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MAINTENANCE
PROTECTIVE EARTH RESISTANCE TESTING
CAUTION:
The
A.T.S.
4000TS System must meet the protective earth resistance requirements before
performing any additional electrical safety checks.
The protective earth resistance measurement should be conducted with the power cord attached to appliance inlet.
The test equipment used must be able to deliver at least 200mA into 500m
Ω
. The open circuit voltage shall not
exceed 24V. Consult the test equipment manufacturer to ensure these specifi cations are met. Measure the protective
earth resistance between the protective earth pin (ground pin) of the power cord and the exposed aluminum chassis
at the back of the device. The resistance reading should not exceed 300m
Ω
.
The integrity of the earth conductor of the power cord should be performed during normal maintenance intervals.
During the protective earth resistance testing, the power cord should be fl exed along its entire length. If during fl exing,
changes in resistance are observed, the power cord’s protective earth conductor is presumed to be damaged and the
power cord should be immediately replaced.
EARTH (EQUIPMENT) LEAKAGE CURRENT TESTING
The earth (equipment) leakage current is the recommended leakage current test. The applied parts of the
A.T.S.
4000TS are electrically insulated from the user/patient and are constructed from a non-conductive material. The
maximum allowable leakage current is 500
μ
A in a single fault condition.
INSULATION RESISTANCE TESTING
CAUTION:
The
A.T.S.
4000TS System must be disconnected from supply mains when measuring the
insulation resistance.
The insulation resistance testing is conducted by measuring the Mains Part to the Protective Earth ground. The test
equipment used shall be capable of performing the measurements with 500VDC. The insulation resistance will be
a very high level since the insulation is intended to provide no means for electrical conductivity. Therefore, values
>50M
Ω
will be considered acceptable reference value. Measurements that show a signifi cant decrease from the
previous measured value indicates a problem.
BACKUP BATTERY SERVICE
The
A.T.S.
4000TS System is equipped with a Lithium Ion backup battery. The battery is designed to last for years
when properly maintained. The system has a built-in battery charger that maintains the battery power as long as ~ AC
Power Mains is present. Continuous cycles of deep discharge and/or storage in a high temperature environment will
shorten the life of the battery. Infrequent short-term use of the battery and storage in a room temperature environment
will result in maximum life. It is recommended that the battery in the
A.T.S.
4000TS Tourniquet System be replaced
whenever the battery health has reached 50% as indicated in the UNIT INFO function in the SERVICE feature.
CAUTION:
If the
A.T.S.
4000TS System is not expected to be used for an extended period of time (>90 days),
the battery should be removed and stored.
The battery may be replaced or removed for storage by removing the battery compartment cover. The following
instructions describe the battery replacement:
1
Remove the two battery compartment cover screws located at the back of the device.
2
With the screws removed, the battery can be accessed. Allow the battery to slide out, but continue to hold it from
falling.