Revision D 250 Series Maternal/Fetal Monitor 4-15
2020551-001
Maintenance: Electrical Safety Tests
Patient-to-Line Leakage for US
1. Connect an US test body to the monitor’s front panel US input. The US test
body should be an ultrasound transducer wrapped in aluminum foil.
2. Set the fixture’s Leakage switch to Line.
3. Turn ON the monitor using the monitor’s power switch.
4. Verify the following:
< 50 µA (100, 120, 220, 230, or 240 VAC monitors)
5. Record the patient-to-ground leakage for the following conditions:
Patient-to-Ground Leakage for US2
1. Connect an US test body to the monitor’s front panel US2 input. The US test
body should be an ultrasound transducer wrapped in aluminum foil.
2. Set the fixture’s Leakage switch to Patient.
3. Turn ON the monitor using the monitor’s power switch.
4. Verify the following:
< 50 µA (100, 120, 220, 230, or 240 VAC monitors)
5. Record the patient-to-ground leakage for the following conditions:
Table 4-3. Patient-to-Line Leakage Conditions for US
Neutral Ground Power (Polarity)
Closed Closed Normal
Closed Closed Reversed
Open Closed Normal
Open Closed Reversed
Table 7. Patient-to-Ground Leakage Conditions for US2
Neutral Ground Power (Polarity)
Closed Closed Normal
Closed Open Normal
Closed Open Reversed
Closed Closed Reversed
Open Closed Normal
Open Closed Reversed
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