Covidien Nellcor GR101704, Service Manual

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Modification and Testing
10-22 Service Manual
6.
Confirm the output voltage is +1.0 ± 0.025 VDC, verifying the analog SpO
2
func-
tion.
7.
Leave the negative lead connected to pin 10 and verify 1.0 ± 0.025 VDC on pins
13 and 14, verifying BPM and pleth functions.
8.
Disconnect the voltmeter.
10.6.3
Overall Performance Check
The following tests provide an overall performance check of the system.
•
LED Excitation Test, page 10-22
•
Operation with a Live Subject, page 10-23

Note:
Performance check tests require a DOC-10, Nellcor™ Adult SpO
2
Sensor (MAX-A) and
Reusable Nellcor™ Adult SpO
2
Sensor (DS-100A) sensor.
LED Excitation Test
The LED Excitation Test utilizes normal system components to test circuit oper-
ation. Use a Max-A sensor to examine LED intensity control. The test uses the
red sensor LED to verify intensity modulation controlled by the LED intensity
control circuit.
To test the circuit operation
1.
Connect a DOC-10 interface cable to the sensor port.
2.
Connect a Max-A pulse oximetry sensor to the interface cable.
3.
Turn on the monitoring system by pressing the POWER ON key.
4.
Leave the Max-A sensor open with the LEDs and photo detector visible.
5.
Verify the Max-A optical sensor LED is brightly lit.
6.
Slowly move the Max-A optical sensor LED in proximity to the photo detector
element on the opposing side of the clip, slowly closing the sensor.
7.
Verify the LED intensity decreases as the LED approaches the optical sensor.
8.
Open the Max-A sensor and notice the LED intensity increases.