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wtw EcoLine Oxi 170 Operating Manual

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  • Page 2: General Informations

    Copyright  Weilheim 1999, WTW GmbH & Co. KG Reprinting - even in the form of excerpts - is only allowed with the explicit written authorization of WTW GmbH & Co. KG, Weilheim.

  • Page 3: Safety Instructions

    – Opening the instrument as well as adjustment and maintenance or repair work must only be performed by personnel authorized by WTW. Depending on the severity, contravention can lead to loss of warranty. – If safe operation is no longer possible, the equipment must be taken out of service and secured against inadvertent operation by labeling with warning signs.

  • Page 4: Table Of Contents

    Oxi 170/ Contents Oxi 296 Safety Instructions ....................69 Description.......................72 Front views ......................72 Control panel .......................73 Display ......................73 Display messages ..................74 Keyboard......................76 Operating instructions ..................76 Operating levels....................77 Installation .......................79 General instructions.....................79 Power supply .......................79 “SENS-CHECK“ connection.................80 REC 1 / REC 2 connections.................80 K1 / K2 (relay contacts) ..................80 RS 485 digital interface ...............81...
  • Page 5 Oxi 170/ Contents Oxi 296 Parameterization....................100 Factory settings ....................100 Calling up the parameterization level..............101 Overview table of the submenus ..............102 Parameterization of salinity (only if ) ............102 REC 1 and REC 2 recorder outputs..............103 Relay 1 / Relay 2 ...............104 (instrument version R) Limit indicator (UL.LL)..................105 Setting the parameters for limit indicators ............105...

  • Page 6: Description

    Oxi 170/ Description Oxi 296 Front views Oxi 170 Oxi 170 Oxi 170 Oxi 296 Oxi 296...

  • Page 7: Control Panel

    Oxi 170/ Description Oxi 296 Control panel Display Oxygen measuring mode Slope of sensor Alphanumeric display: measured value, slope, user interface Dimensions: % Dimensions: mg/l Alarm display if sensor is defective Input of salinity correction Dimension: °C Relay 2 is active Calibration: AutoRead “Active “...

  • Page 8: Display Messages

    Oxi 170/ Description Oxi 296 Display messages Note: The first letter of a display message is used for designation. Configuration displays have a “C” as the first letter and a "P" identifies displays of the parameterization. Configuration: nfiguration onfiguration inity nput onfiguration onfiguration...
  • Page 9 Oxi 170/ Description Oxi 296 General: Limit ower Limit pper teresis *& elay Viewing mode: ftware version...

  • Page 10: Keyboard

    Oxi 170/ Description Oxi 296 Keyboard • Operating keys to switch between Measurement (M) and Calibration (C) • Function keys to switch between the operating levels and changing of setting values in configuration and parameterization. ESCAPE zum Verlassen eines Menüs Wert höher oder im Roll- modus nach oben DOWN...

  • Page 11: Operating Levels

    Oxi 170/ Description Oxi 296 Operating levels The instrument functions are incorporated in three levels that are consecutively structured to ensure a clear and transparent structure. This structure ensures that the user is provided with an instrument that, although it has universal options, can still be set so that unauthorized actions do not interfere with the reliable measuring mode.
  • Page 12 Oxi 170/ Description Oxi 296 Note: After a power fail, the instrument returns to the previous operating mode. All settings are preserved.

  • Page 13: Installation

    II, i.e. no protective earth conductor is required. Do not connect the protective earth conductor to a terminal potential or supply line or feed it into the instrument! Only authorized WTW technicians are allowed to change the instrument fuse.

  • Page 14: Sens-Check" Connection

    Oxi 170/ Installation Oxi 296 "SENS-CHECK" connection The "SENS-CHECK" relay is designed as a closing contact that is electrically isolated from the instrument; it is then always active (= closed) if a sensor error occurs. This message is also output on the display. Sensor errors in the switching station are displayed using the relay.

  • Page 15: Rs 485 Digital Interface (Rs Option)

    Oxi 170/ Installation Oxi 296 RS 485 digital interface (RS option) The RS 485 interface operates with differential levels that are not susceptible to interference. In this way, cable lengths of up to 1 km long can be implemented. The instruments are connected via a 2-wire line.

  • Page 16: Installation Instructions For The Oxi 170

    Oxi 170/ Installation Oxi 296 Installation instructions for the Oxi 170 Terminal assignment Terminal assignment A (RS 485 option) REC 1 + B (RS 485 option) REC 1 – GND (RS 485 option) REC 2 + Sens-Check REC 2 – Sens-Check a (sensor) K1 (R option)

  • Page 17: Connecting Trioxmatic ® 690 Or Trioxmatic ® 70X Sensors

    Oxi 170/ Installation Oxi 296 ® ® Connecting TriOxmatic 690 or TriOxmatic 70x sensors Oxi 170...
  • Page 18 Oxi 170/ Installation Oxi 296 Connecting the KI/S terminal box K 160 KI/S EK/AG or EK 170 max. cable length 100 m ® TriOxmatic 690, ® TriOxmatic 70x...
  • Page 19 Oxi 170/ Installation Oxi 296 Wiring KI/S Strip terminal Colour of wires yellow gray + shield pink blue brown green white Note: After connection of the 8-wire EK 170 cable 1 wire remains unused. The unused "wire"should be fixed in position or pinched off. Unused wires must not jut into the housing.

  • Page 20: Installation Instructions For The Oxi 296

    Oxi 170/ Installation Oxi 296 Installation instructions for the Oxi 296 Terminal assignment Terminal assignment A (RS 485) REC 1 + B (RS 485) REC 1 – GND (RS 485) REC 2 + Sens-Check REC 2 – Sens-Check a (sensor) Relay 1 b (sensor) Relay 1...

  • Page 21: Connecting Trioxmatic ® 690 Or Trioxmatic ® 70X

    Oxi 170/ Installation Oxi 296 Connecting the TriOxmatic® 690 or TriOxmatic® 70x Unused wires must not jut into the housing. Otherwise, malfunctions can occur. This especially applies to the ground wire of the mains cable. Cut off unused wires in the housing as close to the armored thread joint as possible.
  • Page 22 Oxi 170/ Installation Oxi 296 Connecting the KI/S terminal box yellow green brown pink blue gray + shield white max. cable length 100 m Cable EK/AG or EK 170 Probes that can be connected: max. cable length 100 m ® ®...
  • Page 23 Oxi 170/ Installation Oxi 296 Wiring of KI/S Strip terminal Colour of wires yellow gray + shield pink blue brown green white Note: After conncection of the 8-wire EK 170 1 wire remains unused. The unused “wire” should be fixed in position or pinched off. Unused wires must not jut into the housing.

  • Page 24: Configuration

    Oxi 170/ Configuration Oxi 296 The configuration defines the operating mode of the instrument. To do this, the configuration level is split into submenus (see the flow diagram). The submenus only offer those setting options that have not yet been automatically established on the basis of the previous configuration of the program.

  • Page 25: Calling Up The Configuration Level

    Oxi 170/ Configuration Oxi 296 Calling up the configuration level − Press the DOWN key. − Press the ENTER key. The display shows the following: The first numeral flashes. No code number is set in the delivery state. To access the configuration level −...

  • Page 26: Overview Table Of The Submenus

    Configuration Overview table of the submenus Display Description Option Basic Relay T option instrument Salinity correction Select measuring converter Select measuring range final value Select recorder 1 Select recorder 2 Assignment of the indicator relay Operating mode of the indicator relay + Menu appears in the corresponding model of the instrument.

  • Page 27: Salinity Correction

    Configuration Salinity correction The salinity correction is switched on or off in the submenu: • Correction ON • Correction OFF (delivery state) Note: Principally , the Salinity Correction menu determines whether a salinity correction should be performed. If this is switched on (ON), an entry can be made in the parameterization (PSA).

  • Page 28: Selecting The Sensor

    Configuration Selecting the sensor The following setting options can be selected: Display Sensor ® TriOxmatic without REG and LECK detection ® with TriOxmatic REG and LECK detection ® TriOxmatic with CellOx 700 REG and LECK detection − Press the UP / DOWN keys to select a sensor. −...

  • Page 29: Selecting The Measuring Range

    Configuration Selecting the measuring range The following setting possibilities are available in the submenu: 60.0 mg/l • 20.00 mg/l (only in TriOxmatic 701) • 600 % • 200.0 % (only in TriOxmatic 701) • The following measuring ranges can be selected in the menu depending on the sensor type: 20.00 mg/l...

  • Page 30: Selecting The Rec 1 Recorder Output

    Configuration Selecting the REC 1 recorder output If the recorder range is exceeded (OFL), the recorder outputs issue a constant signal of 20.5 mA. A return to the preset recorder range is performed automatically after eliminating the exceeding of the recorder range. Permissible recorder ranges depending on the measuring range: Measuring ranges 200 %...

  • Page 31: Selecting The Rec 2 Recorder Output (Only In T-Option)

    Configuration Selecting the REC 2 recorder output (only in T option) If the recorder range is exceeded (OFL), the recorder outputs issue a constant signal of 20.5 mA. A return to the preset recorder range is performed automatically after eliminating the exceeding of the recorder range. Permissible recorder ranges: -5 ...

  • Page 32: Relay 1 / Relay 2 (R Option)

    Configuration Relay 1 / Relay 2 (R option) Selecting the relay functions A function can be assigned to each relay: 'HVFULSWLRQ Function ' (no function) Relay without any function - (power supply) Contact is closed when power is applied and opens if there is a power fail ) (freeze) Is active if the measured value is frozen - e.g.

  • Page 33: Regulating Signals

    Configuration Regulating signals Limit indicator (UL.LL) The following functions can be selected: Function Description UL O upper limit – main parameter LL O lower limit – main parameter UL °C upper limit – temperature LL °C lower limit – temperature Setting: −...
  • Page 34 Parameterization The parameterization creates the numeric values of the functions for which the instrument is configured. Factory settings Adjustable function Setting Menu item Salinity correction Recorder output 1: 4 to 20 mA / 20mA/s Current range/ attenuation Recorder output 2: 4 to 20 mA / 20 mA/S Current range/ attenuation Air correction...

  • Page 35: Calling Up The Parameterization Level

    Parameterization Calling up the parameterization level − Press the DOWN key. − Press the ENTER key. The display shows the following: The first numeral flashes. No code number is set in the delivery state. To access the configuration level − press the ENTER key 3 times. If a code number was already set in an earlier parameterization, proceed as follows: −...
  • Page 36 Parameterization Overview table of the submenus Description Options Display Basic Relay T option RS 485 instrument - - - - Input of salinity Recorder output 1 Recorder output 2 Limiting value indicator Input of the current air pressure - - - - RS 485 interface Set up the code number Temperature...
  • Page 37 Parameterization REC 1 and REC 2 recorder outputs This submenu enables the setting of: • Current range − 0 to 20 mA − 4 to 20 mA • Attenuation [dI/dt] (dI = current change; dt = time change) − 0.1 mA/s −...
  • Page 38 Parameterization Relay 1 / Relay 2 (instrument version R) Limit indicator (UL.LL) submenu enables the allocation of the following values for the relay occupied by a limit function (UL.LL) in the configuration level: 1. Limiting value L (Limit) 2. Hysteresis HS (Hysteresis) 3.
  • Page 39 Parameterization Setting the parameters for limit indicators Example: Set up the upper limit for “O “ on relay 1. − Press the ENTER key to enter the submenu:: − Press the ENTER key again to set this limiting value. The first/ second numeral flashes. (depending on the measuring range).
  • Page 40 Parameterization Example: Rel 1: UL = 10 mg/l HS = 1 mg/l td = 0 Rel 2: LL = 5 mg/l HS = 1 mg/l td = 0 Measured value Rel1 11 mg/l set OG hysteresis 10 mg/l UL = upper limit 9 mg/l Measured value Rel2...
  • Page 41 Parameterization Entering the manual pressure compensation Alternatively, the current air pressure (absolute pressure!) or the site elevation (above the normal zero point) can be entered. In entering the air pressure, the default value for the site elevation is automatically adapted and vice versa. Entering the air pressure −...
  • Page 42 Parameterization RS 485 interface (RS option) The parameterization of the RS 485 interface is described in a separate manual that is included within the scope of delivery of instruments with a RS 485 interface (RS instrument version). Setting up the code The setting of a code prevents changes to the configuration and parameterization of the instrument by the unintentional or erroneous pressing of an input key.

  • Page 43: Temperature Compensation

    Parameterization Temperature compensation The -* submenu enables compensation of the temperature measuring sensor tolerances in the test probe (shifting of the zero point by a maximum of 0.5 °C). Place the measuring probe in a vessel containing at least 2 liters of water due to its thermal capacity.
  • Page 44 Parameterization Timer for an external probe cleaning unit (CS) The -/ submenu allows for the allocation of the intervals for relays, which are configured in the configuration level to work as control relay for an external probe cleaning unit (CS). The following intervals can be set: Parameter Range Meaning...
  • Page 45 Parameterization Setting the intervals − Press the ENTER key. The menu to input the cleaning interval appears with the *) display and the current value in the lower display line. − The first digit flashes. − Using the UP / DOWN keys set the flashing digit.

  • Page 46: Viewing Mode

    Viewing Mode In the viewing mode, settings can be inspected without having to input a code. However, the settings cannot be modified. Displaying the parameterization and configuration data − Press the DOWN key. − Press the ENTER key when the first numeral flashes. −...

  • Page 47: Measuring Mode

    Measuring Mode The Oxi 170 and Oxi 296 instruments are automatically set to the measuring mode following the first commissioning. Otherwise, the measuring mode - except in compelled guidance - can be called up from any operating level by pressing the M key (see also section, Operating instructions ).
  • Page 48 Calibration − Remove the sensor from the measuring medium and prepare it for calibration in the air (clean it if necessary and wait for the temperature adjusting). − Use the C key to change to the calibrating mode. Note: The calibration can be terminated by pressing the ESCAPE key.
  • Page 49 Calibration – Pressing the ENTER key causes the measured value to be displayed. However, the current outputs do not yet follow the current measured value. Sensors can now be replaced in the measuring medium. – Use the ENTER or M key to return to the normal measuring mode.

  • Page 50: Checking Mode

    If the 2 hardware was not identified, the following error message appears: )) (-*: Hardware error − Contact the technical customer service at WTW. Displaying the code number The code number is displayed in the (& submenu after pressing the ENTER key: − Press the ENTER key again to continue with...

  • Page 51: Recorder Output

    Checking Mode Recorder output 1 After pressing the ENTER key, a current of 0.1 mA is set in the * * ) submenu: − Press M to set the current to 0.1 mA. − Press C to set the current to 10.0 mA. −...

  • Page 52: Relay Test

    Checking Mode Relay test After pressing the ENTER key, the * * message flashes in the * * ) / submenu: Note: Rel 1 and Rel 2 are only addressed if the control option is present. If a relay is switched on, the relevant symbol appears on the display.
  • Page 53 Checking Mode Flowchart 0HVVHQ 9DULDQWHQ IDOVFKH HUNHQQXQJ +DUGZDUH S+ +DUGZDUH HUNDQQW 0HVVHQ .DOLEULHUHQ &...

  • Page 54: Cleaning & Maintenance

    Cleaning / Maintenance Cleaning / Maintenance The Oxi 170 and Oxi 296 instruments are largely maintenance-free. Some instructions are given here on taking care of the instruments: − Keep the instruments free from dust and dirt as far as possible. −...

  • Page 55: Troubleshooting

    Troubleshooting The following messages could occur (shown in order of priority): Reason Measure Message Serious error that does not − Send the instrument to permit any further measuring No valid calibration exists − Calibrate the instrument again (see also the chapter, Calibration ) The O 2 / temperature value −...

  • Page 56: Technical Data

    Technical Data Technical data for Oxi 170 Display Measured value LCD 7 segment • O 3-digit • Temperature 4-digit Units, settings Symbols measurement Signal input Low impedance Display and measuring 0.0 to (20) 60 mg/l; 0 to (200) 600% depending on the range sensor type 0.1 mg/l, 0.01 mg/l;...
  • Page 57 Technical Data Temperature measurement Temperature sensor NTC integrated in the sensor Accuracy ± 0.2 K ± 1 digit Additional fine adjustment of ± 0.5 K Resolution 0.1 K Inputs / outputs 7-contact round plug connection with screw fixing Sensor input Contact outputs SENS-CHECK relay Closes on sensor defect...
  • Page 58 Technical Data Electrical connection data • 230 VAC (– 15% + 10%) Voltage supply • 115 VAC (– 15% + 10%) (depending on the instrument • 24 VAC (– 15% + 10%) version) • 24 VDC (– 30% + 20%) Frequency 48 to 62 Hz Power consumption...
  • Page 59 Technical Data Technical data for Oxi 296 Display Measured value LCD 7 segment 3-digit • Temperature 4-digit • Units, settings Symbols measurement Signal input Low resistance Display and measuring 0.0 to (20) 60 mg/l; 0 to (200) 600% depending on the range sensor type Measured value resolution...
  • Page 60 Technical Data Temperature measurement Temperature sensor NTC integrated in the sensor Accuracy ± 0.2 K ± 1 digit Additional fine adjustment of ± 0.5 K Resolution 0.1 K Inputs / outputs RS-485; 2(3)- wire connection Digital interface Bus operation is possible with up to 31 units Contact outputs SENS-CHECK relay closes on sensor defect...
  • Page 61 Technical Data Protection type Lightning protector • Coarse protection 90 V / 1.5 KA (8/20µs) (inputs and outputs) • Fine protection 600 Watt Electrical instrument Safety class 2 according to IEC 1010 protection Housing IP 54 Electrical connection data • 230 VAC (– 15% + 10%) Voltage supply •...

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