Campbell Scientific RF401-series and RF430-series Spread Spectrum Data Radios/Modems - Manual (Page 116)

Appendix L. RF401/RF411 Average Current Drain Calculations
EXAMPLE #4 (Remote RF401/RF411 in “<0.4 mA, 8 sec Delay” standby mode)
The RF401/RF411s in this example are configured for the lowest possible
average standby mode current (Advanced Setup Menu selection 7). The same
amount and frequency of data are collected as in Example 1.
It = Is + Id + Ir + Ii
Calculating each term:
Is = table mA value = 0.4 mA
It ≈ 2.4 mA
In this example the dominant average current drain contributor becomes the
“time of inactivity to sleep” current.
mA 0.08 mA 73
ms 60,000
ms 65
mA 73
(ms) T
(ms)] N 2 (ms) 45 [
Id = Ч = Ч
+
=
mA 0.008 mA 24
(ms) 60,000
(ms) 20
Ir = × =
mA 2 mA 24
(ms) 60,000
ms 5000
Ii = × =
L-6