7. Preventive Maintenance/System Operational Check-Out
7-97
f.
Pressure Transducer
WARNING!
Do not apply excessive pressure to the pressure chamber or pressure
transducer. The pressure transducer is a precision electromechanical
device and can be damaged with excessive force.
Do not use the
system if the pressure transducer is damaged
.
Prepare at least 2 liters of 37º - 43ºC fluid
i.
Inspect the pressure transducer for damage. Make certain
the surface of the transducer is not cut or punctured. The
pressure transducer must be replaced if the surface is
damaged.
ii.
Make certain the pressure chamber is properly installed and the
flow path is not blocked.
iii.
Make certain the fluid is warm (37º- 43ºC). The pressure chamber
of the disposable is less compliant when it is at room temperature.
Verification must be performed with a warm disposable.
If the
fluid is not warm, go to the Main Infuse screen and warm the fluid
and disposable by pressing the RECIRC key. Let the fluid
recirculated for at least two minutes in AC power before returning
to the Hardware mode for verification.
iv.
In the Hardware mode: close the bag clamps and block the air
vent on top of the reservoir chamber. Disconnect the patient line
and connect the pressure source to the luer fitting at the patient
line port of the disposable set and apply pressure while monitoring
the amount of pressure with a manometer.
v.
Verify the accuracy of the pressure transducer. Apply 300 mmHg
into the disposable. The pressure status line should read 300
mmHg (± 50 mmHg). Repeat the same pressure verification for
200 and 100 mmHg. If the readings are not within the
specifications, recalibrate the pressure. See Chapter 6.
