Overpressure Tests - Welch Allyn 53000 Service Manual

18 Functional verification
2. Press
3. Wait for the pump to start and stop.
4. Press
5. Wait for the pump to start and stop.
6. Bleed the pressure to 0 by opening the relief valve on the bulb.
7. Close the relief valve on the bulb.
8. Have a timer ready.
9. Press
manometer.
10. As soon as the manometer reads 5 mmHg (0.67 kPa), start the timer.
11. When the manometer reaches 250 mmHg (33.3 kPa), stop the timer.
12. Verify that the elapsed time
To test deflation
1. If the pressure has dropped more than 10 mmHg, use the pump bulb to raise it to 300
mmHg ± 5 mmHg.
2. While the pressure is still at approximately 300 mmHg (as shown by the manometer
and the SYS window), press
timer.
3. After 10 seconds, verify that the manometer reads less than 15 mmHg.
If you are doing the NIBP overpressure test, skip to
on page 18.
4. Disconnect the hose from the monitor.
Overpressure tests (optional)
Note
These tests demonstrate that:
•
•
To verify maximum allowable cuff pressure for NIBP version 3.20.00
1. Assemble one of the test setups illustrated on
simulator.
once to select 80 mmHg (10.7 kPa).
once to select 150 mmHg (20 kPa).
once to select 300 mmHg (40 kPa), and immediately observe the
Redundant circuitry in the VSM 300 series monitor guarantees that the blood-
pressure cuff cannot overinflate.
The allowable cuff pressure and the overpressure cutoff are controlled by
software. A software failure (a defective PROM) would generate a checksum
error, disabling monitor operation and setting it in a safe mode.
the monitor cannot exceed the maximum allowable cuff pressure for adults (280
mmHg), pediatrics (200 mmHg), and neonates (141 mmHg)
the overpressure cutoff feature shuts down the pump and dumps pressure before
the pressure reaches 330 mmHg (44 kPa)
(step 11 minus step 10) is less than 8 seconds.
once to select 0 mmHg, and immediately start the
page
Welch Allyn VSM 300 Series
"Overpressure tests (optional)"
16, using an adult cuff or cuff