Campbell Scientific RF401-series and RF430-series Spread Spectrum Data Radios/Modems - 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