPIRATORY TIME
control to the 12:00 o'clock position.
18.3 Check for a 3.0 second (+.5 sec.) delay
from the opening of the exhalation valve (respira-
tor “OFF") until it closes (respirator “ON’”).
18.4 Rotate the CONTROLLED EXPIRATORY
TIME knob full counterclockwise and check for
a .5 to 1 second expiratory time.
18.5 Rotate this control full clockwise “OFF” and
insure respirator does not cycle for at least 3
minutes. ti -
19.0 PRESSURE RELIEF VALVE
19.1 Remove test lung from the breathing
assembly and position PRESSURE SELECTOR
arm full clockwise.
19.2 Cycle respirator “ON” and occlude end of
breathing assembly.
19.3 Observe pressure manometer for stabiliza
tion of needle at 30cmH,0 pressure or adjust to
desired relief pressure.
19.4 Adjust PRESSURE SELECTOR arm back to
20.
19.5 Turn MASTER SWITCH “OFF” and source
gas “OFF”. Remove calibration regulator and
breathing assembly from respirator.
CALIBRATION IS NOW COMPLETE.
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