Xylem WS750 WASTEWATER/STORMWATER SAMPLER - Manual (Page 16)

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Appendix B: Battery Life
While battery life depends on several factors such as charge, condition and temperature; it
can generally be assumed that the sampler can deployed in the field for more than 3
months waiting to be triggered, while still retaining enough charge to run a single pump for
one hour (about 10 gallons) or both pumps for ½ hour (5 gallons). To prevent large current
surges which occur when the pumps first turn on, the WS750 is designed so that only one
pump will turn on or off at a time. A ½ second time delay is inserted between these events,
extending the life of the charge and the life of the battery.
Appendix C: Input and Output Connection