Philips Avalon CTS M2720A, Service Manual

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Testing Transducers 7 Troubleshooting
75
• There is likely to be an RF-related problem. Check for frequent mode annotations on the fetal monitor’s
recorder to confirm this. Refer to the information on RF troubleshooting in this chapter, and to the
chapter “Troubleshooting” in the
Instructions for Use .
If the problem persists, replace the transducer.
The transducers are sealed and are
NOT
repairable.
ECG Transducer Electrical Check
Carry out the elctrical check on the ECG transducer in both DECG annd MECG mode.
In DECG Mode
1
Ensure that the ECG transducer is registered to the base station, is showing a bed label and has a good
RF link to the base station.
2
Attach the DECG adapter cable to the red color-coded socket on the transducer.
3 For Series 50 monitors: Ensure that the Cardio 1/Combi channel display on the fetal monitor shows
nop
with the adapter cable M1362B attached.
For Avalon FMxx monitors: Ensure that the DFHR channel display on the fetal monitor shows the
DECG LEADS OFF
INOP with the DECG adapter cable attached.
4
Take a new (sterile) Fetal Scalp Electrode, and connect it to the DECG adapter cable.
5
EITHER
Make a short between the spiral elctrode and the reference electrode with your fingers (it is best to wet
your fingers first).
CAUTION The tip of the spiral electrode is sharp. Take care not to injure your fingers.
OR
Cut off the plastic tip of the fetal scalp electrode (containing the spiral and reference electrodes) from the
end of the wires. Strip the insulation from the end of the wires, and connect them to a patient simulator.
Note—
We do not recommend the use of a specific patient simulator. The use of a patient simulator does not
allow checking the specification of the ECG-Functionality; it allows only a check of general function.
Result:
– Series 50 monitors:
nop
should disappear.
Spiral
Electrode
Reference
Electrode