Nellcor N-180, Manual

Page: 69 / 83

Section 7: Performance and Safety Tests
7-11
Switch position
Baud rate Switch 7 Switch 8
2400 Down Up
4800 Down Down
9600 Up Down
19,200 Up Up
8. Set monitor to conversation format by setting DIP switch two up.
9. At your test computer:
a. Start communication port control software.
b. Set communication software to agree with baud rate you set at
monitor.
c. Once communication is established, type letter S .
d. Verify monitor echoes letter S and then sends current saturation
value followed by a carriage return and linefeed.
SAFETY TESTS
The following safety tests are required:
• Ground integrity
• Electrical leakage
Ground Integrity
This test verifies the integrity of the power cord ground wire from the AC
plug and connection with the monitor chassis ground.
1. Set electrical safety analyzer Function to Ground Resistance Test; set
range to Milliohms.
2. Connect monitor AC plug to analyzer as recommended by analyzer
operating instructions.
3. Connect analyzer resistance input lead to grounding stud on rear panel
of monitor.
4. Verify analyzer indicates 0.150 (150 milliohms) or less.
Electrical Leakage
These tests verify the electrical leakage of the monitor. There are three tests
you must perform:
• Chassis source current
• Patient source current
• Patient sink current
Chassis Source Current
1. Set electrical safety analyzer Function to Leakage and Range to
Microamps.