Philips Avalon CTS M2720A, Service Manual

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Safety Tests 6 Preventive Maintenance and Safety
49
Testing Alarms
Details of how to test alarms is given in the Instructions for Use .
Safety Tests
This section defines the test and inspection procedures applicable to the Avalon CTS Cordless Fetal
Transducer System. Use the tables in the following section to determine what test and inspection results
must be reported after an installation, upgrade, or repair has been carried out.

Test Blocks in Table 1 tells you when to carry out the safety tests.

Test and Inspection Matrix in Table 2 tells you how to carry out the safety tests.
WARNING Safety test requirements are set acccording to international standards, such as IEC/EN 60601-1 and IEC
60601-1-1, their national deviations, such as UL2601-1, CAN/CSA-C22.2 No. 601.1-M90 and No
601.1-S1-94, and specific local requirements.
The safety tests detailed in this chapter are derived from international standards but may not be sufficient
to meet local requirements.
3
Check the values displayed by the fetal monitor to get an overview of the condition of the entire system. The
following table specifies the signals that are generated during the test. As the mode of the ECG transducers is
unknown to the base station (as it is configured outside of the base station), an ECG transducer is always mapped
to the MECG mode. This avoids potential mode errors.
4
To stop the test, release the key.
Expected signals generated during the system test:
Test Outputs
US DECG*
(Place in
Slot 1)
TOCO
(Place in Slot 2)
ECG
Transducer is
in Slot 2
MECG*
(Place in
Slot3) Slot 1 Slot 3
Value on fetal monitor
LED display, Recorder,
OBMS-IF 190 bpm 170 bpm 200 bpm
Note: Ensure
there is no US
transducer in
slot 3 (Error
9 will appear)
Signal with 30 units
amplitude range and 20s
period duration
An IUP reading
appears on the
fetal monitor. IUP
measurements are
not currently
supported.
Disregard any
measurement you
get. 120 bpm
Fetal monitor speaker Artificial HR signal N/A N/A “click”
Test tolerance** +/- 2.5 bpm +/- 2.5 bpm +/- 10% period duration N/A +/- 2.5 bpm
*Test ECG transducers without the adapter cables attached.
**Signal is variable. Jitter should normally be /- 2.5 bpm. However, this could possibly be higher due to external
factors, such as interference or the environment. On slot 1, the jitter can be higher than on slot 3.
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