3-7 
2.  Raise the pressure in the rigid vessel to 250 mmHg with the balloon pump. Then, wait 
for 5 seconds to let the measured values becoming stable. 
3.  Record the current pressure value, and meanwhile use a time counter to count the time. 
Then, record the pressure value after 60s. 
4.  Compare the two pressure values and make sure the difference should not be greater 
than 6 mmHg. 
 
NIBP Calibration 
Tools required: 
  T-shape connector 
  Approprating tubing 
  Balloon pump 
  Metal Vessel with volume 500 ± 25 ml 
  Reference manometer (calibrated with accuracy equal to or better than 0.75 mmHg) 
 
Follow this procedure to perform a NIBP calibration: 
1.  Perform procedures 1 to 4 in the NIBP Accuracy Test section. 
2. Select [Main Menu]→ [Maintenance >>]→ [Factory Maintenance >>]→ enter the 
required password→ [Calibrate NIBP >>]. 
3. Set [NIBP Pressure] to 150 mmHg in the [NIBP Measurement Circuit]. Raise the 
pump pressure to 150 mmHg. After the pressure value is stabilized, select the 
[Calibrate] button to start a calibration. 
5.  Set patient category to [Adu/Ped] in the [Overpressure Protection Circuit], and raise 
the pressure to 330 mmHg. After the pressure value is stabilized, select [Calibrate] to 
start a calibration. 
6.  Set the patient category to [Neo] in the [Overpressure Protection Circuit], and raise 
the pressure to 165 mmHg. After the pressure value is stabilized, select [Calibrate] to 
start a calibration. 
 
All calibration results are displayed in the [Calibrate NIBP] menu. If the calibration fails, 
check the test system for leakage and perform another calibration.