wtw visoturb 700 iq Operating Manual
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wtw visoturb 700 iq Operating Manual

Iq sensor net turbidity / solid matter sensor
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Operating Manual
VisoTurb 700 IQ
IQ S
N
turbidity/solid matter sensor
ENSOR
ET
ba57301e04
06/2003

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Summary of Contents for wtw visoturb 700 iq

  • Page 1 Operating Manual VisoTurb 700 IQ IQ S turbidity/solid matter sensor ENSOR ba57301e04 06/2003...
  • Page 2 The latest version of the present operating manual can be found in the Internet under www.WTW.com. © Copyright Weilheim 2003, WTW GmbH & Co. KG Reprinting - even as excerpts - is only allowed with the explicit written authorization of WTW GmbH & Co. KG, Weilheim. Printed in Germany.

  • Page 3: Table Of Contents

    Recommended fields of application ....1-2 Features of the VisoTurb 700 IQ ....1-3 Safety .
  • Page 4 Contents VisoTurb 700 IQ Indexes ........8-1 Explanation of the messages .

  • Page 5: Overview

    VisoTurb 700 IQ Overview Overview How to use this component operating manual Structure of the IQ S ENSOR operating manual Fig. 1-1 Structure of the IQ S operating manual ENSOR The IQ S operating manual has a modular structure like the...

  • Page 6: Structure Of The Visoturb 700 Iq Turbidity Sensor

    (total suspended solids - TSS) in water/wastewater applications. The VisoTurb 700 IQ is particularly well suited for applications in polluted measuring media, e.g. in wastewater treatment plants, thanks to its robust construction and its efficient ultrasound cleaning system. It provides very high measurement accuracy with low maintenance costs.

  • Page 7: Features Of The Visoturb 700 Iq

    VisoTurb 700 IQ Overview Features of the VisoTurb 700 IQ Turbidity measurement The turbidity measurement in aqueous media with the VisoTurb 700 IQ according to is conducted nephelometrically in accordance with EN ISO 7027. EN ISO 7027 Total suspended solids...
  • Page 8 Overview VisoTurb 700 IQ 1 - 4...

  • Page 9: Safety

    Safety This component operating manual contains special instructions that must be followed during the operation of the VisoTurb 700 IQ turbidity sensor. Thus, it is essential to read this component operating manual before carrying out any work using this sensor. In addition to this...

  • Page 10: Authorized Use

    Safety VisoTurb 700 IQ Authorized use The authorized use of the VisoTurb 700 IQ comprises its use as a turbidity sensor in the IQ S ENSOR Please note the technical specifications according to chapter 7 . Only operation according to the instructions in this ECHNICAL DATA operating manual is authorized.
  • Page 11 VisoTurb 700 IQ Safety Safe operation If safe operation is no longer possible, the sensor must be taken out of operation and secured against inadvertent operation. Safe operation is no longer possible if the sensor: l has been damaged in transport...
  • Page 12 Safety VisoTurb 700 IQ 2 - 4...

  • Page 13: Commissioning

    Operating Manual Installation 3.2.1 General information The measuring principle of the VisoTurb 700 IQ (optical scattered light measurement) places particular requirements on the measurement location and on the installation of the sensor. In slightly turbid test samples (< 100 FNU), infrared light penetrates the test sample deeply.

  • Page 14: Flow Direction

    Commissioning VisoTurb 700 IQ 3.2.2 Flow direction As a general rule, the saphire disc should be positioned clearly against the current in flowing media (angle of attack approx. 20 to 45 °). Exception: If there are high quantities of foreign bodies with fibrous or...

  • Page 15: Sensor Orientation

    VisoTurb 700 IQ Commissioning 3.2.4 Sensor orientation Marking in this direction ° Infrared beam Fig. 3-2 Direction of the infrared beam relative to the arrow symbol on the shaft The sensor has a marking (arrow symbol) on the shaft. The infrared beam emerges from the front of the sensor at an angle of 45 °...

  • Page 16: Distances From The Ground And Wall

    Commissioning VisoTurb 700 IQ 3.2.5 Distances from the ground and wall Note In cases of low turbidity (< 100 FNU), the effect of the measuring environment can simulate higher turbidity or an increased level of total suspended solids. The effect of the measurement environment can be reduced by ensuring the optimum conditions (see section 3.2.1).

  • Page 17: Installation Examples

    VisoTurb 700 IQ Commissioning Installation examples As a rule, the VisoTurb 700 IQ will measure interference-free when the distances and angles etc. specified are observed. However, interferences at the measuring location (see section 3.2.1) may require special adaptations of the installation.

  • Page 18: Measuring In An Open Basin (Range > 100 Fnu)

    Commissioning VisoTurb 700 IQ 3.3.2 Measuring in an open basin (Range > 100 FNU) Example: In an open channel, the sensor can be immersed in the sample using Outlet of a waste water a wall mounting assembly, e.g. EH/W 170 wall mounting assembly, treatment plant (open (please note the minimum immersion depth).

  • Page 19: Measuring In Pipes

    VisoTurb 700 IQ Commissioning 3.3.3 Measuring in pipes Note In cases of low turbidity (< 100 FNU), the effect of the measuring environment can simulate higher turbidity or an increased level of total suspended solids. The effect of the measurement environment can be reduced by ensuring the optimum conditions (see section 3.2.1).
  • Page 20 Commissioning VisoTurb 700 IQ Example: 90 ° pipe installation Fig. 3-6 Turbidity sensor in the pipe (90 °) The following points must be observed for a right-angled installation in the pipe (Fig. 3-6): l Rotate the sensor so that the marking on the shaft (arrow symbol)
  • Page 21 VisoTurb 700 IQ Commissioning Marking aid Marking Fig. 3-7 Marking aid Install the sensor in the flow-thru adapter with the aid of the ADA-DF 9 adapter (see operating manual of the adapter). To correctly position the coupling ring on the EBST 700-DU/N, loosen it somewhat and line up the marking aid as shown in Fig.

  • Page 22: Commissioning / Readiness For Measuring

    Note Do not suspend the sensor on the sensor connection cable. Use a sensor holder or an armature. Information on this and other IQ S accessories is given in the WTW catalog and in the ENSOR Internet. Connecting the sensor...

  • Page 23: Carrying Out The Settings For The Sensor On The

    VisoTurb 700 IQ Commissioning Carrying out the settings for the sensor on the terminal of the IQ S system ENSOR Switch to the measured value display with Open the Settings/Einstellungen menu with Select and confirm the Settings of sensors and diff. sensors...

  • Page 24: Overview Of The Settings

    Commissioning VisoTurb 700 IQ Fig. 3-10 VisoTurb 700 IQ settings menu Make the sensor settings with and confirm each of them with Select the Save and quit menu item with and confirm with . The new settings are stored in the sensor.
  • Page 25 VisoTurb 700 IQ Commissioning Menu item Settings Explanations l AutoRange Measuring range Measuring ranges for the NTU measuring (continued) mode l 0 ... 0.400 NTU l 0 ... 4.00 NTU (AutoRange = automatic changeover of the l 0 ... 40.0 NTU measuring range) l 0 ...
  • Page 26 Commissioning VisoTurb 700 IQ Menu item Settings Explanations Solids range Adjustment values from the reference measurement for determining the amount of Solid matter value total suspended solids. Only displayed if the g/l TSS measuring mode was selected (for Turbidity range details, see section 4.2.2).

  • Page 27: Measuring

    VisoTurb 700 IQ Measuring Measuring The turbidity measurement in aqueous media with the VisoTurb 700 IQ is conducted nephelometrically in accordance with EN ISO 7027. The turbidity/total suspended solids sensor can also be used to determine the total suspended solids content in the sample. The appropriate correlation for the given application can be determined via a reference measurement.

  • Page 28: Calibration

    (e.g. gravimetric according to DIN 38414). If the reference measurements do not deviate from the optically determined measured value of the VisoTurb 700 IQ, the sensor is already optimally adapted to the measuring situation. If the reference measurements do deviate from the optically...

  • Page 29: Application Offset

    VisoTurb 700 IQ Measuring 4.2.1 Application offset In an optimum installation (sufficient distance to the walls, walls made of dark material), the effect of the measurement environment is negligibly small. If an optimum installation is not feasible due to local circumstances, interference effects can be compensated by a measured value correction.

  • Page 30: User Calibration For Measuring The Total Suspended Solids (G/L Tss)

    (type and amount of total suspended solids, coloration, etc.). The results of the user calibration are input manually in the setting menu of the VisoTurb 700 IQ (see section 3.5). Setting for total Bring the sensor into the measuring position.
  • Page 31 DIN 38414). Change to the settings menu of the turbidity sensor. Fig. 4-2 VisoTurb 700 IQ settings menu for measuring the solids Select the value range for the total suspended solids contents determined during the reference measurement in the TSS range field.
  • Page 32 Measuring VisoTurb 700 IQ Menu item Settings Explanations l 0 ... 0.400 mg/l Solids range Range for entering the concentration of total suspended solids. Due to the wide l 0 ... 4.00 mg/l range, the settings range is subdivided. l 0 ... 40.0 mg/l l 0 ...
  • Page 33 VisoTurb 700 IQ Measuring Select the Save and quit menu item with and confirm with . The new settings are stored in the sensor. The turbidity sensor is calibrated for the measurement of total suspended solids. Note The total suspended solids measurement is even more precise, the better the current status of the sample corresponds to the status at the time of the user calibration.
  • Page 34 Measuring VisoTurb 700 IQ 4 - 8...

  • Page 35: Maintenance, Cleaning, Disposal, And Accessories

    Contact with the test sample can be dangerous for the user! Depending on the type of sample, suitable protective measures must be taken (protective clothing, protective goggles, etc.). The VisoTurb 700 IQ sensor does not usually require any maintenance. The continuously running ultrasound system prevents the accumulation of pollution in almost all cases.

  • Page 36: Cleaning The Sensor Shaft And Saphire Disc

    Maintenance, cleaning, disposal, and accessories VisoTurb 700 IQ Cleaning the sensor shaft and saphire disc During normal operation (e.g. municipal wastewater), cleaning is recommended: l if there is any pollution (according to visual check) l if the sensor was not in operation for a lengthy period of time but was...

  • Page 37: Accessories

    Clean the sensor shaft and the saphire disc as specified in the section C , page 2. LEANING AGENTS Then, rinse it thoroughly with tap water. Accessories Note Information on other IQ S accessories is given in the WTW ENSOR catalog and in the Internet. 5 - 3...
  • Page 38 Maintenance, cleaning, disposal, and accessories VisoTurb 700 IQ 5 - 4...

  • Page 39: What To Do If

    VisoTurb 700 IQ commissioning cleaning system. As soon as this is switched on, communication with the controller is interrupted.
  • Page 40 What to do if... VisoTurb 700 IQ Measured values too Cause Remedy high – Gas bubbles in the medium are – Check the mounting position in front of the saphire disc of the sensor (see section 3.2 and section 3.3) –...

  • Page 41: Technical Data

    VisoTurb 700 IQ Technical data Technical data General data Measuring principle Procedure for measuring scattered light measurement in accordance Turbidity measurement with EN ISO 7027 (DIN EN 27027 or ISO 7027): l 90 ° measuring angle l Measurement in formazine nephelometric units, FNU l Conversion of the values to: –...
  • Page 42 – UL 3111-1 – CAN/CSA C22.2 No. 1010.1 Electrical data Nominal voltage max. 24 VDC Note: For the VisoTurb 700 IQ there are special voltage limits for the log book messages (for details see Fig. 7-1 on page 7-4). Power consumption 5.0 W...
  • Page 43 If the operating ENSOR voltage is too low for the VisoTurb 700 IQ, a message appears in the log book. However, this is not indicated by conditions of the two voltage LEDs on the connected module (MIQ Module). These LEDs do not represent voltage ranges of the VisoTurb 700 IQ.

  • Page 44: Characteristic Data On Delivery

    Technical data VisoTurb 700 IQ Characteristic data on delivery Measuring ranges and Measured variable Measuring ranges Resolution resolutions FNU, NTU, TEF 0 ... 0.400 0.001 0 ... 4.00 0.01 0 ... 40.0 0 ... 400 0 ... 4000 mg/l SiO 0 ...

  • Page 45: Indexes

    IQ S system OG BOOK ENSOR operating manual. Note All message codes of the VisoTurb 700 IQ end with the number "341". 8.1.1 Error messages Message code Message text EA2341 Sensor temperature too high! * Check process and application...

  • Page 46: Info Messages

    Indexes VisoTurb 700 IQ Message code Message text ESD341 SensCheck: Measurement interfered * Submerse sensor in sample * Select bubble-free spot for measurement * Remove any foreign matter from sensor * Avoid influence of large foreign matter * Clean sensor...

  • Page 47: Status Info

    VisoTurb 700 IQ Indexes 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 sta- tus info of sensors consists of 32 bits, each of which can have the value 0 or 1.
  • Page 48 Indexes VisoTurb 700 IQ 8 - 4...

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