Leak Test (7); Over Pressure Test (8A, 8B, 8C) - Datascope Accutorr Plus Service Manual

A fixed volume of 700 cc is pumped to approximately 20 mmHg over the specified start
pressure (see table 7-6), then vented to atmosphere through one of two different valves.
During the test, the MAP display indicates the real-time system pressure and the
Timer/Temperature display indicates the elapsed time in seconds. When the stop
pressure is reached, the MAP display is blanked and the elapsed time displays the current
reading. Pressing the Deflate key ends the test and deflates the chamber. Pressing and
holding the Deflate key for three seconds clears the MAP display and exits the test. Each
test is uniquely identified in the Patient Bed Letter Display as described in Table 7-6.
The table identifies each test, the corresponding start and stop pressures and required
completion times.
Test Description Start
Pressure
(mmHg)
Linear Bleed Valve 180
Test
Dump Valve Test 250
Table 7-6
7.5.8

Leak Test (7)

Select Room Number 7 and press the NIBP Start key to activate the test.
This test evaluates the ability of the system to maintain a steady pressure.
A fixed volume is pumped up to an initial differential pressure of approximately 250
mmHg and monitored for a fixed period of time. While the pump is operational, peak
pressure is displayed in the MAP display. When the target pump pressure is reached, the
peak pressure is frozen in the MAP display during a five second dwell. During leakage
measurement, the current pressure leakage is displayed in the MAP display and the
elapsed test time (in seconds) is displayed in the Temperature/Time/Interval display.
After the leakage measurement time has elapsed, the MAP and
Temperature/Time/Interval displays are blanked and a "00" (Pass) or "FF" (Fail) will be
displayed in the Bed window. Pressing the Deflate key at any time during the test causes
the NIBP module to open all valves and ends the test. The maximum pressure drop shall
be no more than 10 mmHg in any 90 second period when connected to a 700 cc volume.
Pressing the Deflate key ends the test and deflates the chamber.
Pressing and holding the Deflate key for three seconds clears the MAP display and exits
the test.
7.5.9

Over Pressure Test (8a, 8b, 8c)

Select Room Number and Bed Letter per table 7-7. Press the NIBP Start key to activate
the test.
This test evaluates the ability of the system to prevent an over pressure condition,
independent of software control, for each of 3 over pressure settings. A fixed volume of
700 cc's is pumped to a target pressure that is above the maximum over pressure specified
Accutorr Plus Service Manual
Chapter 7 - Calibration
Stop Time Test
Pressure (Sec.) Room
(mmHg) Number
60 15-25
seconds
20 14 seconds
max.
Sub Test Patient
Bed Letter
6 a
6 b
Revised 9/20/07
7-9