Campbell RF400 Manuál stáhnout pdf (Strana 115)

Appendix L. RF401/RF411 Average Current Drain Calculations

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

ms) 700 header" long("mA 0.014 mA 73

ms 3,600,000

ms 700

(ms) T

(ms) L

Ih ==×=×= mA

It ≈ 4.1 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" toinactivity of time"default (using mA 0.033 mA 24

(ms) 3,600,000

ms 5000

Ii =×=

L-7

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 125 126

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Campbell RF400 Manuál Strana 115