4-12 250 Series Maternal/Fetal Monitor Revision D
2020551-001
Maintenance: Electrical Safety Tests
Patient-to-Line Leakage for ECG
1. Connect an ECG test body to the monitor’s front panel ECG input. The ECG test
body can be the assembly leakage cable.
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 IUP
1. Connect an IUP test body to the monitor’s front panel UA input. The IUP test
body can be a SensorTip transducer (wrapped in aluminum foil) or the assembly
leakage cable.
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 3. Patient-to-Line Leakage Conditions for ECG
Neutral Ground Power (Polarity)
Closed Closed Normal
Closed Closed Reversed
Open Closed Normal
Open Closed Reversed
Table 4. Patient-to-Ground Leakage Conditions for IUP
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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