Welch Allyn 53 Service Manual page 20

Functional Verification Procedure
Monitor-Off Current
With the monitor powered down, verify that the current draw from the power supply is
less than 1 mA.
Power-On Self-Test
1. Power the monitor on.
If the monitor displays error E38, power the monitor off and then power it on
again.
2. Verify that the start-up tone (double beep) is audible.
3. Verify that all front-panel lights (background indicators, LCD pixels, and LED segments
and periods) come on in the proper order: left, center, and right.
Initialization/Idle Mode Current
If your monitor is configured without the temperature option and without the
SpO option, skip these steps and proceed to
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1. If the temperature option is present:
a. Verify that the temperature probe is in the probe well.
b. Set the temperature mode to MONITOR.
c. Remove the temperature probe from the probe well.
d. Verify that the temperature reading appears within 4 seconds.
e. Do not return the probe to the probe well.
2. If the SpO option is present:
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a. Verify that the SpO
b. Verify that the current draw from the bench power supply is less than 800 mA.
3. Disconnect the SpO
4. Insert the temperature probe (if the monitor is so equipped) into the probe well.
Service Manual
sensor cable is connected to the monitor.
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sensor (if equipped).
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Baseline Current
20
Functional Verification
Draw.
Vital Signs Monitor Series 300