Campbell Scientific RF401-series and RF430-series Spread Spectrum Data Radios/Modems User Manual
Page 112
Appendix L. RF401/RF411 Average Current Drain Calculations
The base RF401/RF411’s total average current
(It) can be calculated over an
interval (T) as follows:
It = Is + Ih + Iq + Ir + Ii
Is = {table value}
REMOTE
The average current drain of a remote RF401/RF411 being collected on
schedule has 4 contributors:
1) The STANDBY AVG RECEIVE CURRENT – Is
2) The average transmit current from data transmission – Id
3) The average receive current of data request receptions – Ir
4) The average receive current from “time of inactivity to sleep” – Ii
The remote RF401/RF411’s total average current
(It) can be calculated over an
interval (T) as follows:
It = Is + Id + Ir + Ii
Is = {table mA value}
length
header"
long
"
the
is
L
where
73
(ms)
T
(ms)
L
Ih
mA
×
=
point)
data
res
-
high
per
ms
(4
mA
73
(ms)
T
point]
data
per
ms
2
(ms)
45
[
Id
×
+
=
mA
24
(ms)
T
(ms)
20
Ir
×
=
50)
sleep"
to
inactivity
of
time
"
default
(using
mA
24
(ms)
T
ms
5000
Ii
=
×
=
mA
73
(ms)
T
(ms)
20
Iq
×
=
point)
data
res
-
high
per
ms
(4
mA
24
(ms)
T
point]
data
per
ms
2
(ms)
45
[
Ir
×
+
=
50)
sleep"
to
inactivity
of
time
"
default
(using
mA
24
(ms)
T
ms
5000
Ii
=
×
=
L-2