Table 8 Description Of System Test - GE Datex-Ohmeda S/5 Series Technical Reference Manual

Datex-Ohmeda S/5 Compact Anesthesia and Compact Critical Care Monitors
Table 8
Test label
Pump unit function
Cath press = pump press
Tubing leak test
Pump unit leak test
Cath conn. leak test
Block test
Zero valve function
Pump valve function
56
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Document no M1144955-001
Description of system test
Description
Stepper motor aspirates/pushes room air
through the zeroing valve. If the stepper is
working properly, it is able to generate small
negative/positive pressure at the pump unit
pressure sensor.
Pump pressure sensor and catheter pressure
sensor readings are compared at three
pressures: at ambient pressure, at approx.
+100 mbar and –100 mbar.
The air tightness of the module inner tubing
from the zeroing valve to the pump valve is
tested.
The air tightness of the pump unit is tested.
The air tightness of the zeroing unit and
catheter connector is tested.
Air is aspirated through the zeroing valve. If
pressure at the pump pressure sensor drops
too much, the tubing/valves from the zeroing
valve to the pump pressure sensor is blocked.
Module pneumatic system pressurized and
then the zeroing valve is opened to room air.
If the pressure does not drop, the zeroing
valve may not be functioning.
Module pneumatic system pressurized and
then the pump valve is opened to room air. If
the pressure does not drop, the pump valve
may not be functioning.
If test fails
Check the function of stepper
motor.
Calibrate the pressure sensors.
Check tubing and connections
for leaks.
Check pump unit for leaks.
Make sure that the catheter
connector is properly closed
during the test. Check the
zeroing unit and the catheter
connector for leaks.
Check the tubing/valves for
blocks.
Check the function of the
zeroing valve.
Check the function of the
pump valve.