BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-19
Output Performance
Tools required:
Multimeter
1. Connect the signal output end of the connecting cables of the CCO/SvO
2
module to the oscilloscope.
2. Select CCO Setup → Signal Output Setup and then select Simulated High Value from the pop-up menu. Check
that the amplitude of electrical level at the signal output port of ECG, MAP, CVP and SpO
2
are 5±0.015 V, 5±0.25 V,
5±0.25 V and 10±0.5 V respectively.
3.4.14 NMT Tests
Performance Test
Method 1:
Tools required:
Resistance box
Multimeter
1. Set the resistance value to 1kOhm. Connect the stimulation electrodes to the two wiring terminals.
2. Set the multimeter to operate in DC mode. Connect the multimeter sensors to the NMT stimulation electrodes,
making sure that the sensor and electrode connected have the same polarity.
3. Insert the NMT module into the module rack of the monitor. Select the NMT parameter area of the monitor to
access the NMT Setup menu. Set the Stimulation Current to Supra(60mA). Set the Pulse Width to 300μs. Perform
a PTC measurement.
4. Check the voltage change detected by the multimeter and verify normal output of NMT stimulation.
Method 2:
Tools required:
Resistance box (0~9999.9 Ω)
Oscilloscope (Agilent DS0-X3014A)
1. Set resistance box to 1kOhm, connect stimulation electrodes to the resistance box.
2. Insert the NMT module to monitor. Set [Stimulation current] to [Supra (35mA)], [Pulse width] to 200μs. Select [ST
Mode] in NMT setup menu to start a ST measure.
3. Measure the voltage wave of the resistance box by oscilloscope, verify the pulse width is range from 180 to 220us,
and calculate the Stimulation Current according stimulation voltage should be range from 33 to 37mA.
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