8
6.2
Power consumption estimates
For safe scenario’s it is advised to calculate with 50-60% of the mAh capacity as indicated on the battery used. This takes
into account the self-discharge of most batteries and the possibly needed peak current for the GSM modem.
Smart digital instrument need to remain powered all the time as the power-on sequence takes time and most instruments
need to reach a temperature equilibrium. The switched on instruments will have a significant impact on the power
consumption.
A Kipp & Zonen Smart instrument on average uses 8mA on low voltages (5-9V) and 4mA on higher voltages.
Tabel updated 20-03-2018 Valid for 12V power
Scenario
Instruments
Measurement
interval seconds
GSM data
transfer
LogboxSE and instrument
current in mA
mAh per day LogboxSE
and instruments
1
Analog
60
None
0.15
3.6
2
Analog
1
None
1.5
36
3
Analog
1
Every 24 hr
1.51
37.7
4
Analog
1
Every hr
3.2
76
5
Smart digital 1x
1
None
7
168
6
Smart digital 2x
1
None
11
264
7
Smart digital 4x
1
None
19
456
8
Smart digital 4x
1
Every 24 hr
19.07
457
9
Smart digital 4x
1
Every hr
20.7
496
Tabel updated 20-03-2018 Valid for power from 6x AA battery
Scenario
Instruments
Measurement
interval seconds
GSM data
transfer
LogboxSE and instrument
current in mA
mAh per day LogboxSE
and instruments
1
Analog
60
None
0.15
3.6
2
Analog
1
None
1.5
36
3
Analog
1
Every 24 hr
1.51
37.7
4
Analog
1
Every hr
3.2
76
5
Smart digital 1x
1
None
11
264
6
Smart digital 2x
1
None
16
456
7
Smart digital 4x
1
None
35
840
8
Smart digital 4x
1
Every 24 hr
35.07
841
9
Smart digital 4x
1
Every hr
36.7
880
Running Smart instruments on 6x AA battery is not practical.
Estimated days of working time = mAh of batteries *50% ÷ (mAh per day LogboxSE and instruments)
