Service manual

3. DIAGNOSTIC CHECK

Service Manual BSM-4100 3.31

1. Calibration (1)

The Calibration (1) Check program is not used for calibration but is used to

display the accuracy of the Pressure Sensor 1. The accuracy of the sensor changes

with the measuring pressure. The following table shows the acceptable accuracy

range of the Pressure Sensor 1 at different pressure ranges.

Pressure Range Acceptable Accuracy Range

0 - 199 mmHg +/−3 mmHg

200 - 300 mmHg +/−4 mmHg

Checking the Accuracy of Pressure Sensor 1

1. Connect the manometer and hand bulb pump to the dummy cuff using the Y-

shape connector and connect the dummy cuff to the instrument with the air

hose as shown below.

2. Touch the “SELECT” key to select item number 1.

3. Touch the “START” key to start the check.

4. Immediately start pumping the hand bulb pump. Stop pumping the hand bulb

pump when the pressure reading displayed on the NIBP Check display of the

instrument is within one of the two pressure ranges. ( 0 - 199 or 200 - 300

mmHg ).

5. Compare the pressure reading displayed on the NIBP Check display with the

pressure reading on the manometer.

6. Repeat steps 4 and 5 for a reading in the other pressure range.

If the accuracy of the pressure sensor for any of the two pressure ranges is out

of the acceptable accuracy range, replace the NIBP Measure board or

pneumatic circuit with a new one.