Datex-Ohmeda F-LM1, Technical Reference Manual

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Service menu
5.1.3 NIBP pulse valve menu
Start test
Start test is for starting and Stop test is for stopping the test.
Set valve
Set Valve
lets you adjust the opening of the pulse valve.
NOTE:
Parameter values in Service Data are for reference only.
Pulse valve data
See NIBP service menu in chapter
5.1
for information on general items Pressure, Zero, Protect
handle, Calibr. prot., +12 V power, AD0 to AD7 as well as Timeouts etc.
Pulse valve checking
Wrap an adult cuff around a pipe and connect the cuff to the monitor. Select the
Start test
and
push the ComWheel. The pressure rises beyond 240 mmHg and stops. The pulse valve opens. The
module counts the time it takes for the pressure to go down from 240 mmHg to 50 mmHg and
displays it. The test can be manually stopped by selecting
Stop test .
The valve can be adjusted between 0 and 255 (0 for fully closed and 255 for fully open). First
select Set Valve and push the ComWheel. See the pulse valve value and adjust it by turning the
ComWheel. Then push the ComWheel to confirm the value.
The " Interval 240 mmHg -> 50 mmHg " time should be less than 60 seconds when the valve is
'150' and less than 10 when fully opened (255). When fully closed (0), the system should be
airtight and the pressure does not drop. Depending on an individual, the pulse valve may remain
closed up to approx. value 100.
If the measured time deviates much from those above, then the pulse valve or its tubes are faulty.
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