wtw TresCon NOx-N Operating Manual
  1. Manuals
  2. Brands
  3. wtw Manuals
  4. Measuring Instruments
  5. TresCon NOx-N
  6. Operating manual

wtw TresCon NOx-N Operating Manual

Analyzer module
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
ba43110e05
01/2011
TresCon
Analyzer module NOx-N
TresCon N0x-N
Ser.-Nr. 00110020
WTW 82362 Weilheim Made in Germany
TresCon NOx-N
Ablauf
P1
Thermoblock
blau
blue
V1
V2
rot
blau
red
blue
Probe
H O dest.
2
Reinigungslösung
Sample
H O dest.
2
Cleaning Solution
Pumpschlauch Standard/Probe
blau / blau / blau
Pump Tube Standard/Sample
blue / blue / blue
rot
P3
red
Operating Manual

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the TresCon NOx-N and is the answer not in the manual?

Questions and answers

Related Manuals for wtw TresCon NOx-N

Summary of Contents for wtw TresCon NOx-N

  • Page 1 Operating Manual TresCon Analyzer module NOx-N TresCon N0x-N Ser.-Nr. 00110020 WTW 82362 Weilheim Made in Germany TresCon NOx-N Ablauf Pumpschlauch Standard/Probe blau / blau / blau Pump Tube Standard/Sample blue / blue / blue Thermoblock blau blue blau blue Probe H O dest.
  • Page 2 Target group This manual is intended for all persons who are familiar with the installation, operation and maintenance of WTW analyzers. Detailed information on the previous experience required and the qualification of the user are given in the chapter, S...

  • Page 3: Table Of Contents

    1.2.1 Scope of delivery ......3-5 1.2.2 Retrofitting the TresCon NOx-N ... . . 3-5 1.2.3 Connecting up the TresCon NOx-N .
  • Page 4 List of contents NOx-N 3.10 Triggering a multi-point calibration ....5-35 3.11 Switching Auto Flow on/off ..... .5-42 What to do if...

  • Page 5: Overview

    This operating manual has a modular structure, i. e. it contains a separate operating manual for the individual components of the multiparameter analyzer (see Fig. 1-1). This volume covers the operation of the TresCon NOx-N measuring module (highlighted in gray in Fig. 1-1). Structure of the...

  • Page 6: Function

    TresCon NOx-N performs an automatic zero-point calibration (AutoCal) so that the instrument can always maintain its high degree of absolute accuracy. AutoClean The TresCon NOx-N can clean the entire analyzer system itself so that the user only has to perform a minimum amount of maintenance. AutoFlow...
  • Page 7 NOx-N Overview Ablauf Schematic diagram Outlet Thermoblock blau blue blau blue H2O dest. Reinigungslösung Probe H2O dist. Cleaning solution Sample Standard/sample pump tubing: blue/blue/blue Fig. 1-2 Schematic diagram Configuration Component (quantity) Designation Valves (2) V1, V2 Pumps (1) P1 A Pressure sensors (2) P1, P2 ba43110e05...
  • Page 8 Overview NOx-N View of the TresCon TresCon N0x-N NOx-N Ser.-Nr. 00110020 WTW 82362 Weilheim Made in Germany Control LED Photometer block TresCon NOx-N Ablauf Pumpschlauch Standard/Probe blau / blau / blau Pump Tube Standard/Sample blue / blue / blue Thermoblock...

  • Page 9: Commissioning

    When the analyzer is delivered, it already has individual analyzer modules integrated in it and is ready for operation. The TresCon NOx-N is available as a retrofit kit with the following scope of delivery: ON 210: TresCon NOx-N measuring module...
  • Page 10 Switch off the TresCon at the power switch (on the mounting module stand). Open the door of the TresCon. TresCon TresCon P04-P Ser.-Nr. 00110010 WTW 82362 Weilheim Made in Germany TresCon PO4-P Ablauf Pumpschlauch Standard/Probe blau / blau / blau Pumpschlauch Reagenz orange / gelb / orange...
  • Page 11 NOx-N Overview Place the TresCon NOx-N in the mounting frame and screw it into place with the 10 screws (B). TresCon TresCon P04-P TresCon N0x-N Ser.-Nr. 00110010 Ser.-Nr. 00110020 WTW 82362 Weilheim Made in Germany WTW 82362 Weilheim Made in Germany...
  • Page 12 Overview NOx-N Cable connection Plug the open cable connector of the TresCon NOx-N into the open socket with the internal number of the mounting slot. Note The number (1...3) of the open socket must agree with the position of the TresCon NOx-N in the frame (see Fig. 1-5).
  • Page 13 Inside diameter (ID) of outlet tube: 10 mm Inside diameter (ID) of ventilation tube: 3 mm Connect the open outlet tubing of the TresCon NOx-N with the outlet adapter inside the enclosure (see Fig. 1-7). Also connect the ventilation tube to the adapter.

  • Page 14: Connecting Up The Trescon Nox-N

    Fig. 1-8 Connecting the permeate supply Note If the TresCon NOx-N measuring module is to be connected to an overflow vessel that is already installed (measuring several parameters at a single sample catch location), the overflow vessel at this position must have 3 permeate connecting pieces.
  • Page 15 NOx-N Overview Connecting the supply Push the tubes for dist. H2O and cleaning solution through the of consumables holes drilled in the bottom of the enclosure. Color coding The tubes of the consumables are nontransparent and are color coded: of the consumables Dist.
  • Page 16 Overview NOx-N Connecting the cleaning solution Cleaning solution causes severe corrosion Do not allow this substance to get into the hands of children. Wear suitable protective gloves and goggles/face mask when working with this substance. If this substance gets into the eyes, rinse thoroughly with water and consult a doctor.

  • Page 17: Initial Commissioning

    NOx-N Overview 1.2.4 Initial commissioning When the TresCon NOx-N is installed and connected, the initial commissioning can start. Note Read the B section in the T volume of this ASIC OPERATION ERMINAL operating manual if you are not yet familiar with the operation of the TresCon.

  • Page 18: Removal From Service

    Overview NOx-N Removal from service Depending on the duration of the shutdown, some precautionary measures need to be taken when removing the analyzer module from service. Shutdown of up to 7 Perform the Empty system service, see section 3.5, page 3-11. days Shutdown of more than Perform the AutoClean service, see section 3.1, page 3-3.

  • Page 19: Instrument Parameters

    NOx-N Overview Instrument parameters You can call up the following menu items via the main menu, Parameters NOx-N, and display or change parameters there. Service Performs maintenance activities with support from the service menu. Numerous service steps are described from page 3-1. AutoCal To define the parameters of the automatic calibration function for the zero point calibration, page 2-5.
  • Page 20 Overview NOx-N 1 - 16 ba43110e05 01/2011...

  • Page 21: Operation

    NOx-N Operation Operation The following sections contain all the operating steps and tasks that are required in connection with the NOx-N analyzer module. The sequence corresponds to the menu sequence of the main menu. After calling up most of the menu items, you can select the presentation of data or change mode.
  • Page 22 Operation NOx-N Note Further menu items appear if you move the cursor further down or up in the selection list! Select further menu items with 6. 2 - 2 ba43110e05 01/2011...

  • Page 23: Measuring

    ” on page 2-20.). PARAMETERS Continuous The measuring procedure consists of a sequence of several steps that measurement are listed in the following overview. Subsequently, the TresCon NOx-N remains in the "measuring" mode. The measured value is continuously updated. Program operating Step...
  • Page 24 Operation NOx-N Duration Approx. 1 ½ minutes Starting the measuring Measuring mode procedure Select TresCon NO -N: Move the arrow (cursor) with 68 to the display line of the measuring module, NOx-N. Press the key 2. The current process (e.g. Stop, Parameterizing, ...) is canceled, the measuring procedure starts.

  • Page 25: Triggering A Zero Point Calibration (Autocal)

    Triggering a zero point calibration (AutoCal) The individual steps required for a zero-point calibration run automatically and are designated by AutoCal. The TresCon NOx-N performs AutoCal at intervals. You can select the times and intervals in the AutoCal menu, see section 2.5 D...

  • Page 26: Displaying Calibration Data

    Operation NOx-N Displaying calibration data Under this menu item, you can view the result of the zero point calibration (AutoCal). Displaying the Measuring mode calibration -N with 68. Select TresCon NO -N menu with 3. The main Call up the Parameters NO menu appears on the display.
  • Page 27 NOx-N Operation Calibration data The displayed information refers to the last calibration and has the following meaning: Parameter Meaning E1H2O Absorbance of the zero point calibration for measuring NOx-N E2H2O Absorbance of the zero point calibration for background measurement Calibration error If the instrument could not determine any valid calibration data, for example because the distilled water is contaminated or the thermoblock (cell) is strongly contaminated, "err"...

  • Page 28: Service

    Operation NOx-N Service The Service menu item opens a comprehensive service menu. Note The service menu and maintenance activities are described in detail in CHAPTER AINTENANCE Displaying/changing the AutoCal parameters You can display or change the parameters of the AutoCal function in this menu.
  • Page 29 NOx-N Operation Select the parameters to be changed with 68 and switch into input mode with 3. Input the values required, digit-by-digit if necessary, with 68. Change the digit with 57. Confirm inputs with 3. If necessary, repeat steps 6 and 7 for any other parameters.

  • Page 30: Displaying/Changing Autocleanparameters

    Operation NOx-N Displaying/changing AutoCleanParameters You can display or change the parameters of the automatic AutoClean cleaning procedure. Dependency An AutoCal procedure automatically follows an AutoClean procedure. The AutoClean time and AutoCal time are linked (see below). Note You can trigger an exceptional AutoClean procedure. Read the section on page 3-3 in this manual for TARTING THE LEAN PROCEDURE...
  • Page 31 NOx-N Operation Select the parameter to be changed with 68 and switch into input mode with 3. Input the values required, digit-by-digit if necessary, with 68. Change the digit with 57. Confirm inputs with 3. If necessary, repeat steps 6 and 7 for any other parameters.

  • Page 32: Manual Correction

    (e. g. a laboratory photometer and WTW reaction cell test) and the TresCon NOx-N. The measured value from the comparison procedure is entered as the nominal value for TresCon NOx-N. From the nominal value and its own measured value, TresCon calculates a correction factor h that is used for all further measurements.
  • Page 33 TresCon NOx-N. Process instructions for Proceed as follows to determined Cnominal: the comparison measurement Use a WTW test (e.g. model 14764) for the comparison (determination of measurement. Cnominal) Measure the sample with the photometer: Perform at least 5 tests according to the operating manual of the photometer.
  • Page 34 Operation NOx-N Call up the Parameters NOx-N menu with 3. The main menu appears on the display. Select the Manual correction menu item with 68 and confirm with 3. The prompt Presentation of data/Change appears. Select the Change mode with 68 and confirm with Enter the PIN digit-by-digit with 68.
  • Page 35 NOx-N Operation Switch into input mode with 3. Input the value calculated for Cnominal from the counter measurement digit-by-digit with 68. Change the digit with 57. Note The input of Cnominal is only possible within physically sensible limits (Cmin and Cmax). The limits depend on the values of the background color from the preceding measurements.

  • Page 36: Displaying/Changing The Display Parameter

    Operation NOx-N Displaying/changing the display parameter You can display or change the dimension/citation form in this menu. Converting the citation The reference value is NOx [mg/l]. Using this value, the displays are forms and units calculated in another unit or cited form by multiplying them with the specified factor: Dimension Citation forms...
  • Page 37 NOx-N Operation Select the Change mode with 68 and confirm with Enter the PIN digit-by-digit with 68. Change to the next digit with 57 and confirm with 3. The analyzer switches into the stop mode. To change the display, switch to the input mode with 3. Select the required citation form with 68.

  • Page 38: Displaying/Changing The Attenuation Parameters

    Operation NOx-N Resolution of the The resolution of the display depends on: display Size of the measured value Dimension Citation form Dilution Note A list of the resolution for all measuring ranges, citation forms and units can be found in chapter 5 T ECHNICAL DATA Displaying/changing the attenuation parameters You can set the attenuation of the measured value calculation in four...
  • Page 39 NOx-N Operation Measuring mode -N with 68. Select TresCon NO Call up the Parameters NOx-N menu with 3. The main menu appears on the display. Select the Attenuation menu item with 68 and confirm with 3. The prompt Presentation of data/Change appears. Select the Change mode with 68 and confirm with Enter the PIN digit-by-digit with 68.

  • Page 40: Displaying/Changing The Interval Program Parameters

    Operation NOx-N 2.10 Displaying/changing the interval program parameters You can input a weekly program for the measuring intervals. This weekly program is used for adapting the analyzer to the daily load of the wastewater treatment plant. This minimizes the consumption of reagents.
  • Page 41 NOx-N Operation Changing the interval Parameter Values program Weekday Monday, Tuesday, Wednesday ... Sunday -no designation- Display of whether the interval program is active (can be changed in the Measuring Interval menu). Interval cont., 5, 10, 15, 20, 25, 30 min. Measuring mode -N with 68.
  • Page 42 Operation NOx-N Select the required weekday with 68 and confirm with 3. The cursor skips to the line of the first interval. Select the interval to be changed with 68 and switch into input mode with 3. Input the required value with 68 and confirm with 3. If necessary, repeat steps 6 to 9 for any other weekdays/ intervals.

  • Page 43: Displaying/Changing The Autoadapt Parameters

    NOx-N Operation 2.11 Displaying/changing the AutoAdapt parameters The AutoAdapt system can be used to minimize the consumption of reagents. The measuring intervals adapt automatically to the changes in concentration. How it functions The regression line is calculated from the last three measured values. The slope of the lines is evaluated.
  • Page 44 Operation NOx-N Parameter Values Changing the AutoAdapt parameter Display of whether AutoAdapt is active (can be designation- changed in the Measuring Interval menu). DC/time 0.1 - 10.0 mg/L/Measurement (NOx-N) Minimum Continuous, 5, 10, 15, 20, 25, The minimum interval 30 min interval must be selected to be Maximum...

  • Page 45: Displaying/Changing The Measuring Interval

    NOx-N Operation Input the values required, digit-by-digit if necessary, with 68. Change the digit with 57. Confirm inputs with 3. If necessary, repeat steps 6 and 7 for any other parameters. Leave the menu with 4. The request Store appears. Select Yes or No with 68 and confirm with 3.
  • Page 46 Operation NOx-N Call up the Parameters NOx-N menu with 3. The main menu appears on the display. Select the Measuring interval menu item with 68 and confirm with 3. The prompt Presentation of data/Change appears. Select the Change mode with 68 and confirm with Enter the PIN digit-by-digit with 68.

  • Page 47: Dilution Parameter

    NOx-N Operation 2.13 Dilution parameter You can select the dilution of the sample in this menu. How it functions If the sample is diluted before it reaches the TresCon, the dilution factor can be selected. The actual concentration value is displayed. Example The dilution is set to 1+3 (1 part test sample, with the aid of PurCon diluted with 3 parts H2O).
  • Page 48 The display of the dilution appears on the measured value display behind the current measured value. Here, a dilution of 1+3 has been selected by the TresCon NOx-N. Note The dilution is only displayed in the measuring mode. The dilution does not appear in the STOP mode.

  • Page 49: Maintenance

    NOx-N Maintenance Maintenance TresCon NOx-N has a service menu for maintenance activities. Always follow the instructions given in this operating manual when performing maintenance activities. Note Read chapter 2, S , in volume 1, T , of this operating AFETY ERMINAL manual before starting maintenance activities.
  • Page 50 Maintenance NOx-N Note All the menu items of the service menu cannot be displayed at the same time (see step 4). Move the selection to the lowest menu item with 6 and display further menu items with 6 again. After calling up the menu items Service intervals AutoFlow you have the option to select the Presentation of data or Change mode.

  • Page 51: Starting The Autoclean Procedure

    NOx-N Maintenance Starting the AutoClean procedure You can trigger an exceptional cleaning procedure. This AutoClean procedure has no effect on the automatic AutoClean procedures. The cleaning procedure consists of several individual steps that are listed in the following overview: Program sequence Step Instrument status/action Rinsing cleaning solution...

  • Page 52: Filling The System

    This routine fills the wet chemical system with chemicals. This determines the readiness for use of the instrument. Consumables The following consumables are required for the operation of the TresCon NOx-N: 10 l dist. H2O Caution Only use distilled water without any contamination (softener orsimilar)! Dist.
  • Page 53 NOx-N Maintenance Starting the procedure Measuring mode Select the NOx-N measuring module WITH Call up the Parameters NOx-N menu with 3. The main menu appears on the display. Select the Service menu item with 68 and confirm with 3. The service menu appears. Select the Fill system menu item with 68 and confirm with 3.
  • Page 54 Maintenance NOx-N At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. 3 - 6 ba43110e05 01/2011...

  • Page 55: Replenishing The Cleaning Solution

    NOx-N Maintenance Replenishing the cleaning solution This routine fills the wet chemical system with cleaning solution. Cleaning solution causes severe corrosion Do not allow this substance to get into the hands of children. Wear suitable protective gloves and goggles/face mask when working with this substance.
  • Page 56 Maintenance NOx-N Place a full container of cleaning solution on the tray. Connect the container. Follow the color coding (blue)! Confirm the prompts each time with 3 after checking. After the last confirmation, the procedure begins immediately and the remaining duration appears on the display. At the end of the procedure, Service finished appears on the display.

  • Page 57: Replenishing Dist. H2O

    NOx-N Maintenance Return to the service menu with 3. Replenishing dist. H2O This routine replenishes the wet chemical system with dist. H2O distilled water must be free of contamination (softener orsimilar) as it is also used for the zero-point calibration. Step Instrument status/action Program sequence...
  • Page 58 Maintenance NOx-N Caution Only use distilled water without any contamination (softener or similar)! Dist. H2O is also used for zero point calibration. Contaminated dist. H2O causes incorrect measurement results. Place a filled container of dist. H2O on the tray. Connect the container. Follow the color coding (red)! Confirm the prompts each time with 3 after checking.

  • Page 59: Emptying The System

    NOx-N Maintenance Emptying the system This service routine empties the wet chemical system of the instrument. Dist. H2O Cleaning solution Cleaning solution causes severe corrosion Do not allow this substance to get into the hands of children. Wear suitable protective gloves and goggles/face mask when working with this substance.
  • Page 60 Maintenance NOx-N Starting the procedure Measuring mode Select the NOx-N measuring module with 68. Call up the Parameters NOx-N menu with 3. The main menu appears on the display. Select the Service menu item with 68 and confirm with 3. The service menu appears. Select the Empty system menu item with 68 and confirm with 3.
  • Page 61 NOx-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. ba43110e05 01/2011 3 - 13...

  • Page 62: Displacing/Replacing Pump Tubings

    Maintenance NOx-N Displacing/replacing pump tubings The pump tubings must be displaced or replaced at regular intervals. The TresCon has timers for this that indicate the maintenance activities required when the relevant service intervals expire. This service menu "guides" you through the necessary steps. The service routine consists of two parts to enable the work on the instrument to be performed at the correct time.
  • Page 63 Step Instrument status/action Emptying the system Flush back sample Displace/replace tubing. During this operation, the TresCon NOx-N remains in the Wait mode. After confirmation of the tasks by pressing a key, the sequence of operations is continued. Part 2 Rinse sample Filling the system ½...

  • Page 64: Replacing The Pump Tubings

    Maintenance NOx-N 3.6.1 Replacing the pump tubings For this service, the consumables are first pumped back out of the system via the sample tube. Cleaning solution causes severe corrosion Do not allow this substance to get into the hands of children. Wear suitable protective gloves and goggles/face mask when working with this substance.
  • Page 65 NOx-N Maintenance Caution After step 5, you can no longer quit the procedure! Select the Replace pump tubings service with 68 and confirm with 3. The 1st part of the checklist appears on the display. Pull the sample tubing out of the overflow vessel and close the connector.
  • Page 66 After expiry of the 1st part of the routine: The 2nd part of the checklist appears on the display. During the following activities, the TresCon NOx-N remains in the Wait mode. Swing out the pump cassette. To do so, open the gripping lever.
  • Page 67 NOx-N Maintenance Standard/sample pump tubing: blue/blue/blue Replace the pump tubings. Insert a new pump tube in the pump cassette so that the second section is on the suction side. Click the cassette into place in the peristaltic pump and close the gripping lever.
  • Page 68 At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. Note After this service, the TresCon NOx-N begins with AutoCal as soon as a new measurement starts. 3 - 20 ba43110e05...

  • Page 69: Displacing The Pump Tubings

    NOx-N Maintenance 3.6.2 Displacing the pump tubings For this service, the consumables are first pumped back out of the system via the sample tube. Caution Only trained personnel is allowed to work on the analyzing section. Effects Displacing the pump Reset the Displace pump tubings tubings timer...
  • Page 70 After expiry of the 1st part of the routine: The 2nd part of the checklist appears on the display. During the following activities, the TresCon NOx-N remains in the Wait mode. 3 - 22 ba43110e05 01/2011...
  • Page 71 NOx-N Maintenance Swing out the pump cassette. To do so, open the gripping lever. Subsequently, unlock the pump cassette by pressing on the gripping lever and at the same time swing out the pump cassette. Standard/sample pump tubing: blue/blue/blue Displace the pump tubing. Insert the pump tube in the pump cassette so that the first (used) section is on the pressure side.
  • Page 72 At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. Note After this service, the TresCon NOx-N begins with AutoCal as soon as a new measurement starts. 3 - 24 ba43110e05...

  • Page 73: Replacing The Tubing System

    NOx-N Maintenance Replacing the tubing system The complete tubing system has to be replaced at regular intervals. The following components are part of the tubing system: Permeate tube All tubing sections between consumable container and thermoblock All transition tubing pieces All connection pieces (T-pieces and L-pieces) All pump tubings Tubing at the thermoblock outlet...
  • Page 74 Step Instrument status/action Emptying the system Flush back sample Replace tubing system. During this operation, the TresCon NOx-N remains in the Wait mode. After confirmation of the tasks by pressing a key, the sequence of operations is continued. Part 2...
  • Page 75 NOx-N Maintenance Replacing the Measuring mode tubing system -N analyzer module with 68. Select the NO Call up the Parameter NOx-N menu with 3. The main menu appears on the display. Select the Service menu item with 68 and confirm with 3.
  • Page 76 Maintenance NOx-N Replace tubing system. When doing this, observe the following points: – Replace the components of the tubing system step by step, starting at the overflow vessel or at the consumable containers. – Make sure that all the tubings assembled have the same dimensions (length and diameter) as the original tubings.
  • Page 77 NOx-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. Note An AutoCal is triggered when the subsequent measuring procedure starts. You cannot quit the procedure. Tubing at the inlet of Install the tubes according to the picture on the following page.
  • Page 78 Maintenance NOx-N Ismaprene (beige) pull off by hand loose coils to the photometer block 60 mm 50 mm side with chamfered openings Pos. Hose type Inner Ø Length Ismaprene (beige) 1.52 mm 70 mm Tygon (transparent) 1.52 mm 330 mm 3 - 30 ba43110e05 01/2011...

  • Page 79: Displaying/Changing Service Intervals

    NOx-N Maintenance Displaying/changing service intervals The service intervals are used to deliver information on the time remaining until important service activities. After a service interval has expired, a corresponding message is output on the display, e.g. „Replace pump tubings“. In this menu you can view and change the service intervals.
  • Page 80 Maintenance NOx-N Select the parameters to be changed with 68 and switch into input mode with 3. Input the values required, digit-by-digit if necessary, with 68. Change the digit with 57. Confirm the inputs with 3. If necessary, repeat steps 6 and 7 for any other parameters.

  • Page 81: Viewing Calibration Data Of The Multi-Point Calibration

    NOx-N Maintenance Viewing calibration data of the multi-point calibration You can view the calibration data of the last multi-point calibration under this menu item. Displaying calibration Measuring mode data Select the NOx-N measuring module with 68. -N menu with 3. The main Call up the Parameters NO menu appears on the display.
  • Page 82 Maintenance NOx-N Leave the menu with 4. Calibration parameters The information displayed refers to the last multi-point calibration and has the following meaning: Parameter Meaning Concentration of standard A Absorption of standard A Concentration of standard B Absorption of standard B Concentration of standard C Absorption of standard C Concentration of standard D...

  • Page 83: Triggering A Multi-Point Calibration

    NOx-N Maintenance 3.10 Triggering a multi-point calibration The TresCon NOx-N performs a zero-point calibration at regular intervals (see section 2.5 D ISPLAYING CHANGING THE on page 2-8). In addition, you can perform a multi-point PARAMETERS calibration with 4 calibration standards. To do so, you have to connect the respective standards to the dist.
  • Page 84 Maintenance NOx-N Preparing the To calibrate, you need the following four calibration standards (for calibration ordering information, see section 6.1 A CCESSORIES AND MATERIAL SUBJECT TO WEAR 10 mg/l NO3 50 mg/l NO3 150 mg/l NO3 250 mg/l NO3 Cleaning solution causes severe corrosion Do not allow this substance to get into the hands of children.
  • Page 85 NOx-N Maintenance Caution After step 8, you can no longer cancel the procedure. Confirm the requests of the checklist with 3 after checking them. After the last confirmation, the required calibration standards are displayed. Confirm with 3. The calibration starts with the first step (AutoClean).
  • Page 86 Maintenance NOx-N After the waiting time has expired, the following prompt appears on the display: Confirm with 3 when dist. H2O has been connected to the connection for dist. H2O (red). The zero-point measurement is performed. The remaining time appears on the display. After the waiting time has expired, the following prompt appears on the display: 3 - 38...
  • Page 87 NOx-N Maintenance Caution Standards must not be contaminated! A lid (orange) with suction tubing is included within the scope of delivery of the calibration standards. Use this lid for connecting the calibration standard. The suction tubing must be rinsed with the standard to be used beforehand. Pour a small amount of the first standard into a beaker.
  • Page 88 Maintenance NOx-N Repeat steps 13 to 17 for all other standards. After the last standard was measured, the result of the calibration (first page) appears on the display. Note The absorbance values of 0.0000 E shown here only serve as wild cards and are of no significance.
  • Page 89 NOx-N Maintenance Unscrew the lid (orange) with the suction tube from the last calibration standard. Thoroughly rinse the suction tube with distilled water. Connect the sample tubing to the overflow vessel again. Connect dist. H2O to the connection of dist. H2O (red) again. Only use distilled water free of contamination (e.g.

  • Page 90: Switching Auto Flow On/Off

    Maintenance NOx-N 3.11 Switching Auto Flow on/off The AutoFlow program is used to measure the current fluid levels of sample and reagents. Error messages are generated. The fluid levels of the reagents are determined. Fluid level measurement If the Fluid level measurement parameter is switched on, the current fluid levels in the containers are continuously determined by pressure measurements.
  • Page 91 NOx-N Maintenance Changing the AutoFlow Measuring mode parameter Select the NOx-N measuring module with 68. -N menu with 3. The main Call up the Parameters NO menu appears on the display. Select the Service menu item with 68 and confirm with 3.
  • Page 92 Maintenance NOx-N 3 - 44 ba43110e05 01/2011...

  • Page 93: What To Do If

    NOx-N What to do if... What to do if... Different types of messages can appear on the display: Error message Malfunction, TresCon is in the Stop mode Informative message Normal operation, consumables declining Service message Normal operation, interval for maintenance activities has expired Note If errors or instructive messages occur that are not listed here, further information is given in the section W...
  • Page 94 What to do if... NOx-N Cleaning solution Cause Action blocked Cleaning solution Check the tubes for breaks and foreign cannot be transported, bodies and replace them as necessary negative pressure in the (including the tube in the container). hose connector. Check whether air can pass through the vent in the container lid.
  • Page 95 Replace dist. H2O. Thoroughly rinse the container with dist. H2O. Highly ferrous test Use other cleaning solution. Especially for sample (e.g. sample highly ferrous test samples, WTW offers taken in the vicinity of a the C/N 211/Fe cleaning solution (see phosphate precipitation) section 6.1 A CCESSORIES AND MATERIAL ).

  • Page 96: Messages

    Confirm the prompt with 3; contact the An error occurred when writing parameter data. WTW service department in order to measure. Messages A text appears on the display although the measuring mode is not, however, quit. Example: Replenish dist. H2O. You can perform the relevant action later.

  • Page 97: Service Messages

    The instructions disappear and the internal timers are reset when the corresponding maintenance steps have been performed (see chapter , from page 3-1). AINTENANCE An instrument check can only be performed by the WTW service department. ba43110e05 01/2011 4 - 5...
  • Page 98 What to do if... NOx-N 4 - 6 ba43110e05 01/2011...

  • Page 99: Technical Data

    Note All specifications of the measuring accuracy refer to the use of suitable standard solutions. Note The TresCon NOx-N continues to measure outside the measuring range, although with lower accuracy. A note appears on the display. Calibration Type of calibration...
  • Page 100 Technical data NOx-N Test sample Quantity Approx. 0.5 l/h requirements Solid component < 50 mg/l Environmental Operation temp. 0 ... + 40 °C conditions Storage temperature - 25 °C ... + 60 °C Consumption 10 l dist. H2O every 120 calibrations Cleaning solution 1.5 l cleaning solution for 120 cleanings Maintenance interval...

  • Page 101: Appendix

    S/ AI - N211 821 112 (Zero standard of dist. H2O) 1.5 l cleaning solution C/ N211 821 163 1.5 l cleaning solution (consult WTW C/TCM1 821 156 service personnel before ordering) 1.5 l cleaning solution (consult WTW C/N 211/Fe...

  • Page 102: Pressure Sensors And Messages

    Appendix NOx-N Pressure sensors and messages Note During pressure measurement, the valves are immediately in the mode before the pressure measurement and the pump is off. Dist. H2O Display on the Type of error Pressure sensor screen Fill dist. H2O Dist.

  • Page 103: Rs Commands

    NOx-N Appendix RS commands The RS commands for the TresCon NOx-N all begin with TX where X is the internal number of the measuring module ( 1 ... 3). TXCCALI AutoCal is started. TresCon subsequently goes into the measuring mode. If the AutoClean interval has expired, AutoClean is called up first.
  • Page 104 Appendix NOx-N TXRCALI The data of the last zero point calibration (AutoCal) is read. Instrument response: ----------------------------------------------------------- Calibration data NOx-N Module 1 22.04.03 15:26:24 ----------------------------------------------------------- Calibration data of 22.04.03 15:25:56 E1H2O: 1.66 mE E2H2O: -74.33 mE ----------------------------------------------------------- TresCon> If the last calibration was erroneous, the data of the erroneous calibration and the last valid calibration is displayed.
  • Page 105 NOx-N Appendix TXRCINT Read the following settings: AutoCal: Time, interval AutoClean: Time, interval Instrument response: -------------------------------------------- NOx-N Module 1 22.04.03 15:30:37 -------------------------------------------- AutoCal: 07:00, 24 h AutoClean: 07:00, 24 h -------------------------------------------- TresCon> TXRCONZ Read the current concentration. Instrument response: -------------------------------------------- NOx-N Module 1 22.04.03...
  • Page 106 Appendix NOx-N TXWCALINT12 Setting of the AutoCal interval, here: 12 hours. Instrument response: -------------------------------------------- NOx-N Module 1 22.04.03 15:36:34 -------------------------------------------- AutoCal: 07:00, 12 h AutoClean: 07:00, 24 h -------------------------------------------- TresCon> TXWCALTIMExx:yy Setting of the AutoCal time (xx = hours; yy = minutes, only 00 or 30 allowed), here: 03:00 hours.

  • Page 107: Instrument Activities

    NOx-N Appendix Instrument activities State/action Pump Rinse sample Flushing back sample Feed sample Measuring mode Rinsing dist. H2O Feeding H2O dest Flush back dist. H2O Rinsing cleaning solution Flushing back cleaning solution Regulating the sample temperature Current-free path active Current-carrying path active No function Quickly to the right (80 rpm) Quickly to the left (80 rpm)
  • Page 108 Appendix NOx-N 6 - 8 ba43110e05 01/2011...

  • Page 109: Index

    NOx-N Index Index operating steps ........5-4 starting the procedure ......5-5 Accessories ..........8-1 Function ............ 3-2 Appendix ........... 8-1 Attenuation ..........4-18 how it functions ......... 4-18 AutoAdapt ..........4-23 Instrument activities AutoCal appendix ..........8-7 displaying/changing the parameters ... 4-8 Instrument check ........
  • Page 110 Index NOx-N Resolution display ..........4-18 Safety datasheets ........3-5 Scope of delivery ........3-5 Service ............5-1 Service menu ..........5-1 calling up ..........5-1 Service messages ........6-5 Switching Auto Flow on/off ......5-42 Technical data ...........7-1 Triggering a multi-point calibration ..5-35 Troubleshooting .........6-1 View calibration data .......5-33 What to do if ..........6-1 7 - 2 ba43110e05...
  • Page 112 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...

This manual is also suitable for:

Trescon nox-n/sak

Table of Contents