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wtw NitraVis 701 IQ NI Operating Manual
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wtw NitraVis 701 IQ NI Operating Manual

Optical sensor for nitrite and nitrat
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OPERATING MANUAL
ba77079e02 05/2017
NitraVis 701 IQ NI
NitraVis 705 IQ NI
OPTICAL SENSOR FOR NITRITE AND NITRAT

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Summary of Contents for wtw NitraVis 701 IQ NI

  • Page 1 OPERATING MANUAL ba77079e02 05/2017 NitraVis 701 IQ NI NitraVis 705 IQ NI OPTICAL SENSOR FOR NITRITE AND NITRAT...
  • Page 2 NitraVis 70x IQ NI © Copyright 2017 Xylem Analytics Germany GmbH Printed in Germany. ba77079e02 05/2017...
  • Page 3 NitraVis 70x IQ NI Contents Contents Overview ......... . 5 How to use this component operating manual .
  • Page 4 CarboVis 70x IQ TS Maintenance and cleaning ......34 Maintenance ........34 Sensor cleaning .
  • Page 5 Overview NitraVis 70x IQ NI Overview How to use this component operating manual Structure of the IQ S IQ Sensor Net Operating Manual ENSOR operating manual System Operating Manual (Ring Binder) IQ Sensor MIQ Module MIQ Terminal Operating Operating Operating Manual Manual Manual...
  • Page 6 The NitraVis 70x IQ NI is an online sensor for the on-site determination of nitrite and nitrate in waste water treatment plants. The range of application comprises control, feedback control and monitoring. Measuring location NitraVis 701 IQ NI Aeration tank, inlet or outlet NitraVis 705 IQ NI Outlet...
  • Page 7 Overview NitraVis 70x IQ NI Structure of the sensor NitraVis 70x IQ NI The sensor has a light source (1), a measuring gap (3) to enable the contact of light with the measuring solution, and a detector (5) to measure the attenuated light beam.
  • Page 8 Safety NitraVis 70x IQ NI Safety Safety information 2.1.1 Safety information in the operating manual This operating manual provides important information on the safe operation of the product. Read this operating manual thoroughly and make yourself familiar with the product before putting it into operation or working with it. The operating manual must be kept in the vicinity of the sensor so you can always find the infor- mation you need.
  • Page 9 Safety NitraVis 70x IQ NI Safe operation 2.2.1 Authorized use The authorized use of the NitraVis 70x IQ NI consists of its use as a sensor in the IQ S . Only the operation and running of the sensor according to ENSOR the instructions and technical specifications given in this operating manual is authorized (see chapter 8 T...
  • Page 10 Commissioning NitraVis 70x IQ NI Commissioning IQ S system requirements ENSOR Software versions of The operation of the NitraVis 70x IQ NI requires the following software versions the controller and in the IQ S ENSOR terminal components  DIQ/S 28X Controller software: Version 3.72 or higher ...
  • Page 11 Commissioning NitraVis 70x IQ NI Installation 3.3.1 Mounting the sensor NOTE The sensor is an optical precision instrument that should be protected against shocks. Make sure that the distances to the wall, bottom and other installation surroundings are sufficient. If necessary, protect the sensor from hitting with the protective ring provided.
  • Page 12 Commissioning NitraVis 70x IQ NI Vertical installation For vertical installation, mount the sensor in a position that allows interfering ele- ments in the measuring gap to escape with the current. In the case of vertical installation, the minimum flow rate is 0.2 m/s so the measuring gap is kept clean optimally.
  • Page 13 Commissioning NitraVis 70x IQ NI 3.3.2 Mounting the shock protectors The shock protectors consist of two rings, a cap and four cable ties. To mount the shock protectors, proceed as follows: Sensor with mounted shock protectors Fig. 3-4 Mounting the shock protectors Plug the cap (pos.
  • Page 14 NitraVis 70x IQ NI. Information on this and other IQ S accessories is given in the WTW catalog and on the Internet. ENSOR How to connect the SACIQ (SW) sensor connection cable to the ter-...
  • Page 15 Commissioning NitraVis 70x IQ NI Connecting the Take the protective caps off the plug connections of the sensor and the sensor to the sensor SACIQ (SW) sensor connection cable and keep them safe. connection cable Plug the socket of the SACIQ (SW) sensor connection cable onto the plug head connector of the sensor.
  • Page 16 Commissioning NitraVis 70x IQ NI Initial commissioning 3.4.1 General information CAUTION Never look into the measuring window or put objects into the measuring window during operation! The emitted UV radiation can damage the eyes! In the case of authorized use, inadvertent eye contact with the light beam is not possible.
  • Page 17 Commissioning NitraVis 70x IQ NI 3.4.2 Settings for the main sensor Measuring cycle A measuring cycle consists of the cleaning procedure, the adjustment time for the measuring system and the determination of the measured value. The follow- ing graphic demonstrates the relevant settings: Measuring cycle Time...
  • Page 18 Commissioning NitraVis 70x IQ NI Menu item Settings Explanations Measuring location NitraVis 701 IQ NI Measurement location or application of Activation the sensor.   The possible measurement loca- Inlet  tions are displayed depending on the Outlet  currently set measuring mode.
  • Page 19 Commissioning NitraVis 70x IQ NI Menu item Settings Explanations Response time t90 3 ... 60 min Response time of the signal smoothing. Depending on the sample matrix, mea- sured values can vary more or less strongly (e.g. due to foreign bodies or air bubbles).
  • Page 20 Commissioning NitraVis 70x IQ NI Menu item Settings Explanations Quit The display switches to the next higher level without storing the new settings. ba77079e02 05/2017...
  • Page 21 Measurement / Operation NitraVis 70x IQ NI Measurement / Operation Determination of measured values Physical sensor, series number xxx Absorbance spectrum Absorbance spectrum of zero adjustment of measurement Main Virtual sensor sensor software software Main sensor meas. mode Virtual sensor meas. mode (algorithm) (algorithm) Main sensor raw value...
  • Page 22 Measurement / Operation NitraVis 70x IQ NI Measurement operation CAUTION Never look into the measuring window or put objects into the measuring window during operation! The emitted UV radiation can damage the eyes! In the case of authorized use, inadvertent eye contact with the light beam is not possible.
  • Page 23 Measurement / Operation NitraVis 70x IQ NI  The user calibration is not representative (or erroneous) Calibration 4.3.1 Overview In the delivery condition, the sensor is precalibrated and ready to measure (see section 3.4.1). There are two types of calibration that are included into the calculation of the measured value at different points (see section 4.1): ...
  • Page 24 Measurement / Operation NitraVis 70x IQ NI Sensor check (H2O dest.) determines the condition of the sensor. By checking Sensor check (H2O dest.) the sensor with the aid of the you can rapidly see any changes of the sensor and whether it needs to be cleaned or if any other actions have to be taken.
  • Page 25 Measurement / Operation NitraVis 70x IQ NI 4.3.2 User calibration Calibration points The adjustment is carried out at one or two points within the measuring range. and value pairs A value pair is determined at each point. Each value pair consists of the raw value of the NitraVis 70x IQ NI sensor and the corresponding reference value.
  • Page 26 Measurement / Operation NitraVis 70x IQ NI Performing a user Proceed as follows if you want to perform a user calibration: calibration Bring the sensor into the measuring position. Switch to the measured value display with <M>. Use <> to select the NitraVis 70x IQ NI sensor. Maintenance condition: Call up calibration with <C>.
  • Page 27 Measurement / Operation NitraVis 70x IQ NI The entry of calibration values outside the measuring range leads to a calibration error. Default values are marked in bold. Menu item Settings Explanations Cal - # raw value 1 -10000,00 ... 0,00 ... 5000,00 Raw value of the first value pair (lower concentration).
  • Page 28 Measurement / Operation NitraVis 70x IQ NI Zero adjustment 4.3.3 Sensor check/ NOTE The sensor check or Zero adjustment must be carried out under absolutely clean conditions. If you do not work carefully enough the Zero adjustment can deteriorate the measuring quality. Ultrapure water As ultrapure water exclusively use distilled or deionized water that is suitable for (H2O dist.)
  • Page 29 Measurement / Operation NitraVis 70x IQ NI Flowchart Cleaning the sensor Sensor check TEST: MEASUREMENT WINDOWS (H2O dist.) Clean the measurement windows Assessment number Rinse the measuring chamber -40 ... +40 < -40 or with ultrapure water several times > +40 Carry out a sensor check (H2O) After cleaning several times without significant change of...
  • Page 30 Measurement / Operation NitraVis 70x IQ NI Zero adjustment Preparing the Prepare the sensor check or as follows: sensor check or Zero adjustment Switch to the measured value display with <M>. Use <> to select the NitraVis 70x IQ NI sensor. Maintenance condition: Call up calibration with <C>.
  • Page 31 Measurement / Operation NitraVis 70x IQ NI Measuring chamber Sensor sleeve Fig. 4-4 Putting the sensor sleeve on the sensor Put the sensor in a horizontal position on a firm and vibration-free sur- face. Turn the filling opening of the sensor sleeve upward (Fig. 4-4). Rinse the measuring chamber with ultrapure water at least 3 times.
  • Page 32 Measurement / Operation NitraVis 70x IQ NI Up to this point, you can break off the calibration procedure at any time with the <ESC> key. The system continues to work with the old calibration data. The maintenance condition, however, has to be switched off again in any case.
  • Page 33 Measurement / Operation NitraVis 70x IQ NI If no valid zero adjustment is possible under the current conditions, you can restore the readiness for measurement by measuring with an older valid zero adjustment. Zero adjustment To do so, select the setting in the sensor settings Factory User...
  • Page 34 Maintenance and cleaning NitraVis 70x IQ NI Maintenance and cleaning Maintenance The NitraVis 70x IQ NI sensor operates maintenance-free. Sensor cleaning 5.2.1 Cleaning agents and accessories Cleaning agents To clean the sensor, use the following cleaning agents only: Contamination Cleaning agents Water-soluble substances –...
  • Page 35 Maintenance and cleaning NitraVis 70x IQ NI 5.2.2 General steps to be taken Depending on the application site and the level of contamination of the sensor as well as the coming job, the cleaning procedure includes the following parts:  Every cleaning procedure starts with a basic cleaning. It removes tough grime such as incrustation of fouling matter, algae and biological deposits.
  • Page 36 Maintenance and cleaning NitraVis 70x IQ NI 5.2.3 Basic cleaning Steps of the basic Take the sensor out of the test sample and remove any solid matter cleaning deposits and incrustation of fouling matter manually with a brush or sponge. Wash the sensor down with warm tapwater (30 - 50 °C).
  • Page 37 Maintenance and cleaning NitraVis 70x IQ NI 5.2.4 Cleaning the measuring gap To remove lime or grease deposits, use the flocked cleaning cards together with the following detergents: Contamination Cleaning agents Lime deposits Hydrochloric acid 5 % for analysis Grease deposits Mixture of isopropanol and water (approx.
  • Page 38 Spare parts, maintenance equipment, accessories NitraVis 70x IQ NI Spare parts, maintenance equipment, accessories General Description Model Order no. accessories, Calibration sleeve VIS/CV 481 074 replacement parts 20 flocked cleaning cards for cleaning the VIS/CT 481 071 measuring gap Cleaning set: VIS C/SET 481 079 –...
  • Page 39 Set for the mounting of UVVIS/SAC/NOx VIS Set/F 481 080 sensors to the S 200 electrode floater Flow-through armature VIS FT-1 480 080 Information on other IQ S accessories is given in the ENSOR WTW catalog and on the Internet. ba77079e02 05/2017...
  • Page 40 What to do if... NitraVis 70x IQ NI What to do if... "----" display Cause Remedy (invalid measured – User calibration values entered – Correct the entry and enter once value) incorrectly again (section 4.3.2) Sensor check (H2O dest.) – * –...
  • Page 41 What to do if... NitraVis 70x IQ NI Drifting measured Cause Remedy values – Cleaning efficiency too low - mea- – Clean the measurement windows surement windows becoming (section 5.2.4) more and more contaminated – Use other cleaning method – Select different measurement loca- tion –...
  • Page 42 What to do if... NitraVis 70x IQ NI ERROR Display of Cause Remedy – Sensor not correctly connected – Check the assignment of the termi- nal connections – Load at a power supply module – Install another power supply module too high in the vicinity of the sensor –...
  • Page 43 Light source Lamp type Xenon flashlamp Detector Photo diodes Wavelengths range200 - 390 nm Measuring gap NitraVis 701 IQ NI 1 mm (optical layer NitraVis 705 IQ NI 5 mm thickness) Nitrite/nitrate Measuring location...
  • Page 44 Technical data NitraVis 70x IQ NI The quoted measuring ranges are nominal measuring ranges that are theoretically possible. In practice, real measuring ranges exist that are given by the limits of photometric determination. The limits are significantly influenced by the light scattering due to solids and the absorption of accompanying substances (sample matrix).
  • Page 45 Technical data NitraVis 70x IQ NI General data Dimensions hock protection: (in mm) Ø 96 Socket SACIQ... Ø 60 With shock protection: Ø 96 Weight Approx. 3.8 kg (without shock protectors and without sensor connec- tion cable) Approx. 4.8 kg (with shock protectors but without sensor connection cable) Connection Connection via SACIQ (SW) sensor connection cable...
  • Page 46 Technical data NitraVis 70x IQ NI Meter safety Applicable norms – EN 61010-1 – UL 61010-1 – CAN/CSA C22.2#61010-1 – IEC 62471 Test certificates cETLus, CE Conforms to ANSI/UL 61010-1 Certified to CAN/CSA C22.2#61010-1" 2001759 Electrical data Nominal voltage Max. 24VDC via the IQ S (for more details, ENSOR...
  • Page 47 It identifies the component (active component) that caused the mes- sage: Some error messages contain an internal error code, starting with "#". Module code Component NitraVis 701 IQ NI NitraVis 705 IQ NI NitraVis 701 IQ NI - virtual NitraVis 705 IQ NI - virtual BasicVis IQ ba77079e02 05/2017...
  • Page 48 Indexes NitraVis 70x IQ NI 9.1.1 Error messages Message code Message text Sensor temperature too high! EA2541 * Check process and application Sensor temperature too low! EA3541 * Check process and application Optical measuring range exceeded EAF541 * Check process (TSS or measured value too high) * Select measuring location free of air bubbles * Remove foreign matter from measuring gap * Clean sensor...
  • Page 49 Indexes NitraVis 70x IQ NI Message code Message text Overflow optical measurement ES4541 * Execute zero ajustment Failure optical measurement: hardware ES5541 * Contact service Failure optical measurement: software ES6541 * Contact service Failure optical measurement: software BIOS ES7541 * Contact service ba77079e02 05/2017...
  • Page 50 Indexes NitraVis 70x IQ NI 9.1.2 Informative messages Message code Message text Calculation of negative concentrations IA23Ax * Perform user calibration or check user calibration Zero adjustment was successfully carried out IAC541 * Carry out sensor check * If required, carry out new user calibration Factory calibration has been activated.
  • Page 51 Indexes NitraVis 70x IQ NI Status info The status info is a coded piece of information on the current status of a sensor. Each sensor sends this status info to the controller. The status info of sensors consists of 32 bits, each of which can have the value 0 or 1. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1 0 0 0 0 0 0 0...
  • Page 52 Appendix: Glossary NitraVis 70x IQ NI Appendix: Glossary Absorbance (Absorp- Attenuation of the light beam when it penetrates the sample. tion) Adjusting To manipulate a measuring system so that the relevant value (e.g. the displayed value) differs as little as possible from the correct value or a value that is regarded as correct, or that the difference remains within the tolerance.
  • Page 54 For more information on how Xylem can help you, go to xyleminc.com. ® Service address: Xylem Analytics Germany Sales GmbH & Co. KG Dr.-Karl-Slevogt-Str. 1 82362 Weilheim Germany Tel.: +49 881 183-325 Fax: +49 881 183-414 E-Mail wtw.rma@xyleminc.com Internet: www.WTW.com Xylem Analytics Germany GmbH Dr.-Karl-Slevogt-Str. 1 82362 Weilheim Germany...

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