Physio-Control LIFEPAK 15 - Manual (Page 249)

APPENDIX
A
©2007-2013 Physio-Control, Inc. LIFEPAK 15 Monitor/Defibrillator Operating Instructions
A-15
Table A-4 Alarm Performance Characteristics
CHARACTERISTIC DESCRIPTION
Heart Rate Alarm
Time For a 1 mV, 206 bpm tachycardia, the average detection time was 4.6 seconds.
For a test signal half as large, the average was 4.1 seconds. In this case the device
sensitivity was increased to 5mV/cm.
For a test signal twice as large, the average was 3.1 seconds.
For a 2 mV, 195 bpm tachycardia, the average detection time was 2.5 seconds.
For a test signal half as large, the average was 2.2 seconds. In this case the device
sensitivity was increased to 5mV/cm.
For a test signal twice as large, the average was 1.5 seconds.
Audible Alarms This is a standalone device. All alarm tones are internal to the LIFEPAK 15 monitor/
defibrillator. The alarm tone volumes range from 45 to 85 dB.
Alarm violations are manifested by tones, voice prompts, and visual indications.
Alarm manifestation occurs within 1 second after a displayed parameter violates its
alarm limit. User selectable alarm volume adjustment is provided. This adjustment
does not allow alarm volume to attain/reach a zero level.
SAS tones reinforce SAS messages provided on the product display.
The following identifies the tone assignments for each type of alarm:
• The priority 1 tone is used to alert the user to the possibility of death. This tone
is a 440 Hz and 880 Hz alternating tone with a 50% duty cycle and a 4 Hz
alternation frequency. This tone has a volume of 70 ±5 dB (A) as measured at a
distance of 1 meter from the display.
• The priority 2 tone (the Quick Set alarm tone) is used to alert the user that a
possible life-threatening condition exists. This tone is a continuous 698 Hz tone.
This tone has a volume that is lower than the priority 1 tone.
• The priority 3 tone is used to alert the user that an abnormal condition exists.
Three beeps at 1046 Hz for 100 ms duration each with a 150 ms silence
between the first and second and the second and third, followed by a 200 ms
silence. This tone has a volume that is lower than the priority 2 tone.
• Priority 3 tones come in single and repeating types: for a single tone, the 3-beep
sequence sounds only once. For a repeating tone, the 3-beep sequence sounds
every 20 seconds.
• The priority 4 tone is a momentary tone between 500 and 1500 Hz. This tone
has a volume that is lower than the priority 3 tone.
Specific characteristics are:
– QRS and Volume Setting Tone—100 msec duration at 1397 Hz—4 msec
duration at 1319 Hz.
The alert tone shall consist of one set of two tones to precede voice prompts and to
draw attention to the display. Specific characteristics consist of:
• 1000 Hz square wave, 100 ms duration.
• Silence, 100 msec duration.
• Silence, 140 msec duration (when preceding a voice prompt).
• Voice prompt, when used.