Philips Avalon FM20, Руководство по обслуживанию

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12 Specifications
232
FHR Alarm Delay Range Bradycardia (low limit) Delay 10—300 seconds in steps of 10
s system alarm delay
Default: 240 seconds
Tachycardia (high limit) Delay 10—300 seconds in steps of
10 s system alarm delay
Default: 300 seconds
Signal Loss Delay 10—30 seconds in steps of
10 s system alarm delay
Fetal Heart Rate (Ultrasound/DECG) Alarm Specifications
MECG Alarm
Specifications Range Adjustment Alarm Delay
MECG Alarm Limits High Range: 31—240 bpm
Default: 120 bpm 1 bpm steps (30—40 bpm)
5 bpm steps (40—
240 bpm)
System alarm delay (see
“Fetal Monitors” on
page 227).
Low Range: 30—235 bpm
Default: 50 bpm
Extreme Tachycardia Difference to high limit: 0—
50 bpm
Default: 20 bpm 5 bpm steps
Clamping at: 150—240 bpm
Default: 200 bpm 5 bpm steps
Extreme Bradycardia Difference to low limit: 0—
50 bpm
Default: 20 bpm 5 bpm steps
Clamping at: 30—100 bpm
Default: 40 bpm 5 bpm steps
Maternal ECG Supplemental Information as required by IEC 60601-2-27
Heart Rate Averaging Method The maternal heart rate is computed by averaging the 12 most recent RR intervals.
If each of three consecutive RR intervals is greater than 1200 ms (i.e. rate less than
50 bpm), then the four most recent RR intervals are averaged to compute the HR.
Display Update Rate 2 seconds
Ventricular tachycardia alarm for
waveforms B1 and B2 No heart rate is detected for waveforms B1 and B2, resulting in
*** Extreme Brady
alarm
Response Time of Heart Rate
Meter to Change in Heart Rate HR change from 80—120 bpm: 10 seconds
HR change from 80—40 bpm: 14 seconds
Tall T-Wave Rejection Capability M2735A 1.2 mV T-Wave amplitude
M2738A 1.4 mV T-Wave amplitude
CL Toco
+
MP,
CL ECG/IUP
1.2 mV T-Wave amplitude