Sentec SDM - Routine Checks

Sentec AG, Ringstrasse 39, CH-4106 Therwil, Switzerland, www.sentec.com
HB-010103-e Date of release: 01/2022
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3.1 Routine Checks
The Isolation Transformer shall be electrically tested at least every 6 months by the homecare provider’s
instructed personnel.
Visual Inspection:
The Isolation transformer shall be visually inspected (mandatory).
• Visual inspection according to IEC 62353
• Visual inspection of integrity of the cable isolation
• Visual inspection of integrity of circuit breakers
Electrical testing:
The Isolation transformer shall be tested according to IEC 62353 (mandatory); altered limits shall be
applied where mentioned below.
• Measuring of protective earth resistance with 25 A (recommended current for measurement).
Measure resistance between primary protective earth (C14 plug) and secondary protective
earth (C13 plug).
The resistance shall not exceed 100 mΩ.
• Measuring of the insulation resistance with 500V DC. Primary live & neutral shortened as well
as secondary live & neutral shortened.
Measure:
- primary vs. secondary
- primary vs. protective earth
- secondary vs. protective earth
The insulation resistance shall not be below 100 MΩ.
• Earth leakage currents:
Device under test must be in normal operating condition. The current shall be measured with
the mains polarity normal and reversed.
Measure current from secondary (live and neutral separately) to protective earth through the
leakage current measuring device.
The leakage currents shall not exceed 100 µA.
Functional Test
The Isolation transformer shall be tested according to IEC 62353 in combination with the Sentec
Digital Monitor (mandatory).
3.2 Cleaning/Disinfection
For cleaning and/or disinfecting the SDM, the TC Sensors and the Digital Sensor Adapter Cable, please refer to
www.sentec.com/ifu
.
For cleaning the Isolation Transformer, use a dry or damp cloth. For disinfection, use a 70% isopropanol
moistened wipe.
Note: Instructed personnel/home care providers must clean and if necessary, disinfect the SDM, the TC
Sensors, the Digital Adapter Cable and the Isolation Transformer between uses on different patients.