5-48 250cx Series Maternal/Fetal Monitor Revision C
2036947-001
Troubleshooting: General Troubleshooting
External Uterine Activity Troubleshooting
Table 18. External UA Troubleshooting
Problem Probable Cause Possible Solution
Tocotransducer not recording contractions.
Transducer not properly connected to
monitor.
Transducer not properly placed.
Transducer not secured to patient.
Defective transducer/cable
assembly.
No maternal contractions.
UA Reference range exceeded.
Ensure that transducer is securely
attached to monitor.
Reposition transducer.
Secure or re-apply transducer to
patient.
Replace transducer/cable
assembly.
Wait.
Loosen belts or remove transducer
from patient. Press UA Reference
button while no pressure is applied to
transducer button. Re-apply
transducer. Do not overtighten belt.
Press UA Reference button again
between contractions.
Flashing “+” sign.
Relative pressure > 100. Press the UA Reference button
between contractions.
CHECK TOCO message is shown in UA
area of the display area when the UA
Reference button is pressed.
UA Reference button pressed before
UA circuits stabilized.
UA Reference range exceeded due to
over-tightening belt.
Transducer defective.
Service required.
You must wait ten seconds following
powering on the monitor and/or
connecting to the UA connector.
Loosen belts or remove transducer
from patient. Press UA Reference
button while no pressure is applied to
transducer button. Re-apply
transducer. Do not overtighten belt.
Press UA Reference button again
between contractions.
Replace transducer.
Call Biomedical Engineering
Department.
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