CME NIKI V4 Service Manual page 46

Air Sensor Test
Prepare the pump for operation according to operation instructions pg.
Separate front and rear housing according to section 4.5. pg.52.
Set a program of 999 ml/hr and VTBI 50 ml.
Use an oscilloscope device, connect the oscilloscope's ground to the pump's ground.
Set the pump to operate at a rate of 200 ml/hr and VTBI of 30 ml.
Connect the oscilloscope to the collector of Q20 to detect the pulse from pick to pick.
The minimum level should be 3.8v. Connect U11 to ground, the frequency detected
should be smaller than 0.8v. Connect the same point (U11 P2) VCC the frequency
should be 40 Hz.
High pressure (occlusion) Alarm Test
1. Occlude the administration set. Press the RUN/HOLD key to start operation.
2. After few seconds HI PRESSURE alarm will activate.
3. Press RUN/HOLD key to silence the alarm.
4. HOLD appears on the display.
Electrical Safety Test
Test the device leakage current and ground impedance in accordance with UL 544.
Leakage current should not exceed 100 microamps. Ground impedance should be
measured on the pump's door.
If the device fails to meet these requirements, remove it from service, troubleshoot it in
accordance with section 6 and repair it in accordance with section 4.5.
NIKI V4 Operator's Manual 46
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