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Myron L TechPro II, Руководство по эксплуатации

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Myron L TechPro II Скачать руководство пользователя страница 26

22

Symptom

No display, even

though measurement

key pressed

Inaccurate pH readings

(TPH1)

No response to

pH changes  (TPH1)

Will not adjust down

to pH 7  (TPH1)

pH readings drift or

respond slowly to

changes in buffers/

samples  (TPH1)

or

“FAC” is displayed 

repeatedly  (TPH1)

Unstable 

Conductivity/TDS 

readings

Unable to calibrate 

Conductivity/TDS

Possible Cause

               

Battery weak or not connected

1. pH calibration needed (ref. pH Cal, pg. 12). 

2. Cross-contamination from residual pH

    buffers or samples in sensor well.

          

3. Calibration with expired pH buffers.

Sensor bulb is cracked or there is an

electromechanical short caused by an

internal crack.

pH sensor has lost KCl.

1. Temporary condition due to “memory”

    of solution in pH sensor well for long

    periods

2. Bulb dirty or dried out

3. Reference junction is clogged or coated.

Dirty electrodes

             

Film or deposits on electrodes

XV. 

TROUBLESHOOTING CHART

Содержание TechPro II

Страница 1: ...18 February 16 TECHPRO Operation Manual MODELS TPH1 TP1...

Страница 2: ......

Страница 3: ...n instrument on Measure parameter Exit any function Icons for pH Conductivity or Total Dissolved Solids TDS pH Glass Electrode pH Sensor User replaceable Reference Junction Under Glass Bulb Conductivi...

Страница 4: ...ii...

Страница 5: ...tivity and TDS require mathematical correction to 25 C values ref Temperature Compensation pg 25 On the left of the TechPro II s liquid crystal display is shown an indicator of the salt solution chara...

Страница 6: ...lectable solution conversions tempcos TPH1 TP1 User Selectable Salinity units TPH1 TP1 Temperature accuracy of 0 1 C F Automatic Temperature Compensation to 25 C Temperature Compensation disable featu...

Страница 7: ...instrument prepaid to the Myron L Company Myron L COMPANY 2450 Impala Drive Carlsbad CA 92010 7226 USA 1 760 438 2021 E Mail info myronl com techquestions myronl com www myronl com If intheopinionoft...

Страница 8: ...Sensor TPH1 8 V SPECIFIC RECOMMENDED MEASURING PROCEDURES 8 A Measuring Conductivity Total Dissolved Solids 8 B Measuring pH TPH1 8 VI SOLUTION SELECTION TPH1 TP1 9 A Why Solution Selection is Availa...

Страница 9: ...Storage Solution TPH1 24 D Soft Protective Case 25 E Hard Protective Carry Cases 25 F Replacement pH Sensor TPH1 25 XVII TEMPERATURE COMPENSATION TPH1 TP1 25 A Standardized to 25 C 25 B Tempco Variati...

Страница 10: ...of inactivity the instrument turns itself off 60 seconds in CAL mode Rarely is it necessary to press and hold a key as in Procedure to Select a Solution pg 9 or Cond or TDS Calibration pg 11 C Operat...

Страница 11: ...displayed 4 CAL MCLR Key A press of allows you to enter the calibration mode while measuring conductivity TDS or pH Once in CAL mode a press of this key accepts the new value If no more calibration op...

Страница 12: ...water ref pH pg 20 V SPECIFIC RECOMMENDED MEASURING PROCEDURES Verify proper solution setting KCl NaCl or 442 ref Solution Selection pg 9 NOTE After sampling high concentration solutions or temperatur...

Страница 13: ...rally usingKClforconductivity and442 NaturalWatercharacteristic forTDS will reflect present industry practice for standardization This is how your instrument is shipped from the factory ref Solution C...

Страница 14: ...asuring Conductivity TDS or pH Measuring continues but the CAL icon is on indicating calibration is now changeable The reading is changed with the and keys to match the known value The calibration for...

Страница 15: ...need to calibrate so far out that FAC appears indicates a procedural problem incorrect standard solution a very dirty cell cup or an aging pH sensor ref Troubleshooting Chart pg 22 C Calibration Proc...

Страница 16: ...procedure a Press or b Press c Press key until FAC appears and release d Press to accept the factory calibration setting 3 pH Calibration TPH1 Important Always zero your TechPro II with a pH 7 buffer...

Страница 17: ...to accept the preset factory value or you may reduce your variation from factory setting by pressing or 6 Press to accept the new value The pH Zero Calibration is now complete You may continue with pH...

Страница 18: ...Again match the display to the known buffer value as in step 2 and continue with the following steps 7 Repeat steps 3 through 5 using opposite buffer solution 8 Press to accept 3rd point of calibrati...

Страница 19: ...ate with solutions close to the measurements you make Readings are compensated for temperature based on the type of solution If you choose to measure tap water with a KCl compensation which is often d...

Страница 20: ...es between temperature recorded and location number 4 Press any measurement key to leave memory recall or allow to automatically turn off C Clearing a Record Memory Clear After recalling a certain rec...

Страница 21: ...cleared X TEMPERATURE FORMAT Centigrade Fahrenheit 1 Press any measurement key 2 Press repeatedly until either C or F is displayed see Figures 8 and 9 3 Press to switch units 4 Press any measurement k...

Страница 22: ...raphy to describe the concentration of dissolved salts in seawater It is defined in terms of electrical conductivity relative to a standard solution of KCl When expressed in units of parts per thousan...

Страница 23: ...TOTAL RETURN to FACTORY SETTINGS FAC SEL There may come a time when it would be desirable to quickly reset all the recorded calibration values in the instrument back to the factory settings This might...

Страница 24: ...of your instrument to ensure receipt of the proper type Complete installation instructions are provided with each replacement sensor D Cleaning Sensors 1 Conductivity or TDS The cell cup should be kep...

Страница 25: ...ng high pH alkaline solutions in contact with the pH sensor for long periods of time is harmful and will cause damage Rinsing such liquids from the pH sensor well and refilling it with Myron L pH Sens...

Страница 26: ...ssible Cause Battery weak or not connected 1 pH calibration needed ref pH Cal pg 12 2 Cross contamination from residual pH buffers or samples in sensor well 3 Calibration with expired pH buffers Senso...

Страница 27: ...ref pH Sensor Replacement pg 20 Clean and rejuvenate sensor ref Cleaning Sensors pg 20 and recalibrate If no improvement replace pH sensor ref pH Sensor Replacement pg 20 Clean and rejuvenate sensor...

Страница 28: ...eshwater This salt ratio has conductivity characteristics approximating fresh natural waters and was developed by the Myron L Company over four decades ago It is used around the world for measuring bo...

Страница 29: ...dized to 25 C Conductivity is measured with great accuracy in the TechPro II using a method that ignores fill level electrolysis electrode characteristics etc and features a unique circuit to perform...

Страница 30: ...indicates the solution is reading 16 8 low For correction dividing by 832 yields 1082 microsiemens as a compensated reading A KCl correction of 10 degrees below 25 x 1 9 indicates the solution is rea...

Страница 31: ...solutions are not at all similar to KCl NaCl or 442 A sugar solution or a silicate or a calcium salt at a high or low temperature may require a value peculiar to the application to provide readings cl...

Страница 32: ...to measure a wide range of materials and mixtures of electrolyte solutions To address this problem industrial users commonly use the characteristics of a standard material as a model for their solutio...

Страница 33: ...olution Selection determines the characteristic assumed as the instrument reports what a measured conductivity would be if it were at 25 C The characteristic is represented by the tempco expressed in...

Страница 34: ...9 mol liter of H would have 100 times less H ions than OH ions and be called an alkaline solution of pH 9 C pH Sensor TPH1 The active part of the pH sensor is a thin glass surface that is selectively...

Страница 35: ...s of Error TPH1 The basics are presented in pH pg 20 1 Reference Junction The most common sensor problem will be a clogged junction because a sensor was allowed to dry out The symptom is a drift in th...

Страница 36: ...he Myron L Company to see if a software upgrade is available 1 Press any measurement key 2 Press key until three numbers are displayed as shown in Figure 17 3 Press any measurement key instrument will...

Страница 37: ...erature Compensation and TDS Derivation pg 28 Logarithm An arithmetic function See pH Units pg 30 TDS Total Dissolved Solids or the Total Conductive Ions in a solution See Conductivity Conversion to T...

Страница 38: ...34 XXIII ADDENDUM...

Страница 39: ...35...

Страница 40: ...36 XXIV NOTES...

Страница 41: ...37...

Страница 42: ...38...

Страница 43: ......

Страница 44: ...Myron L COMPANY 2450 Impala Drive Carlsbad CA 92010 7226 USA Tel 1 760 438 2021 Fax 1 760 931 9189 E Mail info myronl com techquestions myronl com www myronl com Made In USA TPIIOM 18FE16...

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