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Orion Benchtop pH/ISE Meter Instruction Manual

Use with Accessories

C. Remote Control for Orion 520Aplus, 525Aplus,

720Aplus, and 920Aplus

The meters can be remotely controlled from a personal computer or other
RS232 communication device. After making the physical connection
between your meter and computing device, type

rem

to establish

communication. The following list is the remote control commands.
All commands are lower case letters.

Command

Function or Meaning

minus key

decimal point

0 thru 9

numerals or each represents their respective keys

Alarm Limits

Activate Timer

beep

BEEP toggle

cal

Calibrate

Calibration edit (920Aplus only)

disp

Display reading, value, mode, and temperature

dlz

clear datalog

dpm

set data print mode

set date and time

ech

select electrode channel(920Aplus, 720Aplus and
525Aplus only)

eid

specify electrode I.D.(920Aplus only)

exit

exit remote control

fir

First key

help

display list of commands

Содержание Orion 410Aplus

Страница 1: ...s no 1st 2nd 4 hold incr tech 1 mode 2 calibrate cal edit 5 resolution channel 6 slope electrode ID 3 measure stability date time beep 7 print data log mV 8 activate set timer 0 standby options data p...

Страница 2: ...at Face The Enhanced Lab ThermaSense Triode TRIUMpH Unbreakable pH Universal Access are trademarks of Thermo Guaranteed Success and The Technical Edge are service marks of Thermo PerpHecT meters are p...

Страница 3: ...G Models 720Aplus and 920Aplus Check Out Procedure 11 Instrument Set Up 12 Chapter IV Rear Panel and Electrode Connections 13 A Rear Panel 13 B Electrode Connections 14 Chapter V Calibration and Measu...

Страница 4: ...s Remote Control 60 C Models 520Aplus 525Aplus 720Aplus 920Aplus Remote Control 62 D Use with Model 607 Electrode Switchbox 65 E Use with Strip Chart Recorders 66 F Use with DataCOLLECT 66 Chapter X T...

Страница 5: ...controlled and feature pH autocalibration sealed keypads simultaneous temperature display and many other features The Orion 410Aplus 420Aplus and 710Aplus feature a custom LCD display The Orion 520Apl...

Страница 6: ...2 Orion Benchtop pH ISE Meter Instruction Manual...

Страница 7: ...feedback and 3 an RS232 port for use with the Orion 900A printer or other serial peripheral devices Orion 520Aplus 525Aplus 720Aplus 920Aplus General Information The Orion 520Aplus is a pH mV Tempera...

Страница 8: ...ting becomes necessary 1 Connect BNC shorting cap Orion 090045 supplied with meter to sensing electrode input 2 Disconnect the ATC probe 3 Plug line Orion 020125 for 110V Orion 020130 for 220V into an...

Страница 9: ...ct BNC shorting cap Orion 090045 supplied with meter to sensing electrode input 2 Disconnect the ATC probe 3 Plug line adapter Orion 020125 for 110V Orion 020130 for 220V into an appropriate wall outl...

Страница 10: ...eads 100 0 and then press yes The meter advances to MEASURE and the display should now read steady 7 00 NOTE To change a value press or The first digit will flash continue scrolling until the first di...

Страница 11: ...indicator is displayed The display should read 1 00 NOTE If this is the first time this procedure has been performed the reading should be 1 00 a If not press 2nd cal At the P1 prompt scroll until th...

Страница 12: ...connect the ATC probe 3 Plug line adapter Orion 020125 for 110V Orion 020130 for 220V into an appropriate wall outlet then securely into meter power receptacle NOTE Firmly push the power adapter into...

Страница 13: ...25 0 C If not press 1st set temp and enter 25 0 then press yes b Press 1st calibrate Enter 1 buffer then press yes Display should read 7 00 pH If not enter 7 00 and press yes c Meter should display t...

Страница 14: ...l sensing electrode input s 2 Disconnect the ATC probe 3 Plug line adapter Orion 020125 for 110V Orion 020130 for 220V into an appropriate wall outlet then securely into meter power receptacle NOTE Fi...

Страница 15: ...d press yes at the READY CAL AS prompt c Meter should display the slope 100 0 PCT If not enter 100 0 and press yes d Meter will return to measure mode Display should read 6 997 0 02 6 Press mode to di...

Страница 16: ...and To adjust the viewing angle turn the instrument over and place your thumbs on the inside of the stand sides As you lift the stand gently push the sides of the stand out This will lock the stand at...

Страница 17: ...connectors 3 Gnd Earth ground jack accepts standard pin tip connectors 4 ATC Automatic Temperature Compensator jack accepts thermistor type ATC probe with DIN connector 5 KF Polarizing current source...

Страница 18: ...se to lock into position Connect reference electrodes with pin tip connectors by pushing connector straight into reference input NOTE If using a combination electrode with a BNC connector a reference...

Страница 19: ...egion of the curve the electrode slope for that region is employed in the calculation of sample pH After calibration the average electrode slope for all the segments of the entire calibration curve is...

Страница 20: ...e corrected pH results in the main display For Manual Temperature Compensation with Orion 520Aplus 525Aplus 720Aplus and 920Aplus disconnect the temperature probe Temperature values can be entered man...

Страница 21: ...es and displays the temperature corrected value for that buffer Pressing yes enters the value into memory Manual Calibration To calibrate with buffers other than 4 01 7 00 or 10 01 use the manual cali...

Страница 22: ...ach digit until the correct pH value is displayed then press yes to accept 6 The temperature corrected value for that buffer is automatically entered into the memory of the meter P2 will be displayed...

Страница 23: ...If you want to exit the menu at any time press measure Manual Calibration To calibrate with buffers other than 4 01 7 00 or 10 01 use the manual calibration technique The chosen buffers must be great...

Страница 24: ...ess yes to accept each digit After accepting each digit press yes store buffer value The meter display freezes for three seconds The meter automatically switches to buffer two indicated by the P2 on t...

Страница 25: ...is stable the meter automatically recognizes and displays the temperature corrected value for that buffer Press yes to the READY CAL AS prompt to enter the value in memory Manual Calibration To calibr...

Страница 26: ...your buffer If performing a manual calibration use the numeric keys to change the value then press yes 6 If 2 or 3 buffers were selected repeat steps 4 and 5 for each buffer 7a If one buffer was sele...

Страница 27: ...es and displays the temperature corrected value for that buffer Pressing yes to the READY CAL AS prompt enters the value in memory Manual Calibration To calibrate with buffers other than 1 68 4 01 7 0...

Страница 28: ...manual calibration use the numeric keys to change the value then press yes 7 If more than one buffer was selected repeat steps 5 and 6 for each buffer 8a If one buffer was selected the current electro...

Страница 29: ...t to exit this menu at any time press measure Manual Calibration To calibrate with buffers other than 1 68 4 01 7 00 10 01 or 12 46 use the manual calibration technique The calibration sequence is the...

Страница 30: ...press or to change the value then press yes The buffer value is stored and meter display freezes for three seconds The meter automatically switches to buffer two indicated by the P2 on the display in...

Страница 31: ...plays the temperature corrected value for that buffer Pressing yes to the READY CAL AS prompt enters the value into memory Manual Calibration To calibrate with buffers other than 1 68 4 01 7 00 10 01...

Страница 32: ...AS prompt will appear Press yes if the value is correct for your buffer If performing a manual calibration use the numeric keys to change the value Press yes 7 If more than one buffer was selected re...

Страница 33: ...isplays the temperature corrected value for that buffer Press yes to the READY CAL AS prompt to enter the value in memory Manual Calibration To calibrate with buffers other than 1 68 4 01 7 00 10 01 o...

Страница 34: ...NO BUFFERS is displayed Enter the number of buffers 1 2 3 4 or 5 then press yes 4 When the BUFFER 1 prompt appears rinse electrode s and place into first buffer Wait for a stable display 5 When the e...

Страница 35: ...ly and storing the slope value into memory Perform a calibration with one standard every two hours to compensate for possible electrode drift Use a fresh aliquot from one of the standards used in the...

Страница 36: ...ope displayed may be lower than normal especially if standards close to the electrode limit of detection are used in the calibration Autoblank Correction Blank correction occurs automatically when cal...

Страница 37: ...will flash Position the decimal point using or then press yes The first digit will flash Scroll to the desired value then press yes Continue for each digit on the display There are 4 1 2 digits plus a...

Страница 38: ...libration and press yes 6 Rinse electrode s and place into first standard the least concentrated standard Wait for stable display 7 When the READY ENTER VALUE prompt appears enter the concentration va...

Страница 39: ...1 X To select a different channel press 2nd then channel 2 Identify the electrode correctly Press 2nd then electrode id to access the electrode ID function The channel and current electrode identifica...

Страница 40: ...r stable display 6 When the READY ENTER VALUE prompt appears enter the concentration value of the standard and press yes 7 If two or more standards were selected repeat steps 5 and 6 for each standard...

Страница 41: ...t by placing electrode s in the standard or buffer then entering the correct value Edit has two choices change or delete Select change if a data entry error was made but electrode s were in the correc...

Страница 42: ...If 1 selected Place electrode s in the standard READY ENTER and wait for a stable display VALUE Enter the value of the standard and press yes 5 If 2 selected Press 1 or 2 then yes 1 CHANGE 2 DELETE 6...

Страница 43: ...y chosen b Sample and standard must be volumetrically determined c Any complexing agent must be present in excess at least 50 to 100 times or not at all Double incremental techniques calculate electro...

Страница 44: ...le and 10 mL of diluent enter 110 Press yes 8 STD CONC Enter the concentration of the standard to be added to the sample Press yes 9 1 NA IN SAMPLE Rinse electrode s and place into sample and press ye...

Страница 45: ...ectrode instruction manual Single Incremental Techniques Single incremental techniques are useful for occasional samples or samples with complex matrices Another advantage of the single incremental te...

Страница 46: ...nstruction manual for specific information Single Known Addition Measurement Procedure A standard of known concentration is added to a sample of unknown concentration Total concentration should approx...

Страница 47: ...le is to be subtracted by the addition of silver Ag Two Ag ions are required to subtract each S ion therefore the reaction ratio is 0 5 NOTE Make sure the correct reaction ratio of sample to standard...

Страница 48: ...electrode membrane It is especially important with double incremental techniques to be sure that any complexing agent is present in great excess or not at all The ratio of free ion to complexed ion m...

Страница 49: ...incr tech 2 1 ADDN 2 SUBTR Press 1 then yes 3 KNOWN ADDN The meter verifies your choice Wait for the next prompt 4 1 SINGLE 2 DOUBLE Press 2 then yes 5 DOUBLE The meter verifies your choice KNOWN ADDN...

Страница 50: ...standard addition to the sample beaker Press yes 16 MEAS G SAMP STD Wait for a stable display and 1 NA READY press yes YES TO CONTINUE 17 SLOPE The meter calculates and displays the electrode slope f...

Страница 51: ...on ability of chosen standard concentration and volume added does not exceed the concentration of sample For most double known subtraction analysis it is recommended that a Sample volume be 100 mL b T...

Страница 52: ...nge 5 0 to 105 C simultaneously with sample results Whenever an ATC probe is connected live temperature measurements are displayed in the prompt line For results greater than 100 C the tenth digit is...

Страница 53: ...te millivolts are displayed with 0 1 mV resolution in the range of 1600 0 to 1600 0 mV Access the absolute millivolt mode by pressing mode until the mV mode indicator is displayed Relative Millivolts...

Страница 54: ...The millivolt potential will be displayed in the main field and the temperature will be displayed in the prompt line The range is 1600 0 mV with a resolution of 0 1 mV Relative mV The range is 1999 9...

Страница 55: ...t modes Perform the following steps 1 Securely connect electrode s to input 1 or 2 2 For Orion 920Aplus only a Identify the electrode type as REDOX Press 2nd then electrode id b Select 25 redox then p...

Страница 56: ...om Insert the electrode making sure that the electrode tip is not immersed in the water and does not have water droplets clinging to the outside of the membrane Let stand approximately 30 minutes to e...

Страница 57: ...zero calibration control on the electrode to set the meter to read 0 00 10 Insert the reservoir funnel into a BOD bottle containing enough water to just cover the bottom Insert the electrode making su...

Страница 58: ...eter and the meter should be calibrated to pH 7 at 25 0 C 4 Press mode until pH mode indicator is displayed 5 Press hold Turn the hold feature off 6 Press measure Press set temp Enter 25 0 at the prom...

Страница 59: ...s bottle should be used for storage between measurements 13 Turn the electrode mode switch to the AIR position If measurements are being made at sea level use the AIR calibration control on the electr...

Страница 60: ...13 40 or greater on the meter 9 Turn the mode switch on the electrode to ZERO Use the zero calibration control on the electrode to set the meter to read 0 00 10 Insert the reservoir funnel into a BOD...

Страница 61: ...Karl Fischer adapter Orion 090048 1 Insert KF electrode pin tip connector into the KF adapter Connect the other pin tip of the electrode into the reference input 2 Connect the BNC plug of the KF adap...

Страница 62: ...d other serial peripheral devices Orion provides a cable Orion 0ACBL0 for interfacing your meter to an IBM PC or compatible device For other computers and communication devices a suitable cable must b...

Страница 63: ...ord of results The 900A printer can be battery operated or connected to line power Plug the printer directly into the meter using the nine pin D shell connector on the left side of the meter The meter...

Страница 64: ...computer to establish communication The following are the remote control commands Command Function or Meaning increase value scroll up decrease value scroll down cal calibrate disp display LCD image e...

Страница 65: ...t LOG OUT OF THE METER 360 PRINT END OF PROGRAM 370 CLOSE 1 COM 1 OFF TURN OFF THE COMMUNICATION INTERRUPT 380 END 390 400 410 THIS IS THE INTERRUPT ROUTINE THAT HANDLES ALL INCOMING CHARACTERS 420 FR...

Страница 66: ...ist is the remote control commands All commands are lower case letters Command Function or Meaning minus key decimal point 0 thru 9 numerals or each represents their respective keys al Alarm Limits at...

Страница 67: ...measure mode change modes mv millivolt display n No opt select options menu pr print or datalog ready ready function toggle rem enter remote control function res select resolution sec second key slope...

Страница 68: ...OUT OF THE METER 360 PRINT END OF PROGRAM 370 CLOSE 1 COM 1 OFF TURN OFF THE COMMUNICATION INTERRUPT 380 END 390 400 410 THIS IS THE INTERRUPT ROUTINE THAT HANDLES ALL INCOMING CHARACTERS 420 FROM TH...

Страница 69: ...into the jack labeled power on the Switchbox 3 Press 2nd then options on the 920Aplus Meter to access the options menu Identify the use of a switchbox in the options menu Once the instrument and swit...

Страница 70: ...d to the low side of the recorder A Switchcraft type 850 or equivalent phone plug is suggested F Use with DataCOLLECT DataCOLLECT can be used with Orion 520Aplus 525Aplus 720Aplus and 920Aplus DataCOL...

Страница 71: ...lus 420Aplus and 710Aplus During the self test the meter displays the code 7E57 in the main display and the number of the test being performed in the lower display Additional meter displays occur depe...

Страница 72: ...720Aplus and 920Aplus If no keys are pressed or there is a problem with a key the meter will recognize an error and display E 7 for Orion 420Aplus and 710Aplus and ERROR 7 for Orion 520Aplus 525Aplus...

Страница 73: ...t Display Error E 2 Ram Check Error E 3 Input Channel 1 Error Check to make sure the shorting cap is securely in place on the input connector and repeat self test E 4 Input Channel 2 Error Check to ma...

Страница 74: ...re temperature is within 5 0 to 105 C E 21 ABR error Electrode voltage being measured pH autocalibration is 0 5 pH units from the error nominal value for the pH buffer therefore the meter does not rec...

Страница 75: ...g fresh buffers 2 Clean electrode s and refill reference electrode s 3 Refer to electrode instruction manual for instructions on how to check electrode operation E 26 Datalog Full The datalogger is fu...

Страница 76: ...t matches the pin configuration of the meter Use Orion 0ACBL0 for IBM PC or compatible devices E 28 Incremental The concentration of the unknown Techniques cannot be calculated This can occur 920Aplus...

Страница 77: ...ror The meter is sending information to a printer and there is no printer plugged into the meter or the printer is not turned on 1 Plug in the printer and turn it on 2 If printer is not available sele...

Страница 78: ...on has been defined as zero concentration and the actual concentration of the blank is substantially greater than the least concentrated standard This can also occur during a one or two point calibrat...

Страница 79: ...hen the Autoshutoff be turned on feature is on the meter will automatically shut down if no keys have been pressed within 10 minutes For Orion 410Aplus 420Aplus and 710Aplus press the power key to tur...

Страница 80: ...Autocalibration the limits of 0 5 Buffers used may be pH units out of specification Repeat calibration using fresh buffers or from a different lot Meter display Meter failure For Orion 420Aplus Locks...

Страница 81: ...ponents of your measurement system contact The Technical EdgeSM for Orion products Within the United States call 1 800 225 1480 outside the United States call 978 232 6000 or fax 978 232 6031 In Europ...

Страница 82: ...hen operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever m...

Страница 83: ...s CSA C22 2 No 223 Extra Low Voltage Transformers CSA C22 2 No 151 M1986 Laboratory Equipment UL Std No 1262 Laboratory Equipment EMC EC 89 336 EEC Electromagnetic Compatibility Emissions EN 55022 Emi...

Страница 84: ...80 Orion Benchtop pH ISE Meter Instruction Manual Certificate of Conformity...

Страница 85: ...ty repair or replacement In the event of failure within the warranty period Thermo will at the company s option repair or replace product not conforming to this warranty There may be additional charge...

Страница 86: ...ate of shipment from Thermo Laboratory pH Meters Orion 301 611 and 940 SensorLink pHuture pH Meters Orion 610 and 620 Sage Pumps Cahn Balances 930 Ionalyzer 950 ROSS FAST QC Titrator 960 Titrator PLUS...

Страница 87: ...07WL 9109WL and 9109WP QuiKcheK Meters and Micro Electrodes Three months from date of purchase by the user or six months from date of shipment from Thermo Economy Line Electrodes Orion 91 05 91 06 91...

Страница 88: ...O EVENT SHALL THERMO ITS CONTRACTORS AND SUPPLIERS OF ANY TIER BE LIABLE TO THE BUYER OR ANY PERSON FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER THE CLAIMS ARE BASED IN CONTRAC...

Страница 89: ...bination pH ATC probe 110V wall adapter benchtop meter starter kit OBCHSK 0525A0 Orion 525Aplus pH mV Temperature Meter with custom vacuum fluorescent display 110V Includes Orion combination ROSS elec...

Страница 90: ...one 475 mL bottle each of pH 4 pH 7 and pH 10 buffer solution and one 475 mL bottle of electrode storage solution 0900A0 Portable Printer for Orion Meters Includes Rechargeable battery and one roll o...

Страница 91: ...n 475 mL 910410 perpHect Buffer Solution pH 4 10 pk 910425 perpHect Buffer Solution pH 4 25 pk 910710 perpHect Buffer Solution pH 7 10 pk 910725 perpHect Buffer Solution pH 7 25 pk 910110 perpHect Buf...

Страница 92: ...Orion Benchtop pH ISE Meter Instruction Manual 88...

Страница 93: ...Celsius The C display designation is displayed when temperature is displayed ATC Displayed when a temperature probe is attached ready Displayed when the electrode is stable READY may be turned on or...

Страница 94: ...10Aplus The SETUP menu is used to identify and change instrument operating parameters While in setup yes is used to scroll through the menu without changing any parameters no is used to scroll through...

Страница 95: ...ture in degrees Celsius The C designation is displayed when temperature is displayed ATC Displayed when a temperature probe is attached pH mV Rel mV Conc SETUP CALIBRATE MEASURE 2nd ready bold EXP ON...

Страница 96: ...ady Displayed when the electrode is stable READY may be turned on or off in the SETUP menu hold Displayed when the pH reading is frozen after reaching stability The HOLD feature may be turned on or of...

Страница 97: ...ers no Press to cancel or to change to a parameter before entering measure Press for sample analysis Instrument will remain in measure mode until another key is pressed Press to unlock HOLD during sam...

Страница 98: ...bration sequence is completed Set up menu for Orion 420Aplus and 710Aplus The SETUP menu is used to identify and change instrument operating parameters While in setup yes is used to scroll through the...

Страница 99: ...n a key is pressed and when an operator assistance code appears The default setting is on 1 4 AUTO Turning AUTOSHUTOFF on will cause the SHUTOFF meter to turn off if no keys have been pressed for 10 m...

Страница 100: ...aximum INTERVAL interval that can be set is 23 hours 59 minutes and 59 seconds The minimum interval is five 5 seconds When the TIMER INTERVAL code 3 1 is displayed the current interval hours setting i...

Страница 101: ...livolts Press or to change then press yes 4 2 LOW Sets the low alarm limit for the current ALARM measurement mode When the reading falls LIMIT below the set limit the alarm will ring 710Aplus only The...

Страница 102: ...ss yes The default setting is 1 minute The following set up modes apply to the 710Aplus model only 6 1 DATA Sets the datalogger mode Up to 25 points LOGGERS may be stored in mode memory at any one tim...

Страница 103: ...l minutes seconds will be displayed in the main field Press or to change then press yes The default setting is 5 seconds 6 3 TRANSFER Transfers data from the datalogger to a DATA printer or a computer...

Страница 104: ...Orion Benchtop pH ISE Meter Instruction Manual 100...

Страница 105: ...o enter a numeric value The instrument knows when to expect a numeric value and will allow the use of numeric at this time only Otherwise the primary functions are active yes no 1st 2nd 4 hold incr te...

Страница 106: ...ipoint calibrations See the Orion 920Aplus special features section for more information Key 3 Measure Pressing measure 3 returns the meter to measure mode for sample analysis While in measure mode th...

Страница 107: ...s Both Single and Double Known Addition and Known Subtraction can be performed using this function See the 920Aplus special features section for a complete description Key 5 Resolution Press resolutio...

Страница 108: ...I D 920Aplus Reviewing the slope and isopotential point is useful when diagnosing measurement problems Electrode I D 920A only Press 2nd then electrode ID 6 to change the electrode identification on...

Страница 109: ...display Press yes 4 Timer off 6 Timer on Press no to continue with the current interval and return to measure mode Set Timer To set the timer interval press 2nd then set timer 8 The meter will presen...

Страница 110: ...ine will show ENTER VALUE Use the numeric keys to enter the temperature of your solution then press yes The meter verifies your entry then returns to measure mode See temperature compensation section...

Страница 111: ...s yes 4 12 31 90 The date is verified then continue to enter time 5 ENTER HOUR Enter the current hour then press yes 6 ENTER MINUTE Enter the current minutes setting and press yes 7 23 59 The time is...

Страница 112: ...for the prompt 2 SET PRINT MODE Press yes 3 1 RDY The three print options are displayed 2 TIM along with current setting 3 MAN 1 For Print on ready 2 For Print at a timed interval 3 For manual Print...

Страница 113: ...time Press no to display the other two Enter 0 1 2 or 3 then press yes 0 To disable datalogging 1 For datalogging on ready 2 For datalogging at present time interval 3 For manual datalogging when prin...

Страница 114: ...press Action Press 2nd then alarm 1 1 PH LIMIT HI The current high alarm limit for MEASUREMENT the mode and channel is displayed Change as desired then press yes 2 1 PH LIMIT LO The current low alarm...

Страница 115: ...e will provide temperature compensated concentration measurements when using the direct measurement technique To change an isopotential point follow the keypress prompt sequence below Always recalibra...

Страница 116: ...A CLEARED will be displayed The meter then displays the next option in the menu AUTOSHUTOFF NOTE Prior to using the datalogger for the very first time it will be necessary to clear datalogger memory w...

Страница 117: ...n switch on the Orion 607 Press 2nd then channel 5 on the Orion 920Aplus until the desired channel is selected on both the instrument and switchbox Use of a switchbox must be identified in the options...

Страница 118: ...Orion Benchtop pH ISE Meter Instruction Manual Overview of Meter Functions 520Aplus 525Aplus 720Aplus and 920Aplus 114...

Страница 119: ...off beep on autoshutoff on timer interval 5 seconds print mode 1 manual print print interval 1 minute datalog mode 0 off 520Aplus 525Aplus 710Aplus 720Aplus and 920Aplus measurement channel Channel 1...

Страница 120: ...Orion Benchtop pH ISE Meter Instruction Manual 116...

Страница 121: ...to the four line segments that connect the data Concentration or pH values for samples are calculated according to which segment their potential values fall into Those above or below the range of cali...

Страница 122: ...Orion Benchtop pH ISE Meter Instruction Manual 118...

Страница 123: ...h the lowest three points of the multipoint calibration and extrapolating to zero concentration based on the assumption of Nernstian electrode behavior Multipoint calibrations at the lower limit of de...

Страница 124: ...the three potentials E1 E2 and E3 and the three concentrations C1 C2 and C3 If the relationships indicate that blank correction is desired a blank will automatically be calculated and the non lineari...

Страница 125: ...the calibration data is handled by the multipoint calibration method described earlier NOTE When a calibration standard is defined as zero and the meter cannot calculate a blank the operator assistan...

Страница 126: ...Orion Benchtop pH ISE Meter Instruction Manual 122...

Страница 127: ...and T is the temperature in degrees Kelvin Examples of calibration curves at varying temperatures are shown in Figure below These curves intersect at the isopotential point which is the concentration...

Страница 128: ...f each standard at 75 C 4 Measure the millivolt value of each standard at 10 C 5 On semi logarithmic graph paper plot the concentration values on the log axis versus the millivolt values on the linear...

Страница 129: ...whichever is greater of readings whichever is greater of reading whichever is greater display Custom LCD Custom LCD Custom 2 color Custom 2 color vacuum fluorescent vacuum fluorescent with17 character...

Страница 130: ...mV relative accuracy 0 2 mV or 0 05 0 2 mV or 0 05 0 2 mV or 0 05 of reading whichever is greater of readings whichever is greater of reading whichever is greater display Custom LCD Custom 2 color Cus...

Страница 131: ...31 Europe 12 16 Sedgeway Business Park Witchford Cambridgeshire England CB6 2HY Tel 44 1353 666111 Fax 44 1353 666001 Far East Room 904 Federal Building 369 Lockhart Road Wanchai Hong Kong Tel 852 283...

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