OOM 223 Transmitter for Dissolved Oxygen

Transcription

1 BA 199e00/ Software version: 2.10 or higher OOM 223 Transmitter for Dissolved Oxygen Operating Instructions CAL REL REL1 REL2 ALARM REL1 REL2

2 Need information on the instrument? Please read the following chapters: General information Safety You wish to install the instrument. The required steps are described in this chapter: Installation You wish to operate or reconfigure the instrument. The operating concept is explained in these chapters: Operation Instrument configuration Need help with problems or maintenance? Please refer to these chapters: Maintenance and troubleshooting Diagnosis and corrective maintenance Diagnosis and corrective maintenance Accessories % Ω C Technical data Appendix Index

3 liquisys S COM 223 / 253 Table of contents TABLE OF CONTENTS OOM223E00.CHP 1 General information Symbols used Storage and transport Unpacking Packaging and disposal Product structure Safety Intended application General safety instructions Installation, start-up, operation Monitoring and safety features Immunity to interference Declaration of conformity Installation Measuring system Abmessungen Electrical connection Sensor installation and measuring cable connection Operation Operator interface Display Key functions Auto / manual mode of operation Operating concept Access codes Display during measurement Calibration Instrument configuration Start-up System configuration Current outputs Monitoring functions Relay contact configuration Service I Service II Calibration Maintenance and troubleshooting Definition of terms Safety instructions Troubleshooting common problems Problem elimination based on error messages Diagnosis and corrective maintenance Definition of terms Safety instructions Diagnosis Optoscope service equipment with Scopeware Corrective maintenance of measuring system Accessories Technical data Appendix Index Endress+Hauser 1

4 General information OOM General information 1.1 Symbols used Warning: This symbol alerts to hazards which may cause serious injuries as well as damage to equipment if ignored. Note: This symbol indicates important items of information. Ignoring this information may result in malfunction. 1.2 Storage and transport The packaging material used to store or transport the transmitter must provide shock protection. Optimal protection is provided by the original packaging materials. Conformance with the ambient conditions (see Technical data) must be assured. 1.3 Unpacking Verify that the packaging and contents are undamaged! Inform the post office or freight carrier of any damage. Damaged merchandise must be retained until the matter has been settled. Check that the delivery is complete and agrees with the shipping documents and your order (refer to nameplate for type and version). Keep the original packaging materials for future storage or shipping of the instrument. If you have any questions, consult your supplier or the Endress+Hauser sales agency in your area (see back cover of these operating instructions for addresses). The delivery includes: Transmitter OOM 223 Operating instructions 199e00 Panel-mounted instrument: 1 set of plug-in screw terminals 2 fastening clips 1.4 Packaging and disposal Package the assembly properly for reuse at a later point in time. Optimal protection is provided by the original packaging materials. Observe local regulations for disposal. 2

5 OOM 223 General information OOM223E01.CHP 1.5 Product structure You can identify the instrument version by the order code on the nameplate. Code liststherelease code for software upgrades forthe Plus package. OOM 223 diss. oxygen / Gelöstsauerstoff order code / Best.Nr. : OOM 223-DX0110 serial no. / Ser.-Nr. : Code: 1234 measuring range / Messbereich : mg/l %SAT temperature / Temperatur : C output 1 / Ausgang 1 : 0/ ma output 2 / Ausgang 2 : 0/ ma mains / Netz : 230 VAC 50/60 Hz 7,5 VA prot. class / Schutzart : IP54 / IP30 ambient temp. / Umgebungstemperatur: C B TYPO2223.CDR Fig. 1.1 Nameplate of OOM 223 OOM 223 / 253 Version DX DS Oxygen measurement with OOS 4 / OOS 4HD Oxygen measurement with OOS 4 / OOS 4HD, additional functions (Plus package) Power supply V AC V AC V AC 8 24 V AC/DC Measurement output 0 Oxygen 1 Oxygen and temperature Contacts 05 No additional contacts 10 2 contacts (limits / PID / timer) 16 4 contacts (limits / PID / timer) OOM223- complete order code Additional functions of the Plus Package (version DS) Automatic correction of air pressure for concentration measurement, field A2 Current output table, fields O23x Monitoring of sensor and process, function group P Automatic start of cleaning function, field F8 3

6 Safety OOM Safety 2.1 Intended application The Transmitter OOM 223 is a field-tested and reliable transmitter used to determine the oxygen concentration of liquid media. The OOM 223 is particularly suitable for use in the following areas of application: Sewage treatment plants Wastewater treatment Drinking water Water conditioning and monitoring Surface water (rivers, lakes, oceans) Fish farming 2.2 General safety instructions This device has been manufactured for safe operation according to the state of the art in engineering and conforms to the applicable regulations and European standards (see Technical data). It has been designed according to EN and has left the manufacturer s works in perfect condition. However, if used improperly or for purposes other than the intended purpose, it may be dangerous, e.g. due to incorrect connection. Warning: Operating this instrument in any way other than as described in these instructions may compromise the safety and function of the measuring system and is therefore impermissible. The notes and warnings in these installation and operating instructions must be strictly adhered to! 2.3 Installation, start-up, operation Warning: This device may only be installed, connected electrically, commissioned, operated and serviced by properly trained personnel authorized by the system operator. The personnel must be familiar with these operating instructions and must adhere to the instructions described therein. Make sure that the power supply ratings match the data specified on the nameplate before you connect the instrument to a power source. A clearly identified mains disconnecting device must be installed close to the instrument. Live components can be touched through the vent slots in the housing and the openings on the rear of the housing. Do not insert tools, wires, etc., in these slots (OOM 223 only). Check that all connections have been properly made before powering up the system! Damaged equipment that may be dangerous must not be operated and should be clearly identified as being defective. Any troubleshooting of the measuring system is to be performed exclusively by authorized, trained personnel. If faults cannot be remedied, the instrument must be removed from service and secured to prevent accidental start-up. Repairs not described in these operating instructions may only be performed at the manufacturer s works. 4

7 OOM 223 Safety OOM223E02.CHP 2.4 Monitoring and safety features Safety features The transmitter is protected against external influences and damage by the following design measures: Monitoring features In the event of a system error or power failure, an alarm condition is signalled via a faultsignalling contact. Rugged housing UV resistance 2.5 Immunity to interference This instrument has been tested according to the applicable European standards for industrial applications with regard to electromagnetic compatibility. It is carefully protected against electromagnetic interference by design measures. Warning: The specified immunity to interference only applies for devices connected as outlined in these operating instructions. 2.6 Declaration of conformity The transmitteroom 223 has been developed and manufactured in accordance with currently valid European standards and directives. 5

8 Installation OOM Installation The following procedure should be followed for a complete measuring system installation: Installation or attachment of transmitter (see chpt ) Connection of cable and sensor (see chpt. 8) Installation is followed by start-up (see chpt. 5). 3.1 Measuring system The complete measuring system comprises: The OOM 223 transmitter An oxygen sensor OOS 4 or OOS 4HD with an integrated NTC temperature sensor An immersion, flow or retractable assembly Options: Extension cable OMK Junction box VBM Universal suspension assembly holder OYH 101 OOM 253 CAL E REL REL1 ALARM REL2 REL1 REL2 Immersion assy. OYA 611 Oxygen sensor OOS 4 Retractable assembly OOA 461 OOM 223 Fig. 3.1 Complete measuring systems consisting of OOM 223 with measuring cable, assembly and oxygen sensor CAL E REL REL1 ALARM REL2 REL1 REL2 OM2X3SYS.CDR 6

9 OOM 223 Installation OOM223E03.CHP 3.2 Dimensions EINBAU1.CDR 139 EINBAU2.CDR Fig. 3.2 OOM 223, panel-mounted version Panel-mounted instrument The instrument is attached using the supplied tensioning screws (see Fig. 3.3). The required overall installation depth is approx. 165 mm approx max MONT9.CDR Fig. 3.3 Attachment of panel-mounted instrument 1 Wall of control cabinet 2 Gasket 3 Tensioning screws 7

10 Installation OOM Electrical connection Connection diagram The connection diagram depicted in Fig. 3.4 shows the instrument connections for an oxygen sensor. The sensor connection is shown in more detail in Fig. 3.Fig and 3.7. Note: The instrument has protection class II and is generally operated without protective earth connection. Sensor OOS 4 / OOS 4HD NTC br rd S Alarm (de-energised contact position) K A gn K A O Relay 1 (de-energised contact position) Signal output 1 oxygen ma O Relay 2 (de-energised contact position) Signal output 2 temperature Digital input 1 (hold) Digital input 2 (Chemoclean) V V ma * * Relay 3 (de-energised contact position); w. Chemoclean: Water Relay 4 (de-energised contact position); w. Chemoclean: Cleaner Aux. voltage output V = L L+ N L- Mains Fig. 3.4 Electrical connection of transmitter OOM 223 (all inputs and outputs connected) * optional ANO201E.CDR 8

11 OOM 223 Installation OOM223E03.CHP Connections of panel-mounted instrument B B O 2 Sensor NC 12 rt REL1 COM Temp. (opt.) A br gn REL NC 90 K COM V 10mA NC NC REL S Digital COM Digital REL4 COM NC NC Mains Hilfsenergie NC NC O2-AN03.CDR Fig. 3.5 Connection compartment stickers for panel-mounted instrument OOM 223 9

12 Installation OOM Sensor installation and measuring cable connection Measuring cable connection The oxygen sensor is connected via a special screened, multi-core cable which is completely terminated and permanently connected to the sensor. Use junction box VBM and extension cable CMK (see chpt. 8) to extend the measuring cable. Special measuring cable required for oxygen sensor connection Sensor type Sensor cable Extension OOS 4 / OOS 4HD OMK VBM box + OMK OOS 4 / OOS 4HD Maximum cable length 50 m with OMK Structure and termination of sensor cable Assignments Outer screen red Active inner screen NTC temperature sensor green brown K A Cathode Anode NTC temperature sensor Fig. 3.6 Structure of special measuring cable OMK COS4KABL.CDR 10

13 OOM 223 Installation OOM223E03.CHP Connection example O 2 S bn rd K A gn OMK cable NTC K A SENSAN.CDR Fig. 3.7 Connection of sensor OOS 4 / OOS 4HD 11

14 Operation OOM Operation 4.1 Operator interface Liquid crystal display for display of measured values and configuration data 185 mg/l R232 Display of active contact and key for relay switching in manual mode Setpoint Field for user labelling LED indicator for alarm function Fig. 4.1 Operating elements of OOM main control keys for calibration and instrument configuration Key for switching between automatic / manual operation LED indicators for limit contactor relays (switching state) DISPL1-E.CDR 4.2 Display LED indicators Indication of current operating mode: auto (green LED) or manual (yellow LED) Indication for relay controlled in manual mode (red LED) Indicates the state of relays 1 and 2. LED green: measured value is within permissible limits, relay is inactive. LED red: measured value is outside permissible limits, relay is active. Alarm indication for continuous limit violation, temperature sensor failure or system errors (see error list in chpt. 6) Liquid crystal display Measuring mode indicator (normal operation) Calibration mode indicator Setup mode indicator (configuration) Hold mode indicator (outputs reflect last current status) On instruments with communication: indication for reception of a message. Permanently visible in burst mode (with HART) Fig. 4.2 Liquid crystal display Sensor symbol flashes during active calibration Error indicator 185 mg/l R232 Setpoint Rel 3/4 state indicators: inactive, active Function coding display In measuring mode: main meas. value. In setup / calibr. mode: e.g. parameter adjusted In measuring mode: secondary meas. value. In setup / calibr. mode: e.g. parameter setting DISPL3-E.CDR 12

15 OOM 223 Operation OOM223E04.CHP 4.3 Key functions CAL key AUTO key When the CAL key is pressed, the instrument prompts for the calibration access code (fixed setting: 22 for calibration; any other number to view the calibration data). Acknowledge with the CAL key to proceed. Use the CAL key to continue through the calibration process. This key is used to toggle between the automatic and manual modes of operation. Escape function Note: The calibration data set in function group C are used for calibration. ENTER key The ENTER key has several functions: Calling up the setup menu from the measuring mode Storage (acknowledgement) of data entered in the setup mode Starting calibration (same function as CAL key) Switching to the next function within the function groups. Press the PLUS and MINUS keys simultaneously to return to the main menu (in calibration mode: at the end of calibration). Press the PLUS and MINUS keys simultaneously again to return to the measuring mode. Locking the hardware PLUS key MINUS key The PLUS and MINUS keys have the following functions: Selection of function groups Setting parameters and numeric values (the setting speed increases when the key is held down) Relay operation in manual mode (s. chpt. 4.4). In the measuring mode, the functions of the PLUS and MINUS keys are (s. chpt. 4.7): Temperature display in F (PLUS) Suppression of temperature display (PLUS) Display of sensor current in na (PLUS) Selection of error display (MINUS). REL key Press the PLUS and ENTER keys simultaneously to lock the instrument. The code prompt displays the code Unlocking the hardware To unlock, press the CAL and MINUS keys simultaneously. The code prompt displays the code 0. The REL key is used in manual mode to switch between the relays and the manual start cleaning function. 13

16 Operation OOM Auto / manual mode of operation Auto mode In this mode of operation, the relays are controlled by the transmitter. Manual mode In this mode all relays can be controlled manually. Switching to manual mode The instrument is switched to the manual mode by pressing the following keys: 1. Press AUTO key. Note: Enable the manual mode by entering access code 22. The operating mode remains in effect even after a power failure. The manual mode takes precedence over any other automatic function (hold). Hardware locking in the manual mode is not possible. The manual settings remain in effect until they are actively reset. Error code E102 is signalled in the manual mode. 2. Enter code Select relay or function. Press REL key to toggle between the relays. The display shows the selected relay in the second line. 4. Set the relays. Switch on with PLUS, switch off with MINUS. The relay state remains in effect until it is actively reset. 5. Press AUTO key for returning to the measuring mode. 14

17 OOM 223 Operation OOM223E04.CHP 4.5 Operating concept Operating modes Measuring mode: Standard operating state, indicates current measured values Calibration mode: Run through calibration routine Setup mode: Access to all configuration settings Code Code input: Use Code 22 to change settings in function groups. For all other codes, you can only read settings but not change them. Code 22 is also required for calibration. Select function groups with PLUS or MINUS key. SETMOD-E.CDR Fig. 4.3 Description of operating modes Note: The user can put the functions and contacts on hold during calibration and configuration (see chpt. 5.6, function S2); the duration of the hold period may also be changed. If you do not press a key in setup mode for approx. 15 min, then the LCD returns automatically to measuring mode. An active hold function (hold at setup) is then reset. 15

18 Operation OOM 223 Menu structure The configuration and calibration functions are arranged in a menu structure by function groups. The function groups are selected in the setup mode with the PLUS and MINUS keys. The ENTER key is used to move from one function to the next within a function group. The PLUS and MINUS keys are used for option selection and editing. Selections must be confirmed by pressing the ENTER key. This also moves the cursor to the next function. Pressing the PLUS and MINUS keys at the same time terminates programming (return to main menu). Note: If a change is made but not confirmed by pressing the ENTER key, the previous setting is retained. See the appendix of these operating instructions for an overview of the Liquisys S menu structure. Functions (parameter selection, value entry) - Function groups Move forward and backward with the PLUS and MINUS keys Fig. 4.4 Schematic representation of OOM 223 menu structure Move from one function to the next with the ENTER key E E E E BEDSCHE.CDR 16

19 OOM 223 Operation OOM223E04.CHP Hold function: freezes the outputs The current output is frozen in the setup mode and during calibration, i.e. the last current value is constantly output. The display shows the HOLD message (see chpt. 5.6 for hold settings). Note: During hold, all contacts will go to their normal positions. An active hold has priority over all other functions. During each hold the I component of the controller is set to zero. Any alarm delay accumulated will be set to zero. The hold function can also be activated externally via the hold input (see connection diagram in Fig. 3.4; digital input 1). The manual hold (field S3) remains active even after a power failure. 4.6 Access codes The instrument access code is fixed, i.e. it cannot be modified. The following access codes are distinguished (cf. Fig. 4.4): Any code: Read mode access, i.e. all settings can be viewed but not modified (access with ENTER/CAL key, see Fig. 4.4). Code 22: Access to calibration and offset menus (access with CAL key, see Fig. 4.4). Code 22: Access to configuration menus for instrument configuration and user settings (access with ENTER key, see Fig. 4.4). See chpt. 4.3 for hardware locking and unlocking. 4.7 Display during measurement The measurement display has several possibilities of indication. Settings accessed with PLUS key: Press the PLUS key to display the temperature in F instead of C. Press the PLUS key a second time to suppress the temperature display. Press the PLUS key a third time to display the sensor current in na. Press the PLUS key a fourth time to return to the standard display. Settings accessed with MINUS key: Press the MINUS key to display the first error message. Press the MINUS key repeatedly to display the following error messages (up to ten). If no further errors exist, the display returns to the measuring mode. Note: Function group F (alarm, see chpt ) can be used to define the alarm functions for each individual error code. 4.8 Calibration Please refer to chpt. 5.8 for the calibration procedure. 17

20 Instrument configuration OOM Instrument configuration After power-up (connection to power), the instrument performs a self-test and then enters the measuring mode. Now it can be configured and calibrated for the first time. The following function groups are available on the Liquisys S (the groups that are only available on the Plus package are marked accordingly in the function descriptions): Setup mode SETUP 1 (A) see chpt SETUP 2 (B) see chpt CURRENT OUTPUT (O) see chpt. 5.3 ALARM (F) see chpt CHECK (P) see chpt RELAY (R) see chpt. 5.5 SERVICE I see chpt. 5.6 SERVICE II see chpt. 5.7 Calibration mode CALIBRATION (C) see chpt s F3 Function coding: The displayed code indicates the function position in the function group. Fig. 5.1 Example of display in the setup mode Err.Delay Additional information DISPL4-E.CDR A121 A A1 A111 A131 A132 A133 Selecting and locating functions is facilitated by a code displayed for each function in a special display field. The structure of this coding is shown in Fig The first column indicates the function group as a letter (see group designations). The functions in each of the groups increment in each column and row. Fig. 5.2 Function coding MATRIX.CDR Factory settings When the instrument is switched on for the first time, the factory settings are in effect. The following table provides an overview of all major settings. Please refer to the description of the individual functions in chpt. 5 for all other factory settings (the factory settings are printed in bold face there). Type of measurement oxygen concentration, temperature* in C or F Temperature offset 0.0 C Limit mg/l Contact function of limit contactor 1 Limit 2 Contact function of limit contactor 2 min contact without delay (switches when limit 1 is exceeded) mg/l max contact without delay (switches when limit 2 is exceeded) 18

21 OOM 223 Instrument configuration OOM223E5A.CHP Current outputs 1 and 2* Current output 1: meas. value for 4 ma signal current Current output 1: meas. value for 20 ma signal current Current output 2*: temperature value for 4 ma signal current Current output 2*: temperature value for 20 ma signal current Altitude Salinity ma 0.00 mg/l mg/l 10.0 C 60.0 C 0 m above sea level 0.0 % salt concentration * If equipped accordingly Alarm contact Normal operating state Alarm state RELAIS2.CDR Fig. 5.3 Recommended fail-safe circuit for an alarm contact Normal operating state: Instrument in operation No error message present (alarm LED green) Relay energised Contact 42/43 closed Alarm state: Error message present (alarm LED red) or Instrument defective or dead (alarm LED off) Relay de-energised Contact 41/42 closed 19

22 Instrument configuration OOM Start-up After power-up (connection to power supply established), the user must make the following selections in the specified function groups: Function group SERVICE (S) S1: Select language and exit function group. Function group SETUP 1 (A) Adjust all the parameters in this group; see chpt Function group SETUP 2 (B) Adjust all the parameters in this group; see chpt Other configuration options are explained in the chapters to follow for each menu. 5.2 System configuration The system is configured using the function groups SETUP 1 and SETUP 2. The measurement type and electrode are selected here, and the settings for temperature measurement are made. All the parameters in these two function groups are to be configured to avoid measuring errors or failure to measure at all Setup 1 Coding Field Selection or range Factory setting Display Info A Function group SETUP 1 SETUP 1 A Initial display in function group SETUP 1. A1 Selection of operating mode mg/l %SAT mg/l A1 Unit A2 Switch automatic pressure compensation on or off off on off A2 PressComp Plus package only. Factory settings are printed in bold face; base version does not include functions in italics. 20

23 OOM 223 Instrument configuration OOM223E5A.CHP Coding Field Selection or range Factory setting Display Info A3 Enter altitude 0m m m 0 A3 Altitude Only exists if pressure compensation in A2 has been switched off. A4 Enter measured value damping Damping 1 A4 Measured value damping causes averaging over the specified number of individual measured values. It is used, for example, to stabilise the display with applications that fluctuate a great deal. There is no damping if 1 is entered Setup 2 Coding Field Selection or range Factory setting Display Info B Function group SETUP 2 SETUP 2 B Initial display in function group SETUP 2. B1 Salinity 0.0 % % % 0.0 B1 Salinity B2 Enter correct process temperature current meas. value C C 0.0 B2 RealTemp The display value can be edited. B3 Enter temperature difference (offset) current offset C C 0.0 B3 Temp.Offs The offset is the difference between the temperatures measured and entered. Factory settings are printed in bold face; base version does not include functions in italics. 21

24 Instrument configuration OOM Current outputs The function group CURRENT OUTPUT is used to configure the individual outputs. Either a linear (O2 (1)) or, in conjunction with the Plus package, a user-defined current output characteristic (O2 (3)) can be entered. Furthermore, a current output value can be simulated to check the current outputs (O2 (2)). Coding Field Selection or range Factory setting Display Info O Function group CURRENT OUTPUT OUTPUT O Initial display in function group CURRENT OUTPUT. O1 Selection of current output Out1 Out2 Out1 Sel.Out O1 A different characteristic can be selected for each output. O2 (1) Enter linear characteristic lin = linear (1) sim = simulation (2) table (3) lin O2 Sel.Type The slope of the characteristic may be positive or negative. See O2 (2), O2 (3) for the simulation and table characteristics. O211 Selection of current range O211 Sel.Range O212 0/4 ma value; enter corresponding O 2 or temperature value 0.00 mg/l mg/l 0.0 %SAT %SAT 0.0 C C 0.00 mg/l O212 0/4 ma Enter the O 2 or temperature value corresponding to the minimum current value (0/4 ma) at the transmitter output. O ma value; enter corresponding O 2 or temperature value mg/l mg/l %SAT %SAT 40.0 C C mg/l O ma Enter the O 2 or temperature value corresponding to the maximum current value (20 ma) at the transmitter output. Factory settings are printed in bold face; base version does not include functions in italics. 22

25 OOM 223 Instrument configuration OOM223E5A.CHP Coding Field Selection or range Factory setting Display Info O2 (2) Current output simulation lin = linear (1) sim = simulation (2) table (3) sim O2 Sel.Type The simulation is terminated by selecting (1) or (3). See O2 (1), O2 (3) for other characteristics. O221 Simulation value current value ma 4.00 ma Simulat. O221 The current value entered here is output through the current output. O2 (3) Current output table (Plus package only) lin = linear (1) sim = simulation (2) table (3) table O2 Sel.Type Values may also be added or changed at a later point in time. The values entered are automatically sorted in ascending order by current value. O231 Selection of table option read edit read Sel.Table O231 O232 Enter number of value pairs No.Elem. O232 Enter the number of x and y value pairs (measured value and associated current value). O233 Selection of table value pair number of table value pairs asign 1 O233 Sel.Elem. The functional chain O O235 is automatically passed as often as set in O232. asign is displayed as the last step. After confirmation, the display jumps to O236. O234 x value 0.00 mg/l mg/l 0.0 %SAT %SAT 0.00 µs/cm O234 Meas.val. x value = measured value determined by user (O 2 value). O235 y value 4.00 ma ma ma 4.00 ma O235 value y value = current determined by user to be associated with O234. Return to O2. O236 Enter whether or not the table status is okay yes no yes O236 Status ok If no, then set table correctly (all previous settings are retained) or back to measuring mode (then the table is invalid). Factory settings are printed in bold face; base version does not include functions in italics. 23

26 Instrument configuration OOM Monitoring functions The monitoring functions are used to define various alarms and to set output contacts. Each individual error can defined to be effective or not (at the contact or as an error current). An alarm condition can be defined to activate a cleaning function (F8) Alarm Coding Field Selection or range Factory setting Display Info F Function group ALARM ALARM F Alarm function settings. F1 Selection of contact type Stead = steady contact Fleet = fleeting contact Stead F1 Cont.Type The contact type selected here only applies to the alarm contact. F2 Selection of time unit min s min F2 Time Unit F3 Enter alarm delay 0 min (s) min (s) 0 s F3 Err.Delay Depending on the unit selected in F2, the alarm delay is entered in min or s. F4 Selection of error current 22 ma 2.4 ma 22mA F4 Err.Curr This selection must be made even if all errors are suppressed in F5. If 0 20 ma was selected in O211, then 2.4 ma must not be used. F5 Selection of error F5 Sel.Error This is where the errors are selected that are to trigger an alarm signal. The errors are selected via the error number. Please refer to the table in chpt. 6.4 for the error numbers. The factory settings remain in effect for all errors not edited. Factory settings are printed in bold face; base version does not include functions in italics. 24

27 OOM 223 Instrument configuration OOM223E5A.CHP Coding Field Selection or range Factory setting Display Info F6 Set alarm contact to be effective for selected error yes (up to E070, see chpt. 6.4) no yes F6 Rel.Assg If set to no, all the other alarm settings (e.g. alarm delay) are also deactivated. The settings themselves are retained. This setting only applies to the error selected in F5. F7 Set error current to be effective for selected error no yes no F7 Curr.Assg The error current selected in F4 becomes effective or is suppressed in case of error. This setting only applies to the error selected in F5. F8 Automatic start of cleaning function? no yes no F8 CleanTrig This field does not exist for some errors; see chpt F9 Select next error or return to menu next = next error < -R next Select F9 If next is selected, the display returns to F5. If < -R is selected, the display returns to F. Factory settings are printed in bold face; base version does not include functions in italics. 25

28 Instrument configuration OOM Check This function group is used to select and set the monitoring functions. Note: All monitoring functions are disabled when the factory settings are in effect. The Sensor Check System is adapted to the conditions at hand by enabling and adjusting appropriate functions. Alarm threshold monitoring In oxygen measurement without oxygen transfer control (aeration), sensor errors result in incorrect measurement but this does not have any effect on the process medium (examples: measurement in surface waters or in water works for monitoring purposes). Sensor errors usually result in implausibly high or low measured values. Such implausible values can be detected and signalled by means of a user-defined alarm threshold. Controller monitoring In oxygen measurement with oxygen transfer control, sensor errors not only result in incorrect measurement but also directly influence the process medium. Particularly in the case of oxygen transfer control in sewage treatment plants, there is a risk that the aeration will not be reactivated at all if the measured value is permanently too high due to the control loop. Inadequate oxygen transfer poses a considerable danger to the microbiology and its clarification performance. Conversely, measured values that are permanently too low can cause higher operating expenses because the aeration equipment works continuously. These cases are detected and signalled by means of user-selectable monitoring times for maximum permissible controller ON or OFF times. Sensor activity monitoring The process medium may also affect the sensor, and this in turn may result in incorrect measurement. Braid formation on the sensor from solids floating in the medium or coatings on the sensor membrane result in a very sluggish or totally passivated measuring signal. Passivation can be detected and signalled by means of permanent signal activity monitoring. Overview of SCS monitoring functions Alarm threshold monitoring Controller monitoring (PCS: Controller Check) Sensor activity monitoring (PCS: Alternation Check) Function Settings Alarm event Application User-selectable lower alarm threshold (AT) User-selectable upper alarm threshold (AT) ON period monitoring OFF period monitoring Monitoring for signal change Off Lower AT only Upper AT only Upper and lower AT Off On Off On Lower AT reached or fallen below Upper AT reached or exceeded Lower A: reached or fallen below or upper AT reached or exceeded Maximum setting for permanent ON or OFF period exceeded Change within 1 hour < ±0.1 mg/l or ±1%SAT Applications with or without oxygen transfer control Applications with oxygen transfer control Applications with or without oxygen transfer control Troubleshooting Refer to chpt. 6.3 and 6.4 for further information on troubleshooting when sensor or process alarms have been detected. 26

29 OOM 223 Instrument configuration OOM223E5A.CHP Coding Field Selection or range Factory setting Display Info P Function group CHECK (Plus package only) CHECK P Settings for sensor and process monitoring. P1 Selection of alarm threshold monitoring off Low High Lo+Hi = lower and upper off A.Thresh P1 P2 Alarm delay 0 min (s) min (s) min 0 P2 Err.Delay Depending on the unit selected in F2, the alarm delay is entered in min or s. This alarm delay is valid if P5 = AC or AC+CC. P3 Lower alarm threshold 0.00 mg/l mg/l 0.0 %SAT %SAT 0.00 P3 LowAlarm mg/l Omitted if P1 = off. P4 Upper alarm threshold mg/l mg/l %SAT %SAT P4 HighAlarm mg/l Omitted if P1 = off. P5 Selection of process monitoring off AC CC AC+CC off P5 ProcMonit mg/l AC = sensor activity monitoring CC = controller monitoring Monitoring limits for AC: ±0.1 mg/l bzw. ±1 %SAT in 1 h P6 Maximum permissible duration for limit violation (lower limit) 480 min min 480 P6 Tmax Low min Only if P5 = CC. P7 Maximum permissible duration for limit violation (upper limit) 240 min min 240 P7 min Tmax High Only if P5 = CC. P8 Limit 5.00 mg/l mg/l 50.0 %SAT %SAT 5.00 P8 Setpoint mg/l Factory settings are printed in bold face. 27

30 Instrument configuration OOM Relay contact configuration The relay contacts described below can be selected and configured as required (up to four times with four contacts depending on options installed). Limit contactor for measured oxygen value: R2 (1) Limit contactor for temperature: R2 (2) P(ID) controller: R2 (3) Timer for cleaning function: R2 (4) Limit contactor for measured oxygen value and temperature The relay contacts in the transmitter OOM 223 can be assigned different functions. Switch-on and switch-off points and pickup and dropout delays can be defined for the limit contactor. Moreover, an alarm threshold can be set to issue an error message and to start a cleaning function. These functions may be used for oxygen and temperature measurement. Please refer to Fig. 5.4 for a graphic representation of the contact states of any relay or alarm contact. When the measured value increases (max function), the relay contact is closed at time t 2 when the switch-on point (t 1) has been exceeded and the pickup delay (t 2 t 1 )has expired. When the alarm threshold (t 3 )is reached and the alarm delay (t 4 t 3 ) also has expired, the alarm contact is switched. When the measured value decreases, the alarm contact is reopened when the measured value drops below the alarm threshold (t 5), and the relay contact also opens (t 7, after the dropout delay t 7 t 6). When the pickup and dropout delays are set to 0 s, the switch-on and switch-off points are identical to the contact switching points. Settings analogous to the max function can also be made for a min function. Switch-on point > switch-off point: Maximum function Meas. value Alarm ON Alarm OFF Alarm threshold Contact ON Switch-on point Switch-off point Contact OFF t 1 t 2 t 3 t 4 t 5 t 6 t 7 t Switch-on point < switch-off point : Minimum function Fig. 5.4 Relationships between switch-on and switch-off points and pickup and dropout delays Switch-off point Switch-on point Alarm threshold t 1 Contact ON t 2 t 3 Alarm OFF Alarm ON t 4 t 5 t 6 t 7 Contact OFF t GRENZ-E.CDR P(ID) controller The transmitter OOM 223 supports the definition of various controller functions. On the basis of the PID controller, P, PI, PD and PID controllers can be implemented. The best control response is obtained using the controller best suited to the application in question: 28

31 OOM 223 Instrument configuration OOM223E5B.CHP P controller: Used for simple linear control purposes with small system deviations. Where major changes are to be controlled, overshooting may occur. A control offset is to be expected. PI controller: Used for processes where overshooting is to be avoided and permanent offsets are not allowed. PD controller: Used for processes that require quick response and where peaks are to be corrected. PID controller: Used for processes for which the type of control provided by a P, PI or PD controller is inadequate. Adjustments of P(ID) controller Three parameters can be adjusted in the case of a PID controller: control gain K p (P influence) integral action time T n (I influence) derivative action time T v (D influence) Step response of process y = set value y h = control range T u = delay time [s] T g = recovery time [s] V max = = X x = Tg t max. slew rate of control variable [K/s] X max = maximum process value X h = controller adjustment range 100 % On 0% Off X max [%] [ C] X h y y h t x t Controller characteristics T u T g K = V max T X h u REGEL01.CDR Fig. 5.5 Control characteristic L N M 1 y = Kp e + ei + Tv e e T n i I comp. e D comp. 1 j O Q P, Start-up If there is no previous experience for the control parameter settings, values should be used which guarantee maximum control loop stability (see table). e = set point actual value, MAX MIN where set point = set point from R232, MAX, MIN = upper and lower range values. Recommendable settings for all types For optimisation, the control gain K p is reduced until the control variable overshoots slightly. Then K p is increased somewhat, and the T n setting is reduced (shorter times) to obtain the shortest possible correction time without overshooting. T v must also be adjusted in the case of fast correction times. Contr. response K p T v [s] T n [s] P 1 K 0* 0* PI 2.6 K 0* 6 T u PD 0.5 K T u 0* PID 1.7 K 2 T u 2T u *T v = 0: component is not calculated T n = 0: component is not calculated 29

32 Instrument configuration OOM 223 Checking and fine tuning of parameter settings using a recorder Actual value Actual value T n too small T n too large Time Time Actual value Actual value K p too large K p too small Time Time Actual value Optimal setting Fig. 5.6 Optimisation of settings for T n and K p Time REGEL02.CDR Actuating signal outputs (R R2310) The control contact in question outputs a switched signal. The intensity of this signal is proportional to the controller s control output. Pulse-length controller The greater the calculated control output, the longer the contact in question remains picked up. The period can be adjusted between 0.5 and 99 s. Pulse-length outputs are used to control solenoid valves. Pulse-frequency controller The greater the calculated control output, the higher the switching frequency of the contact. The maximum switching frequency 1/T can be adjusted between 60 and 180 min 1. The ON period t ON is constant. Pulse-frequency outputs are used to control solenoid-operated metering pumps. Contact t ON t ON = 0.5 T max,user Contact IMPULS.CDR On t OFF On t ON Fig. 5.7 Signal of a pulse-length (left) and a pulsefrequency control contact (right) Off Period T Time [s] Off T1 T2 Time [s] 30

33 OOM 223 Instrument configuration OOM223E5B.CHP Control characteristic for direct and inverted control action Field R236 offers two control characteristics for selection which have the effects shown in the following diagram. 100 % Y Direct = max function Xw Inverted = min function 100 % Y Xw REGEL03.CDR Fig. 5.8 Control characteristic of a proportional controller with direct and inverted control action Timer for cleaning function This function can be used to implement a simple cleaning routine. The user can specify a time interval after which cleaning is to start; i.e. only constant intervals can be defined. Wiper and / or spray cleaning system active Cleaning time ( s) Pause time between 2 cleaning intervals ( min) inactive Hold function active Clean hold delay time ( s) inactive Time DIAGR-TI.CDR Fig. 5.9 Relationships among cleaning time, pause time and hold delay time Note: Timer and Chemoclean do not work independently of each other. While one of the two functions is active, the other cannot be started. 31

34 Instrument configuration OOM 223 Coding Field Selection or range Factory setting Display Info R Function group RELAY RELAY R Relay contacts can be selected and adjusted. R1 Selection of contact to be configured Rel1 Rel2 Rel3 Rel4 Rel1 R1 Sel.Relay Rel3 and Rel4 are only available on instrument equipped accordingly. R2 (1) Configuration of limit contactor for O 2 LC PV = limitcontactoro 2 (1) LC C = limit contactor T (2) PID controller (3) Timer (4) LC Sel. PV R2 Type PV = process value R211 Switch function of R2 (1) off or on Off On Off R211 Function All settings are retained. R212 Enter switch-on point of contact mg/l mg/l %SAT %SAT On mg/l R212 value Never set switch-on point and switch-off point to the same value! (The unit selected in A1 appears.) R213 Enter switch-off point of contact mg/l mg/l %SAT %SAT Off mg/l R213 value The switch-off point entry selects a max contact (switch-off point < switch-on point) or a min contact (switch-off point > switch-on point), thereby implementing an always required hysteresis function (see Fig. 5.4). R214 Enter pickup delay 0s s On 0 s R214 Delay R215 Enter dropout delay 0s s Off 0 s R215 Delay Factory settings are printed in bold face; base version does not include functions in italics. 32

35 OOM 223 Instrument configuration OOM223E5B.CHP Coding Field Selection or range Factory setting Display Info R216 Enter alarm threshold (as an absolute value) mg/l mg/l %SAT %SAT mg/l R216 A.Thresh When the alarm threshold is violated, the measuring transmitter issues an alarm with an error message and error current (note alarm delay). If you define a min contact, then you must set the alarm threshold to a less value than the switch-off point! R216 is not displayed on instruments equipped with Plus package. R2 (2) Configure limit contactor for temperature measurement LC PV = limit contactor O 2 (1) LC C = limit contactor T (2) PID controller (3) Timer (4) LC Sel. C R2 Type R221 Switch function of R2 (2) off or on Off On Off R221 Function R222 Enter switch-on temperature 60.0 C C On C R222 value Never set switch-on point and switch-off point to the same value! R223 Enter switch-off temperature 60.0 C C Off C R223 value The switch-off point entry selects a max contact (switch-off point < switch-on point) or a min contact (switch-off point > switch-on point), thereby implementing an always required hysteresis function (see Fig. 5.4). R224 Enter pickup delay 0s s On s 0 R224 Delay R225 Enter dropout delay 0s s Off s 0 R225 Delay Factory settings are printed in bold face; base version does not include functions in italics. 33

36 Instrument configuration OOM 223 Coding Field Selection or range Factory setting Display Info R226 Enter alarm threshold 60.0 C C 60.0 A.Thresh s R226 When the alarm threshold is violated, the transmitter issues an alarm with an error message and error current. If you define a min contact, then you must set the alarm threshold to a less value than the switch-off point! R2 (3) P(ID) controller configuration LC PV = limit contactor O 2 (1) LC C = limit contactor T (2) PID controller (3) Timer (4) Sel. PID R2 Type R231 Switch function of R2 (3) off or on Off On Off R231 Function R232 Enter set point 5.00 mg/l mg/l 50.0 %SAT %SAT 5.00 Setpoint mg/l R232 The set point is the value to be maintained by the control. This value is to be re-established by the control in the event of any deviation (up or down). R233 Enter control gain K p Kp 1.00 R233 See chpt R234 Enter integral action time T n (0.0 = no I comp.) 0.0 min min min 0.0 R234 Time Tn See chpt Each hold resets the I component to zero. Hold can be deactivated in S2, but not for timer! R235 Enter derivative action time T v (0.0=noDcomp.) 0.0 min min min 0.0 R235 Time Tv See chpt R236 Selection of controller characteristic inv = inverted dir = direct inv R236 Direction Setting may or may not be required depending on control deviation (up or down deviation, see chpt ). Factory settings are printed in bold face; base version does not include functions in italics. 34

37 OOM 223 Instrument configuration OOM223E5B.CHP Coding Field Selection or range Factory setting Display Info R237 Selection of pulse length or pulse frequency len = pulse length freq = pulse frequency len R237 Oper.Mode Pulse length e.g. for solenoid valve, pulse frequency e.g. for solenoid-operated metering pump (see chpt ). R238 Enter pulse interval 10.0 s s 10.0 R238 PulsePer. This field only appears if pulse length is selected in R237. When pulse frequency is selected, R238 is skipped and input continues in R239. R239 Enter maximum pulse frequency of actuator 120 min min 1 1/min 120 R239 Max.PFreq This field only appears if pulse frequency is selected in R237. When pulse length is selected, R239 is skipped, and input continues in R2310. R2310 Minimum ON time t ON 0.3 s s s 0.3 R2310 Min.PTime This field only appears if pulse length is selected in R237. R2 (4) Configure cleaning function (timer) LC PV = limit contactor O 2 (1) LC C = limit contactor T (2) PID controller (3) Timer (4) Timer R2 Sel. Type Cleaning is performed using only one cleaning agent (usually water); see Fig R241 Switch function of R2 (4) off or on Off On Off R241 Function R242 Enter rinse / cleaning time 30 s s s 30 R242 RinseTime The hold and relay settings are activated for the period of time specified here. R243 Enter pause time 360 min min min 360 R243 PauseTime The pause time is the time between two cleaning cycles (see chpt ). R244 Enter minimum pause time 120 min min min 120 R244 Min.Pause The minimum pause time prevents continuous cleaning when the external cleaning trigger is present. Factory settings are printed in bold face; base version does not include functions in italics. 35

38 Instrument configuration OOM Service I Coding Field Selection or range Factory setting Display Info S Function group SERVICE I SERVICE S I S1 Selection of language ENG = English GER = German FRA = French ITA = Italian NEL = Dutch ESP = Spanish ENG S1 Language This field must be configured once during start-up. Then you can exit S1 and continue. S2 Hold configuration S+C = during setup + calibration CAL = during calibration Setup = during setup none = no hold S+C S2 Auto HOLD S = setup, C = calibration. S3 Manual hold Off On Man. Off S3 HOLD The setting remains active even after a power failure. S4 Enter hold delay time 10 s s s 10 S4 Cont.Time S5 SW upgrade: Enter release code for Plus package S5 PlusCode The code is on the nameplate (see Fig. 1.1 and 1.2). Entry of an incorrect code returns you to the measurement menu. The number is edited with the PLUS or MINUS key and confirmed with the ENTER key. S6 Spare field without function S7 Order number is displayed order S7 DX0005 The order code is not changed after an upgrade. The delivery state will be displayed. actory settings are printed in bold face; base version does not include functions in italics. 36