SECTION 6 PREVENTIVE MAINTENANCE
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6-6
storage (e.g., more than 1 month) it may be necessary to cycle (charge,
then discharge) the battery a few times to get full charge capacity. If
the BIS VISTA monitor fails to operate reliably from the battery for
approximately 45 minutes, battery replacement is required.
The BIS VISTA monitor contains an internal lithium ion battery. The
battery must be removed by a qualified service technician and
disposed of or recycled in accordance with the national laws of the
country. Contact Aspect Medical Systems, Inc. or the local distributor
for a replacement battery: Aspect part number 186-0208.
If the battery requires replacement, see Section 8.4, “Replacing the Battery”.
6.4 Checking Leakage Current
Leakage current is a primary indicator of electrical shock hazard to personnel making contact
with any exposed outer surface of the equipment. Each BIS VISTA system is carefully
checked at the factory to verify that leakage current meets the UL60601-1 and IEC60601-1
safety standards.
The BIS VISTA monitor should be checked routinely for leakage current at least
once a year. Always have the leakage current checked after a saline or blood spill, or
immediately after a major surge in the house electrical system and after every time the
monitor case has been opened. Keep in mind that liquids such as saline and Ringer’s as well
as blood are all excellent conductors of electricity. Avoid touching any part of the system
with wet hands. Always work with clean, dry hands.
WARNING!
ELECTRICAL SHOCK HAZARD: THE MANUFACTURER’S
INSPECTION OF THIS APPARATUS VERIFIED THAT THE
GROUND LEAKAGE CURRENT AND THE PATIENT SAFETY
CURRENT WERE LESS THAN THE SPECIFIED LIMITS
ESTABLISHED BY THE APPLICABLE SAFETY STANDARDS. AS
A MATTER OF SAFE PRACTICE, THE INSTITUTION SHOULD
CONDUCT PERIODIC TESTS TO VERIFY THESE CURRENTS.
WHENEVER AN EVENT SUCH AS SPILLAGE OF BLOOD OR
SOLUTIONS OCCURS, RE-TEST BEFORE FURTHER USE.
Leakage Current testing should be performed by a qualified Biomedical Engineering
Technician or authorized personnel only.
The BIS VISTA Monitoring unit does not contain a
Protective Earth Stud (GND Stud)
.
Since the exposed metal parts on the rear of the BIS VISTA Monitor (Communication serial
port and USB ports) are separated from live parts by double insulation, a ground continuity
test does not apply to these parts. The components of the BIS VISTA Monitor that are
connected to protective earth are contained within its enclosure and are not accessible to the
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