User's Manual

45
Brand of ACOEM
2. PERIODICITY
Normal use of the product corresponds to a daily measurement and no more than 6
measurements per day.
Below 4h of periodicity (minimum theoretical periodicity is 10 minutes) many parameters can
affect periodicity and battery life.
The numbers of sensors of one network (paired with the same gateway) is a parameter. The
more they are, the larger is the minimum periodicity. This is due to the sum of time needed
for each sensor to send its data.
The signal strength is another parameter. The weakest the signal, the longer the upload.
3. AUTONOMY
The expected autonomy when measuring the recommended configuration is:
Periodicity
Uniaxial
Triaxial
8-24 hrs
> 5 years
~ 5 years
6 hrs
> 5 years
~ 3 years
4 hrs
~ 4 years
~ 1 year
Things that will make this Autonomy worse:
 RF link: poor RF link will cause large transfer duration or the signal to fail to transmit and
retry, which uses up power.
 Temperature: Extreme temperatures makes the electronics use more power and the
battery to have less potential capacity.
 Signals: aggressive waveforms configurations or high quantity of signals make data
bigger and increase the transfer duration.
 Periodicity: too short periodicity increases the number of measurement requests and
transfers.
All this points are interconnected; the goal is to find the appropriate balance.
0:00
0:30
1:00
1:30
2:00
2:30
3:00
3:30
4:00
4:30
0 10 20 30 40 50
Minimum periodicity (h)
Number of sensors / gateway
Impact of sensors on periodicity
TRIAXIAL
UNIAXIAL