Directed Audio 6550 Service Manual download pdf (Page 50)

Electronic Tests

Accuracy Test

Model 515B/C Service Manual Rev. 01

14. Set the SIG ATTEN to 1, verify that finger sensor icon and the alert bar flash (probe off

patient indication).

15. Press and hold the RED button on the TB500B, verify “Err” appears in the saturation

display, and “-7-” appears in the pulse rate display. Release the button.

16. Press and hold the INFRARED button on the TB500B, verify “Err” appears in the

saturation display, and “-7-” appears in the pulse rate display. Release the button.

17. Power down the board by pressing .

18. Disconnect the power supply at J404 on the main board. Set an external DC supply to

+13.8 VDC. Attach the supply to J404, observe polarity (pin 3 is +, pin 4 is -).

19. Turn the board on by pressing . After the power up sequence check that the

battery icon is green.

20. Adjust the external supply between 11.06 to 11.45 volts, verify the battery icon is now

orange.

21. Adjust the external supply between 11.00 to 10.45 volts, verify the battery icon is

flashing red.

9.2

Accuracy Test

The accuracy tests verifies the performance accuracy of the Model 515B/C Pulse Oximeter. This

test uses the Model TB500B Sensor Simulator (available from Novametrix Service Dept.). This

is the same device used by the factory technicians to calibrate the monitor prior to shipping. The

TB500B is an updated version of the TB500A Test Box. Owners of the TB500A should contact

Novametrix Service Department for details on upgrading to the TB500B. Note that the

TB500A, used in conjunction with the 5453-00 adapter cable may be substituted for the

TB500B in most parts of this test.

9.2.1

Equipment Required

• AC line cord (supplied with unit) PN: 600026

• TB500B Sensor Simulator (or TB500A, see note above) PN: 5530-00

9.2.2

Test

1. Attach the line cord to the monitor. Set the rear panel power switch ON “|”. Check that

the front panel icon is green.

2. Do not connect any sensor or the TB500B Sensor Simulator at this time.

3. Press the key to turn the monitor on.

A series of audible tones will occur.

62 3 67-71 60-64

62 7 N/A N/A

72 7 74-80 68-76

82 7 80-88 78-86

92 7 88-96 88-96

100 7 98-100 98-100

SAT.

SETTING

SIGNAL

ATTEN.

Monitor’s SpO

display

TB500A TB500B

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 73 74

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Directed Audio 6550 Service Manual Page 50

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