BIRD MARK 7 - SECTION 8 OPERATIONAL VERIFICATION PROCEDURE; Manometer, Flowrate, and Power Driveline Verification; Limit Controls, Sensitivity, Chatter, and Apneustic Flowtime Verification

CALIBRATION
AND
TROUBLESHOOTING
SECTION
7:
CALIBRATION AND TROUBLESHOOTING
pressure.
2. Leak in breathing circuit.
3. Gas leaking between pressure
compartment and centerbody
gasket.
4. Gas escaping from pressure
compartment to ambient
PROBLEM POTENTIAL CAUSE CORRECTIVE ACTION
80cmH,0 cannot be 1. PRESSURE RELIEF valve 1. Adjust to a higher venting
reached. adjusted for a lower venting pressure.
2. Find and correct.
3. Secure.
4. Remove ambient compartment
and apply leak detecting
compartment.
solution on retaining ring
around master diaphragm and
diaphragm itself. Correct leak.
C. CALIBRATION TEST
if the following parameters are not met, refer to B.,
Calibration of the Unit, to obtain correct values.
Insure a static 50 psig driving pressure to the
respirator.
11.0 AIRWAY PRESSURE MANOMETER
11.1 Turn MASTER SWITCH “OFF” and remove
test lung from breathing assembly.
11.2 Check for zero reading on gauge.
12.0 INSPIRATORY FLOWRATE
12.1 Insert Orificed Adapter (P/N 6855) onto
breathing assembly and turn MASTER SWITCH
“ON”.
12.2 Rotate PRESSURE SELECTOR arm to end
of medium range and insure that the CON-
TROLLED EXPIRATORY TIME control is full
clockwise — “OFF”.
12.3 Cycle respirator “ON” and rotate the
INSPIRATOR FLOWRATE control to the following
positions. Flow through the orificed adapter
should produce the parameters below:
INSPIRATORY FLOWRATE
" Airway Manometer
Position Pressure
Full clockwise (5:00 MARK 7
o'clock position) 18-24 cmH。O
MARK 7A
14-18 cmH。O
Full counterclockwise MARK 7
34 cmH,0 or higher
MARK 7A
30 cmH,0 or higher
13.0 INSPIRATORY POWER DRIVELINE
13.1 Remove Orificed Adapter (P/N 6855) from
breathing assembly.
13.2 Insert Inspiratory Power Driveline Gauge
(P/N 6758, 0-60 psig) into INSPIRATORY
POWER DRIVELINE socket.
13.3 Cycle respirator “ON” and recheck for
pressure reading between 12-25 psig.
13.4 Remove Inspiratory Power Driveline Gauge
(P/N 6758) and reconnect INSPIRATORY
POWER DRIVELINE.
14.0 PRESSURE-CYCLED LIMIT
14.1 Insert test lung onto breathing assembly.
14.2 Mark 7
Rotate INSPIRATORY FLOWRATE and CON-
TROLLED EXPIRATORY TIME control knobs full
clockwise.
Mark 7A
Rotate INSPIRATORY FLOWRATE and CON-
TROLLED EXPIRATORY TIME control knobs full
clockwise and insure the pressure/time cycled
selector switch is “OUT”.
14.3 Position the PRESSURE SELECTOR arm to
20'and cycle the respirator “ON”.
14.4 The unit should cycle “OFF” (hand timer
rod moves “OUT”) at 20 cmH,0.
15.0 STARTING EFFORT
15.1 Remove test lung and insert mouthpiece
anto breathing assembly.
15.2 Position SENSITIVITY SELECTOR arm to
20. A slow-and gentle inspiratory effort should
cycle
the
respirator
“ON”
at
a
—2cmH,0,
as
indicated on manometer.
— 30 —