Novametrix Medical Systems OXYPLETH 520A, Service Manual

Page: 66 / 133

Section 13
Accuracy Test
56
Model 520A Service Manual 5693-90-01
PRELIMINARY
13.2.4
Set the TB500B to these settings;
Power - On, Sensor Type
4
- 87xx, Signal Attenuation - 3, Saturation - 92.
13.2.5
Connect the TB500B to the Model 520A SpO
2
Input Connector.
Verify a Pulse Activity Bar appears in the Message Center.
Verify SpO
2
and Pulse Rate values appear after several “pulses”.
13.2.6
Set the Signal Attenuation to 1. Verify the Saturation and Pulse Rate
displays blank out, an alarm sounds and
PROBE OFF PATIENT
is
displayed. Set the Signal Attenuation to 3 and verify the displays and
Pulse Activity Bar return.
13.2.7
Set the Saturation to 0. Verify that after a short delay,
LOW SIGNAL
appears in the Message Center. Set the Saturation to 100 and verify the
displays and Pulse Activity Bar return.
13.2.8
Press and hold the TB500B RED push-button. Verify the monitor alarms
and displays
PROBE FAULTY RD
. Release the button.
13.2.9
Press and hold the TB500B INFRARED push-button. Verify the monitor
alarms and displays
PROBE FAULTY IR
. Release the button. Verify the
displays and Pulse Activity Bar return.
13.2.10
Press and hold both the TB500B RED and INFRARED push-buttons.
Verify the displays blank out and
CONNECT SPO2 PROBE
is displayed.
Release the buttons. Verify the displays and Pulse Activity Bar return.
13.2.11
Disconnect the TB500B from the monitor. Set the Sensor Type switch to
86xx.
5
Reconnect the simulator to the monitor. Verify the message
INSUFFICIENT LIGHT
is replaced in approximately 10 seconds by
CAN’T I.D. PROBE
, which is itself replaced later by
PROBE FAULTY
.
Disconnect the TB500B from the monitor, return the Sensor Type switch
to 87xx and then plug it back in. Verify the displays and Pulse Activity Bar
return.
13.2.12
Press and hold the
AUDIO
key until the (Audio Off) indicator
illuminates. This will keep the monitor silent for the remainder of the test.
13.2.13
Verify the displayed SpO
2
value is within the tolerances stated below for
each setting of the Signal Attenuation and Saturation switches. Verify a
Pulse Rate of 60 bpm
±
1bpm for all switch settings. (Note that alert
4. The 5453-00 Adapter Cable is used instead of the Sensor Type switch for the TB500A.
5. If using a TB500A, disconnect the Adapter Cable and plug the TB500A directly into the Model
520A. The Message Center should display “INCOMPATIBLE PROBE”. Install the Adapter Cable
between the TB500A and the Model 520A and move on to the next step.