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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

mA 0.08 mA 73

ms 60,000

ms 65

mA 73

(ms) T

(ms)] N 2 (ms) 45[

Id =×=×

mA 0.008 mA 24

(ms) 60,000

(ms) 20

Ir =×=

mA 2 mA 24

(ms) 60,000

ms 5000

Ii =×=

It ≈ 2.4 mA

In this example the dominant average current drain contributor becomes the

“time of inactivity to sleep” current.

L-6

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Campbell RF400 Handbuch Seite 114