Hardware and Software Tests
Performance Verification 15
indicates zero or is blank. The pulse bar can occasionally indicate a step change
as the monitor is in the pulse search mode.
5. Move the modulation switch on the SRC-2 to LOW.
6. Verify the following monitor reaction:
a. The pulse bar begins to track the artificial pulse signal from the SRC-2.
b. Initially, zero is displayed in the SpO
2
frame, or it is blank.
c. After about 10 to 20 seconds, the monitor displays saturation and heart rate
as specified by the tester. Verify that the values are within the following
tolerances:
Oxygen Saturation Range 79% to 83%
Heart Rate Range 35 to 41 bpm
d. The audible alarm sounds and both the SpO
2
% and HEART RATE displays
flash, indicating both parameters have violated the default alarm limits.
e. The heart rate tone is heard. For this test, the user should set the heart rate
tone source to SpO
2
from the Heart Rate Menu.
7. Press the ALARM SILENCE button on the front panel of the monitor.
The audible alarm is temporarily silenced.
8. Verify the following:
a. The audible alarm remains silenced.
b. The slashed bell icon appears in each numeric frame on the display.
c. The SpO
2
% and HEART RATE displays continue flashing.
d. The heart rate tone remains audible.
e. The audible alarm returns in approximately 60 seconds.
Heart Rate Tone
Volume Control
1. Connect the SRC-2 pulse oximeter tester to the M4787A sensor cable and
connect the cable to the monitor.
2. Set SRC-2 as follows:
SWITCH
POSITION
A1 A3
RATE 38 38
LIGHT LOW LOW
MODULATION LOW OFF
RCAL/MODE RCAL 63/LOCAL RCAL 63/LOCAL
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