DataView DVTH
Data
Logger
for Temperature
and Humidity
Logs
temperature,
humidity,
and
dew
point
Built-in
real
time
text
and
graphical
display
Stand-alone
or
PC-connected
operation
Deep
sample
memory
Battery-powered
Built-in
USB
port
Features
TheDataViewDVTHisaself-contained,
precisiondataloggerforrecordingthe
temperatureandrelativehumidityofthe
surroundingenvironment.TheDVTHcan
storeupto43,344temperaturesamples,
orupto21,672ofbothtemperature
andrelativehumiditysamples,andit
alsocomputesanddisplaysDewPoint
Temperatureinrealtime.Thedata
logger’ssamplingintervalmaybesetfrom
onesecondto18hoursinone-second
increments.AmajorfeatureoftheDVTH
isabuilt-indisplaythatprovidesareal
timegraphicplotoftemperatureandRH
thatevenallowsyoutoscrollthroughthe
recordinghistorywithoutinterrupting
thecurrentrecordingsession.Twotext
summaryscreensmayalsobeenabled.
OnedisplaysthecurrentRH,temperature,
anddewpointinlarge,easy-to-readblock
characters.Aseconddisplayslogging
informationsuchasthesamplingrate,the
numberofsamplesrecorded,thelength
ofthecurrentrecordingandtheamount
oftimeleftforrecording.TheDVTH
dataloggercanbeprovidedwithaNIST
calibrationcertificate,andalsofeaturesa
tamper-proofdesigntomakeitasolution
forhighlyregulatedapplications.
Versatile
with
many
applications
Refrigerators; freezers; wine storage; medical facilities; greenhouses; florists; museums; docu-ment storage/archive facilities; laboratories; cigarhumidors;manymore.
Wide
measurement
range
Temperature operating range is –10 to 65ºC (15 to 150ºF); RH range is 0 to 99% non-condens-ing.
Built-in text and graphic display
Allows instant visual confirmation of current temperature, dew point, and RH, along with real time and historical trends and excursions.
On-board sample memory
Allows all data to be recorded over extended periods for later recall through the built-in displayorbyPCdownload.
Extended
sampling
intervals
Programmable sampling intervals range from one second to 18 hours in one second incre-mentsforveryfineandflexibletimeresolution.
Programmable
alarm
thresholds
Over/under alarms may be enabled for both temperature and RH to flag out-of-range condi-tions.
NIST traceable option
The DVTH can be provided with an NIST traceable certificate to satisfy contractual or regulatoryrequirements.
Delayed
start
selection
Allows the DVTH to initiate logging on its own at a specific date and time.
Built-in
real
time
clock
All acquired data is time and date stamped.
Tamper-proof
recordings
Unique serial number and session counter com-bine to ensure tamper-proof data recordings that satisfythemostdemandingrequirements.
Battery
operation
Low-power operation runs on three internal lithium or alkaline AA cells (included) for at least one year depending upon usage.
Automatic shutdown
When not configured to actively log data the DVTH will shut itself down after one hour to conserve battery power.
Memory
rollover
selection
Configure the DVTH to either stop recording when the memory is full, or rollover to over-writetheearliestrecordeddata.
Field-adjustable
calibration
Allows you to calibrate the DVTH yourself, or we can recalibrate the instrument for a nominal charge.
Integrated
USB
port
Connect the DVTH to any Windows-based PC for configuration, calibration, or data download.
PC
software
Provided Windows-based software allows DVTH configuration, calibration, download, and data graphical review and analysis.
Microsoft
Excel
export
Built-in data file translator allows data export to Microsoft Excel for further analysis and report generation.
*TheDVTHdataloggerconsumesmeremilliwattsofpowerinallmodes:
DVTH
Data
Logger
Close-up
Display-:Usethisbuttontodecreasethe screencontrastwheninSampleandSummary screens.WhenintheGraphscreenthisbutton shiftsthegraphtotheleft,allowingyoutoscan
backwardintimetoearlier-acquireddata. Units:Usethisbuttontochangethe displayedunitsbetween°Fand°C. Display+:Usethisbuttontoincreasethe screencontrastwheninSampleandSummary screens.WhenintheGraphscreenthisbutton shiftsthegraphtotheright,allowingyoutoscan towardmorerecentlyacquireddata.
View:Usethisbuttontotogglebetweenthe Graph,Summary,andSamplescreens.
Start:Iftheloggerhasbeensetuptostartonbutton press,pressandholdtheStartbuttontobeginlogging. IntheGraphscreen,pressingandholdingthisbutton returnstheviewtothelastsamplelogged.
Field-replaceablebatteries*:TheDVTHusesthreestandardAAcellsforpower.Usealkalinebatteriesfornormaltermmeasurementsorlithium batter-ieswhenverylong-termmeasurementsarerequired.
Maximumduringrecording 2.7mW
Standby 1.4mW
DVTH
Screens
Close-up
The Sample Screen
DisplaysthecurrentRelativeHumidity,TemperatureandDewPointmeasurements.Themeasurementsareupdatedeverytwo
seconds,independentofthedevicesamplerate.
MemoryRolloverEnabledIcon LoggerStateIcon
FreeMemoryIcon
BatteryLevelIcon
AlarmIndicator
The
Graph
Screen
Displaysloggeddatagraphicallytoshowtemperatureandrelativehumiditytrends.TheGraphScreenmaybepannedinapositiveor
negativetimedirectionusingthe(+)and(-)buttonswhilerecordingtoreviewhistoricaltemperatureandhumiditydata.
TemperatureGraph
LeftTimeStamp RightTimeStamp
Re
c
o
rdt
im
e
(d
a
y
s
)
DVTH
Screens
Close-up
(cont.)
The Summary Screen
Displaysthecurrentdataloggerconfigurationandprogress.Sampleintervalscanrangefromoncepersecondtoonceevery18hours
toyieldexceptionallylongrecordtimes(seegraph).
UserInformation
LoggingRateofthe DatainMemory
NumberofSamples StoredinMemory
TheLengthofthe DatainMemory
HowLongtheLoggerCan LogwithoutRollover
DVTH
Data
Logger
Record
Time
vs.
Sample
Interval
100,000 10,000 1,000 100 10 1 0
TempOnly Temp&RH
1 10 100 1,000 10,000 100,000
Included
PC
Software
General Setup
•SampleInterval(TotalRecording
Length):Selectthesampleinterval
fromapredefinedlistofintervals.
•CustomInterval:Clicktoaddyour
ownintervaltothesampleintervallist.
•EnableDataRollover:Checkthisbox
tohavetheloggercontinuouslyrecord
data,overwritingtheearliestdatawhen
theendofmemoryisreached.When
thisboxisnotchecked,loggingstops
whentheloggermemoryisfull.
•LoggingControl:Loggingcanstartin
threewaysdependingontheselection
youmake:
•ChannelstoLog:Choosetolog
temperatureonly,ortemperatureand
humidity
•UserInformation:Enteranytextyou
likeinthisbox.Thisfieldisusedto
identifytheloggertotheuser.You
canenterdescriptivelocation,serial
number,etc.
•AlarmSetup:Clickthisbuttontoopen
theAlarmSetupWindow.
Alarm Setup
Alarmsareusedtoindicatedataexcursionsbeyonddefinable
limits.TheDVTHdataloggerSampleScreendisplayindicates
Included
PC
Software
(cont.)
Data Review and Analysis
Afterdataisdownloadedfromthe
DVTHdataloggertotheprovided
PC-basedsoftwareitmaybe
graphicallyplottedversusdateand
timeofoccurrence,andlistedinadata
summaryalongwithalarmevents.It
canevenbefilteredbaseddefinable
uponexcursionlimitsandtimeand
dateofacquisition.
Export
to
Microsoft
Excel
®Ofcourse,fewanalysesarecompletewithouta
thoroughauditusingMicrosoftExcel,andDVTH
dataloggersoftwareexportsfilesthatarecompatible
Interval:
Userselectablefrom1secondto18hours,in
Compatibility:
Windows98SE,WindowsME,Windows2000,
Requirements:
5MBoffreediskspace,800×600screenreso- Logger Channels:
Userselectable.Disablingchannelsincreasesthe
DVTH
Data
Logger
Specifications
Text Display: Displaysrealtimetemperature,humidityand dewpoint.Displaysloggingsummary,sample rate,memoryusedandmemoryleft.
Graph Display: Showsmeasurementtrendsgraphically.Graph canbescrolledthroughtheentireloggeddata.
Sample Capacity: 43,344pointsfortemperatureonly.21,672 pointsfortemperature,humidityanddewpoint.
Programmable Sampling
1-secondincrements.
Alarms: Visualoverandunderalarmindicatorfor temperatureandhumidity.Dewpointalarmsare notavailable.
Calibration: Usersinglepointoffsetcalibrationis avail-ablethroughsoftwareforbothtemperatureand humidity.Calibrationispasswordprotected.
Operating Temperature: 15°Fto150°F(-10°Cto65°C)
Storage Temperature: -5°Fto160°F(-20°Cto70°C)
Time Accuracy: ±100ppm@75°F
Relative Humidity Range: 0%to99%RH,non-condensing.
Relative Humidity Accuracy: ±2%RH,from10%to90%RH
Relative Humidity Resolution: 0.01%RH
Temperature Accuracy: ±1°F(0.5°C)
Temperature Resolution: 0.01°For°C
Dimensions: 4"×3.05"×1.5"(10.2cm×7.7cm× 3.8cm)
PC Interface: USBport.USBcableisincluded
Weight: 7.0oz(200g)
Power Source: ThreeAAbatteries(included)
Power consumption: Maximumduringrecording: 2.7mW Standby:1.4mW
Powerdown:5.0µW
Battery Life: 1yearcontinuoususe,2yearsaverageuse. TheloggerautomaticallyturnsitselfOff after1hour,whennotlogging.TurnOnby pressinganybutton.
Software
Specifications
Data Security: UniquefactorysetloggerID.Recordingsession counter.Passwordprotectedcalibration.
Operating System
WindowsXPandabove.Notcompatiblewith WindowsNTorWindows95.
Minimum System
lution,1freeUSBport.
Recording Start: Onbuttonpress,immediateaftersetup,orata userspecifieddateandtime.
Recording Mode: Stoponmemoryfull,orcontinuousrecording withmemoryrollover
Real Time Status: VisualindicationthroughthestatusLED. Softwarerealtimestatus.
User Calibration: Passwordprotectedcalibrationforeachchannel.
User Information: Upto30characters
storagecapacityoftheotherchannels.
Units: USandMetric
Data Format: ExportabletotextorExcelfiles.
Ordering
Guide
Description OrderNo. Description OrderNo.
DataViewTemperatureandHumidity(DVTH)data
logger
Includes USB cable, three AA cell batteries, PC soft-wareonCD.
DVTH
NISTtraceablecalibrationcertificate
Must be purchased at the same time as the DVTH logger.
