Kinemetrics EpiSensor2 User manual

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SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
Page i
TableofContents
NoUser‐ServicedParts...................................................................................................................iii
ElectricalSafetyNotice...................................................................................................................iii
IntroductionandProductDescription............................................................................................1
ElectricalConnections.....................................................................................................................3
OperationalControloftheShallowBoreholeEpiSensor2.............................................................6
Full‐ScaleRanges.........................................................................................................................7
DigitizerEnableLines(Q330usedforthisdescription)..............................................................7
RS‐422CommandLineInterface.................................................................................................7
RangeSignaling...........................................................................................................................7
AUTOZERO...................................................................................................................................8
Q330EnableLines(Q330usedforthisdescription)...............................................................8
RS‐422CommandLineInterface.............................................................................................8
CAL(Calibration)..........................................................................................................................8
Q330EnableLines(Q330usedforthisdescription)...............................................................9
RS‐422CommandLineInterface.............................................................................................9
RESET...........................................................................................................................................9
SetupandInitialOperation.............................................................................................................9
OperationalDetails.........................................................................................................................9
ChoiceofDigitizer.......................................................................................................................9
Full‐ScaleRangeSelection.........................................................................................................10
AUTOZEROMode......................................................................................................................10
Calibration(CAL)........................................................................................................................10
RetentionofSettings.................................................................................................................10
SensorResponseValues............................................................................................................10
InputPowerRequirements.......................................................................................................11
RS‐422CommandLineInterface...............................................................................................12
MainPageCommands...............................................................................................................12
PasswordProtection.................................................................................................................13
OperatePageCommands..........................................................................................................13
ResponsePageCommands.......................................................................................................14

SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
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Page ii
ActivityTimeoutandDisable....................................................................................................14
SecondsandTicks......................................................................................................................14
ShippingandHandling...............................................................................................................14
DeploymentHardwareInterfaces.............................................................................................15
ContactKinemetrics..................................................................................................................17
ShallowBoreholeEpiSensor2Specifications................................................................................18
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TableofFigures
Figure1ShallowBoreholeEpiSensor2module..............................................................................2
Figure2Detailsofpigtailendofcable...........................................................................................6
Figure3Pulse‐trainrangesignalfor+/‐4grange.........................................................................8
Figure4TopCapdetailsandmountingholepattern..................................................................16
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Table
Table1Connectionstosensorthroughpigtailcable.The“FIELD”suffixreflectsthoselinesthat
areoutsidethesystem'sgalvanicisolationbarrier........................................................................5

SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
NoUser‐ServicedParts
TheShallowBoreholeEpiSensor2isaself‐containedseismicaccelerometerpackagedina
slimlineboreholepackage.Thereisnoreasontoopenthesensorpackage,ortomodifythe
electronicsorsensorelementscontainedwithinit.Therearenointernalmanualadjustments
tomake,norarethereanyuser‐servicedpartswithinthesensor.Openingand/ormodifyingthe
sensorisunnecessary,anddoingsowillvoidtheinstrument'swarranty.
ElectricalSafetyNotice
Aswithallelectricalinstruments,potentiallylethalpotentialscanbepresentonallmetal
surfaces,includingconductorswithinanycables.Propergroundingoftheseelementsis
importanttominimizetheserisks.Theuserofthisproductisresponsibleforitsinstallationand
operationinasafemanner,andinaccordancewithalllocalrequirementsforelectricalsafety.
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SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
Page 1 December 2015
IntroductionandProductDescription
TheShallowBoreholeEpiSensor2isanadvancedforce‐balance,triaxialaccelerometerthat
buildsupontheoutstandingrecordofitspredecessor,theEpiSensor(theworld'sfirst
seismological‐gradestrongmotionaccelerometer).Itispackagedforsmalldiameterborehole
applications,todepthsofabout100meters.ThehighdynamicrangeoftheEpiSensor2allows
bothweakandstrongmotionrecordingfromasinglesensor.
TheEpiSensor2providesabroadsetofelectronically‐controlledoperationalmodes,including
range‐switching(allowing4g,2g,1g,0.5g,and0.25gpeak,full‐scaleranges),Offsetremoval
(AUTOZEROmode),andcalibration.Thesemodescanbecontrolledremotely,eitherviathe
digitizer(usingselectedenablelines)orviaanRS‐422commandlineinterface.
AnimportantfeatureoftheEpiSensor2isitsverylowquiescentpowerconsumption:under350
mW.Thesensorconsumes60%to70%lowerpowerthancompetingstrongmotion
accelerometers.Thismakesitidealforremote,battery‐poweredapplications.
TheShallowBoreholeEpiSensor2module,includingitspottedcable,isshowninFigure1.

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Figure1
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SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
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ElectricalConnections
TheShallowBoreholeEpiSensor2containsanintegralpottedcable,designforhighreliability
andlonglifetime,atdepth.Thecableis“pigtailed”,providingbarewireconnectionsatitsouter
end.Figure2showsacloseupofthepigtailedend.Thisreflectstheexistenceofthree(3)
“bundles”ofwires:SignalBundle(SB),ControlBundle(CB),andPowerBundle(PB).Each
bundleiswrappedwithinsulatingtubingatthepigtailedand,andeachcomeswithadedicated
drainwirethathasblackinsulationonit..Theconnectiondetailsofthecableareshownin
Table1.

PigtaileEndConnectionSignal Notes
Wire1/Pair1(SB):WhiteX_ACC_PLUS
Wire2/Pair1(SB):BlackACC_MINUS

Wire1/Pair2(SB):WhiteY_ACC_PLUS
Wire2/Pair2(SB):BrownY_ACC_MINUS

Wire1/Pair3(SB):WhiteZ_ACC_PLUS
Wire2/Pair3(SB):RedZ_ACC_MINUS

Wire1/Pair4(SB):WhiteANALOG_GND
Wire2/Pair4(SB):OrangeENABLE_GND_FIELD

Wire1/Pair5(CB):WhiteZ_RANGE_VOLTAGE
Wire2/Pair5(CB):YellowY_RANGE_VOLTAGE
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SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
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Page 4 December 2015
Wire1/Pair6(CB):WhiteX_RANGE_VOLTAGE
Wire2/Pair6(CB):GreenMSP430_RESET_FIELD

Wire1/Pair7(CB):WhiteCAL_ENABLE_FIELD
Wire2/Pair7(CB):BlueAUTOZERO_ENABLE_FIELD

Wire1/Pair8(CB):WhiteCAL_PLUS
Wire2/Pair8(CB):VioletCAL_MINUS

Wire1/Pair9(CB):WhiteRANGE_ENABLE_FIELD
Wire2/Pair9(CB):GrayMSP430_RS422_GND_FIELD

Wire1/Pair10(CB):BlackMSP430_RS422_TX+_FIELD
Wire2/Pair10(CB):BrownMSP430_RS422_TX‐_FIELD

Wire1/Pair11(CB):BlackMSP430_RS422_RX+_FIELD
Wire2/Pair11(CB):RedMSP430_RS422_RX‐_FIELD


Wire1/Pair12(PB):BlackINPUT_POWER_PLUS_FIELD