User's Manual Part 2
5-12 VS-XHR Sensor
Functional and performance specifications
NOTE: When AAMI-EC13 is referenced, it refers to 2002 version.
Parameter Value Condition/Note
Reception range 1 to 2 meters From sensor to monitor
Heart Rate sensing range 16 to 255 BPM Averaged on 15-second interval
Heart Rate resolution ±1 BPM
Sensing interval 15 seconds Fixed
Sensor battery life 4 days Typical
Sensor battery recharge time 11 hours Typical
Calibration None required
Sampling rate 256 samples/second
Analog bandwidth 3.5 Hz to 100 Hz
Input protection per AAMI-EC13-
4.1.2.1(a)
Not resistant VS-XHR may be damaged or its accuracy
may be affected by use of electrosurgery or
electrocautery equipment
Open lead detection current per
AAMI-EC13-4.1.2.1(b)
Maximum voltage 900 µV
Maximum current 990 nA
20 millisecond pulse
Tall T-wave rejection per AAMI-
EC13-4.1.2.1(c)
Meets requirements for 0.5 mV,
0.75 mV, 0.875 mV, 1.0 mV, 1.2
mV, and 1.4 mV
AAMI test waveform definition
HR averaging method per AAMI-
EC13-4.1.2.1(d)
Averages ensemble of last 16
IBIs
Rejects any IBI values greater than 37.5%
from ensemble average
Irregular rhythm response See table below
Response to change in HR per
AAMI-EC13-4.1.2.1(f)
80 BPM to 120 BPM: 15 sec
80 BPM to 40 BPM: 15 sec
Logged data
Alarms per AAMI-EC13-4.1.2.1
(g), (i), (j), (q)
Do not apply VS-XHR does not provide any alarm
functions
RF frequency and modulation per
AAMI-EC13-4.1.2.1(1)-1)
40.68 MHz ISM band FSK
modulation
Special skin preparation per AAMI-
EC-13-4.1.2.1(1)-2)
Preparation per instruction
manual
Detached leads, transmitter battery
depletion per AAMI-EC-13-
4.1.2.1(1)-3)
Message displayed on monitor Press any key to eliminate message
Out-of-range per AAMI-EC13-
4.1.2.1(1)-3)
Asterisk shown next to sensor ID
on Data Views
Electrode polarization per AAMI-
EC13-4.1.2.1(o)
See for recommended electrodes
Common mode rejection Does not apply VS-XHR directly attached to chest surface
Input impedance 5 MΩ
Input range (ac) 15 mV peak-to-peak
Input range (dc) +5 V to -0.9 mV
Defibrillator use See warnings
Leakage current per AAMI-EC13-
4.2.3 and 4.2.5
TBD
QRS detection voltage range per
AAMI-EC13-4.2.6.1
0.5 mV Waveform defined in AAMI-EC13 Fig 6
QRS detection time base range per
AAMI-EC13-4.2.6.2
TBD