Service manual

3. DIAGNOSTIC CHECK
Service Manual BSM-4100 3.39
7. Air Leak
This checks air leakage in the pneumatic circuit of NIBP module. In this check,
the air pressure of the dummy cuff goes up to 300 mmHg. It then compares the
pressure readings of the dummy cuff taken at 30 seconds and 90 seconds after the
pressure of the dummy cuff had reached 300 mmHg. If the pressure readings differ
by 5 mmHg or less, an “OK” message appears. If not, an “ERROR” message
appears. In this case, make sure that the cuff connector and internal air tubes are
firmly attached. If the “ERROR” message still appears, replace the NIBP Safety
board or pneumatic circuit with a new one.
Checking the Air Leak
1. Connect the 700 ml dummy cuff to the instrument with the 3.5 m air hose as
shown below.
2. Touch the “SELECT” key to select item number 7.
3. Touch the “START” key to start the check.