3-20 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
Sensor Check
Tools required: None.
1. Connect the patient monitor, NMT module, and NMT accessories.
2. Select Main Menu → Maintenance → enter the required password → Module → NMT.
3. Follow the on-screen instructions to check the NMT sensor.
If sensor check completes successfully, the message Test passed. The function of NMT sensor is OK is displayed,
indicating a functional sensor. If the check fails, check whether the sensor is placed correctly as instructed, and
perform the sensor check again.
NOTE
Stop NMT measurement or calibration before starting NMT sensor check.
Avoid forcefully striking the sensor.
3.5 Nurse Call Relay Performance Test
Tools required: Multimeter
1. Connect the nurse call cable to the Nurse Call Connector of the patient monitor.
2. Enter Demo mode. Then, select Main Menu → Maintenance >> → enter the required password → Alarm to
access the Nurse Call setup menu.
3. In Nurse Call menu, select all options of Alarm Priority and Alarm Type. and set Contact Type to Normally Open.
4. In Nurse Call menu, set Signal Type to Pulse. Cause the monitor to generate an alarm and verify the output are
pulses of 1s width and the relay contacts are closed (can be measured with a multimeter) when there is an alarm.
5. In Nurse Call menu, set Signal Type to Continuous. Cause the monitor to generate an alarm and verify the output
is continuous high level and the relay contacts are closed (can be measured with a multimeter) when there is an
alarm.
3.6 Analog Output Performance Test
Tools required:
Patient simulator
Oscilloscope
1. Connect the patient simulator to the monitor using an ECG or IBP cable and connect the oscilloscope to the
Auxiliary Output Connector of the MPM module of the patient monitor.
2. Verify that the waves displayed on the oscilloscope are identical with those displayed on the monitor.
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