METRON QA-1290, User & Service Manual, Page: 31 / 65

5. Leak, Manometer, and Over-Pressure
Cut-off Testing
This chapter describes step-by-step procedures for conducting QA-
1290 Leak and Over-Pressure Cut-off Tests.
The Leak Test is used to detect any leakage in the cuff, hose or con-
nections within the monitor. For this test the QA-1290 pumps up a
pressure and then measures the air leakage over time. There should
be no leakage. However, if any exists, then it should be minimal (less
than 1 mmHg per minute).
The Over Pressure Cut-off Test is used for testing the blood pressure
monitor’s security valve. Monitors have these valves to release pres-
sure if it rises above a certain value, thus protecting the patient
against too high a pressure in the event of a monitor malfunction.
QA-1290 increases the pressure to a predefined value. If the value
exceeds the monitor’s release pressure, the monitor will release. QA-
1290 will then indicate that the security valve is functioning correctly
by indicating “OK”. If the pressure is not released before the prede-
fined pressure level is reached, QA-1290 will display an error mes-
sage.
5.1 Leak Test
1. From Main Menu Screen 1 press Leak Test (F6) . This advances
you to the Leak Test Screen. .
Equipment Code : ......................> F7
Leak Test .............................> F6
BP Test ...............................> F5
MORE SET UP
F1 F2 F3 F4
Manometer: 0 mmHg Peak: 0 ZERO PR.> F7
Drop : 0 mmHg Time:00:00 RS PEAK.> F6
Leak Rate: 0 mmHg/min PRINT ..> F5
RESTART INFLATE SET UP MAIN MENU
F1 F2 F3 F4
5-1