Novametrix Medical Systems OXYPLETH 520A, Руководство по обслуживанию

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5-Jun-01 Model 520A Service Manual
59
PRELIMINARY
14
Calibration Tests
Introduction
14.1
The Calibration Tests verify the calibration and operation of the electronic circuits
within the Model 520A Pulse Oximeter. These tests do NOT need to be performed
on a regular (preventative maintenance) basis. Perform these tests only if the
monitor fails to operate as expected and/or fails the
Functional Test on page 51 and/
or the Accuracy Test on page 55. Calibration Tests should be performed only by
qualified service personnel. The Model 520A contains static sensitive devices.
Follow proper grounding procedures when handling the internal components to
avoid damage from static discharge.
The test requires the use of the Model TB500B
1
Sensor Simulator Test Box. 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
2
Test Box.
If the monitor does not pass the Calibration Tests, remove it from use and contact
the Novametrix Service Department for repair/replacement assistance.
This procedure assumes the technician performs each step as indicated—leaving
the monitor in a known state prior to performing the next step. If steps are omitted
or performed out of order, be sure that the monitor is set to the correct state before
continuing.
Equipment Required and Test Setup
14.2
14.2.1
Model 520A to be tested
AC Mains Line Cord (supplied with monitor)
TB500B Sensor Simulator (Cat. No. 5530-00)
or TB500A Sensor Simulator and Adapter Cable 5453-00.
RS232 test fixture, PN: 5479-01
Saturation test jack, PN: 5942-00
Digital Voltmeter
Small Flat-blade screwdriver
14.2.2
With the Model 520A Off. Disconnect any line cord and sensor from the
monitor.
1. Available through the Novametrix Service Department.
2. The TB500A, used in conjunction with the Cat. No. 5453-00 Adapter Cable, may be substituted
for the TB500B in most parts of this test.