b_cr800
TRANSCRIPT
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CR800-SeriesMeasurement & Control Systems
Rugged
Instruments with
Research-Grade
Perormance
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Features4MB*ofbattery-backedSRAM
Programexecutionrateofupto100Hz
CSI/OandRS-232serialports
13-bitanalogtodigitalconversions
16-bitmicrocontrollerwith32-bitinternalCPUarchitecture
Temperaturecompensatedreal-timeclock
Backgroundsystemcalibrationforaccuratemea-surementsovertimeandtemperaturechanges
SingleDACusedforexcitationandmeasurementstogiveratiometricmeasurements
GasDischargeTube(GDT)protectedinputs
Datavaluesstoredintableswithatimestampandrecordnumber
Battery-backedSRAMandclockthatensuredata,programs,andaccuratetimearemaintainedwhileaCR800-seriesdataloggerisdisconnectedfromthemainpowersource
Oneprogram-statusLED
SerialcommunicationswithserialsensorsanddevicessupportedviaI/Oportpairs
PB,Modbus,andDNP3protocolssupported
Model Descriptionsemodelsdierintheirkeyboarddisplay.eCR800usesanexternalkeyboarddisplay,theCR1000KD,whichconnectstotheCR800viaitsCSI/Oport.eCR850includesanon-board
keyboarddisplayaspartofitsintegratedpackage.
Operating System/Logic Controleon-boardoperatingsystemincludesmeasurement,processing,andoutputinstructionsforprogrammingthedatalogger.eprogramminglanguage,CRBasic,usesaBASIC-likesyntax.Measurementinstructionsspecictobridgecongurations,voltageoutputs,thermocouples,andpulse/frequencysignalsareincluded.Processinginstructionssupportalgebraic,statistical,andtranscendentalfunctionsforon-siteprocessing.Outputinstructionsprocessdataovertimeandcontrolexternaldevices.
Storage Capacity*eCR800serieshas2MBofashmemoryfortheOperatingSystem,and4MBofbattery-backedSRAMforCPUusage,programstorage,anddatastorage.Dataisstoredinatableformat.
CR800 & CR850
*Campbell Scientic is increasing the data storage memory rom 2 MB to 4 MB. Dataloggers with a serial number greater than or equal to 3605will have a 4 MB memory. Te 4 MB dataloggers will also have a sticker on the canister stating 4M Memory.
Removable Power Terminal
simplies connection to exter-
nal power supply.
Input/Output ConnectionsIndi-
vidually congured or ratiometric
resistive bridge, thermocouple,
switch closure, high requency pulse,
low-level ac, serial sensors, and more.
CS I/O Portconnects
with AC-powered PCs
and communicationperipherals such as
phone, RF, short-haul,
and multidrop modems.
RS-232provides a 9-pin DCE port or
connecting a battery-powered laptop,
serial sensors or RS-232 modems.
{
Measurement and Control Systems
The CR800 and CR850 dataloggers provide precision measurement capabilities in a rugged, battery-operated package. Both models
consist o measurement electronics encased in a plastic shell and an integrated wiring panel. The standard operating range is -25 to
+50C. An extended range o -55 to +85C or the CR800 or -30to +80C or the CR850 is also available.
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Input Output Terminals
Analog Inputsreedierential(6single-ended)channelsmeasurevoltagelevels.Resolutiononthemostsensitiverangeis0.67V.
Pulse CounterseCR800andCR850havetwopulsechannelsthatcancountpulsesfromhighlevel(5Vsquarewave),switchclosure,orlowlevelACsignals.
Switched Voltage ExcitationsTwooutputsprovideprecisionexcitationvoltagesforresistivebridgemeasurements.
Digital I/O PortseCR800-seriesdataloggersincludefourportsforfrequencymeasurements,digitalcontrol,andtrigger-ing.reeoftheseportscanalsobeusedtomeasureSDMdevices.eI/Oportscanbepairedastransmitandreceive.Eachpairhas0to5VUARThardwarethatallowsserialcommunicationswithserialsensorsanddevices.AnRS-232-to-logiclevelconvertermayberequiredinsomecases.
CS I/O PortAC-poweredPCsandmanycommunicationperipher-alsconnectwiththedataloggerviathisport.ConnectiontoanAC-poweredPCrequireseitheranSC32BorSC-USBinterface.Theseinterfacesisolatethe
PCselectricalsystemfromthedatalogger,therebyprotectingagainstgroundloops,normalstaticdis-charge,andnoise.
RS-232 PortThisnon-isolatedportisforconnectingabattery-poweredlaptop,serialsensor,orRS-232modem.Becauseofgroundlooppotentialonsomemeasure-ments(e.g.,lowlevelsingle-ended),AC-poweredPCsshouldusetheCSI/OportinsteadoftheRS-232port(seeabove).
Switched 12 Voltisterminalprovidesunregulated12Vthatcanbeswitchedonandounderprogramcontrol.
Enclosure/Stack BracketACR800orCR850housedinaweather-resistanten-closurecancollectdataunderextremelyharshcondi-tions.e28960EnclosureStackMountingKitallowsasmallperipheraltobeplacedunderthemountingbracket,thusconservingspace.
Communication ProtocolseCR800seriessupportsthePB,Modbus,DNP3,TCP/IP,FTP,andSMTPcommunicationpro-tocols.WiththePBprotocol,networkshavethedistributedroutingintelligencetocontinuallyevaluatelinks.Continuallyevaluatinglinksoptimizesdeliverytimesand,inthecaseofdeliveryfailure,allowsauto-
maticswitchovertoaconguredbackuproute.
eModbusRTUprotocolsupportsbothoatingpointandlongformats.edataloggercanactasaslaveand/ormaster.
eDNP3protocolsupportsonlylongdataformats.edataloggersarelevel2slavecompliant,withsomeoftheoperationsfoundinalevel3implementation.
eTCP/IP,FTP,andSMTPprotocolsprovideTCP/IPfunctionalitywhenthedataloggerisusedinconjunc-tionwithanNL200orNL240.
Transient ProtectionGasDischargeTube(GDT)protectstheinputsfromelectricaltransients.eCR800seriesisCEcompliantundertheEuropeanUnionsEMCDirective,meetingESD,EMC,FastTransientstandards.
Power SuppliesTypically,theCR800-seriesdataloggersarepoweredwithaPS200,PS100,orBPALK.ePS200andPS100providea7-Ahsealedrechargeablebatterythat
shouldbeconnectedtoachargingsource(eitherawallchargerorsolarpanel).eBPALKconsistsofeightnon-rechargeableD-cellalkalinebatterieswitha7.5-Ahratingat20C.
AlsoavailablearetheBP12andBP24batterypacks,whichprovidenominalratingsof12and24Ah,respectively.esebatter-iesshouldbeconnectedtoaregulatedchargingsource(e.g.,aCH200orCH100connectedtoaunregulated
solarpanelorwallcharger).
The PS200 and
CH200 (at right) are
micro-controller-
based smart char-
gers that have two
input terminals that
allow simultaneous
connection o two
charging sources.
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External Data Storage DeviceeCR800andCR850canusetheSC1152-GBFlashMemoryDrivetoaugmentonsitedatastorageortotransportdatabetweenthedataloggerandPC.
Keyboard DisplayKeyboarddisplaysareusedtoprogramthedatalog-ger,manuallyinitiatedatatransfer,anddisplaydata.BoththeCR850sintegratedkeyboarddisplayandtheCR1000KDcanshow8linesx21characters(64x128pixels).eirkeyboardincludes16characters.Custommenusaresupportedallowingcustomerstosetupchoiceswithinthedataloggerprogramthatcanbeinitiatedbyasimpletoggleorpicklist.
Mountable DisplayseCD100andCD295canbemountedinanen-closurelid.eCD100hasthesamefunctionalityandoperationastheCD1000KD,allowingbothdataentryanddisplaywithoutopeningtheenclosure.eCD295displaysreal-timedataonly.
iOS Devices, Android Devices, and PDAsAniOSdevice,anAndroiddevice,ourArcher-PCONFieldPC,orauser-suppliedPDAcanbeusedtoviewandcollectdata,settheclock,anddownloadpro-grams.TouseaniOSorAndroiddevice,gototheAppleStoreorGooglePlayandpurchaseourLogger-LinkMobileApps.User-suppliedPDAsrequireeitherPConnectorPConnectCEsoware.
Direct LinksAC-poweredPCsconnectwiththedataloggersCSI/OportviaanSC32BorSC-USBinterface.eseinter-facesprovideopticalisolation.Abattery-poweredlaptopcanbeattachedtothedataloggersRS-232portviaanRS-232cable;nointerfacerequired.
Internet and IP NetworkseNL240,NL200,orNL100interfacesenabletheCR800-seriesdataloggertocommunicatewithaPCviaTCP/IP.
Multidrop InteraceeMD485intelligentRS-485interfacepermitsaPCtoaddressandcommunicatewithoneormoredataloggersovertheCABLE2TPtwo-twistedpaircable.Distancesupto4000feetaresupported.
RadiosRadiofrequency(RF)communicationsaresupportedvianarrow-bandUHF,narrow-bandVHF,spreadspectrum,ormeteorburstradios.Line-of-sightis
requiredforallofourRFoptions.
elephone NetworkseCR800seriescancommunicatewithaPCusinglandlines,cellularCDMA,orcellularGPRStransceiv-ers.Avoicesynthesizedmodemenablesanyonetocallthedataloggerviaphoneandreceiveaverbalreportofreal-timesiteconditions.
Short Haul ModemseSRM-5ARADShortHaulModemsupportscom-municationsbetweenthedataloggerandaPCviaa
four-wireunconditionedline(twotwistedpairs).
Satellite ransmittersOurNESDIS-certi-edGOESsatellitetransmitterprovidesone-waycommuni-cationsfromaDataCollectionPlatform(DCP)toareceiv-ingstation.WealsooeranArgostransmitterthatisidealforhigh-lati-tudeapplications.
Communication Options
To determine the best option or an application, consider the accessibility o the site, availability o services (e.g., cellular phone or
satellite coverage), quantity o data to collect, and desired time between data-collection sessions. Some communication options can
be combinedincreasing the fexibility, convenience, and reliability o the communications.
Our GOES trans-
mitters are used
or stream stage
(shown), water
quality, and rainall
applications.
The SC115 is a light-weight, portable instrument that ts in a
pocket allowing easy transport between the datalogger and PC.
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Channel Expansion
4-Channel Low Level AC ModuleeLLAC4isasmallperipheraldevicethatallowscustomerstoincreasethenumberofavailablelow-levelACinputsbyusingcontrolports.ismoduleisoenusedtomeasureuptofouranemometers,andisespeciallyusefulforwindprolingapplications.
MultiplexersMultiplexersincreasethenumberofsensorsthatcanbemeasuredbyadataloggerbysequentiallyconnect-ingeachsensortothedatalogger.Severalmultiplexerscanbecontrolledbyasingledatalogger.eCR800andCR850arecompatiblewiththeAM16/32BandAM25Tmultiplexers.
Synchronous Devices or Measurement (SDMs)SDMsareaddressableperipheralsthatexpandthedata-loggersmeasurementandcontrolcapabilities.Forexample,SDMsareavailabletoaddcontrolports,analog
outputs,pulsecountchannels,intervaltimers,orevenaCANbusinterfacetothesystem.MultipleSDMs,inanycombination,canbeconnectedtoonedatalogger.
Sotware
Starter SofwareOureasy-to-usestartersowareisintendedforrsttimeusersorapplicationsthatdontrequiresophisti-catedcommunicationsordataloggerprogramediting.SCWinShortCutgeneratesstraight-forwarddatalog-gerprogramsinfoureasysteps.PC200Wallowscus-tomerstotransferaprogramto,orretrievedatafromaCR800orCR850viaadirectcommunicationslink.
Atwww.campbellsci.com/downloads,thestarterso-
warecanbedownloadedatnocharge.OurResourceCDalsoprovidesthissowareaswellasPDFversionsofourbrochuresandmanuals.
Datalogger Support SofwareOurdataloggersupportsowarepackagesprovidemorecapabilitiesthanourstartersoware.esesowarepackagescontainsprogramediting,commu-nications,anddisplaytoolsthatcansupportanentiredataloggernetwork.
PC400,ourmid-levelsoware,supportsavarietyoftelemetryoptions,manualdatacollection,anddatadisplay.Forprogramming,itincludesbothShortCutandtheCRBasicprogrameditor.PC400doesnotsupportcombinedcommunicationoptions(e.g.,phone-to-RF),PakBusrouting,andscheduleddatacollection.
RTDAQisanidealsolutionforindustrialandreal-timeusersdesiringtousereliabledatacollectionsowareoverasingletelecommunicationsmedium,andwhodonotrelyonscheduleddatacollection.RTDAQsstrengthliesinitsabilitytohandlethedisplayofhighspeeddata.
LoggerNetisCampbellScienticsfull-featureddatalog-gersupportsoware.Itisreferredtoasfull-featured
becauseitprovidesawaytoaccomplishalmostallthetasksyoullneedtocompletewhenusingadatalogger.LoggerNetsupportscombinedcommunicationoptions(e.g.,phone-to-RF)andscheduleddatacollection.
RTMC, a program or displaying the dataloggers data, is bun-
dled with LoggerNet and RTDAQ. Customers may also purchase
the RTMCRT and RTMC Web Server clients, which use orms
created in the developer mode o RTMC.
The SDM-SIO1 Serial Input/
Output Module is ully
compliant with the RS-232
standards. It allows a
CR800 or CR850 to com-
municate with up to
17 serial devices.
Both LoggerNet and RTDAQ use View Pro to display historical
data in a tabular or graphical ormat.
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Applications
The measurement precision, fexibility, long-term reliability, and economical price o the CR800 and CR850 make them ideal or scien-
tic, commercial, and industrial applications.
MeteorologyeCR800seriesisusedinlong-termclimatologicalmonitoring,meteorologicalresearch,androutine
weathermeasurementapplications.
SensorstheCR800seriescanmeasureinclude:
cup,propeller, andsonic anemometers
tippingbucket raingages
windvanes
pyranometers
ultrasonic rangingsensor
thermistors, RTDs,and thermocouples
barometers
RHprobes
Dataisoutputinachoiceofunits(e.g.,windspeedinmilesperhour,meterspersecond,orknots).Standardoutputsincludewindvectoraveraging,sigma,theta,andhistograms.
Agriculture and Agricultural Research
eversatilityoftheCR800andCR850allowsmea-surementofagriculturalprocessesandequipmentinapplicationssuchas:
Wind ProlingOurdataacquisitionsystemscanmonitorconditionsatwindassessmentsites,atproducingwindfarms,
andalongtransmissionlines.ereliabilityofthesesystemsensuresdatacollection,evenunderadverseconditions.Wideoperatingtemperaturerangesandweatherproofenclosuresallowoursystemstooperatereliablyinharshenvironments.
eCR800orCR850makesandrecordsmeasurements,controlselectricaldevices,andcanfunctionasPLCsorRTUs.Becausethedataloggerhasitsownpowersupply(batteries,solarpanels),itcancontinuetomeasureandstoredataandperformcontrolduringpoweroutages.
Typicalsensorsforwindassessmentapplicationsinclude,butarenotlimitedto:
Forturbineperformanceapplications,theCR800seriesmonitorselectricalcurrent,voltage,wattage,
stress,andtorque.
Meteorologicalconditionsaffectingmarinelarvaedistributionaremoni-toredatExumaCay,Bahamas.
ACampbellScientificdataloggingsystemmonitorsthisoffshorewindfarmlocatedbetweenRhylandPrestatyninNorthWalesatabout7to8kmouttosea.
Photocou
rtesyRADTechLtd.
UK
plantwaterresearch
canopyenergy balance
plantpathology
machinery performance
frostprediction
cropmanagement decisions
foodprocessing/ storage
integratedpest management
irrigationscheduling
cup,propeller,and sonicanemometers (upto10anemometers canbemeasuredby usingtwoLLAC4 peripherals)
windvanes
thermistors,RTDs, andthermocouples
barometers
pyranometers
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Air QualityeCR800seriescanmonitorandcontrolgasana-lyzers,particlesamplers,andvisibilitysensors.edataloggercanalsoautomaticallycontrolcalibrationsequencesandcomputeconditionalaveragesthatexcludeinvaliddata(e.g.,datarecordedduringpowerfailuresorcalibrationintervals).
Water Resources/AquacultureOurCR800seriesiswell-suitedtoremote,unattendedmonitoringofhydrologicconditions.Mosthydrologicsensors,includingSDI-12probes,interfacedirectlytothedatalogger.
Typicalhydrologicmeasurements:
Water levelismonitoredwithincrementalsha encoders,doublebubblers,ultrasonicranging sensors,resistancetapes,straingagepressure transducers,orvibratingwirepressuretransducers. VibratingwiretransducersrequireanAVW200 seriesoranotherVibratingWireInterface.
Well draw-down testsuseapressuretransducer
measuredatlogarithmicintervalsoratarate basedonincrementalchangesinwaterlevel.
Ionic conductivity measurementsuseoneofthe switchedexcitationportsfromthedatalogger.
SamplersarecontrolledbytheCR800orCR850asa functionoftime,waterquality,orwaterlevel.
Alarm and pump actuationarecontrolledthrough digitalI/Oportsthatoperateexternalrelaydrivers.
Vehicle estingisversatile,ruggeddataloggerisideallysuitedfortestingcoldandhottemperature,highaltitude,o-highway,andcross-countryperformance.eCR800andCR850arecompatiblewithourSDM-CANinterface,GPS16X-HVSreceiver.
Soil Moisture
eCR800andCR850arecompatiblewiththefollow-ingsoilmoisturemeasurementtechnologies:
Soilmoistureblocksareinexpensivesensorsthat estimatesoilwaterpotential.
Matricwaterpotentialsensorsalsoestimatesoil waterpotentialbutaremoredurablethansoil moistureblocks.
Time-DomainReectometrySystems(TDR)use areectometercontrolledbythedataloggerto accuratelymeasuresoilwatercontent.Multiplexers
allowsequentialmeasurementofalargenumber ofprobesbyonereectometer.
Self-containedwatercontentreectometersare sensorsthatemitandmeasureaTDRpulse.
Tensiometersmeasure thesoilporepressureof irrigatedsoilsand calculatesoilmoisture.
Other Applications
Wirelesssensor/ dataloggernetworks
Avalancheforecasting, snowscience,polar, highaltitude
Fireweather
Geotechnical
Historicpreservation
The CR800-series dataloggers are ideal or monitoring water
quality and level at reservoirs, springs, canals, pipelines, andculinary sites.
Vehicle monitoring
includes not only
passenger cars, but
airplanes, locomo-
tives, helicopters,
tractors, buses,
heavy trucks, drilling
rigs, race cars, and
motorcycles.
DatameasuredbythisweatherstationnearAspen,Coloradoisusedinavalancheforecasting.
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CR800-Series Specifcations
PROGRAM EXECUTION RATE10 ms to one day @ 10 ms increments
ANALOG INPUTS (SE1-SE6 or DIFF1-DIFF3)3 differential (DF) or 6 single-ended (SE) individuallyconfigured input channels. Channel expansion pro-vided by optional multiplexers.
RANGES and RESOLUTION: Basic resolution (BasicRes) is the A/D resolution of a single conversion.Resolution of DF measurements with input reversalis half the Basic Res.
Range (mV)1 DF Res (V)2 Basic Res (V)
5000 667 1333
2500 333 667
250 33.3 66.7
25 3.33 6.77.5 1.0 2.0
2.5 0.33 0.67
1Range overhead of ~9% on all ranges guarantees thatfull-scale values will not cause over range.
2Resolution of DF measurements with input reversal.
ACCURACY3:(0.06% of reading + offset), 0 to 40C
(0.12% of reading + offset), -25 to 50C(0.18% of reading + offset), -55 to 85C (-XT only)3Accuracy does not include sensor and measurement noise.Offsets are defined as:
Offset for DF w/input reversal = 1.5Basic Res + 1.0 V
Offset for DF w/o input reversal = 3Basic Res + 2.0 V
Offset for SE = 3Basic Res + 3.0 V
ANALOG MEASUREMENT SPEED:
Integra-
tion Type/Code
Integra-tion Time
SettlingTime
Total Time5
SE w/No Rev
DF w/Input Rev
250 250 s 450 s ~1 ms ~12 ms
60 Hz4 16.67 ms 3 ms ~20 ms ~40 ms
50 Hz4 20.00 ms 3 ms ~25 ms ~50 ms
4AC line noise filter.5Includes 250 s for conversion to engineering units.
INPUT NOISE VOLTAGE: For DF measurementswith input reversal on 2.5 mV input range; digitalresolution dominates for higher ranges.
250 s Integration: 0.34 V RMS50/60 Hz Integration: 0.19 V RMS
INPUT LIMITS: 5 V
DC COMMON MODE REJECTION: >100 dB
NORMAL MODE REJECTION: 70 dB @ 60 Hz whenusing 60 Hz rejection
SUSTAINED INPUT VOLTAGE W/O DAMAGE:16 Vdc max.
INPUT CURRENT: 1 nA typical, 6 nA max. @ 50C;90 nA @ 85C
INPUT RESISTANCE: 20 Gohms typical
ACCURACY OF BUILT-IN REFERENCE JUNCTIONTHERMISTOR (for thermocouple measurements):
0.3C, -25 to 50C0.8C, -55 to 85C (-XT only)
ANALOG OUTPUTS (Vx1-Vx2)2 switched voltage, active only during measurement,one at a time.
RANGE AND RESOLUTION: Voltage outputs program-mable between 2.5 V with 0.67 mV resolution.
VxACCURACY: (0.06% of setting + 0.8 mV), 0 to 40C(0.12% of setting + 0.8 mV), -25 to 50C(0.18% of setting + 0.8 mV), -55 to 85C (-XT only)
VxFREQUENCY SWEEP FUNCTION: Switched outputsprovide a programmable swept frequency, 0 to 2500 mvsquare waves for exciting vibrating wire transducers.
CURRENT SOURCING/SINKING: 25 mA
RESISTANCE MEASUREMENTSMEASUREMENT TYPES: Ratiometric measurements
of 4- and 6-wire full bridges, and 2-, 3-, and 4-wirehalf bridges. Precise, dual polarity excitation forvoltage excitation eliminates dc errors. Offset valuesare reduced by a factor of 2 when excitation reversal
is used.
VOLTAGE RATIO ACCURACY6: Assuming excitationvoltage of at least 1000 mV, not including bridgeresistor error.
(0.04% of voltage reading + offset)/Vx
6Accuracy does not include sensor and measurement noise.Offsets are defined as:
Offset for DF w/input reversal = 1.5Basic Res + 1.0 V
Offset for DF w/o input reversal = 3Basic Res + 2.0 V
Offset for SE = 3Basic Res + 3.0 V
PERIOD AVERAGING MEASUREMENTSAny of the 6 SE analog inputs can be used for periodaveraging. Accuracy is (0.01% of reading + resolu-tion), where resolution is 136 ns divided by the speci-fied number of cycles to be measured.
INPUT AMPLITUDE AND FREQUENCY:
Voltage
Gain
InputRange
(mV)
Signal (peak to peak)7 MinPulseWidth
(V)
Max8Freq
(kHz)Min. (mV) Max (V)
1 250 500 10 2.5 200
10 25 10 2 10 50
33 7.5 5 2 62 8
100 2.5 2 2 100 5
7With signal centered at the datalogger ground.8The maximum frequency = 1/(Twice Minimum Pulse Width)
for 50% of duty cycle signals.
PULSE COUNTERS (P1-P2)2 inputs individually selectable for switch closure, highfrequency pulse, or low-level ac. Independent 24-bitcounters for each input.
MAXIMUM COUNTS PER SCAN: 16.7 x 106
SWITCH CLOSURE MODE:Minimum Switch Closed Time: 5 msMinimum Switch Open Time: 6 msMax. Bounce Time: 1 ms open w/o being counted
HIGH FREQUENCY PULSE MODE:Maximum Input Frequency: 250 kHzMaximum Input Voltage: 20 VVoltage Thresholds: Count upon transition frombelow 0.9 V to above 2.2 V after input filter with1.2 s time constant.
LOW LEVEL AC MODE: Internal ac coupling removesdc offsets up to 0.5 V.
Input Hysteresis: 12 mV @ 1 HzMaximum ac Input Voltage: 20 VMinimum ac Input Voltage:
Sine Wave (mV RMS) Range(Hz)
20 1.0 to 20
200 0.5 to 200
2000 0.3 to 10,000
5000 0.3 to 20,000
DIGITAL I/O PORTS (C1-C4)4 ports software selectable, as binary inputs or controloutputs. Provide edge timing, subroutine interrupts/wake up, switch closure pulse counting, high frequencypulse counting, asynchronous communications (UARTs),SDI-12 communications, and SDM communications.
HIGH FREQUENCY MAX: 400 kHz
SWITCH CLOSURE FREQUENCY MAX: 150 Hz
EDGE TIMING RESOLUTION: 540 ns
OUTPUT VOLTAGES (no load): high 5.0 V 0.1 V;low