Nurse Call - Welch Allyn 53 Service Manual

Functional Verification

Nurse Call

Relay Verification
With reference to the drawing and table below, use an ohmmeter to check the contact
resistance at the output pins of the Nurse Call connector, while the monitor is in the alarm
state and while the monitor is out of the alarm state.
When the Nurse Call verification is done, disconnect the Nurse Call cable and turn off the
monitor.
1 (Black)
Normally Open
2 (Red) Arm
Pins
1-2
2-3
Putting the Monitor into the Alarm State
To create an alarm condition for testing the Nurse Call relay, follow these steps.
1. Press repeatedly until INTERVAL ST appears in the message display.
2. Wait for the pump to charge twice (about 10 seconds), and verify that error code C04
appears in the SYS display.
3. Verify that the Nurse Call circuit is shorted. (Refer to the table shown above.)
4. Press .
5. Verify that the Nurse Call circuit is open. (Refer to the table shown above.)
6. To exit the alarm state, press
display, and then press
Vital Signs Monitor Series 300
4 (not connected)
3 (Green)
Normally Closed
Resistance
(Alarm OFF)
> 1 MΩ
< 1 Ω
repeatedly until INTERVAL 15 appears in the message
.
Functional Verification Procedure
Resistance
(Alarm ON)
< 1 Ω
> 1 MΩ
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