Campbell RF401, Instruction Manual

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Appendix L. RF401/RF411 Average Current Drain Calculations
L-7
EXAMPLE #5 (Base RF401/RF411 in default “<4 mA, 1 sec Delay” standby mode)
The RF401/RF411s in this example are configured for the default average
standby mode current. The same amount of data (10 data points) are collected
as in Example 1, however the frequency of collection is changed from once a
minute to once an hour.
It = Is + Ih + Iq + Ir + Ii
Calculating each term:
Is = table mA value = 4 mA
It
≈
4.1 mA
ms) 700 header" long (" mA 0.014 mA 73
ms 3,600,000
ms 700
73
(ms) T
(ms) L
Ih
= = × = × =
mA
mA 0.0004 mA 73
(ms) 3,600,000
(ms) 20
Iq = × =
mA 0.0004 mA 24
(ms) 3,600,000
ms] 20 (ms) 45 [
Ir = ×
+
=
50) sleep" to inactivity of time " default (using mA 0.033 mA 24
(ms) 3,600,000
ms 5000
Ii
= = × =