Heyer Modular+ - Functional Tests; Pneumatic Tests

Preventive Maintenance
62
4.3.4 Functional Tests
4.3.4.1 Pneumatic tests
1 Perform automatic compliance test.
a Turn on the Modular
+
and ensure adequate drive gas is present
b Attach a breathing circuit the patient module.
c Seal the Y-piece by attaching the open port to the parking place on the side of the patient
module.
d Turn off the fresh gas flow or set it to minimal flow in case of basil flow configuration.
e Select OK to start the test. The test calibrates the ventilator for tubing compliance at 40 Pa x
100 (40 mbar; 40 cmH
2
O) and performs a leak test on the patient circuit pneumatics between
the decoupling valve and the expiratory valve.
f Verify successful completion and that no leaks are indicated.
2 Perform automatic leak test.
a Turn on the Modular
+
and ensure adequate drive gas is present. Enter the Leak Test via the
Options menu.
b Attach a breathing circuit the patient module.
c Connect the y-piece to the hose end where the reservoir bag normally is connected.
d Turn off the fresh gas flow or set it to minimal flow in case of basil flow configuration.
e Set the APL valve to max (fully closed)
f Select OK to start the test. The test pressurizes the system the pneumatic system all the way
back to the spindle valve of the flow meters.
g Verify successful completion and that a minimal leak (less than 300 ml/min at 40 cmH
2
O) is
indicated.
3 Perform the manual pressure test.
a With the selector switch of the Modular
+
turned to the manual position, attach a breathing
circuit to the patient module.
b Connect the y-piece to the hose end where the reservoir bag normally is connected.
c Set the APL valve to max (fully closed).
d Rotate the O
2
or AIR spindle until 60 Pa x 100 (60 mbar; 60 cmH
2
O) is observed on the
screen.
e Reduce the gas flow by counter rotating the spindle until the pressure stabilizes at 60 Pa x
100 (60 mbar; 60 cmH
2
O)
f The gas flow indicates the Modular
+
’s leak rate. If the automatic Compliance and Leak test
have passed, this test will indicate a leak in the drive gas system, or may be used to
troubleshoot system leaks at a higher-pressure level.