Preventative Maintenance Tests

Pressure This test verifies the pressure accuracy of the monitor’s pressure transducer.

Transducer

Accuracy Test

Step

Action

1

Confirm that the simulator displays "Leak Test" (see steps 1 and 2, in the

 

previous table).

 

 

2

Press the Volume button to ensure that both valves are closed.

 

 

3

Perform an offset adjustment so that the simulator and monitor both display a

 

pressure of 0 mmHg or kPa by doing the following:

 

a. Press the Contrast button on the monitor’s front panel.

 

b. If needed, zero the simulator (see “To Zero the Simulator” on page 4-16).

 

 

4

Press Start on the simulator.

 

 

5

Allow 15-20 seconds for the pressure to stabilize. The pressure displayed on the

 

monitor and on the simulator should be within 5 mmHg (0.7 kPa) of one another.

 

Document the difference between the simulator value and the monitor value

 

(X1).

 

 

6

Press the Stop button on the simulator to stop the test.

 

 

7

Press and hold the Volume button until the monitor displays a pressure of 0

 

mmHg or kPa.

 

 

8

If no further NBP tests are to be conducted, turn the monitor Off. Normal

 

monitoring operation returns the next time the monitor is turned On.

 

 

Pneumatic This test verifies the integrity of the pneumatic system.

Leakage Test

Step

Action

 

 

1

Turn the simulator on.

 

 

2

Perform the following sequence:

 

a. Press the Home button.

 

b. Press the Pressure Tests button.

 

c. Press the Pressure Leak Test button.

 

d. Press the Setup button.

 

e. Press 3, 0, 0, then Enter.

 

f. Set the Cuff to Internal.

 

 

3

Confirm that the simulator test screen is active and displays "Leak Test".

 

 

4

Press the Volume button to ensure that both valves are closed.

 

 

5

Perform an offset adjustment so that the simulator and monitor both display a

 

pressure of 0 mmHg or kPa by doing the following:

 

a. Press the Contrast button on the monitor’s front panel.

 

b. If needed, zero the simulator (see “To Zero the Simulator” on page 4-16).

 

 

6

Press the NBP button on the monitor’s front panel to activate the pump. Hold the

 

button until the monitor displays a pressure of approximately 250 mmHg

 

(33.3 kPa).

 

 

7

Allow 15-20 seconds for the pressure to stabilize. Record the pressure displayed

 

on the monitor (P1).

 

 

Testing the Monitor 4-17

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Philips 862474, 862478 manual Transducer Accuracy Test, Leakage Test

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