Service manual

3. DIAGNOSTIC CHECK
3.38 Service Manual BSM-4100
6. Step Deflation
This checks the step deflation of the cuff at given pressure.
HIGH pressure: Valve 1 opens for 40 ms and Valve 2 opens for 70 ms at 250 mmHg.
The “OK” message appears if the pressure drop is 5 to 20 mmHg.
LOW pressure: Valve 1 opens for 60 ms and Valve 2 opens for 80 ms at 20 mmHg.
The “OK” message appears if the pressure drop is 1 to 10 mmHg.
Checking the Step Deflation
1. Connect the 250 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 6.
3. Touch the “START” key to start the check.
If an “ERROR” message appears, replace the NIBP Safety board or pneumatic
circuit with a new one.