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LTH Electronics MPD73LV-UL Operating Manual
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LTH Electronics MPD73LV-UL Operating Manual

Low voltage ph / redox monitor
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MPD73LV-UL
Low Voltage pH / Redox Monitor
Operating Guide

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Summary of Contents for LTH Electronics MPD73LV-UL

  • Page 1 MPD73LV-UL Low Voltage pH / Redox Monitor Operating Guide...
  • Page 3 Disclaimer LTH Electronics Ltd reserves the right to make changes to this manual or the instrument without notice, as part of our policy of continued developments and improvements. All care has been taken to ensure accuracy of information contained in this manual.
  • Page 4 Disposal As per regulation S.I. 2012/3032 and directive 2012/19/EU, please observe the applicable local or national regulations concerning the disposal of waste electrical and electronic equipment. MPD73LV-UL pH / Redox Monitor - 2 - Operating Guide...
  • Page 5 Preface Declaration of Conformity MPD73LV-UL pH / Redox Monitor - 3 - Operating Guide...
  • Page 6 Preface MPD73LV-UL pH / Redox Monitor - 4 - Operating Guide...
  • Page 7 Preface UL Certificate of Compliance MPD73LV-UL pH / Redox Monitor - 5 - Operating Guide...
  • Page 8 Preface MPD73LV-UL pH / Redox Monitor - 6 - Operating Guide...
  • Page 9 Contents Contents Preface ......................... 1   Contents ........................7   Introduction ......................11   MPD73LV-UL Instrument Specification ............13   Installation – Safety & EMC ................16   Noise suppression ....................18   Installation – MPD73LV-UL ................19   MPD73LV-UL Connections ................20  ...
  • Page 10 Setpoint Cleaning Mode ................75   Current Output ..................... 78   Current Output Calibration ................ 81   Resetting the current Output user Calibration ........83   Digital Inputs ......................85   MPD73LV-UL pH / Redox Monitor - 8 - Operating Guide...
  • Page 11 Viewing the SD Card Data Log on a PC ..........108   Error Messages ....................109   Save, Restore & Reset ..................110   Appendix A - Temperature Data ..............112   Appendix C - Error Messages ................. 113   MPD73LV-UL pH / Redox Monitor - 9 - Operating Guide...
  • Page 12 Contents Fault Finding ......................118   Problems with Cables and Connectors ..........119   Guarantee and Service ..................120   Index ............... Error! Bookmark not defined.   MPD73LV-UL pH / Redox Monitor - 10 - Operating Guide...
  • Page 13 Introduction Introduction The MPD73LV-UL is a microprocessor-controlled pH / redox measurement instrument. Utilising a multifunction easy to read QVGA LCD the instrument displays readings and provides feedback to the operator on the status of the sensor and the instruments outputs.
  • Page 14 Introduction MPD73LV-UL Rear Termination Overview MPD73LV-UL pH / Redox Monitor - 12 - Operating Guide...
  • Page 15 (10sec – 5mins). Temperature Sensor Pt100, Pt1000, 3K Balco RTD input. Up to 100 meters of 3 wire cable. Temperature sensor can be mounted in the sensor or separately. MPD73LV-UL pH / Redox Monitor - 13 - Operating Guide...
  • Page 16 Both adjustable from 00:00 to 59:59 mm:ss. Adjustable cycle time and proportional band in proportional modes. Setpoint Cleaning Cleaning mode with adjustable duration (max 10m) and interval times (max 24h), auto offline function with recovery timer. MPD73LV-UL pH / Redox Monitor - 14 - Operating Guide...
  • Page 17 Weight Maximum 880 grams (instrument only). Dimensions Front 128 x 116 x 23 mm (H, W, D). Dimensions Rear 89 x 89 x 161 mm (H, W, D), including connectors. MPD73LV-UL pH / Redox Monitor - 15 - Operating Guide...
  • Page 18 CAUTION! LOCAL WIRING AND SAFETY REGULATIONS SHOULD BE STRICTLY ADHERED TO WHEN INSTALLING THIS UNIT. SHOULD THESE REGULATIONS CONFLICT WITH THE FOLLOWING INSTRUCTIONS, CONTACT LTH ELECTRONICS OR AN AUTHORISED LOCAL DISTRIBUTOR FOR ADVICE. IF THE PRODUCT IS NOT INSTALLED OR USED AS PER DETAILED IN THIS MANUAL THEN ELECTRICAL SAFETY PROTECTION GRANTED BY THIS PRODUCT MAY BE IMPARED.
  • Page 19 N.B. The use of CE marked equipment to build a system does not necessarily mean that the completed system will comply with the European requirements for EMC. MPD73LV-UL pH / Redox Monitor - 17 - Operating Guide...
  • Page 20 Fit an in-line mains filter close to the power terminals of the instrument.  In cases of very high background RF and HF noise environments, LTH can supply a length of proprietary RF suppressing mains cable. MPD73LV-UL pH / Redox Monitor - 18 - Operating Guide...
  • Page 21 Installation Installation – MPD73LV-UL The MPD73LV-UL is a panel mount instrument, designed to be flush mounted and sealed in a square cut-out panel, and is held in place with the four screw clamps provided. MPD73LV-UL Overall Dimensions Caution! Risk of losing the specified ingress protection rating if the following points are not followed: ...
  • Page 22 Connections MPD73LV-UL Connections Connections to the MPD73LV-UL panel mount instrument are made via the three plug and socket terminal blocks, accessible to the rear of the unit. MPD73LV-UL Connections The bottom connector houses the power input and the current and relay outputs. The top right connector houses the digital inputs and SD card slot.
  • Page 23 The supply should be fused to a maximum of 3 Amps. If the using the incoming supply daisy chain with the relays and the total required power is greater than 3 Amps, then a separate supply for the relays will be required. MPD73LV-UL pH / Redox Monitor - 21 - Operating Guide...
  • Page 24 Connections Current Output Connections The MPD73LV-UL is supplied with a single current output designated A, which can terminate into a load resistance not exceeding 750. For best noise immunity use a screened twisted pair cable, with the screen connected to Earth at one end. Use a sufficiently large cable to avoid a high resistance in the overall current loop.
  • Page 25 Connections Relay Connections The MPD73LV-UL is supplied with 2 relays designated 1 & 2 the relays operate as changeover relays. The relay contacts are connected to the terminals only and are electrically isolated from the instrument itself. Caution! Relays must be connected in series with a 5 Amp fuse.
  • Page 26 Connections Digital Inputs The MPD73LV-UL features 8 digital inputs, which can be used to initiate a user configurable instrument operation by use of a volt free link, switch or relay. The instrument can be configured to initiate the appropriate action when the contact either closes or opens.
  • Page 27 (see page 53). SensorTalk Interface The smart capable version of the MPD73LV-UL pH/Redox card is capable of interfacing with the full range of Broadley James All-Digital Smart pH and Hybrid pH sensors. The Plug-and-Play functionality of the of the SensorTalk sensors enables “calibrate here use there”.
  • Page 28 80°C, 3.8 Molar KCl solution for 30 minutes. Before allowing the electrode to cool in the same solution to promote flow of internal electrolyte through the liquid junction. MPD73LV-UL pH / Redox Monitor - 26 -...
  • Page 29 Connections Smart Capable Input Card Termination Information pH / Redox LN10 Coax Cable (No TC) Connection Details S400 ProcessProbe Cable (Solution Ground Not Fitted) Connection Details MPD73LV-UL pH / Redox Monitor - 27 - Operating Guide...
  • Page 30 Connections The Smart pH / Redox input card of the MPD73LV-UL Series also provides a differential input method of wiring the pH electrode. This provides better electrical noise immunity and allows the sensor to operate in solutions where flowing electrical currents may cause measurement problems.
  • Page 31 Connections VP6 Detachable Cable Connection Details with “Solution Ground” MPD73LV-UL pH / Redox Monitor - 29 - Operating Guide...
  • Page 32 SensorTalk sensor from the instrument please wait for the probe is removed message to appear before attaching a different sensor. Hybrid SensorTalk Probe Cable Connection Details (Solution Ground Fitted) Digital SensorTalk Probe Cable Connection Details MPD73LV-UL pH / Redox Monitor - 30 - Operating Guide...
  • Page 33 Connections Smart Capable Input Card LTH 54E Extension Cable Connection Information pH 54E Extension Cable Connection Details (Solution Ground Not Fitted) pH 54E Extension Cable Connection Details (Solution Ground Fitted) MPD73LV-UL pH / Redox Monitor - 31 - Operating Guide...
  • Page 34 Connections S400 ProcessProbe to 54E Extension Cable Connection Details VP6 Detachable Cable to 54E Extension Cable Connection Details MPD73LV-UL pH / Redox Monitor - 32 - Operating Guide...
  • Page 35 Connections Hybrid SensorTalk 54E Extension Cable Connection Details (Solution Ground Fitted) Hybrid SensorTalk Probe Cable To 54E Extension Cable Connection Details MPD73LV-UL pH / Redox Monitor - 33 - Operating Guide...
  • Page 36 Connections Smart Capable Input Card Temperature Sensor Connections 2 Wire RTD Temperature Connection 3 Wire RTD Temperature Connection 4 Wire RTD Temperature Connection MPD73LV-UL pH / Redox Monitor - 34 - Operating Guide...
  • Page 37 BEEN FOLLOWED CORRECTLY. FAILURE TO DO SO MAY RESULT IN IRREPARABLE DAMAGE TO THE INSTRUMENT. The MPD73LV-UL Series uses a high quality backlit 3¾” QVGA LCD to display the channel readings and settings. This is accompanied by 5 control buttons whose function varies depending upon which screen the user is viewing.
  • Page 38 20 seconds after this it will default to the front screen. The user interface is arranged in two ways, the first is a quick configuration overview which is accessible by scrolling left or right from the front screen as shown below. Scrolling Menu Layout MPD73LV-UL pH / Redox Monitor - 36 - Operating Guide...
  • Page 39 Note when looking at a list of options an arrow in the top right or bottom right corner of the pop-up indicates further options above or below the ones currently shown. MPD73LV-UL pH / Redox Monitor - 37 -...
  • Page 40 If the code is correct the padlock at the top of the screen will turn to a key and the unit will be unlocked / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Enter Code MPD73LV-UL pH / Redox Monitor - 38 - Operating Guide...
  • Page 41 The user is required to enter the existing security code before the new code can be entered. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Enter Code MPD73LV-UL pH / Redox Monitor - 39 - Operating Guide...
  • Page 42 Confirm the change of the security access code. EXIT – Cancel – Confirm Change Change Confirmation The instrument will then confirm that the security code has been successfully changed. – Exit MPD73LV-UL pH / Redox Monitor - 40 - Operating Guide...
  • Page 43 Selecting no disables the channel and prevents it from appearing as an option in output and configuration menus, also disables any error messages associated with the channel. / – Select Option EXIT – Cancel – Save Selection MPD73LV-UL pH / Redox Monitor - 41 - Operating Guide...
  • Page 44 Only available when a SensorTalk capable probe is connected to the instrument. / – Select Option – Return to Channel Setup Menu EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 42 - Operating Guide...
  • Page 45 Note. When disabled is set a manual temperature compensation value must be set. / – Select Option EXIT – Cancel – Save Selection MPD73LV-UL pH / Redox Monitor - 43 - Operating Guide...
  • Page 46 Simulated Input See Simulated Channels section of the Setpoints, Current Outputs, Digital Inputs Configuration Guide for more information. / – Select Option – Return to Main Menu EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 44 - Operating Guide...
  • Page 47 (from 10 seconds to 5 minutes). / – Select Option EXIT – Cancel – Save Selection MPD73LV-UL pH / Redox Monitor - 45 - Operating Guide...
  • Page 48 Buffer solutions should be prepared in accordance with the instructions supplied with them. The MPD73LV-UL offers two different but simple methods of calibration for pH electrode systems. Auto In Auto calibration the instrument requires that the electrode is first placed in a 4pH buffer and then secondly in a 9pH buffer.
  • Page 49 For calibration and test purposes, standard solutions at various potentials can be purchased from LTH Electronics: Part No. 138/175 124mV Redox Solution (500ml) Part No. 138/176 358mV Redox Solution (500ml) MPD73LV-UL pH / Redox Monitor - 47 - Operating Guide...
  • Page 50 If a “Cannot Edit Digital Input Has Control” message appears, then an associated digital input is currently controlling the on-line / off-line state of the channel. / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 48 - Operating Guide...
  • Page 51 See page 56 for more details. / – Select Option – Return to Select Calibration Channel EXIT – Enter pH Auto Calibration MPD73LV-UL pH / Redox Monitor - 49 - Operating Guide...
  • Page 52 Manual in this menu. See page 58 for more details. / – Select Option – Return to Select Calibration Channel EXIT – Enter pH Manual Offset Calibration MPD73LV-UL pH / Redox Monitor - 50 - Operating Guide...
  • Page 53 EXIT – Save Calibration Temperature Offset Value The temperature offset value currently being used. The value will change depending on the result of the temperature offset calibration. Cannot be edited MPD73LV-UL pH / Redox Monitor - 51 - Operating Guide...
  • Page 54 – Return To Calibration Menu – Clear All of the Calibration History CLEAR Sensor Condition The MPD73LV-UL is capable of analysing the result of the pH electrode offset and slope calibration and indicates to the user the condition the electrode is in. ...
  • Page 55 / – Select Option EXIT – Cancel – Save Selection MPD73LV-UL pH / Redox Monitor - 53 - Operating Guide...
  • Page 56 Enters the custom buffer setup menu. Only available when the pH calibration principle is set to auto. / – Select Option – Return to Select Calibration Channel EXIT – Enter pH Manual Slope Calibration MPD73LV-UL pH / Redox Monitor - 54 - Operating Guide...
  • Page 57 Reset Custom Buffer – Reset the points back to the LTH standard buffer defaults. / – Select option or Increase / Decrease Digit  – Select Next Digit – Cancel or Return to Calibration Menu EXIT – Save Entry MPD73LV-UL pH / Redox Monitor - 55 - Operating Guide...
  • Page 58 To start the pH calibration, select the “pH Calibration” item from the desired channel’s calibration menu. / – Select Option – Return to Select Calibration Channel EXIT – Enter pH Auto Calibration MPD73LV-UL pH / Redox Monitor - 56 - Operating Guide...
  • Page 59 Lower down in the calibration menu the instrument will also display the sensor condition calculated from the span and offset values. See page 52 for more information. MPD73LV-UL pH / Redox Monitor - 57 - Operating Guide...
  • Page 60 Note. If the electrode is new, pressing the “new” button will reset the existing offset. / – Adjust the Reading Up or Down – Register New Electrode EXIT – Cancel – Progress to Slope Calibration MPD73LV-UL pH / Redox Monitor - 58 - Operating Guide...
  • Page 61 – Adjust the Reading Up or Down – Cancel EXIT – Save Calibration Result The adjusted offset and slope values, as well as the calculated sensor condition from the calibration routine is displayed here. MPD73LV-UL pH / Redox Monitor - 59 - Operating Guide...
  • Page 62 – Adjust the Reading Up or Down – Register New Electrode – Cancel EXIT – Save Calibration Result The adjusted offset value, as well as the calculated sensor condition from the calibration routine is displayed here. MPD73LV-UL pH / Redox Monitor - 60 - Operating Guide...
  • Page 63 SB-168-1610 138/200 7pH Buffer standard colour coded Clear, 500ml. SB-054-1610 138/201 9pH Buffer standard colour coded Blue, 500ml. SR-009-1610 138/175 124mV Redox solution. 500ml SR-022-1610 138/176 358mV Redox solution. 500ml MPD73LV-UL pH / Redox Monitor - 61 - Operating Guide...
  • Page 64 Select whether to reset the sensor calibration, the temperature calibration or reset all of the channel’s user calibrations. / – Select Option – Return to Reset User Calibration EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 62 - Operating Guide...
  • Page 65 Channel Calibration Blank MPD73LV-UL pH / Redox Monitor - 63 - Operating Guide...
  • Page 66 Setpoints Setpoints The MPD73LV-UL is be fitted with two setpoint relays designated 1 & 2 . Both Setpoints “Change Over” style relays. The Setpoint/Relays menu contains all of the necessary setup functions to configure the setpoint sources. The instrument indicates the status of the enabled setpoints by means of the LED indicators located above the main instrument display.
  • Page 67  Latch Low / – Select Option – Cancel EXIT – Save Selection High The setpoint will activate when the associated Sensor Input Channel’s input becomes greater than the setpoint level. MPD73LV-UL pH / Redox Monitor - 65 - Operating Guide...
  • Page 68 Input Channel’s input is less than the setpoint low level and will remain active until the input rises above the setpoint high level. It will then remain inactive until the input level falls below the setpoint low level. MPD73LV-UL pH / Redox Monitor - 66 - Operating Guide...
  • Page 69 Pulse Proportional – See Setpoint proportional Mode Section. Time Proportional – See Setpoint proportional Mode Section. / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 67 - Operating Guide...
  • Page 70 High, Low or Band. / – Increase / Decrease Digit  – Select Next Digit EXIT – Cancel – Save Value Setpoint Trigger: Low – Hysteresis MPD73LV-UL pH / Redox Monitor - 68 - Operating Guide...
  • Page 71  An error will be set for that input channel. – Enter Setpoint Acknowledge Menu / – Scroll Around Menus Menu – Access Main Menu MPD73LV-UL pH / Redox Monitor - 69 - Operating Guide...
  • Page 72 – Cancel EXIT – Save Selection Charge Time Sets the initial charge time. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 70 - Operating Guide...
  • Page 73 Note – Once started the Initial charge timer will appear next to the associated input channel on the front screen. / – Select Option EXIT – Cancel – Save Selection MPD73LV-UL pH / Redox Monitor - 71 - Operating Guide...
  • Page 74 Setpoints Setpoint Proportional Mode In addition to On/Off mode the MPD73LV-UL also provides two forms of pseudo proportional control, which can be used to control the levels to a defined value when used in conjunction with a pump or valve. When the reading deviates from the programmed set point level the relay pulses at a rate proportional to that deviation.
  • Page 75 – Save Value Proportional Band Enter the size of the proportional band in measurement units. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 73 - Operating Guide...
  • Page 76 Only available when using unit alarm Note – By selecting Unit Alarm in the setpoint channel option each alarm option will activate if they occur on any of the instruments three sensor input channels. MPD73LV-UL pH / Redox Monitor - 74 - Operating Guide...
  • Page 77 – Cancel EXIT – Save Value Clean Interval Enter the time between cleaning operations. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 75 - Operating Guide...
  • Page 78 “On-line”, this provides the sensor a period to stabilise. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 76 - Operating Guide...
  • Page 79 This manually starts a clean cycle. Note this can also be accomplished via the digital inputs, see Digital Inputs section. / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 77 - Operating Guide...
  • Page 80 Current Output Current Output The MPD73LV-UL is fitted with up a single current output designated A. The current output menu contains all of the necessary setup functions to configure the current output source. Main Menu From the front screen press the menu button to show the main menu options and select 4-20mA Outputs.
  • Page 81 If the sensor reading falls outside this and the zero value an error / alarm will be activated. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 79 - Operating Guide...
  • Page 82 (i.e. Sensor Fault, Temperature Fault), to provide remote warning of error conditions or to ensure fail safe operation. / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 80 - Operating Guide...
  • Page 83 – Return to Main Menu EXIT – Enter Option Calibrate 4-20mA Outputs Select the current output you wish to calibrate. / – Select Option – Return to Calibration EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 81 - Operating Guide...
  • Page 84 Using the  and  buttons adjust the current output until it reads the desired value on your current meter. / – Adjust Output EXIT – Cancel – Save Adjustment MPD73LV-UL pH / Redox Monitor - 82 - Operating Guide...
  • Page 85 – Select Option – Return to Main Menu EXIT – Enter Option Reset User Calibration Select Reset 4-20mA Outputs. / – Select Option EXIT – Return to Calibration – Enter Option MPD73LV-UL pH / Redox Monitor - 83 - Operating Guide...
  • Page 86 4-20mA Outputs Reset Select the required 4-20mA Output to Reset its user calibration back to factory settings. / – Select Option – Return to Reset User Calibration EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 84 - Operating Guide...
  • Page 87 Digital Inputs Digital Inputs The MPD73LV-UL is fitted with eight digital inputs designated 1 – 8. Each individual digital input can be assigned to the Sensor Input or to the instrument as a whole. The digital input menu contains all of the necessary setup functions to configure the digital input sources.
  • Page 88 If the selected Input Sensor Channel has a setpoint configured for a cleaning operation, a external cleaning cycle can be initiated using this function. / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 86 - Operating Guide...
  • Page 89 Configure whether the digital input activates on the closing of circuit (normally open) or the opening of the circuit (normally closed). / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 87 - Operating Guide...
  • Page 90 Simulate Channels Simulate Channels The facility exists within the MPD73LV-UL to simulate the input sensor levels to test the setpoint and current output operation. This function allows the user to cycle up and down through the sensor range whilst displaying the current output level, and with the relays responding accordingly.
  • Page 91 / – Select Option – Return to Front Screen EXIT – Enter Option Language The MPD73LV-UL has the ability to support multilingual menus. The language of choice can be selected from this menu. / – Select Option EXIT – Cancel –...
  • Page 92 This allows the user to adjust the contrast of the display to compensate for environmental conditions that may affect the readability of the display. / – Select Option EXIT – Return to Main Menu – Enter Option MPD73LV-UL pH / Redox Monitor - 90 - Operating Guide...
  • Page 93  Channel Label – Define the channel label that appears on the front screen adjacent to the channel reading (7 characters maximum). / – Select Option – Return to Configuration Menu EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 91 - Operating Guide...
  • Page 94 By looking at the legend shown select which menu header location you wish to edit, then chose the value from the displayed pop-up. / – Select Option – Return to Configuration Menu EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 92 - Operating Guide...
  • Page 95 Configuration Service Alarms The MPD73LV-UL has an inbuilt Service Alarm for the measurement channel which will activate when the maintenance engineer’s service interval has expired. Note. By default, the alarms are disabled and can only be setup using the service access code which can be obtained from LTH Electronics.
  • Page 96 – Return to Configuration Menu EXIT Format SD Card Allows the users to reformat SD cards which are incompatible with the instrument. For cards which are greater than 4GB this may take several minutes. MPD73LV-UL pH / Redox Monitor - 94 - Operating Guide...
  • Page 97 Update Software Update Software The MPD73LV-UL operating software can be upgraded by saving the latest version from LTH onto a SD card, inserting it into the instrument and following the instructions below. All three files must be present on the SD card for the update to work. All units supplied after 1 October 2012 now support SDHC and SDXC cards using the fat32 format.
  • Page 98 Optional Software Functions Optional Software Functions The MPD73LV-UL series features optional software functions which when purchased will expand the instrument’s capabilities. These functions by default are locked. They can be unlocked by LTH or your local distributor at the time of order. Alternatively the functions may be ordered after purchase by supplying LTH or your local distributor the serial number of your instrument along with the purchase order.
  • Page 99 If the code is incorrect the user will be prompted to try again. If the code is correct the function will now be unlocked / – Change Character  – Select Next Character – Cancel EXIT – Enter Code MPD73LV-UL pH / Redox Monitor - 97 - Operating Guide...
  • Page 100 Datalogging Data Logging The Data logging optional software function expands the capabilities of the MPD73LV-UL by allowing the user to record over time the status of the instrument. It consists of two separate sections, Live Trending and SD Card Data Logging, which together will help the user to analyse and improve the performance of their application.
  • Page 101 Enter Trace’s maximum displayed value. Adjust in conjunction with the minimum displayed value to increase the measurements displayed resolution. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 99 - Operating Guide...
  • Page 102 Enter the time interval between samples for both trace 1 and trace 2. / – Increase / Decrease Digit  – Select Next Digit EXIT – Cancel – Save Value MPD73LV-UL pH / Redox Monitor - 100 - Operating Guide...
  • Page 103 – When in Review Mode and a SD card is present, saves a copy of the current 200 SAVE readings as a time stamped excel compatible file to the Live Trend folder on the SD card. MPD73LV-UL pH / Redox Monitor - 101 - Operating Guide...
  • Page 104 Note. If logging at 1 sample per second, 1GB of space on the SD card will provide at least 40 Days of logging. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 102 - Operating Guide...
  • Page 105 Whilst the card is being searched the SD card active symbol will flash. / – Select Option – Cancel EXIT – Save Selection MPD73LV-UL pH / Redox Monitor - 103 - Operating Guide...
  • Page 106 Note. If the SD card contains many files then there may be a delay whilst the card is searched. / – Increase / Decrease Digit  – Select Next Digit EXIT – Cancel – Save Value MPD73LV-UL pH / Redox Monitor - 104 - Operating Guide...
  • Page 107 Enter the Trace’s minimum displayed value. Adjust in conjunction with the maximum displayed value to increase the measurements displayed resolution. / – Increase / Decrease Digit  – Select Next Digit – Cancel EXIT – Save Value MPD73LV-UL pH / Redox Monitor - 105 - Operating Guide...
  • Page 108 2’s min and max as before with trace / – Select Option EXIT – Cancel – Save Selection View Graph View the configured graph. / – Select Option – Cancel EXIT – Enter Option MPD73LV-UL pH / Redox Monitor - 106 - Operating Guide...
  • Page 109 – Press to exit and return to View SD Card Data Logging menu.  or  – Moves the cursor across the screen. The pointed to value will be displayed at the bottom of the screen and the time at the top. MPD73LV-UL pH / Redox Monitor - 107 - Operating Guide...
  • Page 110 ! Beware the file is not protected; changes can be made and may be irreversible. If any changes are made it may affect the ability for the instrument to read the file if it is placed back into the instrument. MPD73LV-UL pH / Redox Monitor - 108 - Operating Guide...
  • Page 111 For more information regarding each error message select the required message and press the help button. / – Select Error – Return to Main Menu EXIT – Extended Information HELP MPD73LV-UL pH / Redox Monitor - 109 - Operating Guide...
  • Page 112 Save, Restore & Reset Save, Restore & Reset The MPD73LV-UL features the ability to save and restore the current configuration of a channel and its associated setpoints, current outputs, and digital inputs, into either one of two save slots inside the instrument.
  • Page 113 INFO button. / – Chose Location – Location Information INFO – Return to Save / Restore Menu EXIT – Select Location MPD73LV-UL pH / Redox Monitor - 111 - Operating Guide...
  • Page 114 3068 Ω 1155.4 115.54 3203 Ω 1194.0 119.40 3338 Ω 1232.4 123.24 3473 Ω 1270.7 127.07 3608 Ω 1308.9 130.89 3743 Ω 1347.0 134.70 3878 Ω 1385.0 138.50 4013 Ω MPD73LV-UL pH / Redox Monitor - 112 - Operating Guide...
  • Page 115 Check the unit's settings and then save the settings again to the SD card store. E016 UNIT SD CARD FULL The SD card has become full. To continue use, either replace with a blank SD card or remove existing files from SD card MPD73LV-UL pH / Redox Monitor - 113 - Operating Guide...
  • Page 116 Sensor User Slope At Limit The last Sensor Slope Calibration was out of limits, check sensor condition and connections and repeat calibration. If the message persists please consult with your supplier. MPD73LV-UL pH / Redox Monitor - 114 - Operating Guide...
  • Page 117 Luton Beds LU4 8EZ Tel. 0044 (0) 1582 593693 Fax 0044 (0) 1582 598036 Email sales@lth.co.uk NB. LTH overseas users should contact their LTH distributor – See www.lth.co.uk for details. MPD73LV-UL pH / Redox Monitor - 115 - Operating Guide...
  • Page 118 The Store B Save for the channel associated with this current output has become corrupted. Check the current output's settings in the current output menu and then save the settings again in the Channel's Store B in the Save/Restore menu. MPD73LV-UL pH / Redox Monitor - 116 - Operating Guide...
  • Page 119 The Store B Save for the channel associated with this current output has become corrupted. Check the current output's settings in the current output menu and then save the settings again in the Channel's Store B in the Save/Restore menu. MPD73LV-UL pH / Redox Monitor - 117 - Operating Guide...
  • Page 120 NOTE: THERE ARE NO USER SERVICEABLE PARTS INSIDE THE UNIT The MPD73LV-UL has been designed to include a wide range of self diagnostic test, some of which are performed at switch on, and some on a continuous basis. This guide aims to provide a route to diagnosing and correcting any faults that may occur during normal operation.
  • Page 121 This must be completely removed at the terminations to avoid a possible short circuit between the electrode and reference pair. MPD73LV-UL pH / Redox Monitor - 119 - Operating Guide...
  • Page 122 All sensors made by LTH Electronics Ltd are thoroughly tested to their published specification before despatch. As LTH have no control over the conditions in which their sensors are used, no further guarantee is given, although any complaints concerning their operation will be carefully investigated.
  • Page 123 EMC  ............ 2  Time / Date  ........ 93  EMI ............ 18  Unlock Software ...... 101  Error Messages ...... 115, 119  Connections ........ 21  Current Output  ...... 123  Current Outputs ...... 23  Input Channel  ....... 120  Digital Inputs ........ 25  Setpoint  ........ 122  MPD73LV‐UL ........ 21  Relays .......... 24  F  Supply Voltage  ........ 22  Fault Finding ........ 125  Temperature ........ 35  MPD73LV-UL pH / Redox Monitor - 121 - Operating Guide...
  • Page 124 Power Supply  ........ 15  Input Source ........ 68  Probe Type  .......... 44  Main Menu  ........ 67  PT1000 .......... 119  Mode .......... 70  Pulse Proportional Mode  .... 76  PP Mode ......... 71  Q  Simulated Channels  Main Menu  ........ 92  Quality........... 2  Simulated Input  ........ 46  MPD73LV-UL pH / Redox Monitor - 122 - Operating Guide...
  • Page 125 Standards  .......... 2  Termination Information .... 28  Time Proportional Mode .... 76  T  U  Telephone  .......... 1  Temperature  Units  ............ 44  Compensation ........ 45  Update Software ........ 99  Sensor Data ........ 119  W  Units .......... 45  Temperature Compensation  Warranty .......... 1  Calibration Manual Input .... 50  Weight .......... 15  Manual Input  ........ 45  Wiring .......... 16  Mode .......... 45  Temperature Input Sensor .... 44  MPD73LV-UL pH / Redox Monitor - 123 - Operating Guide...
  • Page 126 Notes MPD73LV-UL pH / Redox Monitor - 124 - Operating Guide...
  • Page 128 Chaul End Lane Luton Bedfordshire LU4 8EZ United Kingdom Telephone: +44 (0) 1582 593693 Fax: +44 (0) 1582 598036 Email: sales@lth.co.uk Web: www.lth.co.uk...