Nellcor OxiMax N 5500 Service Manual page 24

3.3.5 Measurement Parameter Operation Tests
3.3.5.1 ECG Operation with an ECG Simulator
1. Press Power On/Off switch to turn monitor on.
2. Connect ECG leads to appropriate jacks on ECG simulator.
3. Connect leads to MDEC ECG cable.
4. Connect MDEC to ECG input port on N5500.
5. Set ECG simulator as follows:
6. After normal power-up sequence, verify the following monitor reactions:
a.
b.
7. Increase heart rate setting on ECG simulator to 240 bpm.
a.
b.
8. Decrease heart rate setting on ECG simulator to 120 bpm.
a.
9. Disconnect LL lead from ECG simulator.
a.
b.
c.
l Heart rate: 30 bpm
l Amplitude: 1 millivolt
l Lead select: II
l Normal sinus rhythm
l Adult mode
After about 15 seconds, monitor displays a heart rate of 30 ±3 bpm.
Verify audible alarm will sound, "Low heart rate limits violated" message will
display and heart rate display will flash, indicating heart rate is below default
low alarm limit (medium priority alarm).
After about 15 seconds, verify monitor displays heart rate of 240 ±3 bpm.
Verify audible alarm will sound, "High heart rate limits violated" message will
display and heart rate display will flash, indicating heart rate is above default
high alarm limit (medium priority alarm).
After about 15 seconds, verify monitor displays heart rate of 120 ±3 bpm.
Verify "ECG Leads Off" alarm message appears, three dashes are displayed in
HR(heart rate) display, and low priority audible alarm sounds.
Reconnect LL lead to ECG simulator. Verify "ECG Leads Off" alarm message
no longer appears and audible alarm is silenced.
Repeat this test for LA and RA leads.
N5500 Service Manual
Performance Verification
17