User Manual for Vital Signs Monitor
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Pressure 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 standard pressure meter as the reference
equipment like a mercury pressure meter
Figure 3.5 Connection of Pressure calibration fixture
Mode 1: 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:
Adult
240mmHg
Child
200mmHg
Neonate
120mmHg
Table A
During the inflation, the Monitor will close the deflating valve, and the pressure value will be shown
during the process. If there is no manual deflation operation, the pressure will persist until deflation
by manual operation, so it is necessary to use a manual valve for doing adequate deflation in several
steps to verify the pressure accuracy in the full scale of measurement range.
Mode 2: No automatic inflation by Monitor during the pressure accuracy verification.
Increase the pressure manually by the pumping balloon, and the verification can be done by applying
different pressure value manually. If the increased pressure exceeds the given limit as shown in table
B, the Monitor will deflate automatically because of over-pressure protection.
