NitraVis 700/1 IQ TS Set NitraVis 700/5 IQ TS Set - Fagerberg

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NitraVis 700/1 IQ TS Set NitraVis 700/5 IQ TS Set - Fagerberg

ContentsNitraVis 700/x IQ TS5.2.1 Exterior cleaning . . . . . . . . . . . . . . . . . . . . . . . .5-15.2.2 Compressed-air driven cleaning of themeasurement windows . . . . . . . . . . . . . . . . . . .5-25.3 Exchange of components . . . . . . . . . . . . . . . . . . . . . . . .5-25.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-26 Replacement parts, maintenance equipment,accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17 What to do if... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-17.2 Function check of the cleaning function . . . . . . . . . . . . .7-58 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-18.1 Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-18.1.1 General data . . . . . . . . . . . . . . . . . . . . . . . . . . .8-18.1.2 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . .8-28.1.3 Measurement conditions . . . . . . . . . . . . . . . . . .8-28.1.4 Measuring ranges and resolution . . . . . . . . . . .8-38.2 MIQ/VIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-48.3 MIQ/CHV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-59 Indexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-19.1 Explanation of the messages . . . . . . . . . . . . . . . . . . . . .9-19.1.1 Error messages . . . . . . . . . . . . . . . . . . . . . . . . .9-19.1.2 Info messages . . . . . . . . . . . . . . . . . . . . . . . . . .9-39.2 Status info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-410 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-110.1 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-10 - 2


OverviewNitraVis 700/x IQ TS Set1.2 Field of applicationThe NitraVis 700/x IQ TS Set is an online measuring system for the insitudetermination of nitrate and total suspended solids (TSS) in wastewater treatment plants. The range of application comprises control,feedback control and monitoring.Measuring locationsNitraVis 700/1 IQ TS:NitraVis 700/5 IQ TS:Inlet or aeration tankOutletCompressed-aircleaningThe NitraVis 700/x IQ TS Set is equipped with a compressed-airoperated cleaning system for the sensor. It works effectively andwithout side-effects. The cleaning system is maintenance and wearfree.1.3 Measuring principle of the UV/VIS sensorThe UV/VIS sensor operates according to the measuring principle ofUV/VIS spectrometry.Any substance contained in a measuring solution attenuates a lightbeam that penetrates the measuring solution. The attenuation(absorbance) of the light beam is measured for different wavelengths.The wavelength dependent distribution produces the absorbancespectrum.ConcentrationmeasurementsTotal suspended solidsmeasurementThe wavelength range where an absorbance occurs characterizes thesubstance. The amount of the substance determines the extent of theabsorbance.Solid particles in the solution scatter light in all directions. Thus the lightbeam leaving the measuring solution is attenuated. The attenuationoccurs at all wavelengths.The influence of typical interference matrix variants occurring atmunicipal waste water treatment plants can be eliminated by includingthe entire absorbance spectrum.With this measuring principle, measuring does not take placecontinuously but at intervals.1 - 2


OverviewNitraVis 700/x IQ TS Set1.5 Overview of the NitraVis 700/x IQ TS SetThe following overview shows the integration of theNitraVis 700/x IQ TS Set in the IQ SENSOR NET.Fig. 1-3The NitraVis 700/x IQ TS Set in the IQ SENSOR NET1.6 Instrument identificationA name plate with the exact designation and series number of the UV/VIS sensor is fixed on the sensor cable. The name plates of theIQ SENSOR NET modules are on the lateral outside of the enclosures.1 - 4


NitraVis 700/x IQ TS SetSafety2 SafetyThis component operating manual contains special instructions thatmust be followed in the operation of the NitraVis 700/x IQ TS Setsensor. Thus, it is essential to read this component operating manualbefore carrying out any work using this sensor. In addition to thismanual, the SAFETY chapter of the IQ SENSOR NET system operatingmanual must be followed.Always keep this component operating manual together with thesystem operating manual and any other component operating manualsin the vicinity of the IQ SENSOR NET system.Special userqualificationsGeneral safetyinstructionsTheNitraVis 700/x IQ TS Set was developed for applications in onlinemeasurement - essentially in the field of wastewater treatment. Thus,we assume that the operators are familiar with the necessaryprecautions to take when dealing with chemicals as a result of theirprofessional training and experience.Safety instructions of this operating manual can be recognized by thewarning symbol (triangle) in the left-hand column. The signal word (e.g."Caution") indicates the danger level:Warningindicates instructions that must be followed precisely in order toprevent serious dangers to persons.Cautionindicates instructions that must be followed precisely in order toavoid slight injuries or damage to the instrument or theenvironment.Other labelsNoteindicates notes that draw your attention to special features.Noteindicates cross-references to other documents, e.g. operatingmanuals.2 - 1


SafetyNitraVis 700/x IQ TS Set2.1 Authorized useThe authorized use of the NitraVis 700/x IQ TS Set comprises its useas a sensor in the IQ SENSOR NET.The technical specifications according to chapter 8 TECHNICAL DATAmust be observed. Only operation according to the instructions given inthis operating manual is considered to be authorized.Any other use is considered to be unauthorized. Unauthorized useinvalidates any claims with regard to the guarantee.CautionOnly operate the sensor together with the MIQ/VIS connectionmodule.2.2 General safety instructionsThe sensor left the factory in a safe and secure technical condition.Function andoperational safetyThe failure-free function and operational safety of the sensor is onlyguaranteed if the generally applicable safety measures and the specialsafety instructions in this operating manual are followed during its use.The failure-free function and operational safety of the sensor is onlyguaranteed under the environmental conditions that are specified inchapter 8 TECHNICAL DATA.The specified temperature (see chapter 8 TECHNICAL DATA) must bemaintained during the operation and transport of the sensor. Protectthe sensor, particularly against frost or overheating.CautionThe sensor may only be opened by specialists authorized byWTW.2 - 2


NitraVis 700/x IQ TS SetSafetySafe operationIf safe operation is no longer possible, the sensor must be taken out ofoperation and secured against inadvertent operation.Safe operation is no longer possible if the sensor: has been damaged in transport has been stored under adverse conditions for a lengthy period oftime is visibly damaged no longer operates as described in this manual.If you are in any doubt, contact the supplier of your sensor.Obligations of theoperatorThe operator of the sensor must ensure that the following rules andregulations are followed when dealing with hazardous substances: EEC directives for protective labor legislation National protective labor legislation Safety regulations Safety data sheets of the chemical manufacturer.2 - 3


SafetyNitraVis 700/x IQ TS Set2 - 4


CarboVis 700/5 IQ SetCommissioning3 Commissioning3.1 System requirements of the IQ SENSOR NETSoftware versions of thecontroller and terminalcomponentsThe operation of the CarboVis 700/5 IQ requires the following softwareversions in the IQ SENSOR NET: MIC/C184 Controller software: Version 2.66 or higherTerminal software:Version 2.66 or higher MIQ/MC Controller software: Version 2.66 or higher MIQ/T 2020 Terminal software: Version 2.66 or higher IQ Software Pack Software version:4.10 or higher3.2 Scope of deliveryThe following parts are contained within the scope of delivery of theCarboVis 700/5 IQ Set: UV/VIS sensor CarboVis 700/5 IQ with cable (15 m) MIQ/VIS connection module and MIQ/CHV valve module. Bothmodules are preassembled with a ready-wired valve control line.All openings and open electrical contacts must be closed withsuitable covers or blank covers. MIQ module assembly material:– 6 x cable glands with seal– 6 x ISO blind nuts M4– 6 x cheese-head screws M4x16 with plastic washer– 1 x contact base with suitable screws 15.5 m compressed-air hose with screwed joint and hose clip, readyto be connected to the sensor and valve module Sensor sleeve Protective ring Operating manual3 - 1


CommissioningCarboVis 700/5 IQ Set3.3 Installation3.3.1 Main steps for installationCautionThe sensor may only be electrically connected to the MIQ/VISmodule while the module is not supplied with voltage (dead).The following steps are required to install the CarboVis 700/5 IQ Set: Make sure that there is enough system power available in theIQ SENSOR NET (see IQ SENSOR NET system operating manual).NoteThe CarboVis 700/5 IQ Set requires altogether 9 W power:CarboVis 700/5 IQMIQ/VISMIQ/CHV6.5 W0.5 W2 W Make sure that the allowed maximum cable length to the next powersupply module is not exceeded (see system operating manual). Connect the compressed-air hose to the CarboVis 700/5 IQ (seesection 3.3.4). Mount the sensor (see section 3.3.2) Connect the compressed-air hose to the MIQ/CHV (see section3.3.4). Connect the MIQ/CHV to the compressed-air supply. Connect the module stack (MIQ/VIS + MIQ/CHV) to theIQ SENSOR NET (see section 3.3.3). Connect the sensor to the MIQ/VIS (see section 3.3.5). Carry out a function check of the cleaning function (see section 7.2).3 - 2


CarboVis 700/5 IQ SetCommissioning3.3.2 Mounting the sensorCautionThe sensor is an optical precision instrument that is to beprotected against shocks. Make sure the distances to the wall,bottom and other installation surroundings are sufficient. Ifnecessary, protect the sensor from hitting by the protective ringprovided.CautionAlways make sure that the surface of the enclosure is notdamaged by sharp-edged objects. The enclosure of the sensormay not touch any metallic objects in order to prevent contactcorrosion.CautionDo not suspend the sensor on the sensor connection cable.A wide range of mounting accessories is available for the installation ofthe CarboVis 700/5 IQ (see chapter 6 REPLACEMENT PARTS,MAINTENANCE EQUIPMENT, ACCESSORIES). Thus, all prevalent ways ofmounting are possible.Generally, observe the following general rules when mounting thesensor at the measuring location:Horizontal installationWhen mounting the sensor horizontally, the measuring gap openingshould be on the side. Thus, the compressed air can escape upwardafter cleaning and no sediment can collect in the measuring gap. Thesensor should be aligned in parallel with the flow direction.Fig. 3-1Horizontal installation3 - 3


CommissioningCarboVis 700/5 IQ SetVertical installationWhen mounting the sensor vertically, make sure that interferingelements in the measuring gap (e.g. air bubbles from the compressedaircleaning) can escape with the flow. In the case of verticalinstallation, the minimum flow rate is 0.2 m/s if the measuring gapshould be kept clean optimally.Fig. 3-2Vertical installationProtective ringWhen installing the sensor, always make sure it cannot knock againsta wall or another obstacle.Make sure the safety margins are sufficient (e.g. with suspendedmounting). If this is not possible due to the conditions at the installationlocation, protect the sensor end by the protective ring supplied.Fig. 3-3Mounting the protective ring3.3.3 Connecting the module stack (MIQ/VIS + MIQ/CHV)to the IQ SENSOR NETThe IQ SENSOR NET offers a variety of options to connect the modulestack to the system (stack mounting, distributed mounting, etc.). Theindividual types of installation are described in detail in theINSTALLATION chapter of the system operating manual.3 - 4


CarboVis 700/5 IQ SetCommissioning3.3.4 Connecting the compressed-air hoseGeneral instructionsPay attention to the following instructions when connecting thecompressed air hoses: Follow the specification of the compressed air according to chapter8 TECHNICAL DATA. Only use the mounting material provided to connect the compressedair.Mounting thecompressed-air hose onthe sensor131MIQ/CHV2Fig. 3-4Mounting the compressed-air hose on the sensor1 Pull the adhesive tape off the screwed joint. When doing somake sure to keep the two white sealing rings (1).2 As shown in Fig. 3-4, position the screwed joint at the sensorwith the aid of the screw (2) and the two sealing rings (1) andcarefully screw it tight. Orient the screwed joint so that thecompressed-air hose can be led to the MIQ/CHV along thesensor suspension.Caution: Tighten the screw moderately only to avoid damagingthe thread in the sensor.3 Run the compressed-air hose to the MIQ/CHV and cut it off ata suitable length if necessary. To prevent foreign bodies fromgetting caught, use cable ties at sufficiently short distances toattach the hose to the sensor and sensor suspension.3 - 5


CommissioningCarboVis 700/5 IQ SetConnecting thecompressed-air hose tothe MIQ/CHVMIQ/CHV54UV/VIS-SensorFig. 3-5Connecting the compressed-air hose to the MIQ/CHV4 Connect the other end of the compressed-air hose (4) to thecompressed-air outlet of the MIQ/CHV. Secure the connectionwith a hose clip (5).Note on opening thecompressed-air linePay attention to the following safety instruction if you want to open thecompressed air line (e.g. during a modification):WarningDanger of injury from lines that are under pressure. Beforeopening the compressed air line, ensure that the section of lineconcerned is free of pressure. The compressed air glands in thehousing of the MIQ/CHV may only be opened by a servicetechnician authorized by WTW.3 - 6


CarboVis 700/5 IQ SetCommissioning3.3.5 Connecting the sensorCautionThe sensor may only be electrically connected to the MIQ/VISmodule while the module is not supplied with voltage (dead).CautionA UV/VIS sensor CarboVis 700/5 IQ may only be connected to theIQ SENSOR NET via a MIQ/VIS module. Otherwise, the sensor willbe damaged.Connecting the sensorcable1 Open the MIQ/VIS module.2 Connect the sensor to the terminal strip of the MIQ/VIS.The cable colors must agree with the colors of the terminallabeling. The terminal labeling is on the bottom of the module.3 Close the MIQ/VIS module.Fig. 3-6Connecting the UV/VIS sensor in the MIQ/VIS3 - 7


CommissioningCarboVis 700/5 IQ Set3.4 Initial commissioning3.4.1 General informationWarningNever look into the measuring window or put objects into themeasuring window during operation! The emitted UV radiationcan damage the eyes!In the case of authorized use, inadvertent eye contact with thelight beam is not possible.The sensor is prepared for operation in the aeration tank and calibratedin the factory. The sensor is immediately ready to measure. For use inthe inlet you only have to change the Measuring location setting.The compressed-air cleaning function is switched on in the factory. Thefirst measuring cycle (cleaning and measuring) starts after initializingthe sensor in the IQ SENSOR NET.NoteHow to adjust the settings is described in the following section (section3.4.3).Calibration after initialcommissioningOn the basis of a reference measurement ("laboratory value"), checkwhether the default settings deliver sufficiently accurate measuredvalues or whether you want to carry out a user calibration. If demandson the measuring accuracy are high, you should always carry out aSensor check/Zero adjustment and a user calibration after the initialcommissioning (see section 4.4 CALIBRATION).3 - 8


CarboVis 700/5 IQ SetCommissioning3.4.2 Structure of the sensor: Main sensor and secondarysensorThe physical sensor is the sensor with the instrument or modeldesignation, CarboVis 700/5 IQ. The physical sensor processes themeasurement signal (absorbance spectrum) and supplies 2measurement results to the IQ SENSOR NET. The measurement resultsare administrated like 2 sensors that differ in hierarchy as follows: The sensor for nitrate measurement is the main sensor. It registerson the system under the designation, NitraVis 700/x IQ and theseries number of the physical sensor. The main sensor is alwaysactive, i.e. it always appears in the measured value display and inthe list of sensors. The sensor for the measurement of total suspended solids is thesecondary sensor. It registers on the system under thedesignation, SolidVis 700/x IQ and the series number of thephysical sensor. The secondary sensor is only active if it was set toactive in the setting menu of the main sensor. Only then it appearsin the measured value display and only then can the settings for thesecondary sensor be edited. In the default condition, the secondarysensor is inactive.Sensor overlappingsettings and functionsSome settings and functions are sensor overlapping. Sensoroverlapping settings are generally edited in the setting menu of themain sensor.These are the most important sensor overlapping settings andfunctions: Measuring location Times of the measuring cycle (Meas. interval, Cleaning duration,Adjustment phase etc.) Signal smoothing Output of the software version with the Transmit to log bookcommandNoteDetails on sensor overlapping functions are given in the followingsection.3 - 9


CommissioningCarboVis 700/5 IQ Set3.4.3 Settings of the main sensorMeasuring cycleA measuring cycle consists of the cleaning duration, the adjustmentphase for the measuring system and the determination of themeasured value. The following graphic demonstrates the relevantsettings:Fig. 3-7Measuring cycle of the UV/VIS sensorNoteDefault values are marked in bold. Sensor overlapping settings are ona gray background in the following table. All other settings areexclusively for the main sensor.Menu item Settings ExplanationsMeasuring mode NO3-N NO3 NO3-N standardThe measured variable is displayed in theselected citation form.The NO3-N standard setting is used forthe sensor check with nitrate standardsolutions (see section 4.4.4). In thismeasuring mode, the sensorautomatically measures with the smallestpossible measuring interval. The cleaningfunction and adjustment phase are notactive in this mode. All ineffective settings(measuring interval, cleaning duration andadjustment phase etc.) are hidden.3 - 10


CarboVis 700/5 IQ SetCommissioningMenu item Settings ExplanationsMeasuring locationNitraVis 700/1 IQ: Activation InletNitraVis 700/5 IQ: Outlet(permanently set)Measurement location or application ofthe sensor.The sample matrix the calculation of themeasured value is based on changes withthe location of the sensor. This setting isnot available for the Measuring modeNO3-N standard.Measuring range - Display of the measuring range(see chapter 8 TECHNICAL DATA).Cal - # raw value 1Cal - ref. value 1Cal - # raw value 2Cal - ref. value 2Value pairs of the user calibration (see section 4.4.2). These settingsare not available for the Measuring mode NO3-N standard.Note: Leave those values unchanged during the initialcommissioning.Ref. time (h) 0 ... 12 ... 23 h Time at which a measuring cycle isRef. time (min) 0 ... 59 minstarted. Further measuring cycles takeplace at intervals according to thespecified measuring interval.Meas. interval Minimum, 5 10, 15, 30,60 minRepetition of the measuring cycle at thespecified interval.Signal smoothing On OffWith the Minimum setting, the sensorautomatically calculates the shortestpossible measuring interval taking intoaccount the settings for Cleaning durationand Adjustment phase. When the settingsare quit with Save and quit, a log bookmessage is generated that quotes thecalculated time.Switching on/off the signal smoothing.For more details, see Response time t90.This menu item is only available if theMeas. interval is set to Minimum.3 - 11


CommissioningCarboVis 700/5 IQ SetMenu item Settings ExplanationsResponse time t90 10 ... 60 min Response time of the signal smoothingfunction.Depending on the sample matrix,measured values can vary more or lessstrongly (e.g. due to foreign matter or airbubbles).The signal filter reduces the limits ofvariation of the measured value. Thesignal filter is characterized by theResponse time t90. This is the time afterwhich 90 % of a signal change isdisplayed.Cleaning mode On OffSwitching on/off the automatic, timecontrolledcompressed-air cleaningfunction.Cleaning duration 5, 10, 15, 20, 30, 60 s,orAuto maximumDuration of the cleaning process.When Auto maximum is set, thecompressed-air cleaning system workswith maximum cleaning power. Thecleaning duration starts directly after themeasured value determination and endswhen the next adjustment phase begins(see Fig. 3-7).Adjustment phase 5 ... 10 ... 30 s The Adjustment phase setting is requiredto provide a time interval between thecleaning process and the nextmeasurement. After the compressed-aircleaning, air bubbles can possibly escapefrom the hose and interfere with themeasurement.Meas. betw.cleaning 1 ... 10 Number of measurements between twocleaning processes. We recommend thesetting 1, i.e. a cleaning procedure takesplace before each measurement.TSS sensor Not active ActiveThe Active setting sets the TSS sensor(secondary sensor) to active. The TSSsensor has a separate setting menu (seesection 3.4.4). To be able to edit thesettings of the TSS sensor you have toswitch to the measuring mode first.3 - 12


CarboVis 700/5 IQ SetCommissioningMenu item Settings ExplanationsSoftware versions Do not download Transmit to log bookGenerates a log book message with allrelevant software states of the sensor onleaving the settings with Save and quit(see section 3.5). When the menu isopened again, the setting is reset to Donot output.Save and quit - The system confirms the saving of thesettings and the display switches to thenext higher level.Quit - The display switches to the next higherlevel without saving the new settings.Carrying out settings1 Switch to the measured value display with m.2 Open the Settings menu with s.3 Select and confirm the menu item Settings of sensors and diff.sensors -> Measuring range column with d and g.4 Select the UV/VIS sensor with d.Fig. 3-8140 - Settings of sensors and diff. sensors5 Confirm the selection with g.The settings of the sensor are displayed.3 - 13


CommissioningCarboVis 700/5 IQ Set(Example:NitraVis 700/1 IQ)Scroll with d toshow these settingsFig. 3-9140 - Settings of sensors and diff. sensors (Main sensor)6 Make the sensor settings with d and confirm each of themwith g.7 Select the Save and quit menu item with d and confirm withg. The new settings are stored in the IQ SENSOR NETcontroller.3 - 14


CarboVis 700/5 IQ SetCommissioning3.4.4 Settings of the secondary sensor(TSS measurement)To be able to edit the settings for the secondary sensor, the secondarysensor must be set to active in the setting menu of the main sensor.Then you have to switch to the measuring mode so that the sensorregisters on the IQ SENSOR NET (see the following diagram).Setting the secondarysensor to activeFig. 3-10Setting the secondary sensor to active3 - 15


CommissioningCarboVis 700/5 IQ SetSettingsThe setting menu of the TSS sensor contains the following settings:NoteDefault values are marked in bold. The operating steps for the settingare given in section 3.4.3.Menu item Settings ExplanationsMeasuring mode TSS Display of the measuring mode(TSS = total suspended solidsmeasurement)Measuring range - Display of the measuring range(see chapter 8 TECHNICAL DATA).Cal - # raw value 1Cal - ref. value 1Cal - # raw value 2Cal - ref. value 2Value pairs of the user calibration for TSS measurement (see section4.4.2).Note: Leave those values unchanged during the initialcommissioning.Further settings NitraVis SNxxx ?? Information that there are further sensoroverlapping settings in the setting menu ofthe relevant main sensor (Meas. interval,Cleaning duration, Signal smoothingetc.).Save and quit - The system confirms the saving of thesettings and the display switches to thenext higher level.Quit - The display switches to the next higherlevel without saving the new settings.Fig. 3-11140 - Settings of sensors and diff. sensors (Secondary sensor)3 - 16


CarboVis 700/5 IQ SetCommissioningSetting the secondarysensor to inactiveIf you want to hide the secondary sensor in the measured value display,set the TSS sensor to Not active in the setting menu.Fig. 3-12Setting the secondary sensor to inactiveThe settings for the secondary sensor and all links with outputs remainstored as an inactive dataset (measured value display, "ERROR").When the sensor is reactivated, the settings are automaticallyreassigned. If you want the secondary sensor to be permanently3 - 17


CommissioningCarboVis 700/5 IQ Setinactive you can erase the inactive dataset from the list of sensors.Thus, the secondary sensor will disappear from the measured valuedisplay and all settings and links will be erased.3.5 Reading out software versionsIn the IQ SENSOR NET system, the CarboVis 700/5 IQ Set registerswith the following active components: NitraVis 700/x IQ (main sensor) SolidVis 700/x IQ (secondary sensor if active) MIQ/VIS (connection module)The sensor appears in the list of sensors with the series number of thephysical sensor (according to name plate).Software versions of thesensorSoftware version of theMIQ/VISThe sensor has a separate software (measured value algorithm) foreach measuring mode and measuring location. All relevant softwareversions can be output via a log book message. To do so, open theSettings of sensors and diff. sensors menu for the UV/VIS sensor andselect the Transmit to log book option in the Software versions line (seesection 3.4.3).The software version of the MIQ/VIS can be displayed with the aid ofthe service function, List of all components. The function can be foundin the Settings menu under Service (see system operating manual).3 - 18


NitraVis 700/x IQ TS SetMeasuring / operation4 Measuring / operation4.1 Determination of measured valuesFig. 4-1Determination of measured valuesDuring a measurement, the absorbance spectrum of the test sample isrecorded and set against the stored absorbance spectrum of a zeroadjustment (measurement in ultrapure water). The algorithm for thecalculation depends on the selected application and/or the measuringlocation. The resulting raw value can be adjusted to an independentreference measurement with the aid of a so-called user calibration.4 - 1


Measuring / operationNitraVis 700/x IQ TS Set4.2 Data structureThe following diagram shows which data is stored where physically.Settings and data that are stored in the IQ SENSOR NET controller areautomatically allocated to the new components when the sensor orMIQ/VIS is exchanged.Fig. 4-2Determination of measured values4 - 2


NitraVis 700/x IQ TS SetMeasuring / operation4.3 Measurement operationWarningNever look into the measuring window or put objects into themeasuring window during operation! The emitted UV radiationcan damage the eyes!In the case of authorized use, inadvertent eye contact with thelight beam is not possible.Measured value displayRaw value,identifiable by #Measured valueFig. 4-3 NitraVis 700/x IQ TS in the measured value display with main andsecondary sensorFactors affecting themeasured valuesThe following factors can affect the measurement quality: The measuring gap is not sufficiently filled and flowed through bytest sample Foreign matter and air bubbles are in the measuring gap Extraordinary changes (interferences) of the sample matrix The measurement windows are contaminated due to a too lowcleaning efficiency Failure of compressed air supply Damaged measurement windows Lacking quality of the zero adjustment, e.g. due to contaminatedultrapure water The user calibration is not representative (or erroneous)4 - 3


Measuring / operationNitraVis 700/x IQ TS Set4.4 Calibration4.4.1 OverviewIn the delivery condition, the sensor is precalibrated and ready tomeasure (see section 3.4.1).There are two types of calibration that are included into the calculationof the measured value at entirely different points (see section 4.1): User calibration Sensor check/Zero adjustment.An overview diagram of the calibration procedures can be found on thefollowing page.User calibrationWith a user calibration you compensate for the influence of the testsample. The user calibration requires a successful Sensor check/Zeroadjustment.We recommend to check the current user calibration againstindependent comparison measurements if you suspect a basic changeof the characteristics of the test sample. If the comparisonmeasurements show clear deviations, these can be compensated by auser calibration.Sensor check/ZeroadjustmentA Sensor check determines the condition of the UV/VIS sensor. A Zeroadjustment compensates for irreversible changes (e.g. changes of themeasurement windows that cannot be eliminated by thoroughcleaning).A Sensor check should be carried out twice per year at regularintervals. An extraordinary Sensor check should be carried out if yoususpect the sensor to be damaged, e.g. after a mechanical shock.If the Zero adjustment is not successful, the sensor is blocked formeasurement. A successful Zero adjustment is required for thedetermination of measured values.Recalibration in case ofchange of measuringlocationNoteBasically, we recommend a Sensor check/Zeroadjustment with subsequent user calibration afterany change of the application or measuring location(changing the Measuring location setting).4 - 4


NitraVis 700/x IQ TS SetMeasuring / operationNoteNormally, if the sensor is exchanged, no new user calibration isrequired. The data of the user calibration is stored in theIQ SENSOR NET controller and thus assigned to the measuring location(not to the sensor). The calibration data of the Sensor check/Zeroadjustment is stored in the sensor.Procedure of sensorcalibrationFig. 4-4Overview of Sensor check/Zero adjustment and user calibration.4 - 5


Measuring / operationNitraVis 700/x IQ TS Set4.4.2 User calibrationThe user calibration is performed separately for the main andsecondary sensor.Calibration points andvalue pairsThe adjustment is carried out at one or two points within the measuringrange. A value pair is determined at each point. Each value pairconsists of the raw value of the UV/VIS sensor and the correspondingreference value.Each value pair has to be determined at the same time and place asthe test sample if possible. At the time of the calibration, the test sampleshould be in a condition that is typical of the application.Selection of calibrationpointsIf the required accuracy is low, the default setting of the first value paircan be adopted unchanged. The first value pair is equivalent to the zeropoint in this case. The second value pair should be close to the workingpoint of the application. This method results in a single-pointcalibration.If the application has to cover a wide value range with high measuringaccuracy, both value pairs should be used for calibration. When doingso, the calibration value pairs should be determined and input at thelimits of the application range if possible.You obtain samples of different concentrations e.g. by taking twosamples during clearly different conditions of the plant (dry period andrain period).NoteA measurement results will be ever more accurate the closer thecomposition of the test sample corresponds to the status at the time ofthe calibration. If there is a fundamental change of the characteristicsof the sample, a new calibration may be necessary.4 - 6


NitraVis 700/x IQ TS SetMeasuring / operationPerforming a usercalibrationNoteHow to navigate to the Settings of sensors and diff. sensors menu andthe operation of the menu is described in section 3.4.3.Proceed as follows if you want to perform a user calibration:1 Bring the sensor into the measuring position.2 In the Settings of sensors and diff. sensors menu, set theMeas. interval for the main sensor to the lowest value and theSignal smoothing setting to Off. Subsequently, leave the menuwith Save and quit.3 Switch to the measured value display with m.4 Wait for a measurement, read the raw value (withoutdimension) and note it down. In the case of fluctuating values,observe several measuring cycles and average the individualraw values.5 Take a sample at the same time as the measurement and inthe vicinity of the UV/VIS as possible.6 Determine the reference value and note it down as a value pairtogether with the raw value.7 For a two-point calibration:Determine the second value pair (step 4 to step 6).NoteAt least one value pair and a maximum of two value pairs can beentered for a valid calibration. The values have to be in ascendingorder. Not keeping this order will result in a calibration error.8 Sort the values pairs in ascending order.9 Enter the value pair(s) for the required sensor in the Settingsof sensors and diff. sensors menu (see following table).NoteThe entry of calibration values outside the measuring range leads to acalibration error.4 - 7


Measuring / operationNitraVis 700/x IQ TS SetNoteDefault values are marked in bold.Menu item Settings ExplanationsCal - # raw value 1 0.00 ... 5000.00 Raw value of the first value pair(lower concentration).For single-point calibration, enter 0.Cal - ref. value 1 0.00 ... 5000.00 Reference value of the first value pair(lower concentration).For single-point calibration, enter 0.Cal - # raw value 2 0.00 ... 10.00 ... 5000.00 Raw value of the second value pair(higher concentration) or raw value of thesingle-point calibration.Cal - ref. value 2 0.00 ... 10.00 ... 5000.00 Reference value of the second value pair(higher concentration) or reference valueof the single-point calibration.Calibration evaluationThe entered calibration data is checked for plausibility by the system.The check can have the following results:DisplayMeasured valuedisplayMeaning/actionsNew valid calibration value pairs weresuccessfully entered for the sensor."----" Calibration value pairs not accepted.Sensor is blocked for measurement. A logbook message is generated.Causes: Ascending order not observed. At least one value is outside themeasuring range.NoteInformation on the contents and structure of the log book and how youcan call it up is given in the LOG BOOK chapter of the IQ SENSOR NETsystem operating manual.NoteThe user calibration is not recorded in the calibration history. You can,however, view the current value pairs in the Settings of sensors anddiff. sensors menu at any time.4 - 8


NitraVis 700/x IQ TS SetMeasuring / operation4.4.3 Sensor check/NullabgleichSensor check and Nullabgleich are carried out using ultrapure waterand with the aid of the sensor sleeve.CautionSensor check and Nullabgleich have to be carried out underabsolutely clean conditions. If you do not work carefully enoughthe Nullabgleich can deteriorate the measuring quality.Quality of the ultrapurewaterPreparing the Sensorcheck/NullabgleichExclusively use distilled or demineralized water that is suitable foranalysis purposes. Especially make sure that the concentration ofmetrologically relevant substances (nitrate) is negligible.Prepare the Sensor check/Nullabgleich as follows:1 Switch to the measured value display with m.2 Select the main sensor with d.3 Call up the calibration mode with c. The Maintenancecondition:Linked outputs are frozen. window appears.Fig. 4-5Maintenance conditionNoteWhen the maintenance condition is activated, linked outputs remain intheir current condition. The compressed-air cleaning and thedetermination of measured values are switched off. The measuredvalue display shows a flashing, invalid measured value ("----").4 Confirm the maintenance condition with g.5 Confirm the following message, "No user calibration ..." withg.6 Take the sensor out of the test sample.4 - 9


Measuring / operationNitraVis 700/x IQ TS Set7 Unscrew the compressed-air connector from the sensor.Caution: Be careful not to lose the two white sealing rings andthe screw.8 Thoroughly clean the sensor enclosure, compressed-airchannels and measurement windows (see section5.2.1 EXTERIOR CLEANING). To finish the cleaning procedure,thoroughly rinse the entire sensor with deionized water.9 Push the clean sensor sleeve over the sensor so that theopening of the sensor sleeve is in the area of the measuringgap.MeasuringchamberSensorsleeveFig. 4-6Plugging the sensor sleeve on the sensor10 Place the sensor horizontally. Turn the sensor so that themeasuring gap opening points sidewards. Turn the fillingopening of the sensor sleeve upward (Fig. 4-6).11 Rinse the measuring chamber with ultrapure water at least 3times.12 Fill the measuring chamber with ultrapure water.13 If there are air bubbles on the measurement windows removethem by knocking on the sensor sleeve with a bar.4 - 10


NitraVis 700/x IQ TS SetMeasuring / operationCarrying out the Sensorcheck/Nullabgleich14 Select the required option with d and g: Sensor check Nullabgleich15 Confirm with g.A multipart checklist appears. Use it to check once morewhether all preparations have been completed.16 Confirm each checklist with g until the Start measurementdisplay appears.NoteUp to this point, you can break off the calibration procedure at any timewith the e key. The system continues to work with the old calibrationdata. However, you have to switch off the maintenance condition in anycase.After starting the calibration with the g key (step 17) you can nolonger cancel the calibration.17 Confirm with g.The measurement is started. After the end of the measurementthe result appears. The result is entered in the calibrationhistory at the same time.Result after SensorcheckDisplay outputEntry incalibrationhistoryMeaningEvaluation number0Evaluation number-1 or +1Evaluation number-2 or +20 Sensor check successful.-1 or +1 Sensor check not successful(small deviation).-2 or +2 Sensor check not successful(big deviation).4 - 11


Measuring / operationNitraVis 700/x IQ TS SetResult after ZeroadjustmentDisplay outputEntry incalibrationhistoryMeaningSensorreleased formeasurementZero adjustmentsuccessful.OKZero adjustmentsuccessful.YesZero adjustmenterroneous!ErrorZero adjustmentnot successful.No ("----")NoteIf the result is erroneous please proceed according to the diagram onpage 4-5. For a new Sensor check/Zero adjustment clean the sensorand all devices once again and take care that the conditions areabsolutely clean.Completing thecalibrationAfter the successful Sensor check/Zero adjustment, return to themeasurement as follows:18 Confirm the calibration result with g.19 Confirm the message, "After successful calib ..." with g.The display returns to the measured value display. Themeasured value flashes because the sensor is still in themaintenance condition.20 If the calibration was successful, pour away the ultrapurewater, remove the sensor sleeve and install the sensorincluding the compressed-air hose at the measuring location.21 Switch off the maintenance condition (select the main sensorwith d, press g and make the setting in the Display/Optionsmenu).22 Switch to the measured value display with m. The measuredvalue stops flashing.NoteStore the sensor sleeve in a clean environment, e.g. in a plastic bag,until the next calibration.4 - 12


NitraVis 700/x IQ TS SetMeasuring / operation4.4.4 Sensor check with standard solutionsTo check the sensor with standard solutions, you have to set the NO3-N standard measuring mode for the main sensor. This also applies forchecking the zero point with ultrapure water.NoteThe algorithms of all measuring modes except the NO3-N standardmode are adapted to real test samples. With these algorithms it doesnot make sense to measure standard solutions or ultrapure water.ProcedureThe sensor check is carried out using the sensor sleeve. Basically, thesame cleanliness requirements apply as for the Sensor check/Zeroadjustment. The following course describes the mains steps. Fordetails on individual steps please refer to section 4.4.3.NoteWhen switching to the NO3-N standard measuring mode, all links andsettings of the outputs are erased.1 Switch on the maintenance condition (select the main sensorwith d, press g and make the setting in the Display/Optionsmenu).2 Take the sensor out of the test sample.3 Thoroughly clean the entire sensor, especially the measuringgap.4 Push the sensor sleeve on the sensor and rinse it several timeswith ultrapure water, then once with standard solution.5 Place the sensor in a horizontal position and fill the sensorsleeve with standard solution. Remove air bubbles byknocking.6 In the Settings of sensors and diff. sensors menu, select theNO3-N standard measuring mode for the main sensor.Subsequently, leave the menu with Save and quit.7 Switch to the measured value display with m and read themeasured value.8 After the measurement is completed, empty the sensor sleeve,pull it off the sensor and install the sensor including thecompressed-air hose at the measuring location.9 Reset the Measuring mode and Cleaning mode to the originalsetting.10 Switch off the maintenance condition.4 - 13


Measuring / operationNitraVis 700/x IQ TS Set4 - 14


NitraVis 700/x IQ TS SetMaintenance and cleaning5 Maintenance and cleaning5.1 MaintenanceThe UV/VIS NitraVis 700/x IQ TS sensor operates maintenance-free.5.2 Cleaning5.2.1 Exterior cleaningWarningRisk of injury by active compressed-air cleaning. Before removingthe sensor from the test sample, switch off the compressed-aircleaning function (e.g. activate the maintenance condition).WarningContact with the sample can be dangerous for the user!Depending on the type of sample, suitable protective measuresmust be taken (protective clothing, protective goggles, etc.).CautionNever use abrasives or metal brushes to clean the sensor.To clean the sensor, use the following cleaning agents only:Contamination Cleaning agents Reaction time atroom temperatureWater-solublesubstancesGreases and oilsLime and hydroxidecoatingsTapwater– Warm water andhouseholdwashing-up liquid– If the sensor ishighlycontaminated:methylated spiritsAcetic acid (10 %)Any– Any– Maximum 5minutesFor a short time,subsequently rinsewith tapwaterCleaning thecompressed-airchannelsThe compressed-air channels can be cleaned using a pipe-cleaner.5 - 1


Maintenance and cleaningNitraVis 700/x IQ TS SetCleaning themeasurement windowsFinishing the cleaningprocedure before aSensor check or ZeroadjustmentIt is not necessary to clean the measurement windows manually if thecleaning efficiency of the compressed-air cleaning function is sufficient.If contamination can be noticed or if you suspect contaminationbecause of drifting measured values, please observe the followingpoints: Before cleaning the measurement windows the rest of the sensorenclosure should already be clean. Avoid the presence of abrasiveparticles in the measuring gap. For the measurement window, use lint free cleaning tissues soakedwith cleaning agent. Direct the cleaning tissue along themeasurement windows with the aid of an object of suitablethickness. If necessary, repeat the cleaning procedure several times andchange the cleaning tissue in between.Residues of cleaning agents can lead to an erroneous sensorcalibration (Sensor check or Zero adjustment). To complete thecleaning process, thoroughly rinse the sensor several times withdeionized water, if you want to calibrate the sensor subsequently.5.2.2 Compressed-air driven cleaning of the measurementwindowsThe cleaning system cleans the measurement windows automaticallyat regular intervals.5.3 Exchange of componentsIf the MIQ/CHV has to be exchanged, please note the instructions onthe installation of this component (see component operating manual ofthe MIQ/CHV).NoteThe latest version of the MIQ/CHV component operating manual canbe found on the Internet under www.WTW.com.5.4 DisposalWe recommend to dispose of the sensor and modules as electronicwaste.5 - 2


NitraVis 700/x IQ TS SetReplacement parts, maintenance equipment, accessories6 Replacement parts, maintenanceequipment, accessoriesInstallation accessoriesDescription Model Orderno.Triangular suspension VISSet-EH/F 480 056Electrode floater S 200 108 540Adapter for electrode floater (requiredfor installation in the S 200 electrodefloater)VISSet-S 200 480 054NoteInformation on other IQ SENSOR NET accessories is given in the WTWcatalog and on the Internet.6 - 1


Replacement parts, maintenance equipment, accessoriesNitraVis 700/x IQ TS Set6 - 2


NitraVis 700/x IQ TS SetWhat to do if...7 What to do if...7.1 Troubleshooting"----" display(invalid measured value)Cause– User calibration valuesentered incorrectly– Sensor check/Zeroadjustment erroneous– Zero adjustment stillerroneous after several trialsRemedy– Correct entry and enter again(section 4.4.2)– Repeat the Sensor check/Zeroadjustment.Check conditions, especiallycleanliness (section 4.4.3)– Contact WTW– Unknown – See log bookNo TSS measurement inthe measured valuedisplayCause– TSS sensor (secondarysensor) is not activeRemedy– Set the TSS sensor to active inthe setting menu of the mainsensor (section 3.4.4)Implausible measuredvaluesCauseRemedy– Erroneous user calibration – Repeat user calibration. Makesure the samples forcomparison are representative.– Substantial change of the testsample (sample matrix)– Carry out new user calibration– Measurement windows dirty – Clean measurement windows– Sensor setting wrong – Check and, if necessary,correct the Measuring mode,Measuring location sensorsettings– Carry out new user calibration– Optical system maladjusted,e. g. by inadmissiblemechanical shock– Perform a Sensor check/Zeroadjustment7 - 1


What to do if...NitraVis 700/x IQ TS SetDrifting measuredvaluesCause– Cleaning efficiency too low -measurement windowsbecoming more and morecontaminated– Failure of the cleaningsystem– Substantial change of the testsample (sample matrix)Remedy– Clean measurement windows(section 5.2.1)– Set longer cleaning duration– Set more frequent cleaningprocedures– Increase pressure– Clean measurement windows(section 5.2.1)– Check all components of thecleaning system (compressor,compressed-air line, UV/VISsensor, rinsing openings)– Carry out new user calibrationDisplay of OFLCauseRemedy– Measuring range exceeded – Check process– Foreign matter in themeasuring gap– Clean measuring gap (section5.2.1)– Erroneous user calibration – Repeat user calibration. Makesure the samples forcomparison are representative.Measured valuefluctuating heavilyCause– Gas bubbles in front of themeasurement windowsRemedy– Check the position within theprocess and the installationposition– Increase the adjustment phaseafter the cleaning processMeasured values too lowor too highCause– Gas bubbles in front of themeasurement windowsRemedy– Check the installation positionof the sensor– Measurement window dirty – Clean measurement window7 - 2


NitraVis 700/x IQ TS SetWhat to do if...Display of ERROR Cause Remedy– No connection between UV/VIS sensor and MIQ/VIS– UV/VIS sensor not correctlyconnected– Load at a power supplymodule too high– IQ SENSOR NET cabletowards the MIQ/VIS too long(voltage drop too great)– Electrical connectionbetween power supplymodule and MIQ/VIS isinterrupted– Check all electrical connections– Check log book entries and allLEDs on the relevant modules– If the sensor cable is defectivereturn the sensor– Check assignment of terminalconnections– Install another power supplymodule in the vicinity of thesensor– Install another power supplymodule in the vicinity of thesensor– Check the cable connectionstep-by-step starting with thepower supply module, andreplace any defective cablesections.– Check the contacts on the MIQmodules (stack mounting).Clean any dirty contacts.Carefully bend back contactsprings that have been pressedflat or bent (pay attention tosufficient spring tension)7 - 3


What to do if...NitraVis 700/x IQ TS SetNo compressed air Cause Remedy– Compressed air supplyinterrupted or too weak– Supply voltage on the MIQ/CHV not available or too low– Check the compressed airsupply– See the chapter, WHAT TO DOIF... in the system manual– Error in triggering – Perform the function checkaccording to section 7.2– If the LED does not light up,check the triggering (detachedterminal connection, brokencontrol line, defective relayoutput)– Check whether the valveswitches on light change ofLED (if required, pull thecompressed-air hose off theMIQ/CHV and check whetherthe valve is supplied withcompressed air). If the valvedoes not switch, contact WTW.– Valve is frozen, e. g. due tousing moist compressed air– Defrost the valve and rinse withdry air– Mount a maintenance unitbefore the valve7 - 4


NitraVis 700/x IQ TS SetWhat to do if...7.2 Function check of the cleaning functionA yellow LED on the circuit board serves to check the condition of thevalve (Fig. 7-1). It lights up when the valve is open.LEDFig. 7-1Pilot LED on the boardTo check that the valve triggers correctly, proceed as follows:WarningDanger of injury from lines that are under pressure. Thecompressed air glands in the housing may only be opened by aservice technician authorized by WTW.CautionDanger of burning on a hot resistor. The resistor can heat up to80 °C during operation. Do not touch the resistor.1 Commission the IQ SENSOR NET system.2 Open the MIQ/CHV.3 Under Settings of sensors and diff. sensors, set the Meas.interval and Meas. betw.cleaning so that the relay will soonswitch (e.g. Meas. interval: minimal, Meas. betw.cleaning: 1).4 Check on the MIQ/CHV whether the yellow LED on the circuitboard lights up when the relay is closed.7 - 5


What to do if...NitraVis 700/x IQ TS Set7 - 6


NitraVis 700/x IQ TS SetTechnical data8 Technical data8.1 Sensor8.1.1 General dataDimensions(in mm)Ø 40 Ø 44602Measuring gapNitraVis 700/1 IQ TSNitraVis 700/5 IQ TS1 mm5 mmCompressed-air hose6 x 1 mmWeightapprox. 1100 g (without sensor connection cable)Connection techniqueConnection via 7-pole cable that is permanently fixed on the sensorConnection cableLengthDiameterSmallest allowedbend radiusConnection15 m7 mmPermanent bend: 150 mmSingle bend: 70 mmOpen wire ends with wire endsleeves, converted to be connectedto the 5-pole terminal strip in theMIQ/VIS.8 - 1


Technical dataNitraVis 700/x IQ TS SetMaterialsSensor enclosureMeasurement windowProtective ringCable sheathCompressed-air hoseAluminium alloy AlMgSi1,anodizedSapphirePOMPURPURStorage temperature - 10 ... 50 °C8.1.2 Electrical dataElectrical dataPower consumptionProtective class6.5 WIIIInstrument safetyApplicable norms – EN 61010-1EMC– EN 61326, Emission Class B– FCC Class A8.1.3 Measurement conditionsSuitability and areas ofapplication Municipal wastewater with a low proportion of industrial wastewaterThe sensor is not suitable for seawater and industrial wastewater.Measuring mediumpH value 4 - 9Salt contentFlow rate through themeasuring gap< 5000 mg/l chloride< 3 m/sTemperature 0 °C ... + 45 °COperating positionAny8 - 2


NitraVis 700/x IQ TS SetTechnical dataDepth of immersionminmaxThe measuring gap must be filledwith test sample.10 m depthPressure resistanceSensor including connection cable:Max. allowed overpressureType of protection10 5 Pa (1 bar)IP 68 (10 5 Pa or 1 bar)The sensor meets the requirements according to article 3(3) of thedirective 97/23/EC ("pressure equipment directive").8.1.4 Measuring ranges and resolutionNitrate measurement1 mm gap widthMeasuring mode /measuring locationMeasuring rangeResolutionNO3 Inlet 0.0 ... 300.0 mg/l 0.1 mg/lNO3 Activation 0.0 ... 300.0 mg/l 0.1 mg/lNO3-N Inlet 0.00 ... 60.00 mg/l 0.01 mg/lNO3-N Activation 0.00 ... 60.00 mg/l 0.01 mg/lNO3-N standard 0.0 ... 100.0 mg/l 0.1 mg/lNitrate measurement5 mm gap widthMeasuring mode /measuring locationMeasuring rangeResolutionNO3 Outlet 0.0 ... 150.0 mg/l 0.1 mg/lNO3-N Outlet 0.00 ... 30.00 mg/l 0.01 mg/lNO3-N standard 0.00 ... 25.00 mg/l 0.01 mg/lTSS measurement1 mm gap widthMeasuring mode /measuring locationMeasuring rangeResolutionTSS Inlet 0.00 ... 10.00 g/l 0.01 g/lTSS Activation 0.00 ... 20.00 g/l 0.01 g/l8 - 3


Technical dataNitraVis 700/x IQ TS SetTSS measurement5 mm gap widthMeasuring mode /measuring locationMeasuring rangeResolutionTSS Outlet 0.0 ... 900.0 mg/l 0.1 mg/lNoteThe quoted measuring ranges are nominal measuring ranges that aretheoretically possible. In practice, real measuring ranges exist that aregiven by the limits of photometric determination. The limits aresignificantly influenced by the light scattering due to solids and theabsorption of accompanying substances (sample matrix). Therefore,no fixed measuring range can be determined beforehand.8.2 MIQ/VISNoteGeneral technical data of MIQ modules can be found in the chapter,TECHNICAL DATA of the IQ SENSOR NET system operating manual.WeightApprox. 0.5 kgElectrical dataNominal voltagePower consumptionProtective classMax. 24 VDC via the IQ SENSOR NET (formore details, see TECHNICAL DATA chapter ofthe IQ SENSOR NET system operatingmanual)0.5 WIIIInstrument safetyApplicable norms – EN 61010-1– UL 3111-1– CAN/CSA C22.2 No. 1010.1EMC – EN 61326, Emission Class B– FCC Class A8 - 4


NitraVis 700/x IQ TS SetTechnical dataTerminal connectionsIQ SENSOR NETconnectionsNumber of relaycontactsNumber of inputs forUV/VIS sensors2Additional connectable SENSORNETterminator (terminating resistor)1, is exclusively used for the time-controlled,compressed-air driven sensor cleaningfunction1Terminal typeScrew-type terminal strip, accessible byraising the lidTerminal ranges Solid wires: 0.2 ... 4.0 mm 2AWG 24 ... 12Flexible wires: 0.2 ... 2.5 mm 2Line diameter of cableswith line voltageEurope: 1.5 ... 4.0 mm 2USA: AWG 14 ... 12Cable feeds4 cable glands M16 x 1.5 on the undersideof the module8.3 MIQ/CHVNoteGeneral technical data of MIQ modules can be found in the chapter,TECHNICAL DATA of the IQ SENSOR NET system operating manual.WeightApprox. 0.5 kgInstrument safetyApplicable norms – EN 61010-1– UL 3111-1– CAN/CSA C22.2 No. 1010.1EMC– EN 61326, Emission Class B– FCC Class A8 - 5


Technical dataNitraVis 700/x IQ TS SetElectrical dataNominal voltagePower consumptionProtective classMax. 24 VDC via the IQ SENSOR NET (formore details, see TECHNICAL DATA chapter ofthe IQ SENSOR NET system operatingmanual)2 WIIITerminal connectionsIQ SENSOR NETconnections2Additional connectable SENSORNETterminator (terminating resistor)Note:Due to the limited number of cable glands,only one SENSORNET connection can beused. SENSORNET connection 1 or 2 canbe selected.Valve switching contact 1Terminal typeScrew-type terminal strip, accessible byraising the lidTerminal ranges Solid wires: 0.2 ... 4.0 mm 2AWG 24 ... 12Flexible wires: 0.2 ... 2.5 mm 2Cable feeds4 cable glands (M16 x 1.5) on the undersideof the moduleValve circuitSwitching voltageMax. switching currentApprox. 12 VApprox. 70 mACompressed airGas Compressed air, CO 2Required qualityOperating pressureConnectionsDry, dust-free and oil-freeMax. 7x10 5 Pa (7 bar) absolute6 mm hose liners8 - 6


NitraVis 700/x IQ TS SetIndexes9 Indexes9.1 Explanation of the messagesThis chapter contains a list of all the message codes and relatedmessage texts that can occur in the log book of the IQ SENSOR NETsystem for the NitraVis 700/x IQ TS Set.NoteInformation on the contents and structure of the log book and the structure of the message codeis given in the LOG BOOK chapter of the IQ SENSOR NET systemoperating manual.Component codes of theNitraVis 700/x IQ TS SetcomponentsThe last three digits of the message code form the component code. Itidentifies the component (active component) that caused the message:Component code Component371 NitraVis 700/1 IQ372 NitraVis 700/5 IQ374 SolidVis 700/1 IQ, or SolidVis 700/5 IQ511 MIQ/VISNoteSome error messages contain an internal error code, starting with "#".9.1.1 Error messagesMessage codeMessage textEAE37y Measurement out of order #-4* Check process (TSS or measured value too high)* Select measuring location free of air bubbles* Clean sensor* Remove foreign matter from measuring gap* Optimize cleaning settings* Carry out sensor test and zero adjustment with ultrapure water9 - 1


IndexesNitraVis 700/x IQ TS SetMessage codeMessage textEAF37y Optical measuring range exceeded #-10* Check process (TSS or measured value too high)* Select measuring location free of air bubbles* Remove foreign matter from measuring gap* Clean sensor* Optimize cleaning settings* Switch on signal smoothing, increase response timeEAI37yEAJ37yEAK37yEAM37yEC337yEIA37yEIB37yEIC37yEID37yESF37yESG511ESH511Zero adjustment erroneous* Clean sensor and sensor sleeve repeatedly* Position sensor sleeve according to operating manual* Rinse measuring chamber with ultrapure water several times* Fill measuring chamber with ultrapure water* Repeat zero adjustmentSensor temperature too high, no operation possible #xxx* Check process and applicationSensor temperature too low, no operation possible #xxx* Check process and applicationMeas. range exceeded or undercut* Check processUser calibration erroneous,Check raw value / reference value pairs* Set all values within the measuring range(see operating manual)* Enter value pairs in ascending orderMalfunction, no operation possible* Connect sensor cable to MIQ/VIS correctly and securely* Provide voltage supply to MQ/VIS and sensor* Sensor or MIQ/VIS defective* Contact WTWSensor voltage too low #xxx* More message texts according to E1xxxSensor voltage too low, no operation possible #xxx* More message texts according to E2xxxSensor voltage too high, no operation possible #xxx* MIQ/VIS defectiveSensor defective, no operation possible #xxx* Contact WTWSensor incompatible, no operation possibleSensor incompatible, no operation possible #xxx9 - 2


NitraVis 700/x IQ TS SetIndexes9.1.2 Info messagesMessage codeIAB37yIAC37yIAD37yMessage text(here, all relevant software versions of the NitraVis 700/x IQ TS arerecalled)Zero adjustment was successfully carried out* Carry out sensor check* If required, carry out new user calibrationMeasuring location was changed, sensor check required* Prepare and carry out sensor check according to operating manual* Repeat sensor check if required* In the case of several errors carry out zero adjustment* After zero adjustment carry out another sensor checkIAG37y Optical measuring range undercut #-11* Check process* Immerse sensor in test sample* Switch on signal smoothing, increase response timeIAH37yIAL37yIS337ySensor check erroneous* Clean sensor and sensor sleeve thoroughly and repeatedly* Position sensor sleeve according to operating manual* Rinse measuring chamber with ultrapure water several times* Fill measuring chamber with ultrapure water* Repeat sensor checkRecalculated minimum interval time of ... minutesUnknown Error #xxx9 - 3


IndexesNitraVis 700/x IQ TS Set9.2 Status infoThe status info is a coded piece of information on the current status ofa sensor. Each sensor sends this status info to the controller. Thestatus info of sensors consists of 32 bits, each of which can have thevalue 0 or 1.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Status info,general structure1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (general)0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (internal)16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31The bits 0 - 15 are reserved for general information.The bits 16 - 21 are reserved for internal service information.You obtain the status info: by a manual query in the Settings/Service/List of all componentsmenu (see system operating manual) by an automated query– of a superordinate process control (e. g. when connected to theProfibus)– of the IQ Data Server (see IQ SENSOR NET Software Packoperating manual)NoteThe evaluation of the status info, e. g. with an automated query, mustbe made individually for each bit.Status-InfoNitraVis 700/x IQ TSStatus bitBit 0ExplanationComponent hardware defectiveBit 1-31 -9 - 4


NitraVis 700/x IQ TS SetAppendix10 Appendix10.1 GlossaryAbsorbance(Absorption)AdjustingCalibrationCalibration valuepairConcentrationMeasured parameterMeasured valueMeasured valueMeasuring gapMeasuring systemNO3-NRaw valueAttenuation of the light beam when it goes throught the sample.To manipulate a measuring system so that the relevant value (e. g. thedisplayed value) differs as little as possible from the correct value ora value that is regarded as correct, or that the difference remainswithin the tolerance.Comparing the value from a measuring system (e. g. the displayedvalue) to the correct value or a value that is regarded as correct.Often, this expression is also used when the measuring system isadjusted at the same time (see adjusting).Value pair consisting of the raw value measured by the UV/VISsensor, and a reference value measured, e.g. by a laboratorydetermination. The calibration value pairs are the result of the usercalibration.Mass or amount of a dissolved substance per volume, e. g. in g/l ormol/l.The measured parameter is the physical dimension determined bymeasuring, e. g. pH, conductivity or DO concentration.The measured value is the special value of a measured parameter tobe determined. It is given as a combination of the numerical value andunit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).The measured value is determined from the raw value taking intoaccount the data from a user calibration.The measured value is displayed together with the raw value in themeasured value display.The measuring gap is between the two measurement windows. In themeasuring gap, the light beam penetrates the test sample.The measuring system comprises all the devices used for measuring,e. g. the meter and sensor. In addition, there is the cable and possiblyan amplifier, terminal strip and armature.The proportion of nitrogen coming from nitrate.The raw value is determined from the spectrum while taking intoaccount the data from the zero adjustment. The raw value is displayedon the right side of the measured value in the measured value display.10 - 1


AppendixNitraVis 700/x IQ TS SetReference sampleResolutionSample matrixSpectrumTest sampleTurbidityZero adjustmentRandom sample of the test sample for comparative chemicalanalyticallaboratory analyses intended for user calibration.Smallest difference between two measured values that can bedisplayed by a meter.Composition of the test sample of different individual substances.Distribution of the absorbance depending on the wavelength.With the aid of the zero adjustment and user calibration, the measuredvalues are calculated from the spectrum.Designation of the measuring solution ready to be measured.Light attenuation caused by diffuse scattering at undissolvedsubstancesMeasuring and saving the absorbance spectrum of ultrapure water.Defines the zero point in the spectrum for all wavelengths. The lightbeam is not alleviated at the zero point. The zero point influences thecalculation of the raw value.10 - 2

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