Campbell RF400 Manual descargar pdf (Pagina 116)

Appendix L. RF401/RF411 Average Current Drain Calculations

EXAMPLE #6 (Base 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 of data 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 = 0.4 mA

It ≈ 0.6 mA

ms) 8200 length header" long("mA .17 mA 73

ms 3,600,000

ms 8200

(ms) T

(ms) L

==×=×= mAIh

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" toinactivity of time"default (using mA 0.033 mA 24

(ms) 3,600,000

ms 5000

Ii ==×=

L-8

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Campbell RF400 Manual Pagina 116