Motorola GTR 8000 - Mounting the Battery Temperature Sensor

3.4.3.4MountingtheBatteryTemperatureSensor
3.4.3.4MountingtheBatteryTemperatureSensor
A40-footbatterytemperaturesensorcableisshippedwithyourdevice.Thisthree-wirecablecarriesavoltagesignal
tothepowersupplyfromasensorelementwhichneedstobemountedincloseproximitytothestoragebattery.
V oltageisproportionaltothebatterytemperatureandisusedbydiagnosticcircuitryinthepowersupplymodule.
The40-footcablecanbeextendedtoatotallengthof190feetusing50-footextensions(Motorolapartnumber
3084827Y04.See8.5UsingMotorolaSystemSupportCenter(SSC),page8-8.
Thesensingelementofthetemperaturesensorneedstobemountedsothatitdetectstheactualbatterytemperature
(ortheambienttemperatureascloseaspossibletothebatteriesbeingcharged).Therearetwoexamplesofmounting:
Example1
Usecabletiestoattachthesensingcabletothepositive(ornegative)powercable.Aminimumoftwocable
tiesshouldbeused(spaced6inchesapart),withoneofthecabletiesnotmorethan2inchesfromthesensing
element.Thesensingelementitselfshouldbenotmorethan2inchesfromthebatterypostwherethepower
cableconnects.SeeFigure3-5.
Figure3-5BatteryTemperatureSensorExample1
Example2
Attachthesensingcabletoanexistingbatterytraysupportbracketusingcabletiesornylonloopstrapsoftheproper
size.Thesensingelementshouldbeplacedsothatitisnotmorethan2inchesfromthesurfaceofthebatteries
beingmonitored.Aminimumoftwocabletiesand/orloopstrapsshouldbeusedtosecurethesensingcabletothe
bracket.Thecableties/loopstrapsshouldbeplacednomorethan6inchesapartwithoneplacednomorethan
2inchesfromthesensingelement.SeeFigure3-6.
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