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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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
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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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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.
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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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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

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Wire2/Pair12(PB):OrangeINPUT_POWER_RETURN_FIELD

SignalBundle(SB)DrainWire(BlackInsulation)SIGNAL_BUNDLE_SHIELD
ControlBundle(CB)DrainWire(BlackInsulation)CONTROL_BUNDLE_SHIELD

PowerBundle(PB)DrainWire(BlackInsulation)CASE_GND
Table1Connectionstosensorthroughpigtailcable.The“FIELD”suffixreflectsthoselines
thatareoutsidethesystem'sgalvanicisolationbarrier.
Generally,werecommendconnectingtheSignalBundle(SB)andControlBundle(CB)shields,to
anAnalogGroundsignal,atthedigitizerend.ForusersofQuanterraQ330orKinemetrics'Rock
seriesdigitizers,thesewouldconnecttodigitizerpinsCandF,respectively.
Thedigitalenablelinesarefully‐isolatedfromotherlinesinthesystem.Theyoperateoveran
approximate2Vto10Vinputrange.TheRS‐422interfaceisfullyisolatedaswell.
Thepowerinputs(pinsbandc)requirevoltagerangeof9‐36Vatthesensorinput.This
galvanically‐isolatedinputhasreverse‐polarityprotection,aswellasovercurrentprotection.
TheANALOG_GNDgroundlineisthecommonmodevoltagereferenceforthedifferentialsignal
lines.Italsoservesasthereferencegroundfortherangevoltagesignals.
Thecalibration(CAL)inputisdifferential,witha+/‐12Vrange.Thecommonmodereferencefor
thesesignalsisANALOGground.
DONOTUSETHEELECTRICALCABLEFORLIFTING!!!Asdiscussedbelow,thereisabolt
patternonthesensortopcapdesignedforlifting/deploymenthardware.
PleasecontactKinemetricstodiscussspecificcablerequirements.
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SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
Page 7 December 2015
Full‐ScaleRanges
TheShallowBoreholeEpiSensor2supportsfivedigitally‐selectableranges(withnominalscale
factors):
Range5:+/‐4g(5V/g)
Range4:+/‐2g(10V/g)
Range3:+/‐1g(20V/g)
Range2:+/‐0.5g(40V/g)
Range1:+/‐0.25g(80V/g)
Thescalefactorsfortheserangesarefactory‐trimmedtoanaccuracyof+/‐0.25%.
DigitizerEnableLines(Q330usedforthisdescription)
1. ThesensormonitorstheQ330'sGenericEnableline3(“AUX2”).
2. Apulse‐lengthencodingschemeisusedtoselecttherange
Assertingthelineforbetween4.5and5.5secondsplacesthesensorrangeat+/‐4g
Assertingthelineforbetween3.5and4.5secondsplacesthesensorrangeat+/‐2g
Assertingthelineforbetween2.5and3.5secondsplacesthesensorrangeat+/‐1g
Assertingthelineforbetween1.5and2.5secondsplacesthesensorrangeat+/‐
0.5g
Assertingthelineforbetween0.5and1.5secondsplacesthesensorrangeat+/‐
0.25g
RS‐422CommandLineInterface
1. AttheMAINprompt,enter“enable12345”toallowaccesstocommandmenus
2. Type“OPERATE”toselectOPERATEpage
3. AttheOPERATEprompt,typecommandtoselectrange:
1. “4g”for+/‐4g
2. “2g”for+/‐2g
3. “1g”for+/‐1g
4. “0.5g”for+/‐0.5g
5. “0.25g”for+/‐0.25g
RangeSignaling
TheEpiSensor2feedsarange‐dependentsignalintothethelowresolutionmassposition
channelsoftheQ330orRockdigitizers:
5V(~50counts)for+/‐4grange
4V(~40counts)for+/‐2grange
3V(~30counts)for+/‐1grange
2V(~20counts)for+/‐0.5grange
1V(~10counts)for+/‐0.25grange
Inaddition,theEpisensor2outputsacodedrangesignaltoeachofthechannels'SIGNALline:
5pulsesfor+/‐4grange
4pulsesfor+/‐2grange
3pulsesfor+/‐1grange
2pulsesfor+/‐0.5grange

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

SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
Page 9 December 2015
Q330EnableLines(Q330usedforthisdescription)
1. ThesensormonitorsQ330CAL_ENABLEline
2. AssertingthelineenablesCAL.SignalspresentedattheCAL+/‐inputpinsofthe
connectorwillbeinjectedintothecalibrationcircuitofthesensor
3. De‐assertingthelinedisablesCAL
4. Thesensoroperatesseamlesslywiththestandard“Start/StopSensorCalibration”
commandsintheQ330controlsoftware(Willard).
RS‐422CommandLineInterface
1. AttheMAINprompt,enter“enable12345”toallowaccesstocommandmenus
2. Type“OPERATE”toselectOPERATEpage
3. AttheOPERATEprompt,typecommandtoselectrange:
“CALON”enablesCAL
“CALOFF”disablesCAL
RESET
AssertingtheQ330GenericEnable2(“AUX1”)linereststhesensor.Iteffectisequivalenttoa
Power‐ON‐RESET(POR)event,withoutinterruptingthepower.
SetupandInitialOperation
TheShallowBoreholeEpiSensor2shouldbedeployedwithinawell‐formedholethat
completelysurroundsandcoversthesensor.Thesensitivehorizontaldirections(XandY)are
definedviaamarking(so‐called“N”)onthetopcapofthesensor.Thelinenextto“N”is
alignedwithY.Onthehigherranges(i.e.,4g,2g,and1g),thesensorcanoperateatnearlyany
tiltangle.However,thelowestnoiseperformanceisachievedbylevelingthesensorcarefully
(withthepackagebodybeingalignedtothelocalvertical).
Uponpower‐ON,oraRESETevent,thesensorwilloutputananalogsignalonitsrangeindicator
lines.Thesewillberecordedbythedigitizer.Theusercanverifythecurrentrangesettingby
monitoringthesevalues,orbyanalyzingthepulse‐trainsequence,showninFigure3.Itis
recommendedtomonitorthesensoroutputviatheRS‐422interface,toverifyproperstartup.
Thesensorwilloutputasetofstatusvalues,asindicatedbelow,atstartup.
Atthispoint,thesensorisoperational.
OperationalDetails
ChoiceofDigitizer
Theinstantaneousdynamicrangeofthesensorisgreaterthanthatofanymodernseismic
digitizer,particularlywhenoperatingonthe4gand2granges.26‐bitdigitizers(suchasthe
Q330HR)arepreferredforutilizingthegreatestpartofthisrange.Moreconventional24‐bit
digitizersalsoworkwell,however,theself‐noiseofaproperlyinstalledsensoriswellbelow
thatoftheinputnoiseofthedigitizer.Somedigitizersprovideintegratedpreamplifiers.While
theseareusefulforinvestigationoftheexactlevelsofsensorself‐noise,theirusewillgreatly
reducethefull‐scalerangeofthesensor.Thiseffectivelydefeatsthepurposeofa“strong

SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA

Page 10 December 2015
motionaccelerometer”!Typically,thebestsystemperformancewillbeachievedbyuseofa
Q330HR(26‐bit)digitizer,withitspreamplifiersOFF.
Full‐ScaleRangeSelection
Sensordynamicrangeistypicallyhighestonthehighestfull‐scalerangesettings(+/‐4gand+/‐
2g),wherethe1Hzdynamicrangeisinexcessof160dB.However,sensorself‐noisetypically
dropswithrangesetting(althoughnoiseon0.5gand0.25grangesarepracticallyidentical).The
choiceof(peak)full‐scalerangeshouldensurethatthereisnear‐zerochanceofclippingdueto
maximumlocalaccelerations.Usersshouldselectrangesabovethemaximumexpectedsignal.
AUTOZEROMode
TheAUTOZEROsystemrecordsandcorrectsthesensoroffsetsinsitu.Thiscorrectioncancels
fixedmechanicaloffsetsinthesensorelement,aswellastilt‐relatedoffsetsduetosensor
mounting.Itinjectsaseparatefeedbackcurrentthatisautomaticallygeneratedtocancelthe
observedoffset.AUTOZEROiseitherOFF(standardmode),orON.Anytimethatthesensoris
RESET,oritexperiencesaPower‐ON‐RESET,ortheAUTOZEROisexplicitlysetviathevarious
controlinterfaces,thesensorre‐calculatesandcorrectsitsoffsets.Whencontinuously
powered,thesensorretainsthesameoffsetremovalcurrentsetting.
AUTOZEROrequireshigherquiescentpowerconsumption(about120mWextra),andit
increasesself‐noiselevels.Unlesstheuserhasspecialrequirements(e.g.,usingaverylow
dynamicrangedigitizerrequiringtheuseofinputpreamplifiers),werecommendleavingthe
AUTOZEROinitsOFFstate.Anymoderndigitizer,aswellasmanydataanalysisalgorithms,are
notaffectedbyDC‐offsetsinthesignals,orinthedigitaldata.
Calibration(CAL)
Calibrationisseamlesslysupportedthroughthedigitizerconnection.Thisincludesadigital
controllineforconnectingthe(differential)calibrationinputsignalstothesensorelements,
anduseofthevoltagesourcesprovidedbythedigitizer.FortheShallowBoreholeEpiSensor2
(withDC‐320+Hzbandwidth),randomnoiseisanexcellentcalibrationstimulussource.
RetentionofSettings
Thecurrentfull‐scalerangeandAUTOZEROstatus(ONorOFF)isstoredinEEPROMwithinthe
sensor.Thesesettingsareupdatedwheneverthestatusischangedbytheuser(orthe
digitizer).UponasystemPower‐ON‐RESET,orsimpleRESET,thesensorisrestoredtothethe
storedoperatingconfiguration.Thecalibrationstatus,however,isvolatile.FollowinganyRESET
event,thecalibrationmodemustbere‐enteredusingeitherthedigitizerenableline,oranRS‐
422command.
SensorResponseValues
Eachsensorelementistrimmedduringmanufacture,toprovideastandardscalarresponse
(Volts/g)oneachofthefive(operatingranges).Inaddition,eachsensoraxisistrimmedto
ensurethatitsresponsebandwidthfallswithinasetrange(‐3dBamplitudepointatorabove
320Hz).


SHALLOWBOREHOLEEPISENSOR2 DOCUMENT305802,REVISIONA
Page 11 December 2015
Thescalarresponsivity(G)isstoredonthe“RESPONSE”pagethatisdescribedbelow.A
commandqueryonthispage(“status”command)willreturnthescalarresponsevaluesfor
eachelement,atthecurrentfull‐scalerangesetting.
TheEpisensor2frequencyresponsecanbedescribedwellbyasimplesetofconjugatepole
pairs:
P1=‐700+/‐1250j(radians/second)
P2=‐1340+/‐3350j(radians/second)
Thefullresponseisdefinedas:
V(s)=G|P1|2|P2|2
(s–P1)(s–P1*)(s–P2)(s‐P2*)

whereGisthescalarresponsivity(Volts/Standardg).(Astandardgisdefinedas9.81m/sec2).
InputPowerRequirements
TheShallowBoreholeEpiSensor2operatesfromawide(9‐36V)inputsupplyrange.The
quiescentpowerconsumption(inputpowerintheabsenceofsignificantseismicsignals,with
theRS‐422interfacedisconnected)isunder350mW.Typically,thecurrentdrawis25to28mA
@12V.
ApersistentRS‐422connectionincreasespowerconsumptionby10to20mW.
Dynamicsignalsincreaseinstantaneouspowerconsumption.Atypicalruleofthumbisthatfor
every1gincreaseininputsignal,peraxis,powerconsumptionincreasesbyabout150mW.At
theabsolutehighestdrivelevels:4gsimultaneouslyoneachofthethreeaxes(unheardoffrom
naturalseismicsources),thisexcesspowerconsumptionwouldamounttoabout1.8W.
Naturally,dynamicsignalsimposelowermeanenergydemands.Also,exacttemporal
correlationbetweensignalsonthethreeaxesisveryunlikely.Theabsolutemaximumdynamic
inputpowerisalmostcertainlylowerthan1.8W.Assuch,themaximuminputpower
requirements,quiescentplusdynamic,isexpectedtobeunder2W.Assuch,alowimpedance,
2WpowersupplyissufficientfortheEpiSensor2.
Likemostanalogsensorproducts,thepowerinputhasamoderatelevelofinputcapacitance(a
fewtensofmicrofarads).Anycompetentpowersourceshouldbeabletoprovidethe
instantaneousinrushcurrents(afewampsoverafewtensofmicroseconds)requiredtocharge
thesecapacitors.Batterypowerisideal.Also,theShallowBoreholeEpiSensor2hasbeenfully
testedusingtheintegralsensorpowersuppliesprovidedbytheQuanterraQ330‐series,and
KinemetricsRock‐seriesdigitizers.
Althoughthesensorelectronicsemploymultiplestagesofpowersupply(noise)rejection,itis
alwaysbesttouseclean,well‐regulatedinputpower.





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RS‐422CommandLineInterface
Thesensorprovidesanisolated,full‐duplexRS‐422interfaceoperatinginaverystandard
mode:9600baud,8databits,1startbit,Noparity.Theinterfacedoesnotsupporthardwareor
softwarehandshaking.Thisinterfacesupportsoperationoverdistancesofhundredsofmeters.
ItisexpectedthattheuserisconversantwithdetailsofRS‐422operation(differential
connections,externalRXlinetermination,etc.).PleasecontactKinemetricsifyouhaveany
questions.
WithinaPCenvironment,werecommendusingcommercialUSB‐to‐RS422converters,suchas
thosemadebyFTDI(e.g., USB-RS422-WE-1800-BT). One important point, in power-
constrained applications, is that the standard RX termination used in most commercial products
(120 ohms between RX+ and RX-) leads to higher quiescent power consumption. Replacing this
resistor with a series R-C network (120 ohms +0.1 uF) will satisfy the specific termination
requirements, while minimizing power consumption. R-C compensation is used on the RX lines
within the sensor. Kinemetrcs can suggest some product options for implementing this on the
“field” side of the interface.
Astandardterminalemulatorprogram(suchasPuTTY)canbeusedtocommunicatewith
sensor.NotethattheemulatorshouldbesetsothatControl‐Hrepresentsthebackspacekey.
Thiswillallowthesensortorespondproperlytobackspacesenteredbyusersintheterminal.
Afterpower‐ON,thesensorwilloutputsensorspecificinformationandwillleavetheuserat
theMainpageprompt.Thecommandsarenotcase‐sensitive.Allkeyboardcommandsare
completedbyhittingthe“Enter”key.Onanypage,the“?”characterwilllistthespecific
commandsavailableonanypage.
MainPageCommands
Epi2.0MainMenu:MAIN>?
Commands:
OPERATE:SelectsSensorControlMenu
RESPONSE:SelectsRESPONSEMenu
SAFE:DisablesSensorSystemControl
ENABLE######:EnablesSensorSystemControl(######isPassword)
STATUS:PrintSystemStatusInfo
?:HelpForInfoonspecificCommand

Seconds=4179
Ticks=42
Epi2.0 Main Menu:MAIN>
The“status”commandpromptsthesystemtoprintoutasetofsystem‐relateddata:
Epi2.0 Main Menu:MAIN> status
Kinemetrics Borehole Episensor2.0 Serial Number 50015
Borehole Episensor2.0 Power Board Number: 40016
Borehole Episensor2.0 Main Board Number: 20015

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Borehole Episensor2.0 Digital Board Number: 30015
Borehole Episensor2.0 MSP430 Code Revision 13.02.00
X Sensor Module Serial Number: Number 2071
Y Sensor Module Serial Number: Number 2234
Z Sensor Module Serial Number: Number 1130
Sensor FS Range is 4g
AUTOZERO is OFF
CAL is OFF
Seconds=283
Ticks=197
Epi2.0 Main Menu:MAIN>
PasswordProtection
Thesystemmustbeenabledtoallowaccesstoothermenus.Theenablecommandis
“enable12345”.
OperatePageCommands
Epi2.0 Operate Menu:OPERATE> ?
Commands:
4G: Sets Sensors to 4g FS Range
2G: Sets Sensors to 2g FS Range
1G: Sets Sensors to 1g FS Range
0.5G: Sets Sensors to 0.5g FS Range
0.25G: Sets Sensors to 0.25g FS Range
AUTOZEROON: Turns ON Autozero Mode
AUTOZEROOFF: Turns OFF Autozero Mode
CALON: Enables Sensor CAL
CALOFF: Disables Sensor CAL
STATUS: Prints Sensor Operating Mode Values
SAFE: Disables Sensor System Control
RETURN: Return to Previous Menu
?: Help for info on specific command
Seconds=328
Ticks=910
Epi2.0 Operate Menu:OPERATE>
The“status”commandpromptsthesystemtoprintoutasetofsystem‐relateddata:
Epi2.0 Operate Menu:OPERATE> status
Sensor FS Range is 4g
AUTOZERO is OFF
CAL is OFF

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Page 14 December 2015
Seconds=4364
Ticks=36
Epi2.0 Operate Menu:OPERATE>
ResponsePageCommands
Epi2.0 Response Menu:RESPONSE> ?
Commands:
SCALE: Shows Scale Factor for Each Range and Axis
STATUS: Prints Current Sensor Response Values
SAFE: Disables Sensor System Control
RETURN: Return to Previous Menu
?: Help for info on specific command
Seconds=4421
Ticks=222
Epi2.0 Response Menu:RESPONSE>
The “status” command prompts the system to print out a set of system-related data:
Epi2.0 Response Menu:RESPONSE> status
Sensor FS Range is 4g
X Sensor Module Scale Factor is 5001 mV per Standard g
Y Sensor Module Scale Factor is 4998 mV per Standard g
Z Sensor Module Scale Factor is 4999 mV per Standard g
AUTOZERO is OFF
CAL is OFF
Seconds=4447
Ticks=789
Epi2.0 Response Menu:RESPONSE>
ActivityTimeoutandDisable
Onceenabled,thesensorwillautomaticallybedisabledafter3600secondsofinactivity(no
commandsentered),oronaRESETorPOWER‐ON‐RESETevent.Whendisabled,thesensoris
returnedtotheMainPage.Theuserwouldthenneedtore‐enablethesystemtoaccessother
pages.Systemcontrolisalsodisabledwitha“safe”commandenteredonanypage.
SecondsandTicks
ThesensormeasuresandreportselapsedtimesinceitslastRESETorPower‐ON‐RESETevent.
“Seconds”arethenumberofelapsedseconds.“Ticks”areasub‐secondmeasureapproximately
equalto1msec.
ShippingandHandling
