11-16 250cx Series Maternal/Fetal Monitor Revision C
2036946-001
Recorder Modes: Strip Chart Paper
Strip Chart Paper
Instructions for loading the strip chart paper are provided in Chapter 4, “Setup
Procedures”. Two kinds of strip chart paper are available from GE.
Z-Fold Chart Paper with Pre-Printed 30–240 bpm Heart Rate Scale (Refer to
Figure on Page 11-17.)
Z-Fold Chart Paper with Pre-Printed 50–210 bpm Heart Rate Scale (Refer to
Figure on Page 11-18.)
In the United States of America, the most common grid is the 30-240 bpm scale with
the recorder speed set at 3 cm/min. As shown in Figure on Page 11-17, a dark line is
printed every 3 cm, which represents 1 minute in time at a speed of 3 cm/min.
In other countries, the most common grid may be the 50–210 bpm scale with the
recorder speed set at 1 cm/min. As shown in Figure on Page 11-18, every other
vertical line measures 1 cm, or 1 minute in time at a speed of 1 cm/min.
Regardless of the heart rate scale, the uterine activity scale is pre-printed from 0–100
mmHg (0.0–13.3 kPa); this same scale is used for relative units. When SpO
2
and
monitoring is in progress, the scale is printed on the paper by the recorder. The
Figures on pages 12-3 and 12-4 also call out the top grid, bottom grid, and the
annotation area for each style paper.
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