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3-16 250cx Series Maternal/Fetal Monitor Revision C

2036947-001

Installation: Service Mode Screens

Paper Volume

This field sets the volume of the paper chime. As you adjust the volume, a sample

tone sounds. You can choose from a range of 1 to 9 (1 = lowest,

9 = loudest).

HBC (Heartbeat Coincidence)

The heartbeat coincidence feature alerts you when there is the possibility that you

may be monitoring a duplicate signal. Heartbeat coincidence is indicated when any

two heartbeats have a consistent phase relationship for equal to or greater than 60%

of the detected beats for about 60 seconds; the cessation of coincidence is indicated

when the phase relationship is inconsistent for greater than 40% of the detected

beats for about 7 seconds.

When heartbeat coincidence detection is enabled, the acronym HBC appears to the

right of the FHR2 mode title.

HR Offset

This field is used to enable/disable the secondary offset feature. Use the Trim Knob

control to cycle through the available options: 10 min, On, and Off. (The factory

default setting is 10 min.)

What is it?

When monitoring dual heart rates using US/US2 or FECG/US, overlapping traces

may be difficult to interpret. All 250cx Series Monitors provide a +20 bpm shift for

the secondary fetal heart rate trend to alleviate this problem. When using US/US2 or

FECG/US2, and the US2 trace is shifted +20 bpm, the symbol prints on

the upper portion of the top grid every 4.5 cm. When using US/FECG, and the US

trace is shifted +20 bpm, the symbol prints on the upper portion of the top

grid every 4.5 cm. In both cases, an arrow (→) and a vertical dashed line are printed

to draw attention to the start of the shifted trend.

10 min

The heart rate offset mode is enabled with an auto-revert feature. If the trace is

shifted by the user, the heart rate will revert back to the normal (unshifted) level

after 10 minutes.

The heart rate offset mode is enabled. If the user shifts a trace, the trace will remain

shifted until the user manually sets the trace back to normal (unshifted level).

Off

The heart rate offset mode is disabled. The user cannot shift traces.

NOTE: Refer to the operator’s manual for information about activating the heart

rate offset mode.

Other manuals for GE Corometrics 250cx Series

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