29
Beat2Phone ECG Instruction Manual
ECG details. The ECG measurement frequency is 2000 Hz. Heartbeat display
accuracy is one beat per minute, and the HRV display accuracy is one millisec-
ond.
The heart rate in beats per second is calculated as 60000/RRI, where RRI is the
R-peak to R-peak Interval in milliseconds.
The maximum heart rate displayed by the application is 299. The minimum dis-
played heart rate is 20. The maximum heart rate variability displayed is 200, and
the minimum is 0.
6.10
Sensor battery: Charging
The sensor battery should be fully charged before starting long-term monitoring.
Full battery capacity enables 24 hours of monitoring. Battery capacity will drop
after multiple charge cycles, and once the 12 h maximum recording time is
reached, replacing the sensor is recommended. The recommended recharge
time for a fully exhausted battery is 90 minutes. Sensor lifetime is determined by
the number of charge cycles until only one half of battery capacity can be at-
tained.
The provided charging connector accessory must be used for charging the sen-
sor battery in temperatures between 0 and 40 degrees Celsius. A broken charg-
ing connector must be replaced with a working one before the sensor is charged.
First, snap the sensor onto the charging connector. The shape of the sensor and
the connector ensure right polarity during connection. Before connecting to
power mains, the orange LED indicates leads-off if there is still some power in
the battery. Next, connect the charging connector to mains power supply. The
sensor LEDs will light up to indicate charging status. See
Figure 6-30Figure 6-30
and
Figure 6-31Figure 6-31
. Do not use a wet charging connector, charge in wet
conditions, or at too high temperatures.
Figure 6-30: Sensor is charging but not yet fully charged. White LED is lit.
Figure 6-31: Sensor is fully charged. Green LED is lit.