GE Corometrics 250cx Series, Service Manual, Page: 62 / 252

3-8 250cx Series Maternal/Fetal Monitor Revision C
2036947-001
Installation: Self-Test Routine
Battery-Backed RAM Status
Whenever you turn off a 250cx Series Monitor, a battery provides power to the
RAM (random access memory) that stores information such as time, date, default
settings, etc.
Low Battery Icon
The icon shown above will appear in the upper right-hand section of the monitor
under the following circumstances.
NOTE:
It is very important to set the time and date prior to initial operation of the
monitor and during daylight-saving time changes. A long-lasting battery
maintains the settings even when the monitor is unplugged from AC
power. Information on setting the time and date is found in the
General
Setup
screen section in Chapter 4 of the Corometrics 250cx Series Monitor
Operator’s Manual.
Recorder Test The message TEST: ARE ALL DOTS PRINTED? prints followed by two vertical lines which should
appear continuous. Discontinuous lines may be an indication of damaged printhead elements if gaps
occur in the same place on both lines.
Counting Test After the recorder test, the display returns to the main screen. The software generates a 120 bpm rate
in the FHR1 area, a 180 bpm rate in the FHR2 area, and both mode titles display Test.
Uterine Activity The monitor adds 50 mmHg to the previously displayed value in the UA display area; the mode title
displays Test.
Table 7. Monitor Self-Test Routines
Test Routine Description
Table 8. Battery-Backed RAM Status
Icon Appearance Reason Solution
Icon appears and then
disappears after power
cycle. Data corruption. Your monitor has reverted to
factory settings. Access setup screens and configure last-used
settings.
Icon appears after most
or all power cycles. Battery requires service. Call GE Service to report.