Operation Manual
Medical Test Supply    www.medicaltestsupply.com 
18
Chapter18   Error Message 
Error message will be displayed in the screen if there is something wrong when measuring. The 
causes and solutions are shown as follows: 
Error Message  Causes  Solutions 
Self-test failure 
System failure 
Function abnormal  Please contact us 
Loose cuff 
Cuff is not connected 
correctly. 
Correctly connect cuff (refer to 8 page) 
Air leakage  Cuff plug fall off 
Make sure the cuff plug is securely 
inserted in the windpipe (refer to 8 page) 
Air pressure error  Air pressure error  Refer to the troubleshooting 
Weak signal 
The pulse signal is too weak 
or the cuff is loose. 
Correctly connect cuff (refer to 8 page) 
overpressure  Cuff is blocked or squeezed  Correctly connect cuff (refer to 8 page) 
Excessive movement 
Over range 
Saturated signal   
The signal extent is too big 
owing to the arm or body 
moving or other reasons when 
measuring 
Keep arm, body still, measure again 
Time out  It takes too much time 










