11:2
Electrical Safety Inspections for AK-machines
HCEN12190 Rev 05.2006
1
General information
To ensure proper operation, a qualified service technician must per-
form an Electrical Safety Inspection (ESI) of the AK-machine at reg-
ular intervals. The information needed to perform ESI is provided in
this manual.
Included in the ESI procedures are checks to verify normal machine
operation. Should the machine fail to pass any of these sub-tests, repair
or calibration might be needed, then repeat the tests until the specifica-
tions are met.
Following sub-tests are included in the ESI of the AK-machines:
- Visual inspection
- PET - Protective earth test
- ELT - Earth leakage current test
- PLT - Patient leakage current test
During the visual inspection of the equipment, the service engineer
shall look for potetial faults related to the electrical safety of the
machine.
The purpose of the PET test is to verify that the protective earthed parts
of the machine are properly connected to protective earth, providing a
safe low electrical potential on these in case of insulation failure.
The purposes of the ELT/PLT tests are to verify that non-functional
leakage currents to operator and patient are within safe limits.
ESI should be performed at every maintenance service (Base-service)
but also after replacements of some components in the AK-machine
according to the Service Manual, Chapter Replacements.
When performing the ESI, which requires access to the interior of the
machine, you must have proper electrostatic safety devices (i.e. wrist
grounding straps or grounding mats) in place to prevent damage to
electrostatic sensitive components within the machine.
During repair of any of the parts in the flow path, special care should
be taken and a good hygiene should be kept.
Checklists for each sub-test are included in the end of this manual. The
purpose of these checklists is to record the work done and to trend the
readings from the ELT/PLT- tests.
Содержание AK 95
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Страница 181: ...HCEN9094Rev 10 2005 7 13 Heater Flow guard 3 9 1 2 10 4 8 7 11 12 13 5 6 3 ...
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Страница 189: ...HCEN9094Rev 10 2005 Protective Protective 7 17 Boards 7 1 2 9 6 5 4 3 8 ...
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Страница 195: ...HCEN9094Rev 10 2005 T12AH 250AC BACH BACO HALT 7 20 AC DC 2 4 5 1 6 7 8 9 3 ...
Страница 203: ...HCEN9094Rev 10 2005 7 24 Front MM95 18 8 4 8 5 7 20 15 14 6 2 11 21 19 10 9 12 15 3 17 15 13 13 16 14 17 12 1 ...
Страница 205: ...HCEN9094Rev 10 2005 7 25 MM I O board 3 2 9 4 6 7 8 5 1 10 ...
Страница 207: ...HCEN9094Rev 10 2005 7 26 Feeding pumps 15 18 14 16 10 7 10 19 2 6 3 4 17 5 7 12 20 13 9 11 14 18 8 ...
Страница 215: ...HCEN9094Rev 10 2005 7 30 UFD Option 4 5 7 17 12 9 6 18 1 6 11 16 8 10 6 13 14 3 2 6 19 15 ...
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Страница 219: ...HCEN9094Rev 10 2005 7 32 Boards and Cablings EN1107 10 Step driver board ...
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Страница 229: ...AK 95 AK95SHCEN12078Rev 10 2005 10 1 Replacements Replacements Replacement matrix 2 Changeactions 4 FM Flow Diagram 5 ...
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