Xylem CHATTER Hardware Manual - Manual (Page 41)

Calculation Example 3
Chatter basic consumption per day (fixed) =
1.0
No. of logs per day @sensor consump.=2mA 24 x 0.1 = 2.4
No. of logs per day @sensor consump. =4mA - x 0.2 = -
No. of event logs per day @sensor consump.=2mA 180 x 0.1 = 18.0
No. of event logs per day @sensor consump. =4mA - x 0.2 = -
No. of calls per day 2 x 3 = 6.0
No. of alarm calls per day - x 3 = -
Consumption per day (total): 27.4
Battery lifetime in days: 15000/consump. per day [day] = 547.0
Battery lifetime in months: Battery lifetime [days]/30 [months] = 18.2
Battery lifetime in years: Battery lifetime [months]/12 [years] = 1.5 yrs
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Appendix B. Calculation of Battery Lifetime
Data Logger
41