Nellcor OxiMax N 5500, Руководство по обслуживанию, Страница: 20 / 101

Performance Verification
N5500 Service Manual 13
Performance
Verification, N5500
11. Set QRS volume to Off and return to the monitoring screen. Verify beeping pulse
rate tone is no longer audible.
12. Return QRS volume to a comfortable level.
3.3.4.3 LED Excitation Test
This procedure uses normal system components to test circuit operation. A Nellcor
O
XI
M
AX
oxygen transducer, model MAX-A, is used to examine LED intensity control.
The red LED is used to verify intensity modulation caused by the LED intensity control
circuit.
1. Connect the monitor to an AC power source.
2. Press the Power On/Off switch to turn the monitor on.
3. Connect DOC-10 pulse oximetry cable to the monitor.
4. Connect a MAX-A sensor to the pulse oximetry cable.
5. Leave the sensor open with the LEDs and photo detector visible.
6. After monitor completes its normal power-up sequence, verify that the sensor LED is
brightly lit.
7. Slowly move sensor LED in proximity of photodetector element of the sensor (close
the sensor slowly). Verify; as LED approaches the optical sensor, that the LED
intensity decreases.
8. Open the sensor and notice that the LED intensity increases.
9. Repeat step 7 and intensity will again decrease. This variation is an indication that
the microprocessor is in proper control of LED intensity.
10. Press the Power On/Off switch to turn the N5500 monitor off.