Gecko Compact Product User Manual
Also see for Blast: Product user manual
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Contents
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34Appendix BInternal BatteryWhen the optional internal Nickel Metal Hydride (NiMH) battery is fitted to the GeckoRugged, Prism or SMA-HR, the Gecko power circuit will be set to cut power when thebattery voltage drops too low to protect the battery.The internal battery pack is expected to run Gecko sensor models for several hours, withbackup time depending on Gecko model and the state of battery charge when AC power isdisconnected. When power is reconnected after the battery is discharged, the battery shouldbe fully charged in around 6 hours while the Gecko is operating, after which time theregulator will keep a small float current flowing to the battery that will offset the power thesystem draws while running.The internal battery pack is supplied with a 12V power supply plug pack that is compatiblewith 110-250V AC power sources, along with a NiMH charge regulator which is programmedto charge to battery pack in such a way as to maximise the life of the battery. The internalbattery pack can still be charged even if the Gecko itself is switched off.The AC plug pack outputs a DC voltage, but the charge regulator accepts power from anytype of DC power source, from 10V to 70V DC. We recommend that the power rating ofyour DC supply should be at least 24W (2A @ 12V DC).FloatChargingAC powerdisconnectedNew 1650mAHNiMH BatteryDischarge andRecharge Test(using Gecko SMA-HR)Geckoswitchesoff toprotectbattery.AC powerconnectedFully charged battery gives SMA-HRmore than 12 hours backup run timeSMA-HR running.Fully recharged inaround 6 hoursConstantCurrentChargingConstantVoltageChargingFloat |
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