Aspect BIS VISTA Spezifikationen PDF herunterladen (Seite 47)

SECTION 6 PREVENTIVE MAINTENANCE

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6-7

user of the equipment. However, as stated in the operating manual, an enclosure leakage

current test should be performed on the exposed metal parts and should be checked

periodically to ensure that the integrity of the equipment’s insulation system is maintained.

The leakage current test should include measurement of ground wire leakage, enclosure

leakage, and patient leakage.

Ground wire leakage typically can be performed automatically by connecting the A/C power

cord of the BIS VISTA Monitor into a safety tester. The enclosure leakage may be measured

by any safety test equipment that is capable of connecting to isolated conductive parts and

measuring the current from those parts to earth. The patient connection terminals of many

safety testers can be used for this purpose. The patient leakage current of the BISx can be

measured by connecting the patient connection terminals of a safety tester to a Sensor

Simulator that is connected to the PIC.

To check BISx patient isolation:

1. Connect the Sensor Simulator to the PIC in place of a sensor. (See Section 10.2

“Sensor Simulator P/N 186-0137”.)

2. Short the two circular terminals at the end of the simulator using conventional

methods such as jumpers or alligator clips. Wire attached with screws will work also.

3. Connect the test lead to the shorted terminals. Make sure that you are not touching

the simulator beyond this point.

4. Proceed to test instrument for leakage current as per established facility protocols

and procedures for safety testing of medical devices.

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Aspect BIS VISTA Spezifikationen Seite 47