Welch Allyn Atlas Operator's Manual page 79

Scale Reference Bar
Lead Display
Heart Rate Display
Waveform Display
Leads Off Condition
Alarms
Alarm Ranges
Pulse Tone
Input Impedance
Input Protection
Defibrillator Recovery per EC13:1992 Clause
3.1.2.1a)
Impedance Respiration/Leads Off Detection
Current per EC13:1992 Clause 3.1.2.1b)
Tall T Wave Rejection per EC13:1992 Clause
3.1.2.1c)
Heart Rate Averaging Method per EC13:1992
Clause 3.1.2.1d)
Response to Change in Heart Rate per EC13:1992
Clause 3.1.2.1f)
Time to Alarm for Tachycardia per EC13:1992
Clause 3.1.2.1g)
Pacemaker Display per EC13:1992 Clause 3.2.9.12
A fixed 1 mV reference bar is displayed with the
top ECG waveform for scaling of the waveform.
This is provided in place of a standardizing voltage.
Single, user selectable: I, II, III; or I, II, III, aVR,
aVL, aVF, V
Numeric
One or two rows (cascading) of ECG waveform
display
Detected and displayed (selected lead only)
High and Low Heart Rate
Heart Rate Low Limits: 21 to 245 beats/minute
Heart Rate High Limits: 25 to 249 beats/minute
Constant frequency, ECG used alone;
Synchronized to SpO
used together, frequency varies with perfusion
>2.5 Megohms at 10Hz
Defibrillator and Electrosurgery protected
<8 seconds
50nA max for RA ,LA, LL, V; 200nA max for RL
Rejects Tall T waves through 1.4 mV
Number of consecutively detected beats:
>12: Heart rate = 60/(average of last 12 detected
consecutive R-R intervals)
<12: Heart rate = 60/(average of the detected
consecutive R-R intervals)
Increasing from 80 to 120 beats/minute: 3 sec
Decreasing from 80 to 40 beats/minute: 9 sec
Waveform 4(a)
Amplitude: Average time to alarm:
0.5 mV 6.21 seconds
1.0 mV 50.2 seconds
2.0 mV 10.96 seconds
Waveform 4(b)
Amplitude: Average time to alarm:
1.0 mV 50.3 seconds
2.0 mV 12.06 seconds
4.0 mV 6.40 seconds
Pacemaker signals displayed as captured.
67
pulse tone, ECG and SpO
2 2