25-5 
 
25.5.2 NIBP Accuracy Test 
The NIBP accuracy test is required at least once a year or when you doubt the measured 
NIBP. 
 
Tools required:   
  T-piece connector 
  Approprating tubing 
  Balloon pump 
  Metal Vessel (volume 500±25 ml) 
  Reference manometer (calibrated with accuracy higher than 0.75 mmHg) 
 
Follow this procedure to perform the accuracy test:   
1.  Connect the equipment as shown. 
 
2.  Before inflation, check that the reading of the manometer should be 0. If not, open the 
valve of the balloon pump to let the whole airway open to the atmosphere. Close the 
valve of the balloon pump after the reading is 0. 
3. Select [Main Menu][Maintenance >>]ė[User Maintenance >>]. Enter the required 
password and then select [OK]. 
4. Select [Module Maintenance >>][NIBP Accuracy Test]. 
5.  Check the manometer values and the monitor values. Both should be 0mmHg. 
6.  Raise the pressure in the rigid vessel to 50 mmHg with the balloon pump. Then, wait for 
10 seconds until the measured values become stable. 
7.  Compare the manometer values with the monitor values. The difference should be 3 
mmHg. If it is greater than 3 mmHg, contact your service personnel. 
8.  Raise the pressure in the rigid vessel to 200 mmHg with the balloon pump. Then, wait 
for 10 seconds until the measured values become stable and repeat step 6. 
 
Monitor 
Connector for 
NIBP cuff 
Manometer
Tubing 
Balloon pump 
Metal vessel