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wtw TresCon NH4-N Operating Manual

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TresCon BA43111e07 operating manual
Analyzer module NH4-N
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  • Page 1 TresCon BA43111e07 operating manual Analyzer module NH4-N  Remove this cover sheet!  Insert the operating manual in the TresCon main folder in the 2nd, 3rd or 4th position depending on the mounting slot!
  • Page 3 Operating manual TresCon Analyzer module NH4-N TresCon NH4-N Ser.-Nr. 00110010 WTW 82362 Weilheim Made in Germany TresCon NH4-N Meßkette/Probe Ablauf Pumpschlauch Standard/Probe rot / rot / rot Pumpschlauch Reagenz orange / gelb / orange Thermoblock blau grün Pump Tube Standard/Sample...
  • Page 4 Target group This manual is intended for all persons who are familiar with the instal- lation, operation and maintenance of WTW analyzers. Detailed information on the previous experience required and the quali- fication of the user are given in the chapter, S...

  • Page 5: Table Of Contents

    1.2.1 Scope of delivery ......1-5 1.2.2 Retrofitting the TresCon NH4-N ... . . 1-6 1.2.3 Connecting up the TresCon NH4-N .
  • Page 6 List of contents NH4-N 3.11 Displaying/changing service intervals ....3-42 3.12 Switching AutoFlow on/off ..... .3-44 What to do if...

  • Page 7: Overview

    NH4-N Overview 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 analyzer module for NH4-N (Fig. 1-1, highlighted in gray).

  • Page 8: Function

    To do so, aqueous ammonium solutions of different concentrations are used as calibration standards.  AutoClean Moreover, the TresCon NH4-N can clean the entire analyzer system itself so that the user only has to perform a minimum amount of maintenance.
  • Page 9 NH4-N Overview Schematic diagram Standard/sample pump tubing: red/red/red Reagent pump tubing: orange/yellow/orange Fig. 1-2 Schematic diagram Configuration Component (quantity) Designation Valves (4) V1,...V4 Pumps (1) P1A/B Pressure sensors (3) P1, P2, P3 ba43111e07 05/2017 1 - 3...
  • Page 10 Overview NH4-N View of the TresCon NH4-N TresCon NH4-N Ser.-Nr. 00110010 WTW 82362 Weilheim Made in Germany Control LED Electrode Thermoblock TresCon NH4-N Meßkette/Probe Ablauf Pumpschlauch Standard/Probe rot / rot / rot Pumpschlauch Reagenz orange / gelb / orange Thermoblock...

  • Page 11: Commissioning

    1.2.1 Scope of delivery When the analyzer is delivered, it already has individual analyzer modules integrated in it and is ready for use. TresCon NH4-N is available as a retrofit kit with the following scope of delivery:  TresCon NH4-N analyzer module ...

  • Page 12: Retrofitting The Trescon Nh4-N

    Overview NH4-N 1.2.2 Retrofitting the TresCon NH4-N This section is only necessary if the TresCon NH4-N was purchased as a retrofit kit. Preparatory Installing the TresCon NH4-N in a measuring system can -depending activities on the configuration- necessitate various preparations: ...
  • Page 13 Switch off the TresCon at the power switch (on the mounting module stand). Open the door of the TresCon. TresCon 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...
  • Page 14 Overview NH4-N Place the TresCon NH4-N in the mounting frame and screw it into place with the 10 screws (B). TresCon TresCon N0x-N TresCon NH4-N Ser.-Nr. 00110020 Ser.-Nr. 00110010 WTW 82362 Weilheim Made in Germany WTW 82362 Weilheim Made in Germany...
  • Page 15 NH4-N Overview Cable connection Plug the open cable connector of the TresCon NH4-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 NH4-N in the frame (see figure).
  • Page 16 Inside diameter (ID) of outlet tube: 10 mm Inside diameter (ID) of ventilation tube: 3 mm Connect the open outlet tube of the TresCon NH4-N to the adapter inside the enclosure (see Fig. 1-7). Also connect the ventilation tube to the adapter.

  • Page 17: Connecting Up The Trescon Nh4-N

    Connecting the Feed the permeate tubing of the TresCon NH4-N (black, ID = permeate supply 1.5 mm) through the hole drilled in the bottom of the enclosure. Insert the permeate tubing into the overflow vessel provided. Drilled hole...
  • Page 18 Overview NH4-N Note If the TresCon NH4-N 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. If this is not the case, replace the overflow vessel.
  • Page 19 NH4-N Overview Vent Color Coding Fig. 1-9 Color coding Connecting the cleaning Place a full container of cleaning solution (10% citric acid) on solution the tray. Connect the (blue) screw cap with the (blue) suction hose (see Fig. 1-9). Connecting standard A Place a full container of standard A on the tray.
  • Page 20 Overview NH4-N Connect the (green) screw cap with the (green) suction hose (see Fig. 1-9). When doing so make sure the vent in the lid is free and dry. 1.2.4 Installing the electrode An electrode of type NH500/TC is contained within the scope of delivery.

  • Page 21: Installing The Electrode

    NH4-N Overview Note Keep the transport protection. It protects the measuring block against contamination when no electrode is installed. Installing the electrode Insert the prepared electrode into the flow-thru vessel: Twist the electrode in the direction of rotation and, at the same time, pull it (4).

  • Page 22: Initial Commissioning

    Overview NH4-N 1.2.5 Initial commissioning When the TresCon NH4-N is installed and connected, the initial commissioning can be started. 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 23: Removal From Service

    NH4-N Overview 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 3.7, page 3-17. days Remove the electrode and store the electrode correctly as described in the manual of the electrode.

  • Page 24: Instrument Parameters

    Overview NH4-N Instrument parameters You can call up the following menu items via the main menu, Parameters NH4-N, and display or change parameters there.  Display of calibration data To display the values of the last calibration, page 2-6  Service To perform maintenance activities with support from the service menu.

  • Page 25: Operation

    Operation The following sections contain all the operating steps and tasks that are required in connection with the TresCon NH4-N. 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 26 Operation NH4-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 ba43111e07 05/2017...

  • Page 27: Measuring

    Measuring interval, Interval program and AutoAdapt menus. Continuous The measuring procedure consists of a sequence of several steps that measurement are listed in the following overview. Subsequently, the TresCon NH4-N remains in the "measuring" mode. The measured value is continuously updated. Step Instrument status/action...
  • Page 28 Starting the measuring Measuring mode procedure Select TresCon NH4-N: Move the arrow (cursor) with 68 to the display line of the analyzer module, NH4-N. Press the 2 key. The current process (e.g. Stop, Parameterizing, ...) is canceled, the measuring procedure starts.

  • Page 29: Manually Triggering (Autocal) Calibration

    Manually triggering (AutoCal) calibration The individual steps required for a calibration run automatically and are designated by AutoCal. The TresCon NH4-N performs AutoCal at intervals. You can select the times and intervals in the AutoCal menu, see section 2.5 D...

  • Page 30: Displaying Calibration Data

    AutoCal procedure with this menu item. Displaying calibration Measuring mode data Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Confirm the menu item Display calibration data with 3 . The current calibration data appears on the display.
  • Page 31 NH4-N Operation Calibration data The displayed information refers to the last calibration and has the following meaning: Parameter Meaning Standard A Concentration of NH -N [mg/l] in standard A Standard B Concentration of NH4-N [mg/l] in standard B Electrode voltage of standard A (allowable range: - 350 mV ...

  • Page 32: Service

    Operation NH4-N Service The Service menu item opens a comprehensive service menu. Note The service menu and maintenance activities are described in detail in chapter 3, M AINTENANCE Displaying/changing the AutoCal parameters You can display or change the parameters of the AutoCal function in this menu.
  • Page 33 Setting the AutoCal time in this menu also changes the AutoClean time automatically (see section 2.6 on page 2-11). Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display.
  • Page 34 Operation NH4-N Input the PIN digit-by-digit with 68. Change the digit with 57 and confirm with 3. The analyzer switches into STOP mode. 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.

  • Page 35: Displaying/Changing Autoclean Parameters

    1, 2, 3, 4, 6, 12, 24 ... 168 h (from 24 h, adjustable in 12 h-steps) Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the AutoClean menu item with 68 and confirm with 3.
  • Page 36 Operation NH4-N Switch into input mode with 3. Input the values required, digit-by-digit if necessary, with 68. Change the digit with 57. Leave the menu with 4. The request Store appears. Select Yes or No with 68 and confirm with 3. 2 - 12 ba43111e07 05/2017...

  • Page 37: Displaying/Changing The Display Parameters

    NH4-N Operation Displaying/changing the Display parameters You can display or change the dimension/citation form in this menu. Converting the citation The reference quantity is NH4-N (ammonium nitrogen NH -N) in forms and units mg/l. Using this value, the displays are calculated in another unit or cited form by multiplying them with the specified factor.
  • Page 38 Operation NH4-N Changing parameters Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the Presentation of data menu item with 68 and confirm with 3. The prompt Presentation of data/Change appears.

  • Page 39: Displaying/Changing The Attenuation Parameters

    NH4-N Operation 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. Resolution of the The resolution of the display depends on: display ...
  • Page 40 Operation NH4-N Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-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.

  • Page 41: Displaying/Changing The Interval Program Parameters

    NH4-N Operation 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 42 Interval cont., 10, 15, 20, 25, 30, 60 min. Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the Interval program menu item with 68 and confirm with 3.
  • Page 43 NH4-N Operation 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 7 to 9 for any other intervals.

  • Page 44: Displaying/Changing The Autoadapt Parameters

    Operation NH4-N 2.10 Displaying/changing the AutoAdapt parameters The AutoAdapt system can be used to minimize the consumption of reagents. The measuring intervals adapt automatically to 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 45 Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the AutoAdapt menu item with 68 and confirm with 3. The prompt Presentation of data/Change appears.

  • Page 46: Displaying/Changing The Measuring Interval

    Measuring interval 10, 15, 20, 25, 30, 60 min. AutoAdapt, interval program, continuous Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. 2 - 22 ba43111e07 05/2017...
  • Page 47 NH4-N Operation 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 Input the PIN digit-by-digit with 68. Change the digit with 57 and confirm with 3. The analyzer switches into STOP mode.

  • Page 48: Displaying/Changing The Dilution Parameter

    1+1, 1+2, 1+3, 1+4, 1+5, 1+6, 1+7, 1+8, 1+9, 1+11, 1+13, 1+15, 1+17, 1+19 Measuring mode Select TresCon NH4-N with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the Dilution menu item with 68 and confirm with 3.
  • Page 49 Measuring mode: Display of the dilution As soon as a measured value is displayed, the display of the dilution appears after the measured value of the TresCon NH4-N. Here, a dilution of 1+3 is selected. ba43111e07 05/2017 2 - 25...
  • Page 50 Operation NH4-N 2 - 26 ba43111e07 05/2017...

  • Page 51: Maintenance

    NH4-N Maintenance Maintenance TresCon NH4-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 52 Maintenance NH4-N Calling up the service Measuring mode menu Select the NH4-N analyzer module with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the Service menu item with 68 and confirm with 3.
  • Page 53 NH4-N Maintenance Attention If you select the Presentation of data mode, the analyzer continues to run in the background. If you select the Change mode, after the PIN has been entered, the analyzer goes into the STOP mode as important operating parameters could be changed.

  • Page 54: Starting The Autoclean Procedure

    Maintenance NH4-N 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 Rinse with cleaning solution but without any reagent...

  • Page 55: Filling The System

    Only start this service during initial commissioning or when returning the instrument to service. Consumables The following consumables are required for the operation of the TresCon NH4-N:  1.5 l standard A  1.5 l standard B  1.5 l cleaning solution (10% citric acid) ...
  • Page 56 Maintenance NH4-N Duration approx. 3 minutes Note You cannot quit the procedure. At the end of the filling procedure, an AutoClean (cleaning) and calibration procedure are triggered. Starting the procedure Measuring mode Select the NH4-N analyzer module with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display.
  • Page 57 NH4-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. ba43111e07 05/2017 3 - 7...

  • Page 58: Replenishing The Cleaning Solution

    Maintenance NH4-N Replenishing the cleaning solution This routine replenishes the wet chemical system with cleaning solution (10% citric acid). Program sequence Step Instrument status/action Rinse with cleaning solution but without any reagent ½ Duration approx. minute Note You cannot quit the procedure. Starting the procedure Measuring mode Select the NH4-N analyzer module with 68.
  • Page 59 NH4-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. ba43111e07 05/2017 3 - 9...

  • Page 60: Replenishing Standard A

    Maintenance NH4-N Replenishing standard A This routine fills the wet chemical system with standard A Step Instrument status/action Program sequence Rinse standard A without any reagent ½ Duration approx. minute Note You cannot quit the procedure. Starting the procedure Measuring mode Select the NH4-N analyzer module with 68.
  • Page 61 NH4-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. ba43111e07 05/2017 3 - 11...

  • Page 62: Replenishing Standard B

    Maintenance NH4-N Replenishing standard B This routine fills the wet chemical system with standard B. Program sequence Step Instrument status/action Rinse standard B without any reagent approx. ½ Duration minute Note You cannot quit the procedure. Starting the procedure Measuring mode Select the NH4-N analyzer module with 68.
  • Page 63 NH4-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. ba43111e07 05/2017 3 - 13...

  • Page 64: Replenishing The Reagent

    Maintenance NH4-N Replenishing the reagent This routine fills the wet chemical system with reagent. This establishes the readiness for use of the instrument. The reagent must be prepared according to section 6.6 P . Reagent contains REPARING THE REAGENT NaOH. Reagent causes severe corrosion Do not allow this substance to get into the hands of children.
  • Page 65 NH4-N Maintenance Starting the procedure Measuring mode Select the NH4-N analyzer module with 68. Call up the Parameters NH4-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 Replenish reagent menu item with 68 and confirm with 3.
  • Page 66 Maintenance NH4-N Return to the service menu with 3. 3 - 16 ba43111e07 05/2017...

  • Page 67: Emptying The System

    NH4-N Maintenance Emptying the system This service routine empties the wet chemical system of the instrument.  Standard A  Standard B  Cleaning solution (10% citric acid)  Reagent (NaOH) Reagent 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 68 Maintenance NH4-N Duration approx. 5 minutes Attention The pump empties the system via the tubes. If the containers are not removed, the reagent and standards will become unusable! You cannot quit the procedure. Preparation Pull the sample tubing out of the overflow vessel. Disconnect the tubes from the consumables containers.
  • Page 69 NH4-N Maintenance At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. ba43111e07 05/2017 3 - 19...

  • Page 70: Displacing/Replacing Pump Tubings

    Maintenance NH4-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 71 Flush back the sample without any reagent Flush back the sample with reagent Displace/replace tubing. During this operation, the TresCon NH4-N remains in the Wait mode. After confirmation of the tasks by pressing a key, the sequence of operations is continued.

  • Page 72: Replacing The Pump Tubings

    Maintenance NH4-N 3.8.1 Replacing the pump tubings For this service, the consumables are first pumped back out of the system via the sample tube. Reagent 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 73 NH4-N Maintenance Attention After step 5, you can no longer quit the procedure! Select the Replace the 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. Insert the open end of the tube into a collecting container.
  • Page 74 Maintenance NH4-N After the 1st part of the routine expires, the 2nd part of the checklist appears on the display. 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.
  • Page 75 NH4-N Maintenance Standard/sample pump tubing: red/red/red Reagent pump tubing: orange/yellow/orange 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 76 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 NH4-N begins with AutoCal as soon as a new measurement starts. 3 - 26 ba43111e07...

  • Page 77: Displacing The Pump Tubings

    NH4-N Maintenance 3.8.2 Displacing the pump tubings For this service, the consumables are first pumped back out of the system via the sample tube. Attention Only specially trained employees are allowed to work on the analyzing section. Effects Displacing the pump The Displace pump tubings tubings timer is reset...
  • Page 78 After the 1st part of the routine expires: The 2nd part of the checklist appears on the display. During this operation, the TresCon NH4-N remains in the Wait mode. 3 - 28 ba43111e07 05/2017...
  • Page 79 NH4-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: red/red/red Reagent pump tubing: orange/yellow/orange Displace the pump tubing.
  • Page 80 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 NH4-N begins with AutoCal as soon as a new measurement starts. 3 - 30 ba43111e07...

  • Page 81: Exchanging The Membrane Cap / Electrode

    NH4-N Maintenance Exchanging the membrane cap / electrode This service step is used to renew the membrane cap of the electrode or the electrode itself. Note Instructions on how to exchange the membrane cap of the dismantled electrode can be found in the operating manual of the electrode. Ordering information about electrodes and membrane caps can be found in section 6.2 A CCESSORIES AND MATERIAL SUBJECT TO WEAR...
  • Page 82 Maintenance NH4-N Unscrew the knurled screws on the measuring block and remove the plexiglass cover (1). Locking ring Direction of rotation Open the locking ring and disconnect the connecting cable (2). Unscrew the electrode from the flow-thru vessel: Turn it in the direction of rotation and, at the same time, pull it (3).
  • Page 83 NH4-N Maintenance Locking ring Direction of rotation Connect the connecting cable and screw the locking ring tight (5). Replace the plexiglass cover and fix it with the knurled screws. Confirm the prompts of the checklist with 3 after checking. The system is filled. The remaining time appears on the display.
  • Page 84 Maintenance NH4-N At the end of the procedure, Service finished appears on the display. Return to the service menu with 3. Note The parameters of the electrode have been changed. An AutoCal procedure (calibration) is triggered when the subsequent measuring procedure starts.

  • Page 85: Replacing The Tubing System

    NH4-N Maintenance 3.10 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, including the Viton tubing on the tubing coil ...
  • Page 86 Flush back the sample without any reagent Flush back the sample with reagent Replace tubing system. During this operation, the TresCon NH4-N remains in the Wait mode. After the tasks are confirmed by pressing a key, the sequence of operations is continued.
  • Page 87 NH4-N Maintenance Attention After step 9 of the following instructions, you can no longer quit the procedure! Preparation Pull the sample tubing out of the overflow vessel. Unscrew all tubings from the consumable containers. Place a suitable collecting container (recommended volume 0.5 l) on the tray of reagents.
  • Page 88 Maintenance NH4-N After completion of the 1st part of the routine, the 2nd part of the checklist appears on the display. 3 - 38 ba43111e07 05/2017...
  • Page 89 NH4-N Maintenance 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 90 Maintenance NH4-N 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 the Install the tubes according to the picture on the following page. Please thermoblock observe the following points: ...
  • Page 91 NH4-N Maintenance loose windings to thermoblock 70 mm upper T-piece Side with chamfered openings 3 windings to upper T-piece 70 mm Side with chamfered openings Pos. Hose type Inner Ø Length Viton (black) 1.5 mm 70 mm Tygon (transparent) 1.52 mm 360 mm Viton (black) 1.5 mm...

  • Page 92: Displaying/Changing Service Intervals

    Maintenance NH4-N 3.11 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 messages is output on the display, e.g. "Replace tubing system". You can display or change service intervals in this menu.
  • Page 93 NH4-N Maintenance 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 input with 3 and, if required, repeat steps 5 and 6 for any other parameters.

  • Page 94: Switching Autoflow On/Off

    Maintenance NH4-N 3.12 Switching AutoFlow on/off The AutoFlow program is used to measure the current fluid levels of sample and reagents. As a result:  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 95 NH4-N Maintenance the appendix, section 6.3 P on page RESSURE SENSORS AND MESSAGES 6-5. Switching AutoFlow Measuring mode on/off Select the NH4-N analyzer module with 68. Call up the Parameters NH4-N menu with 3. The main menu appears on the display. Select the Service menu item with 68 and confirm with 3.
  • Page 96 Maintenance NH4-N 3 - 46 ba43111e07 05/2017...

  • Page 97: What To Do If

    NH4-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 98 What to do if... NH4-N Standard A empty Cause Action No more standard A in Replace the container with a full one. the container. Start the Replenish standard A service. Standard B blocked Cause Action Standard B cannot be Check the tubes for breaks and foreign transported, negative bodies and replace them as necessary pressure in the hose...
  • Page 99 Replace the electrode/membrane. outside the allowable range. Reference voltage U Replace the electrode/membrane. lies outside the allowable range. Thermoblock defective Cause Action The thermoblock cannot Contact the WTW service department. be brought to the required final temperature. ba43111e07 05/2017 4 - 3...
  • Page 100 What to do if... NH4-N Contact the service Cause Action department of WTW Error within the software Contact the WTW service department. or hardware. Read error: Use factory Cause Action setting YES Confirm the prompt with 3 to perform a An error occurred when reading parameter data.

  • Page 101: Notes

    NH4-N What to do if... Notes A text appears on the display although the measuring mode is not, however, quit. Example Replenish reagent. You can perform the relevant measurement later. The following overview contains all the possible instructive messages and the necessary measures. Replenish reagent Cause Action...

  • Page 102: Service Messages

    Interval tubing system Lifetime of the tubing Perform the Replace tubing 180 days system is exceeded. system service. Instrument check Cause Action Interval A general instrument Contact the service maintenance is department of WTW. necessary. 4 - 6 ba43111e07 05/2017...

  • Page 103: Technical Data

    NH4-N Technical data Technical data Measurement Measuring principle Potentiometric measurement Measuring method Gas-sensitive ammonia electrode Measuring range mg/l mmol/l -N or 0.1 - 1000 / 1280 0.01 - 71.00 -N / NH Resolution Resolution Range mg/l 0.01 mg/l 0.10 ... 9.99 mg/l -N or 0.1 mg/l 10.0 ...
  • Page 104 HQ. The age of the electrode may affect the measuring accuracy. Note The TresCon NH4-N continues to measure outside the measuring range with lower accuracy. A note appears on the display. Calibration Type of calibration...
  • Page 105 NH4-N Technical data Reagent consumption 10 l reagent depending on the selected meas. interval Measuring interval Number of days cont. approx. 14 10 min 15 min 20 min 25 min 30 min 60 min 1.5 l standard A/B 60 calibration procedures in the calibration mode, HQ AutoCal interval Number of days...
  • Page 106 Technical data NH4-N Recorder end Measuring range NH µmol/l 5 - 4 ba43111e07 05/2017...

  • Page 107: Appendix

    NH4-N Appendix Appendix AutoTherm The TresCon NH4-N is equipped with an automatic temperature stabilization procedure that ensures the highest precision of the measurement and the optimum lifetime of the membrane and electrode. How it functions A 2-point control procedure causes the temperature at the measuring device to always remain constant within a small range.
  • Page 108 Appendix NH4-N Time dependency The relationship of the block temperature to the ambient temperature with respect to time is shown in Fig. 6-2. At time T2, the ambient temperature reaches 30 °C. As a result, the nominal temperature increases to 40 °C. The block temperature follows this value. At time T3, the ambient temperature drops below 25 °C.

  • Page 109: Accessories And Material Subject To Wear

    NH4-N Appendix Accessories and material subject to wear Description Model Order no. 1.5 l standard AI 1.0 mg/l NH4-N S/ AI - A111 821 100 1.5 l Standard AII 5.0 mg/l NH4-N S/ AII - A111 821 101 1.5 l standard BI 10.0 mg/l NH4-N S/ BI - A111 821 102 1.5 l standard BII 50.0 mg/l NH4-N...
  • Page 110 Appendix NH4-N Description Model Order no. Empty 1.5 l container BEH/ T 1,5 821 017 Overflow vessel TC/ÜB 1 821 004 Overflow vessel with valve TC/ÜB V 821 005 Note Specifications of accessories and consumables for the individual analyzer modules are given in chapter A of the corresponding PPENDIX section of this operating manual (e.g.

  • Page 111: Pressure Sensors And Messages

    NH4-N Appendix Pressure sensors and messages The following table shows the correlation between the fluid level measurement result and the internal error message, Ex or Hx. Note During pressure measurement, the valves are immediately in the mode before the pressure measurement and the pump is off. Fluid Sample Std.
  • Page 112 Appendix NH4-N Standard A Display on the screen Type of error Pressure sensor Replenish standard A Standard A must be filled -60 cm < h1 < 4 cm Standard A clogged Standard A clogged h1 < -60 cm Standard A empty Standard A empty h1 >...

  • Page 113: Rs Commands

    NH4-N Appendix RS commands The RS commands for the TresCon NH4-N all begin with TX where X is the internal number of the analyzer 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 114 Appendix NH4-N TXRCALI Read the calibration data. Instrument response: Calibration data NH4-N Module 1 23.04.03 13:11:00 ----------------------------------------------------------- Calibration data of 23.04.03 07:50:59 Standard A : 5.00 mg/l NH4-N : -78.0 mV Standard B : 50.00 mg/l NH4-N : -137.0 mV Srel : 0.95 : -36.8 mV...
  • Page 115 NH4-N Appendix TXRGPAR Read the instrument parameters. Instrument response: ----------------------------------------------------------- Selected parameters NH4-N Module 1 23.04.03 13:12:33 ----------------------------------------------------------- Display : NH4-N mg/l Standard A : 5.00 mg/l Standard B : 50.00 mg/l AutoCal time : 07:00 h AutoCal interval : 24 h CAL Mode : HQ AutoClean time...

  • Page 116: Instrument Activities

    Appendix NH4-N TXWCLEANINT12 Setting of the AutoClean interval, here: 12 hours. Instrument response: -------------------------------------------- NH4-N Module 1 22.04.03 15:37:19 -------------------------------------------- AutoCal: 03:00, 12 h AutoClean: 03:00, 12 h -------------------------------------------- TresCon> Instrument activities Activity V2 V3 V4 Pump Rinse with sample but without any reagent 0 Flush back the sample without any reagent Rinse with sample with reagent...
  • Page 117 NH4-N Appendix Activity V2 V3 V4 Pump Flush back standard B without any reagent Flush back standard B with reagent Rinse cleaning solution without any reagent Flush back cleaning solution without any reagent Rinse with cleaning solution with reagent Flush back the cleaning solution with reagent Wait for the reaction of the sample Wait for the reaction of standard A...

  • Page 118: Preparing The Reagent

     10 l container with stopper (contained within the scope of delivery of Instruments the TresCon NH4-N) Materials 10 l reagent requires  Reagent R/ A111 with – Substance A: 1 portion of sodium hydroxide pellets (NHP-A100) –...
  • Page 119 NH4-N Appendix Water hardness of the Depending on the water hardness of the sample, up to four times the sample amount of Na EDTA (substance B) must be used. Substance B is obtained under the designation R/ ADD/ TC. Substance A in 10 liter Max.
  • Page 120 Appendix NH4-N 6 - 14 ba43111e07 05/2017...

  • Page 121: Index

    NH4-N Index Index Accessories ..........6-3 Instrument activities Appendix ........... 6-1 appendix ........... 6-10 Attenuation ..........2-15 Instrument parameters ......1-18 how it functions ......... 2-15 Instrument states ........6-6 AutoAdapt ..........2-20 Interval program ........2-17 AutoCal changing ........... 2-18 displaying/changing the parameters ...
  • Page 122 Index NH4-N Safety datasheets ........1-5 Service ............3-1 Service menu ..........3-1 calling up ..........3-2 Technical data ...........5-1 Troubleshooting .........4-1 What to do if ..........4-1 7 - 2 ba43111e07 05/2017...

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