vanEssen TD-Diver DI8 Series User manual

TD-Diver & Baro-Diver® DI8xx Series

©July2023VanEssenInstruments.Allrightsreserved. www.vanessen.com
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EssenInstruments B.V.
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CE COMPLIANCE STATEMENT (EUROPE)
Wehereby declare thatthedevice(s) describedbelow are inconformitywith the directives listed. In
the eventofunauthorized modification of any devices listed below, thisdeclaration becomes invalid.
Type: Datalogger
ProductModel: TD-Diver (DI801, DI802, DI805, DI810),Baro-Diver (DI800)
Relevant EC Directives and Harmonized Standards:
1999/5/EC R&TTE Directive for Radio andTelecommunications Terminal Equipment in accordance to
annexIII towhich this directiveconformto thefollowingstandards:
Low Voltage Directive per EN60950-1 (2006)+A11 (2011) forProduct Safety testing
standardfor"InformationTechnology Equipment"
EMC Directive EN 301 489-1 V1.8.1 / EN 301 489-17 V1.3.2 Electromagnetic emissionand
immunityfor"InformationTechnology Equipment"
2014/30/EU Electromagnetic Compatibility directive, as amended by EN61326-1:2013
Theproduct(s) to whichthisdeclaration relatesisinconformity withtheessential protection
requirements of 2014/30/EU Electromagnetic Compatibility directive. The products are inconformity
withthefollowing standardsand/orother normative documents:
EMC: Harmonized Standards: EN 61326-1:2013 Lab Equipment, EMC
IEC61000-6-3:2007 Emission standard for residential, commercial and light-industrial
environments
IEC61000-4-2:2009 Electrostatic dischargeimmunity test
IEC61000-4-3:2006 Radiated, radio-frequency, electromagnetic field immunity test
IEC61000-4-4:2012 Electrical fast transient/burst immunity test
IEC61000-4-5:2006 Surge immunity test
IEC61000-4-6: 2014 Immunity to conducted disturbances, induced byradio-frequency fields
IEC61000-4-11:2004 Voltage dips, short interruptions and voltage variations immunity tests
I hereby declarethat the equipment named above has beendesigned to comply withthe relevant
sections oftheabove referenced specifications. Theitems comply withall applicable Essential
Requirements of the Directives.

©July 2023VanEssenInstruments.Allrightsreserved. www.vanessen.com
Contents
1Introduction.........................................................................................................................................1
Aboutthis Manual ......................................................................................................................1
OperatingPrinciple....................................................................................................................1
MeasuringWater Level...............................................................................................................2
Measuring Temperature.............................................................................................................4
DiverModels...............................................................................................................................4
FactoryCalibration Procedure...................................................................................................5
2TechnicalSpecification .......................................................................................................................6
General .......................................................................................................................................6
Environmental............................................................................................................................7
Transportation ...........................................................................................................................7
Temperature...............................................................................................................................7
Pressure......................................................................................................................................8
SampleIntervaland Methods....................................................................................................9
3DiverInstallation and Maintenance..................................................................................................10
Introduction .............................................................................................................................10
Configuring and Readingthe Diver..........................................................................................10
Installation ina MonitoringWell..............................................................................................13
Installation in Surface Water....................................................................................................13
Use of Diversat VaryingElevation ...........................................................................................14
Baro-Diver.................................................................................................................................14
UseinSeawater........................................................................................................................14
Maintenance.............................................................................................................................15
4AppendixI Use of Divers atVaryingElevation................................................................................16
5AppendixII DiverCommunication Protocol...................................................................................17
Introduction .............................................................................................................................17
SerialPort Settings...................................................................................................................17
FrameFormat...........................................................................................................................17
List of Commands ....................................................................................................................18
6AppendixIII Diver Accessories........................................................................................................23
Diver-Office software ...............................................................................................................23
USBReadingUnit.....................................................................................................................23
Stainless Steel Cable................................................................................................................23
Cable Clip..................................................................................................................................24
Smart InterfaceCable ..............................................................................................................24
Communication Cable .............................................................................................................24
Diver-Mate ................................................................................................................................25
Diver-Link .................................................................................................................................25

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1
1Introduction
The TD-Diver is a compact, groundwater monitoring instrument for continuously measuring level and
temperature in groundwater, surface water, and industrial waters. Thedatacollectedcan be usedto
manage water resources, estimate hydraulic conductivity andother aquifer conditions. Examples of
applications are:
•monitor potable water recharge areas for water supply,
•monitor tailingsponds, dewatering activitiesand water supply levelsof mines,
•general site investigations for construction, and
•contaminant plume monitoring on spill sites, remediation sites, chemical storage facilities,
landfillsitesandhazardouswaste storagesites.
The TD-Diver is aneasy-to-use dataloggerfeaturing state-of-the-art electronics and arobust high
precision pressure sensor for long term accuracy. The absolutepressure sensor requires minimal
maintenanceand re-calibration.
TheDiver®isa dataloggerhousedina cylindrical casingwitha suspensioneyeatthetop. The
suspension eye can be unscrewed and is designedto installtheDiver into the monitoring well. The
suspension eye alsoprotects the optical connector. Theelectronics, sensors andbattery are installed
maintenance-free into the casing. The Diver is notdesigned to be opened.
The name ofthe datalogger, the model number, the measurement range and theserial number are
clearly identified on the sideof the Diver. This information is etched using a laser and is consequently
chemically neutral and not erasable.
AboutthisManual
This manualcontains information about Van EssenInstruments TD-Diverwith part numberDI8xx, see
section2.5,and Baro-Diver® with part number DI800, an instrument designedtomeasure
groundwater levels and temperature and atmospheric pressure andtemperature, respectively.
2contains
thetechnical specificationsfor the TD-Diver andBaro-Diveras well as guidelinesfor Diver
maintenance. Chapter 3covers thedeploymentof Divers. ThisincludesprogrammingtheDiverwith
theDiver-Office software. Subsequently,installation of Diversinmonitoring wellsandinsurface water
is discussed. There are three appendices that describe the useof Divers at varying elevation, the Diver
communication protocol and a list of Diver accessories.
OperatingPrinciple
TheDiverisa dataloggerdesigned to measurewater pressureandtemperature. Measurementsare
subsequently stored in the Diver's internalmemory. The Diver consistsofa pressure sensor designed
to measure waterpressure, a temperature sensor, anda battery that powers the electronics that takes
and storesthemeasurements. TheDiverisan autonomous datalogger thatcan beprogrammed by
the user. The Diverhas a completely sealed enclosure. The communication between Divers and
Laptops/field devicesisbased onopticalcommunication.
The Divermeasures theabsolute pressure. Thismeans that thepressure sensor notonly measures the
water pressure, but alsothe air pressure pushing onthe water surface. Ifthe air pressure varies, the
measured water pressure will thus also vary, withoutvarying the water level. The air pressure can be

©July 2023VanEssenInstruments.Allrightsreserved. www.vanessen.com
2
measuredby a Baro-Diverand subsequentlybeused in theDiver-Officesoftware to converttheDiver
pressure readings intowater level data.
MeasuringWaterLevel
All Divers establish theheight of a water column bymeasuring the water pressure using thebuilt-in
pressure sensor. As long as the Diverisnot submerged inwater itmeasures atmospheric pressure, just
higher thewater column thehigherthemeasured pressure. Theheight ofthewater columnabovethe
Diver's pressure sensor isdetermined based on the measured pressure.
Tomeasurethese variationsin atmosphericpressure a Baro-Diverisinstalled for eachsite being
measured. The barometric compensation for these variations in atmospheric pressure can be done
usingtheDiver-Officesoftware, seewww.vanessen.com fora free download.It is also possibletouse
alternative barometric datasuch as data madeavailable online.
The barometrically adjusted water values can be related to a reference point such as the top ofthe
monitoring well or Mean Sea Level (MSL) or anyother vertical reference datum.
1.3.1 Converting DiverDataintoWaterLevel
This section explains howtocalculate thewater level inrelation to averticalreference datum using
theDiverandBaro-
The figurebelow represents an example ofa monitoring well inwhich aDiverhas been installed. In
this case weare therefore interested in the height of the water level(WL) inrelation to the vertical
reference datum. If thewater level is situated abovethe reference datum ithas apositive valueanda
negative value ifitis situated below thereference datum.
Thetopofcasing (TOC)ismeasured in relationtothe verticalreferencedatum andisdenoted inthe
diagrambelow as TOC. TheDiver is suspendedwitha cablewithalength CL. Ifthecable length is not
exactly known, itcan be calculated from a manualmeasurement as described in section 1.3.2.
TheBaro-Diver measuresthe atmosphericpressure (pbaro) and the Diver measures thepressure
exerted by the water column (WC) abovethe Diver and the atmospheric pressure (pDiver).

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3
The water column (WC) abovethe Diver can be expressed as:
   
 (1)
wherepisthepressure incmH2O, g istheacceleration due togravity (9.80665m/s2) and ρisthe
densityofthewater (1,000kg/m3).
Thewaterlevel (WL) in relationtotheverticalreference datumcanbecalculated as follows:
     (2)
BysubstitutingWC from equation(1)inequation (2) we obtain:
     
 (3)
1.3.2 Calculating theCableLengthfromaManualMeasurement
If thecable length is not exactly known, it canbe determined using amanualmeasurement, see the
figurebelow. The manual measurement(MM)istaken fromthetopofcasing to thewater level. The
valueofthe water levelispositiveunless, inexceptionalcircumstances, thewater level issituated
above thetop of casing.
Thecablelength cannowbecalculatedas follows:
     (4)
where thewater column (WC)iscalculated based onthe measurements takenby the Diver andthe
Baro-Diver.
Notes:
•Ifthepressuremeasured bythe Diver andtheBaro-Diver is measuredat different points in
time, itis necessary to interpolate. The Diver-Office software automatically performsthis
interpolation.
•It is possibleto enter manual measurements into the Diver-Office software. The software
subsequently automaticallycalculates thecable length.
1.3.3 Example
The top ofcasing is measured to be150 cm above the Mean Seal Level (MSL): TOC = 150 cm. The cable
length is notexactly known and therefore a manual measurement is taken. It turns out to be120cm:
MM =120 cm.

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4
TheDivermeasures apressureof1,170 cmH2O and the Baro-Diver measuresa pressure of 1,030
cmH2O. Substituting thesevalues intoequation (1), results ina watercolumnof 140cm abovethe
Diver:WC= 140cm.
Substitutingthe values of the manualmeasurement and thewater columninequation (4) results in
thefollowing cablelength:CL =120 +140 =260 cm.
Thewaterlevel in relationto MSL can now beeasily calculated using equation (2): WL= 150 260 +
140 =30 cm aboveMSL.
MeasuringTemperature
AllDivers measure the groundwater temperature.This can,forexample, provideinformation about
groundwater flows.
Thetemperature is measured usinga semiconductor sensor. Thissensor notonly measures the
temperature, but also usesthe value ofthe temperature at the same time tocompensate the pressure
sensor andelectronics for theeffects of temperature to ensurethe best possible performance.
DiverModels
The Diver models described inthis manual are from the DI8xx Series: the TD-Diver and theBaro-Diver.
Both models measure absolutepressure andtemperature. The summarybelow describes the two
models.
TD-Diver
ThisDiverismanufacturedusing a stainlesssteel(316 L) casingwith a
22mmdiameter. The TD-Diver is capable of storinga maximum of
72,000 measurements (date/time, pressureand temperature) in its
working memory and 72,000 measurements in itsbackup memory.
The TD-Diver samples pressure and temperature at fixed length
intervalsandstores thesevalues in fixed lengthor continuousmemory.
The TD-Diver is availableinthefollowingpressureranges: 10 m, 20m,
50m and100 m.
Baro-Diver
The Baro-Diver is manufactured using a stainless steel (316 L) casing
witha 22mm diameter. The Baro-Diveriscapableof storing amaximum
of 72,000 measurements (date/time, pressure andtemperature) in its
working memory and 72,000 measurements in itsbackup memory.
TheBaro-Diver measuresatmosphericpressureand is usedto
compensatefor the variations in atmosphericpressure measured by the
otherDivers. The Baro-Diver can also be usedformeasuringshallow
waterlevelsupto 1 meter.
TheBaro-Diver samples pressure and temperature at fixedlength
intervalsandstores thesevaluesinfixed length orcontinuous memory.

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5
FactoryCalibrationProcedure
Each Diveris individually calibrated andtested at severaltemperature andpressure values toensure
superior performance. The Diver is calibrated for the lifetime of theinstrument, as long as it isused
within itsspecified range. A calibration certificate isavailable upon request.

©July 2023VanEssenInstruments.Allrightsreserved. www.vanessen.com
6
2TechnicalSpecification
General
The Baro-Diver is used foratmospheric pressure and temperature measurements. There are four TD-
Diver models withdifferent pressure ranges forpressure and temperaturemeasurements. The table
belowliststhe generalspecifications oftheBaro-Diverand TD-Diver.
Diameter
Ø 22mm
Length(incl. suspension
eye)
~110mm
Weight
~104grams
Materials
Casing
Pickledandpassivated 316L stainless steel
Pressure sensor
Alumina(Al2O3)
Suspension eye
nosecone
NylonPA6glass fiberreinforced 30%
ABS
O-rings
Viton®
Communication
Interface
Optically separated
Protocol
Serial RS232, a limited set ofcommands is available as specified inAppendix
II
Memory capacity
144,000 measurements
working
72,000 measurements
backup
72,000 measurements
Memory
Non-volatilememory.A measurementconsists of
date/time/pressure/temperature
continuous and fixed length memory
Batterylife*
Upto 10 years, dependingon use
Theoretical battery
capacity
10.5 millionmeasurements + 1000× fullmemory readouts +
2000× programming
Clockaccuracy
Better than ±1 minute per year at25 C
Better than ±5 minutes per yearwithin the operating temperature range
CE marking
EMCinaccordance withthe 89/336/EECdirective
Basic EN 61000-4-2 standard
Emissions
EN 55022 (1998) +A1 (2000) + A2 (2003), Class B
Immunity
EN 55024 (1998) +A1 (2000) + A2 (2003)
*The Diver is always in stand-by when not making a measurement. The power consumption of the
integrated battery is dependent on thetemperature and usage.