Marquette Hellige GmbH MicroSmart V 2.xx Page 55
Servicing Instructions 227 470 35 B - 97.12
8.2 Safety Analysis Test
8.2.1 General Information
The suggested Safety Analysis Test refer to the international Standard IEC 601-1.
The tests are generally performed with Safety Testers, on most of them, the measuring circuits
according IEC 601 are already implemented.
The tests which have to be performed are described generally, for the handling of your Safety
Tester follow the user manual.
The tests may be performed under normal ambient conditions of temperature, humidity and
pressure and with line voltage.
The leakage currents correspond to 110 % of rated voltage for the tested unit. Most Safety
Testers take this into account, otherwise the measured values have to be calculated.
Recommendet test equipment
- Safety Tester for measurements according IEC 601.
- Testing connector according the following description.
Testing connector for measuring patient leakage current.
For testing the ECG input a patient cable with all leads connected together is used.
8.2.2 Protective earth resistance test
The protective earth resistance test has to be performed including its power cord.
This test determins whether the device has a power ground fault.
- The protective earth resistance from power connector to any protective earth connected
exposed conductive part is measured.
- Specs. of test circuit: AC current source 50 Hz/60 Hz of at least 10 A up to 25 A with
limited output voltage of 6 V.
- If resistance is greater than 100 mOhm
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