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model 525

yes

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2nd

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calibrate

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Benchtop pH/ISE Meter Instruction Manual

Set Up, Self-Test and Check-Out

D. Models 520Aplus and 525Aplus Set Up and Self-Test

NOTE: Use this procedure when the instrument is
first received and whenever troubleshooting
becomes necessary.

1. Connect BNC shorting cap (Thermo Orion Catalog No. 090045)

supplied with meter to all sensing electrode input(s).

2. Disconnect the ATC probe.

3. Plug line adapter (Thermo Orion Catalog No. 020125 for 110V,

Thermo Orion Catalog No. 020130 for 220V) into an appropriate wall
outlet then securely into meter power receptacle.

NOTE: Firmly push the power adapter into the jack
on the back of the meter.

4. Hold yes while plugging in the line adapter into meter. The instrument

automatically performs electronic and hardware diagnostic tests. See
the explanation in the Self-Test Section of the troubleshooting guide
for a more detailed explanation.

a. When “press all keys” appears in the lower field, press each key

one at a time. A numeric digit will be displayed for
each keypress.

b. During TEST 8, the meter will turn off, then back on.
c. After completion of the self-test, proceed to the

Check-Out Procedure.

Figure #3 Front Panel Model 525Aplus

Содержание 410Aplus

Страница 1: ...Benchtop pH and pH ISE Meters Models 410Aplus 420Aplus 520Aplus 525Aplus 710Aplus 720Aplus 920Aplus INSTRUCTION MANUAL...

Страница 2: ...olled and feature pH autocalibration sealed keypads simultaneous temperature display and many other features The Models 410Aplus 420Aplus and 710Aplus feature a custom LCD display The Models 520Aplus...

Страница 3: ...2 Benchtop pH ISE Meter Instruction Manual...

Страница 4: ...and 3 an RS232 port for use with the Thermo Orion 900A printer or other serial peripheral devices Models 520Aplus 525Aplus 720Aplus 920Aplus General Information The Model 520Aplus is a pH mV Temperatu...

Страница 5: ...ct BNC shorting cap Thermo Orion Catalog No 090045 supplied with meter to sensing electrode input 2 Disconnect the ATC probe 3 Plug line Thermo Orion Catalog No 020125 for 110V Thermo Orion Catalog No...

Страница 6: ...ion Catalog No 090045 supplied with meter to sensing electrode input 2 Disconnect the ATC probe 3 Plug line adapter Thermo Orion Catalog No 020125 for 110V Thermo Orion Catalog No 020130 for 220V into...

Страница 7: ...ay reads 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 firs...

Страница 8: ...dicator 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 the d...

Страница 9: ...Plug line adapter Thermo Orion Catalog No 020125 for 110V Thermo Orion Catalog No 020130 for 220V into an appropriate wall outlet then securely into meter power receptacle NOTE Firmly push the power...

Страница 10: ...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 the...

Страница 11: ...t s 2 Disconnect the ATC probe 3 Plug line adapter Thermo Orion Catalog No 020125 for 110V Thermo Orion Catalog No 020130 for 220V into an appropriate wall outlet then securely into meter power recept...

Страница 12: ...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 disp...

Страница 13: ...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 a...

Страница 14: ...ors 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 for Kar...

Страница 15: ...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 ele...

Страница 16: ...f 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 displa...

Страница 17: ...orrected pH results in the main display For Manual Temperature Compensation with Models 520Aplus 525Aplus 720Aplus and 920Aplus disconnect the temperature probe Temperature values can be entered manua...

Страница 18: ...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 calibra...

Страница 19: ...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 in...

Страница 20: ...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 greater...

Страница 21: ...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 the...

Страница 22: ...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 calibrate...

Страница 23: ...ur 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 selecte...

Страница 24: ...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 00 1...

Страница 25: ...a 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 elec...

Страница 26: ...o 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 sa...

Страница 27: ...ess 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 th...

Страница 28: ...ys 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 or...

Страница 29: ...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 repea...

Страница 30: ...lays 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 or 1...

Страница 31: ...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 elec...

Страница 32: ...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 in...

Страница 33: ...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 calibr...

Страница 34: ...l 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 po...

Страница 35: ...ration 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 value...

Страница 36: ...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 identificatio...

Страница 37: ...table 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 8...

Страница 38: ...y 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 correct s...

Страница 39: ...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 If...

Страница 40: ...hosen 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 electrode...

Страница 41: ...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 yes 1...

Страница 42: ...rode instruction manual Single Incremental Techniques Single incremental techniques are useful for occasional samples or samples with complex matrices Another advantage of the single incremental techn...

Страница 43: ...ruction 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 approxima...

Страница 44: ...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 is...

Страница 45: ...ectrode 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 must...

Страница 46: ...r 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 th...

Страница 47: ...andard 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 for...

Страница 48: ...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 The...

Страница 49: ...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 del...

Страница 50: ...bsolute 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 Milliv...

Страница 51: ...ayed 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 19...

Страница 52: ...odes Perform the following steps 1 Securely connect electrode s to input 1 or 2 2 For Model 920Aplus only a Identify the electrode type as REDOX Press 2nd then electrode id b Select 25 redox then pres...

Страница 53: ...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 ensu...

Страница 54: ...o 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 sure...

Страница 55: ...nected to the meter 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 2...

Страница 56: ...ottle 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 electrode...

Страница 57: ...ding of 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 int...

Страница 58: ...adapter Thermo Orion Catalog Number 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...

Страница 59: ...r serial peripheral devices Thermo Orion provides a cable Cat No 0ACBL0 for interfacing your meter to an IBM PC or compatible device For other computers and communication devices a suitable cable must...

Страница 60: ...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 61: ...puter 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 exit...

Страница 62: ...it 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 F...

Страница 63: ...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 Ac...

Страница 64: ...sure 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 sl...

Страница 65: ...UT 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 THE...

Страница 66: ...o 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 switchbo...

Страница 67: ...e low side of the recorder A Switchcraft type 850 or equivalent phone plug is suggested F Use with DataCOLLECT DataCOLLECT can be used with Models 520Aplus 525Aplus 720Aplus and 920Aplus DataCOLLECT i...

Страница 68: ...10Aplus 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...

Страница 69: ...0Aplus 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 Models 420Aplus and 710Aplus and ERROR 7 for Models 520Aplus 525Aplus...

Страница 70: ...rror 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 make sure the...

Страница 71: ...sure 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...

Страница 72: ...esh 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 full a...

Страница 73: ...the pin configuration of the meter Use Thermo Orion Cat No 0ACBL0 for IBM PC or compatible devices E 28 Incremental The concentration of the unknown Techniques cannot be calculated This can occur 920A...

Страница 74: ...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 select...

Страница 75: ...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 calibration...

Страница 76: ...the Autoshutoff be turned on feature is on the meter will automatically shut down if no keys have been pressed within 10 minutes For Models 410Aplus 420Aplus and 710Aplus press the power key to turn t...

Страница 77: ...ocalibration 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 Models 420Aplus Locks 71...

Страница 78: ...or Thermo Orion 500 Cummings Center Beverly MA 01915 6199 USA Tel 978 232 6000 Dom Fax 978 232 6015 Int l Fax 978 232 6031 Thermo Orion Europe 12 16 Sedgeway Business Park Witchford Cambridgeshire Eng...

Страница 79: ...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 meas...

Страница 80: ...3 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 Emissions Class A FC...

Страница 81: ...80 Benchtop pH ISE Meter Instruction Manual Certificate of Conformity...

Страница 82: ...nforming to this warranty There may be additional charges including freight for warranty service performed in some countries For service call Thermo Orion or its authorized dealer outside the United S...

Страница 83: ...iode Cat Nos 616600 and 617900 Model 97 08 DO Probe Series 100 Conventional Conductivity Cells temperature probes and compensators except those models noted are warranted to be free from defects in ma...

Страница 84: ...ance procedures in the instruction manual and when not having been subjected to accident alteration misuse or abuse Waterproof meters Models 630 635 830A 835A 260A 261S 265A 266S 130A 131S 135A 136S 1...

Страница 85: ...NT OF THE NON CONFORMING PRODUCT OR PART THEREOF OR REFUND OF THE PURCHASE PRICE BUT IN NO EVENT SHALL ORION ITS CONTRACTORS AND SUPPLIERS OF ANY TIER BE LIABLE TO THE BUYER OR ANY PERSON FOR ANY SPEC...

Страница 86: ...de 3 in 1 combination pH ATC probe 110V wall adapter benchtop meter starter kit OBCHSK 0525A0 Model 525Aplus pH mV Temperature Meter with custom vacuum fluorescent display 110V Includes Thermo Orion c...

Страница 87: ...e each of pH 4 pH 7 and pH 10 buffer solution and one 475 mL bottle of electrode storage solution 0900A0 Portable Printer for Thermo Orion Meters Includes Rechargeable battery and one roll of printer...

Страница 88: ...fer Solution 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 p...

Страница 89: ...Benchtop pH ISE Meter Instruction Manual Ordering Information 88...

Страница 90: ...rees 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...

Страница 91: ...Aplus 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 t...

Страница 92: ...temperature 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...

Страница 93: ...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 off i...

Страница 94: ...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 sample...

Страница 95: ...tion sequence is completed Set up menu for Models 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 m...

Страница 96: ...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 minu...

Страница 97: ...e maximum 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 settin...

Страница 98: ...olts 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 mi...

Страница 99: ...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 time W...

Страница 100: ...inutes 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 Wh...

Страница 101: ...Benchtop pH ISE Meter Instruction Manual Overview of Meter Functions 420Aplus 710Aplus 100...

Страница 102: ...ic keys Press to 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 model 920 yes...

Страница 103: ...int calibrations See the Model 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 the s...

Страница 104: ...oth 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 resolution 5...

Страница 105: ...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 the...

Страница 106: ...ain 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 pre...

Страница 107: ...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 for...

Страница 108: ...es 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 ver...

Страница 109: ...r 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 Ent...

Страница 110: ...e 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 print i...

Страница 111: ...ss 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 lim...

Страница 112: ...ill provide temperature compensated concentration measurements when using the direct measurement technique To change an isopotential point follow the keypress prompt sequence below Always recalibrate...

Страница 113: ...LEARED 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 with...

Страница 114: ...ction switch on the Model 607 Press 2nd then channel 5 on the Model 920Aplus until the desired channel is selected on both the instrument and switchbox Use of a switchbox must be identified in the opt...

Страница 115: ...Benchtop pH ISE Meter Instruction Manual Overview of Meter Functions 520Aplus 525Aplus 720Aplus and 920Aplus 114...

Страница 116: ...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 1 525...

Страница 117: ...Benchtop pH ISE Meter Instruction Manual Meter Default 116...

Страница 118: ...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 calibra...

Страница 119: ...Benchtop pH ISE Meter Instruction Manual Multipoint Calibration Curve 118...

Страница 120: ...he 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 detec...

Страница 121: ...e 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 linearity...

Страница 122: ...e 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 assistance...

Страница 123: ...Benchtop pH ISE Meter Instruction Manual Automatic Blank Correction 122...

Страница 124: ...d 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 at...

Страница 125: ...ach 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 ax...

Страница 126: ...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 127: ...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 128: ...ink ROSS ROSS Resolution SAOB Stacked Stat Face The Enhanced Lab ThermaSense Triode TRIUMpH Unbreakable pH Universal Access are trademarks of Thermo Orion Guaranteed Success and The Technical Edge are...

Страница 129: ...eway Business Park Witchford Cambridgeshire England CB6 2HY Tel 44 1353 666111 Fax 44 1353 666001 Thermo Orion Far East Room 904 Federal Building 369 Lockhart Road Wanchai Hong Kong Tel 852 2836 0981...

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