ØPressure Accuracy Verification
Pressure Accuracy Verification is a function to inspect the accuracy of pressure measurement by the NIBP module
inside the device. Technician or equipment manager should do pressure accuracy verification every half year or
year in order to check if the pressure measurement still conforms to the requirement of product performance. If the
deviation is beyond the declared specification, it is permitted to return it to factory for repair or calibration.
Before verification, please connect the monitor to a precise pressure meter such as a mercury pressure mete, which
is used as the reference meter.
Figure 3.8 Connection of Pressure calibration fixture
Mode 1: Automatic inflation
The inflation can be activated by Monitor so the pressure will increase automatically until it exceeds the limit value
specified in table A. This pressure limit value depends on the patient type selection as shown in table A:
Table A
During inflation, the Monitor will close the deflation valve, and pressure reading will be shown as inflation
takes place. If there is no manual deflation operation, the pressure will persist until deflation by the manual
valve. It is necessary to deflate in several steps to verify the pressure accuracy at points across the full scale
measurement range.
Mode 2: Manual inflation.
Increase the pressure manually by the inflation balloon, and the verification can be done by applying different
pressures manually. If the increased pressure exceeds the given limit as shown in table B, the Monitor will
deflate automatically because of the over-pressure protection valve in each mode.
Table B
software
Increase the pressure manually
through the inflatable balloon
NIBP cuff with dual air tube
pressure meter
To Next Page
Loading...
