¥01 AR50 Manual (Begin.)
Contents
1. The arrow keys on the screen move the cursor up and down in order to highlight parameters that you would like to review or edit The edit button appears on the setup screens After you have highlighted a parameter that you would like to change the edit button allows you to access the available options for that parameter The clear button allows you to remove a setup parameter or standard buffer value from the meter s memory that may have been entered ata previous time or by a previous user thatis no longer of value to you Touching the clear button erases the value so you may enter a new one lt can also erase a parameter that you may have entered erroneously The BS button is a backspace button It appears on keypad screens and it allows you to back up and delete a character entered in error The delete button appears on the View Stored Data screens This button allows you to erase the data from the memory of the meter The prev button appears on the Data Screens when the data stored in the meter s memory has been accessed It allows you to scroll through data points sorted and stored prior to the current data point displayed The next button appears on the Data Screens when the data stored in the meter s memory has been accessed It allows you to scroll through data points sorted and stored after the current data point displayed2. Table of Contents accumet RESEARCH Connectors 8 Attaching pH and ISE electrodes 10 Attaching Conductivity Probes 12 Using the Meter Touch Screen O peration 14 Choosing a Channel 16 Button Functions 18 Setup Operations System Setup 20 pH Setup 46 mV Setup 82 lon Setup 90 Conductivity Setup 104 pH Operations 122 Standardization 124 Measurement 128 Absolute mV Measurement 131 Relative mV Measurement 131 accumet Table of Contents RESEARCH Direct Reading with Standards 134 Direct Reading with Blank O ffset 137 Incremental M ethods 140 Known Addition Measurement 142 Known Subtraction Measurement 146 Analate Addition Measurement 148 Analate Subtraction Measurement 150 Conductivity Standardization 154 Operations M easurement 158 Determining Isopotential Points Experimentally 165 Data Management 166 Factory Default Settings 167 pH Theory 169 ISE Theory 174 Conductivity Theory 178 Replacement Parts 183 Introduction Thank you for selecting a Fisher Scientific accumet pH meter This manual describes the operation of the accumet AR50 meter The state of the art meter that you have purchased is easy to operate and will guide you through the various functions by displaying easy to understand prompts This operating manual should answer any questions that might arise in operating your meter however do not hesitate to call our Fisher Lab Equipment Technical Support Hotline at 1 800 943 2006 or 412 490
3. slope 000 0 auto read ON mv 0000 0 BUFFERS Last std Sep 17 10 17 am September 17 1997 11 11 am uS cm channel 2 0 010 ID 00000 ATC 26 2 C Ref 25 C Cell K 1 00 cm Co 0 00 C STND Laststd Sep 17 10 10 am accumet CHOOSING A CHANNEL Using the Meter RESEARCH The accumet Research AR50 is a Multi channel pH meter W ith this meter you can switch from channel 1 to channel 2 You can also view both channels at the same time by accessing the dual channel mode If you set the meter to view both channels you cannot change the parameters without choosing the screen that you want to modify The setup parameters for each screen are setup independently of one another Choosing a Channel Fi Touch anywhere on the Standby screen OR Touch channel on the main screen THEN FA Touch 1 2 or dual to access the channel that you want to view If you are in any measure mode touch mode until To access System Setup from the Standby screen you access the main screen Fi Touch anywhere on the Standby screen Touch 1 or 2 on the channel screen to access either channel Touch setup iS Touch system on the Setup screen Using the Meter BUTTON FUNCTIONS accumet RESEARCH The touch screen of your accumet Research pH meter has buttons along the right side of the screen that are common to many of the screens The following indicates the function of these comm
4. 6260 if you need any assistance This meter is designed to provide all the information necessary to guide you through the process of measuring pH mV ion concentration or conductivity with a series of prompts on the screen The accumet Research AR50 provides microprocessor precision in a compact benchtop design that is easy to use One touch screen controls all procedures letting you e Measure pH absolute mV relative mV ion concentration or conductivity Select one of three sets of standard buffer groups Implement automatic buffer recognition Standardize with up to five standard or custom buffers Customize your display screen and operating parameters Assign operator and sample identification numbers Specify ion selective electrode type Store 250 data points in the meter s memory or transfer data to a computer or printer Access extensive online help with just a touch of a button It all adds up to rapid completely automatic intuitive operation accumet RESEARCH accumet RESEARCH The following is a listing of what you should have received with your new accumet AR50 pH mV lon Conductivity meter Meter with kit includes meter power supply electrode arm support bracket electrode arm electrode 13620 285 ATC probe 13 620 19 manual and literature Note that this meter does not include a conductivity cell Meter only includes meter power supply electrode arm support bracket manual and lite
5. anywhere on this screen to access the functions of the meter The buttons on the right side of the screen control all of the functions of the meter A light touch on the screen is all that you need to access the various functions Once you touch a button you will get an audible tone the screen will not change until you lift your finger This design prevents rapid uncontrolled scrolling through the various function screens Function buttons and options change from screen to screen Easy to understand prompts guide you through the operation of the meter in the selected mode If you are ever in doubt about what to do just touch help on the bottom right corner of the screen for detailed information about that screen The touch screen is made of a durable polyester material that is chemically resistant Maintenance is simple with this meter To clean the screen you just need to wipe it with a damp cloth and dry it with a clean dry towel For additional information see cleaning and troubleshooting sections of the manual pages 160 161 Using the Meter CHOOSING A CHANNEL accumet RESEARCH Main screen Channel screen Fisher Scientific O Fisher Scientific accumet AR50 accumet AR50 Select from the options to the right Select your desired measurement channel September 17 1997 11 11am September 17 1997 11 11 am Dual screen Measure channel 1 9 295 ID 00000 ATC 26 2 C auto buffer ON
6. e two types of conductivity cells the 2 cell conductivity cell with dual pin connector and the 4 cell conductivity cell with DIN connector The 2 cell conductivity probe works in channel 1 and the 4 cell conductivity cell works in channel 2 FI Carefully remove the protective cover from the end of the conductivity cell Before using your conductivity cell soak itfor 5 to 10 minutes in distilled or deionized water Connect the 2 cell conductivity cell to the 2 lt ell jack Install the ATC probe in the ATC 1 jack OR Connect the 4 cell conductivity cell to the 4 cell jack The 4 cell accumet conductivity cells have builtin ATC probes Therefore there is no need to install a separate ATC probe accumet CONDUCTIVITY PROBES Getting Started RESEARCH 3 Rinse and blot dry don t wipe probe between each measurement Rinse probe with distilled or deionized water or a portion of the next solution to be measured Between measurements store conductivity probes dry Using the Meter TOUCH SCREEN OPERATION sano et RESE RCH Standby screen E Fisher Scientific Touch anywhere to resume accumet TOUCH SCREEN OPERATION Using the Meter RESEARCH The new accumet Research benchtop pH meters operate with a state of the art touch screen The touch screen makes this the easiest meter on the market to operate and care for W hen the meter is first plugged in the STAN DBY screen will appear Touch
7. electrode arm to the base electrode arm support To connect RS 232 see Data Management on page 166 Ik Connect the power cable to the rear connector panel power jack and to a power source POWER Getting Started PH and ION SPECIFIC ELECTRODES If both a conventional electrode and an AccuFET electrode are connected to the meter do not put them in a solution together because you will get inaccurate measurements Do not discard the BNC shorting cap accumet RESEARCH This meter allows you to use two types of pH electrodes the conventional glass pH electrode and the AccuFET field effect transistor FET pH electrode If both types of pH electrodes are connected the meter will read the AccuFET electrode This meter also allows you to use ion specific electrodes Carefully remove the protective cover from the end of the electrode Before first using your glass pH electrode or whenever the electrode is dry soak it 2 4 hours in an electrode storage solution pH 4 Buffer or KCI solution Before using your ion specific electrode consult the manufacturer s instructions for electrode preparation Remove the shorting cap on BNC connector Connect the combination pH electrode by plugging it into the BNC input connector twisting to lock in place If a combination electrode isn t used connect the indicating pH electrode into the BNC input connector Plug the reference electrode i
8. ge 1x106 to 9 99x1010 resolution 0 1 0 01 0 001 relative accuracy 0 17n calibration points 5 incremental methods KA KS AA AS accumet RESEARCH conductivity Mode Mode cell constants range conductivity resistivity salinity accuracy Temperature Mode range resolution accuracy General inputs outputs electrical requirements output from PSU line voltage tolerance input impedance meter size meter weight 0 1 1 0 10 0 to 3x105 uS cm 30 ohm cm to 100 megohm cm 2 to 42 ppt 0 5 5 0 to 105 0 C 0 1 C 0 2 C 2BNC 2Pin 2ATC 2 pin cond RS232 DIN for FET and 4 cell cond 115 V 60 Hz 230 V 50 Hz 12VDC 500mA 10 gt 10 2 ohms 5 5 xX 7 5 x 3 25 1 86 Ib Operating Conditions perating Conditions operating temperature operation humidity maximum operating altitude installation category Pollution category degree 5 45 C 5 80 noncondensing 2000m II 2 Specifications Getting Started CONNECTORS accumet RESEARCH FI Review the layout and arrangement of the rear connector panel Conductivity Cells AccuFET pH electrode Automatic Temperature Compensation ATC Power Reference pin jack Computer Printer BNC input connector Se seo ee ee ee eee se eet y y YY y y POWER RS 232 Conductivity FET ATC 1 Ref 1 Input 1 he Conductivity ACT2 Ref 2 Input 2 oO accum et CONNECTORS Getting Started 2 Connect the
9. his information will include step by step instructions for operating the meter from the current screen and possible applications information for that screen The close key appears on the bottom of all help screens and allows you to exit the help screen and return to the previous screen The more button appears on the help screens and allows you to advance to the next help screen for additional information The back button appears on the help screens and allows you to move back to a previous help screen accumet RESEARCH delete BUTTON FUNCTIONS Using the Meter This button accesses the standardization screen from the various measure modes and initiates standardization of the meter once the standardization screen is accessed This button is the measure button and directs the meter to measure your sample when in the Auto Read function of the pH or lon modes This button will access the setup screens for the measuring mode that you are currently using It can also be used to access the system setup screen that allows you to set parameters that are not related to measure ments such as the time and the date The print button will send information to the output device that you have connected to your accumet meter The output device can be a printer data logger or a computer In addition to this touching the print button will also send data to the data storage center of the meter if a sample ID has been assigned to your sample
10. nto the reference pin jack Also install the ATC probe into the ATC jack Note Be sure to connect all probes to the appropriate channel connectors for example Input 1 Ref 1 and ATC 1 Option Connect the optional AccuFET electrode by plugging it into the FET jack on the back meter panel Allow the AccuFET to warm up five minutes before use Connect ion specific electrodes in the same manner as pH electrodes accumet pH and ION SPECIFIC ELECTRODES Getting Started RESEARCH El Rinse and blot dry don t wipe electrodes between each measurement Rinse electrodes with distilled or deionized water or a portion of the next solution to be measured Between measurements store conventional pH electrodes in electrode storage solution pH 4 hole of liquid filled combination electrodes open Refill when the level of solution gets below the manufacturer s recommended level Store ion specific electrodes according to electrode manufacturer s recommendations buffer or KCI solution Always leave the filling Proper electrode care is fundamental to obtaining reliable pH measurements Improper care of the electrode may cause the meter reading to drift respond slowly or produce erroneous readings For this reason the electrode should always be conditioned and used in accordance with manufacturer s instructions Getting Started CONDUCTIVITY PROBES accumet RESEARCH This meter also allows you to us
11. on buttons This is the standby button and it allows you to access the standby mode W hen in standby the meter will not take measurements It is in a state of rest W hen you touch stdby the meter will return to the standby screen which says Fisher Scientific and displays the time This button allows you to access the channel screen to choose what channel you want to view This button appears only on multichannel meters such as the accumet AR25 and AR50 This button also allows you to move from the main mode screen to the channel screen to access the standby mode The mode button allows you to switch between the various operations of the meter These operations depending upon which meter you have include four measuring modes pH mV ion conductivity as well as a setup mode The enter button allows you to accept any changes that you have made on setup screens or accept values that you have input with keypads W hen touched enter will save the changes and return you to the previous screen The save button allows you to save multiple changes you have made on One screen as a group It functions like the enter button does for individual changes The exit button allows you to leave the screen you are currently viewing and return to the previous screen without making any changes The help button allows you to access helpful information on any screen W hen you touch the help button information about the current screen appears T
12. rature If any of these items are missing please contact the Fisher Products Group Electrochemistry Operation by dialing 412 490 6267 Accessory Conductivity Probes and lon Selective Electrodes are available and can be ordered by calling Fisher Customer Service at 800 766 7000 2 cell Conductivity Probes Cell Constant Optimal Conductivity Range Glass Body Epoxy Body 0 1 0 5 to 200 uS cm 13620 156 13620 161 1 0 0 01 to 2 mS cm 13 620 155 13620 160 10 0 1 to 200 mS cm 13620 157 13620 162 4 cell Conductivity Probes Cell Constant Optimal Conductivity Range Glass Body Epoxy Body 1 0 0 01 to 20 uS cm 13 620 163 13 620 165 10 0 1 to 200 mS cm 13620 164 13620 166 Unpacking the Meter Specifications accumet RESEARCH Display ESE 640x480 digit LCD screen size 41 2 x6 measurement display height 3 4 temp etc display height 1 4 menu options extensive help screens extensive configurable display yes keypad controls context specific touchscreen Memory 250 data pts internal diagnostics yes programmable data storage store on stable time manual programmable data output output on stable time manual print interval 1 to 9 999 sec programmable alarm yes pH Mode Mode range 2 000 to 20 000 resolution 0 1 0 01 0 001 relative accuracy 0 002 automatic buffer recognition yes manual buffer recognition yes calibration points 5 auto lock yes FET yes range 1800 0 resolution 0 1 accuracy 0 1 ran
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