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Digital Dissolved Oxygen, Conductivity, TDS and pH Meter

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1. 85mS cm and 111 3 mS cm The DO700 offers a unique one point calibration feature The user can select the calibration solution closest to the expected measuremnt value In general the most common calibration solution is 1413 Ju S cm Use the supplied conductivity electrode K 1 cm 1 and perform the calibration using the supplied 1413 pu S cm calibration solution The meter can then be used for measurements below 100 mS cm Please refer to the chart below 11 DO700 EU EN V2 1 5 11 0 05 to 20uS cm 0 5uS cm to 200mS cm Calibration solution 8 84uS cm 14130 S cm 12 88 mS cm 111 9 mS cm 4uS cm Calibration indicator D There are two electrode calibration methods Standard Solution calibration and Constant calibration The calibration described above in the section Calibration refers to the Standard Solution method the most accurate calibration method assuming the calibration buffer standard is accurate and fresh To select the Constant calibration method use Parameter P5 described below in the Programming Parameters Conductivity section The temperature compensation coefficient of the meter setting is 2 0 However the conductivity temperature coefficient is different for solutions of a different variety and concentration Use the chart below for common solution types use Parameter P4 as described below in the Programming Parameters Conductivity section The meter can perform an automatic non linear temperature compensati
2. P6 or press ENTER to return to the normal measurement mode Parameter P6 Temperature units of measure 1 From the P6 menu use the CAL or the M RM keys to select the desired unit of measure C or F 2 Momentarily press MODE to move to the next parameter P7 or press ENTER to return to the normal measurement mode Parameter P7 Display Backlight Setting 1 From the P7 menu use the CAL or the M RM keys to select 0 1 3 or 6 minute default backlighting time 2 Momentarily press MODE to move to the next parameter P8 or press ENTER to return to the normal measurement mode Parameter P8 Automatic Power OFF Setting 1 From the P8 menu use the CAL or the M RM keys to select a 0 10 or 20 minute Auto Power OFF time 2 Momentarily press MODE to move to the next parameter P9 or press ENTER to return to the normal measurement mode Parameter P9 Restore Factory Default Settings 1 From the P9 menu use the CAL or the M RM keys to select ON reset the factory default settings or OFF cancel edit Note that the instant the ON selection is made the meter will revert to its factory default state and all user settings will be cleared Only select ON if absolutely necessary 2 Momentarily press MODE to move to the first parameter P1 or press ENTER to return to the normal measurement mode 14 DO700 EU EN V2 1 5 11 Conductivity Measurement Calibration and Maintenance Considerations The meter and probe are calibrated
3. anaerobic water and press the CAL key to enter the calibration mode When the displayed value is lt 0 15mg L x5min press the ENTER key 4 Ifthe displayed value is x0 02mg L within 5 minutes this indicates that the response time and the residual current are normal and there is no need to perform the zero oxygen calibration press the ENTER key to the normal operating mode 5 Ifthe displayed value is gt 0 15 mg L after 5 minutes this indicates that the response time of the meter is too slow and there is too much residual current In this case replace the membrane cap or remove the membrane cap and use the supplied polishing paper to lightly wipe the gold plane s cathode the surface along the gold polished arc and clean the surface of the cathode with a soft cloth or tissue Clean the electrode with distilled water and shake off the excess water Add some electrolyte to the membrane cap re assemble and then perform a full scale and a zero oxygen calibration Salinity Calibration Under normal circumstances a salinity calibration is not required The meter is equipped with an automatic salinity compensation In addition a salinity calibration has been performed at the factory prior to shipment however a salinity calibration is required when the electrode is replaced or has been in service for a relatively extended period of time Refer to parameter P2 in previous section for calibration procedure Barometric Pressure Setting The m
4. before leaving the factory the user can take measurements immediately upon receiving the unit The recommend calibration period is once per month under normal circumstances It is necessary to calibrate a newly purchased conductivity electrode or one that has been in service for a long period of time Keep the conductivity electrode clean It s best to rinse electrodes with the sample solution The surface of the supplied conductivity electrode is plated with a layer of platinum black in order to lower the electrode polarization and increase the measuring range Do not polish the black platinum surface clean it by stirring in Distilled water If excessive organic buildup appears on the black platinum coating clean with hot water and detergent or with alcohol Replace the electrode if the above cleaning methods are ineffective Reset the meter to its factory default settings Parameter P9 if unusual operation is noticed If the reset process does not solve the issue return the unit for an evaluation 15 DO700 EU EN V2 1 5 11 Dissolved Oxygen DO Measurements Preparation Remove the DO electrode from the solution bottle Determine if the sponge inside the bottle is moist If not moisten the sponge but do not allow excess water in the bottle Small air bubbles are acceptable in the electrode but larger air bubbles should be removed To do so remove the membrane cap and add electrolyte Connect the electrode to the meter and a
5. if a sample sticks to the electrode Use a solvent if the solution does not appear clean after washing Electrodes that have been used over a long period of time used in a strong solution that has damaged the sensitive bulb or used with a substance resulting in a jam at the junction will be become passivated the sensitivity will decrease its response will slow and the readings will be inaccurate Replace the electrode as soon as possible in these cases For abnormal readings try calibrating again if the problem persists replace the Electrode The user can also try resetting the meter to factory default conditions per Parameter P7 detailed in an earlier section Electrode life can be shortened by heavy use extreme conditions and improper maintenance 9 DO700 EU EN V2 1 5 11 mV Measurement Mode 1 Unscrew the protective cap on the probe jack located on the bottom of the meter store the protective cap in the carrying case for later use Carefully connect the pH probe to the meter s probe jack The probe can only be inserted in one orientation Once it is firmly connected screw the probe collar onto the meter to secure the probe Turn the meter on using the power key Press the MODE key momentarily to switch to the mV mode Immerse the electrode in the sample solution slowly stir the solution with the electrode and then allow it to rest in the solution When the smile face icon appears on the LCD the reading has st
6. selection e Press the MODE key to enter the P1 parameter mode e Use the CAL key to select the resolution 0 01 0 1 e Press the MODE key to enter into the next parameter setting or press ENTER to return to the normal measurement mode P2 Salinity Auto Compensation e From the P1 parameter press the MODE key to enter P2 e Immerse the DO electrode in the 12 88mS cm calibration solution the solution level should cover the electrode After stirring allow the electrode to rest in the solution and press the CAL key When the value stabilizes the smile face icon appears on the LCD along with a flashing 12 9 The calibration will finish after several minutes and will display a stable value e Press the MODE key to enter the next parameter or press ENTER to confirm and return to the measuring mode P3 Manual Barometric Pressure setting e From P2 press the MODE key to enter P3 the LCD will display the current barometric pressure value unit of measure is kPa for example 101 3kPa e Use the CAL or RM key to change the setting refer to the standard Barometric pressure table Press and hold CAL or RM to quickly scroll the value e Press MODE to move to the next parameter or press ENTER to confirm and return to the measuring mode 18 DO700 EU EN V2 1 5 11 P4 Temperature unit of measure selection Use the CAL or the M RM keys to select the desired unit of measure C or F e Momentarily press MODE to mov
7. temperature The soaking solution contained in the supplied protective bottle is used to maintain activation in the glass bulb and junction Loosen the capsule remove the electrode and rinse in distilled water before taking a measurement Insert the electrode and tighten the capsule after measurements to prevent the solution from leaking If the soak solution is turbid or moldy replace the solution To prepare a soak solution Use 25g pure KCL dissolved with purified water and diluted to 100mL The electrode should not be soaked in a distilled water protein solution or an acid fluoride solution for long periods of time In addition do not soak the electrode in organic silicon lipids For calibration accuracy the pH of the standard buffer solution must be reliable The buffer solution should be refreshed often especially after heavy use For best accuracy always keep the meter clean and dry especially the meter s electrode and electrode jack Clean with medical cotton and alcohol if necessary The sensitive glass bulb at the front of the combination electrode should not come in contact with hard surfaces Scratches or cracks on the electrode will cause inaccurate readings Before and after each measurement the electrode should be washed with distilled water and dried Do not clean the glass bulb with a tissue for it will affect the stability of the electrode potential and increase the response time The electrode should be thoroughly cleaned
8. 8 Rinse the probe in distilled water again allow it to dry and submerge it into a pH 10 01 buffer solution Stir the solution briefly and allow it to stay in the buffer solution until a stable reading is reached 9 Press CAL again and the display will show a blinking 10 01 10 After the display stabilizes the 3 point calibration icon will appear 1 Point and 2 Point Calibration A one or two point calibration is acceptable if the expected measurement result is known For example if the expeced pH is 4pH it is acceptable to perform only a 1 Point Calibration 4pH If the expected measurement is between 4 00pH and 7 00pH the user can perform a 2 Point Calibration 4 00 and 7 00pH and so on For a 4pH calibration only the circled L will appear on the LCD For a 7 00pH only the circled M will appear on the LCD For a 10 01pH Calibration only the circled H will appear Low Medium and High For all other applications a 3 Point Calibration is recommended Always perform a 3 Point Calibration on new probes and probes that have been in use for long periods This maximizes measurement slope linearity Press the ENTER key to exit the Calibration mode 6 DO700 EU EN V2 1 5 11 Testing the pH of a Sample 1 2 di 4 Perform the pH Calibratoin as described above Rinse and dry the pH Probe and submerge it in a sample liquid Stir the solution briefly with the probe and allow it to stand until the display stabilizes Note t
9. FE 3 ESAE DE IOSE AE 35 NE 8E 2 3A 2500 762 9254 65 754 10000 3949 7047 E X 5 71 Copyright O 2011 Extech Instruments Corporation a FLIR company All rights reserved including the right of reproduction in whole or in part in any form www extech com 25 DO700 EU EN V2 1 5 11
10. H mv DO COND RES TDS SAL 6 Stable measurement icon 7 Calibration icons _f Li i li r1 USMQ 4 8 Low battery icon a i 1 li li I li mSKQ e aum o auum e au ppmg L 4 Keypad Description ON OFF Power Key Calibration Key a When taking a measurement press this key to enter the calibration mode b When in the programming mode press this key to change the displayed number or the ON OFF state Mode Key a In pH measuring mode one short press switches between pH and mV measuring modes One long press 22s enters the parameter setting mode Subsequent presses will scroll through the available parameters b In other measuring modes press to enter the parameter setting modes The meter will scroll through the available parameters Backlight and ENTER Key a In the measurement mode momentary presses toggle the backlight on and off b When in the programming or calibration mode press to ENTER data c When in the pH mode press and hold to change the resolution 0 01 to 0 1pH d When in the Conductivity mode press and hold to scroll through the TDS Salinity Resistivity and Conductivity modes e When in DO mode press and hold to select the unit of measure mg L gt ppm gt 9 Release the key when the desired unit is displayed MEMORY STORE and RECALL Key a In the measurement mode momentary presses store the displayed readings Press and hold for at least 2 seconds to recall a saved r
11. User s Guide EXT INSTRUMENTS A FLIR COMPANY Digital Dissolved Oxygen Conductivity TDS and pH Meter Model DO700 Introduction Congratulations on your purchase of the Extech DO700 meter For best results please read the entire manual before use The DO700 measures Dissolved Oxygen DO Conductivity pH mV and temperature parameters Conductivity measurements also yield TDS total dissolved solids Salinity and Resistivity readings The built in microprocessor provides automatic calibration automatic temperature compensation data storage and self diagnostics The digital filter improves measurement speed and accuracy The meter offers a backlit LCD display and is dust proof and waterproof meeting IP57 This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service pH Features The meter can recognize up to 13 types of pH standard buffer solutions Two special pH modes for distilled water and distilled water mixed with ammonia are provided These special modes offer general slope compensation and non linearity solution temperature compensation suitable for the electric power and petrochemical industries Conductivity Features Automatic frequency conversion and voltage regulation increases the Conductivity electrode range K 1 to 10 times One point Conductivity calibration allows measurements from O to 100mS cm Up to 8 types of Conductivity standards can
12. abilized mV Programming Parameters oie RE Om Back light display time bL 0 1 3 6 min ENIM Auto power off time RC 0 10 20 min Parameter P1 Display Backlight Setting Press MODE to access the P1 Parameter Use the CAL or the M RM keys to select 0 1 3 or 6 minute default backlighting time Momentarily press MODE to move to the next parameter P2 or press ENTER to return to the normal measurement mode Parameter P2 Automatic Power OFF Setting 1 From the P2 menu use the CAL or the M RM keys to select a 0 10 or 20 minute Auto Power OFF time Momentarily press MODE to move back to Parameter P1 or press ENTER to return to the normal measurement mode 10 DO700 EU EN V2 1 5 11 Conductivity Measurement Mode Preparation for Measurement 1 Unscrew the protective cap on the probe jack located on the bottom of the meter store the protective cap in the carrying case for later use 2 Carefully connect the electrode to the meter s input jack The electrode can only be inserted in one orientation Once it is firmly connected screw the electrode collar onto the meter to secure it 3 Turn the meter on using the power key 9 Press and hold the ENTER key to select the desired mode Conductivity TDS Total Dissolved Solids Salinity or Resistivity Calibration 1 Press the CAL key and CAL will appear flashing on the LCD 2 Clean and dry the conductivity electrode use distilled water to clean 3 Immer
13. be recognized The meter has an automatic range feature with non linear temperature compensation for distilled water with Conductivity values lower than 10uS cm greatly improving accuracy and suitable for the microelectronics and pharmaceutical industries Dissolved Oxygen Features The latest technology DO electrode offers a temperature and salinity sensor with automatic temperature compensation and automatic salinity compensation as well as manual barometric pressure compensation 2 DO700 EU EN V2 1 5 11 Supplied Equipment List DO700 Meter Dissolved Oxygen Conductivity and pH Electrode Standard pH buffer solutions 4 00pH 7 00pH and 10 01pH 50ml Standard Conductivity solution 1413yuS cm 50ml Standard Dissolved Oxygen solution 30ml Dissolved Oxygen Membrane cap for DO electrode Cathode polishing paper Screwdriver for removing battery compartment cover Batteries 2 x AA 1 5V User s Guide Carrying Case Meter Description p ur x amp Im LCD Display detailed in section below Rubber protective jacket remove to access the rear battery compartment Keypad detailed in section below Electrode connection jack Electrode plug Electrode cable 3 DO700 EU EN V2 1 5 11 Display Description 1 Measurement type icons 2 Measured reading 3 888 Stored data serial number M measurement to be stored icon RM reading to be recalled icon 4 Units of measure 5 Temperature reading P
14. d cover the electrode s thermistor temperature sensor The recommended electrode orientation with regard to the water is a 45 to 75 angle Move the electrode around in the water and allow 3 to 5 minutes to take the reading e To measure in static water Insert the DO electrode into water water surface should cover the location of the electrode s thermistor temperature sensor the direction for the electrode with respect to the water is a 45 to 75 angle Quickly stir the electrode in water at a speed gt 5cm s Allow 3 to 5 minutes while taking the reading e To test in slower flowing water Use the first method above but stir the electrode faster in the water Dissolved Oxygen Measurement and Calibration Considerations e The air temperature and water temperature should be within 10 degrees C if the temperature difference is greater please immerse the electrode in the sample water for 10 minutes and then calibrate e After each start up the electrode must be polarized and a calibration must be performed do not turn the meter OFF when in the DO mode the default auto power off time is zero e During DO tests the temperature affects the measurement greatly The electrode s thermistor should come in direct contact with the water sample Please allow 3 to 5 minutes for the thermistor to gage a stable temperature measurement e DO measurements are also greatly affected by Barometric pressure The DO700 meter has an automatic Ba
15. e pH probe to the meter s probe jack The probe can only be inserted in one orientation Once it is firmly connected screw the probe collar onto the meter to secure the probe 3 Turn the meter on using the power key Press the MODE key momentarily to switch to the pH mode only if the meter is in the mV mode Otherwise the unit of measure should already display pH units 3 Point Calibration 7 00pH 4 00pH and 10 01pH 1 Press the CAL key to enter the Calibration mode The meter s display will show a blinking C1 2 Rinse the probe in distilled water allow it to dry and submerge it into a pH 7 00 buffer solution Stir the solution briefly and allow it to stay in the buffer solution until a stable reading is reached 3 Press CAL again and the display will show a blinking 7 00 This portion of the calibration procedure is complete when the display stops blinking and shows the C2 icon The unit will automatically switch to the second point of the calibration 5 Rinse the probe in distilled water again allow it to dry and submerge it into a pH 4 00 buffer solution Stir the solution briefly and allow it to stay in the buffer solution until a stable reading is reached Press CAL again and the display will show a blinking 4 00 This portion of the calibration procedure is complete when the display stops blinking and shows the C3 icon The unit will automatically switch to the third point of the calibration
16. e to the next parameter or press ENTER to return to the normal measurement mode P5 Display Backlight Setting Use the CAL or the M RM keys to select 0 1 3 or 6 minute default backlighting time e Momentarily press MODE to move to the next parameter or press ENTER to return to the normal measurement mode P6 Automatic Power OFF Setting e Use the CAL or the M RM keys to select a 0 10 or 20 minute Auto Power OFF time e Momentarily press MODE to move to the next parameter or press ENTER to return to the normal measurement mode Note The default setting for DO is 0 that is the auto power off function is defeated P7 Restore Factory Default Settings e Use the CAL or the M RM keys to select ON reset the factory default settings or OFF cancel edit e Momentarily press MODE to move to the first parameter P1 or press ENTER to return to the normal measurement mode Replacing the Membrane Cap Replace the Membrane cap under the following conditions Electrode response time increases Displayed value appears incorrect or abnormal Damaged or cracked membrane Replace as follows 1 2 Loosen and then remove the membrane cap Clean the electrode without membrane cap with distilled water and shake the water off of the electrode Lightly polish the cathode surface gold with a piece of clear velvet or tissue Slowly inject electrolyte into a new membrane cap After injecting check the electrolyte f
17. eading b In programming mode press to change the displayed number or ON OFF state 4 DO700 EU EN V2 1 5 11 Store Recall and Clear Datalogger Memory STORE Readings The meter can store up to 100 DO 100 pH 100 mV and 100 Conductivity readings for a total of 400 data points To store a reading wait until the reading stabilizes the smiling face icon appears when the reading stabilizes Press the M RM key momentarily to store a reading The M icon appears and the data point serial number increments RECALL Readings In the measurement mode press the M RM key to recall the most recently stored reading RM and the data point serial number for the displayed reading will appear on the LCD The measurement information will appear on the lower right hand side of the LCD Use the CAL or M RM buttons to scroll the remaining stored readings Press the ENTER key to return to the normal measurement mode CLEAR Readings From the RECALL mode press and hold the ENTER key for at least five 5 seconds The LCD display will show CLR indicating that all of the stored readings have been erased The unit will automatically return to the normal measurement mode after approximately 2 seconds 5 DO700 EU EN V2 1 5 11 pH Measurement Mode Preparation for Measurement 1 Unscrew the protective cap on the probe jack located on the bottom of the meter store the protective cap in the carrying case for later use 2 Carefully connect th
18. eter is equipped with a manual barometric pressure adjustment It is recommended that the value be set according to the standard barometric pressure table when there is an excessive change in barometric pressure while using meter This ensures the accuracy of the barometric pressure compensation To change the barometric value refer to parameter P3 in the previous section Use the Table in Appendix C for barometric pressure values You as the end user are legally bound EU Battery ordinance to return all used batteries disposal in the household garbage is prohibited You can hand over your used batteries accumulators at collection points in your community or wherever batteries accumulators are sold Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle 20 DO700 EU EN V2 1 5 11 Specifications pH Specifications Measuring range Resolution Accuracy Input current Input impedance Stability Temp Compensation range mV Specifications Measuring range mV E Resolution Accuracy Conductivity Specifications Conductivity measuring ranges TDS measurement range Salinity measurement range Resistivity Resolution Accuracy Electrode constant Reference temperatures Temp Compensation range Dissolved Oxygen Measuring range Resolution Accuracy Response time Residual current Temp compensation range Salinity compensation range Barometric pressure E
19. hat the closer the temperature of the sample solution to the calibration solution the more accurate readings Programming pH Parameters The Table below shows the available programming menu items P1 P7 Each parameter is explained in detail in the subsequent sections Parameters ode Seasons USA Europe amp U S A NIS NIST CH China Distilled water pH temperature compensation setting see notes OFF ON below this Table Distilled water with Ammonia pH yen compensation setting OFF ON see Notes below this Table Temperature unit setting 0 1 3 6min pH buffer solution series selection l Back light display time setting ub ul Auto power off setting nC 0 10 20min Restore to default factory settings OFF ON Notes on P2 and P3 Parameters Measurements of distilled water and distilled water mixed with ammonia affect the temperature compensation and the slope linearity of the pH probe Such measurements are sometimes used in the electrical power and petrochemical industries Set these parameters to ON only if necessary otherwise leave these parameters in the OFF state T DO700 EU EN V2 1 5 11 Parameter P1 pH Buffer Solution Setting 1 From the pH measurement mode press and hold MODE for at least 2 seconds and then release the P1 icon appears on the LCD 2 Use the CAL or the M RM keys to toggle through the three 3 selections USA for use in the USA or Europe NIS for NIST calibration purposes and CH f
20. lectrode type Other Technical Parameters Data storage Storage content Power Size and weight Quality Safety certification Ambient Conditions Environment temperature Environmental humidity IP rating 2 00 to 19 99 pH 0 1 0 01 pH Meter only 0 01pH with probe 0 02pH 2x10 A 21x10 Q 0 01 pH 3h 0 to 100 C 32 to 212 F Automatic ATC 1999 mV to 0 to 1999mV 1mV Meter 0 1 FS 0 00 to 19 99 uS cm 20 0 to 199 9 uS cm 200 to 1999 uS cm 2 00 19 99 mS cm 20 0 to 199 9 mS cm 0 to 100 g L TDS Total Dissolved Solids 0 to 100 ppt 0 to 100 Mohms 0 01 0 1 1 uS cm and 0 01 0 1mS cm Meter only 1 F S with probe 2 F S 0 1 1 10 cm 25 20 and 18 C 77 68 and 64 F 0 to 50 C 32 to 122 F Automatic ATC 0 to 40 00 mg L ppm 0 to 200 0 0 1 0 01 mg L ppm 1 0 1 Meter 0 10 mg L with electrode 0 40 mg L lt 30 s 25 C 90 response lt 0 1 mg L 0 to 45 C 32 to 112 F Automatic ATC 0 to 45 ppt Automatic 66 to 200 kPa Manual compensation Polarogram type 400 data groups Data serial number measurement amp unit of measure Two AA batteries 1 5V Meter 65 x 120 x 31mm 2 6 x 4 7 x 1 2 180g 6 3 oz Case 360 x 270 x 76mm 14 1 x 10 6 x 3 1 6kg 3 4 Ibs I809001 CE and CMC 5 to 35 C 41 to 95 F 8596 IP57 Dustproof and waterproof 21 DO700 EU EN V2 1 5 11 Appendices Appendix A Abbreviation Glossary Fri Solution Standard so
21. llow for a 15 minute polarization Press the power key to turn on the meter the DO indicator should appear Press and hold the ENTER key to select the desired unit of measure mg L ppm then release DO electrode 1 Calibration cover cap 2 Calibration cover Water soaked sponge 3 Calibration cover bottom Temperature electrode Membrane cap Cathode gold Anode o euo inb Ver ae Wee LIS o Salinity electrode Calibration Use the percentage 96 unit of measure for calibration Press the CAL key to enter the Calibration mode the flashing CAL icon will appear on the meter s LCD Put the DO electrode into the calibration solution calibration container that the probe was housed in upon delivery and tightly secure the cap of the calibration solution place vertically and allow polarizing for 3 to 5 minutes When the reading stabilizes the smile face icon appears on the LCD Press the CAL key again The LCD will display a flashing 100 indicating that the calibration is complete After several seconds the meter will display END and return to the measuring mode If the displayed reading does not stabilize polarize again per the Preparation section above and retry this calibration procedure 16 DO700 EU EN V2 1 5 11 Dissolved Oxygen Water Sample Test e To measure moving water water sample velocity of flow gt 5cm s insert the DO electrode into the water The water surface shoul
22. lution JUL Chinese Chinese series standard Europe USA series standard NIST series standard pH Temperature compensation setting for Distilled Water Pure2 pH Temperature compensation setting for Distilled Water with Ammonia Temperature Compensation Setting for temperature compensation Coefficient coefficient Reference Temperature Reference temperature setting Constant Calibration Calibration that uses a constant for reference rather than a solution 22 DO700 EU EN V2 1 5 11 Appendix B DO of Saturated Water vs Temperature iL aE bus E cL nun bed no L 1 44 1 atm ND A EO NEEDE NES R s ma 2 sm 3 w o e a oan 4 6 s ws ss n 8M m oem 3 r a 9 a 3m 3 78 31 23 DO700 EU EN V2 1 5 11 Appendix C DO of Saturated Water vs Barometric Pressure and Temperature mee m we e se 78 wem 3 s 559 7M wes 39 55 59 7 wem 1 53m 59 78 wa oo 5 55 7 mum oa 59 59 Conversion factor for mmHg and kPa mmHg x 0 13333 kPa DO PxDO 760 Note DO DO concentration under temperature t barometric pressure P mg L P Barometric pressure mmHg DO DO concentration under temperature t barometric pressure 7 60mmHg mg L 760 Barometric pressure mmHg 24 DO700 EU EN V2 1 5 11 Appendix D DO of Saturated Water vs Altitude pressure 25 C pressure 25 C KARTE a JE GE SE ER
23. measurement mode Parameter P7 Restore Factory Default Settings 1 From the P7 menu use the CAL or the M RM keys to select ON reset the factory default settings or OFF cancel edit 2 Momentarily press MODE to move to the first parameter P1 or press ENTER to return to the normal measurement mode 8 DO700 EU EN V2 1 5 11 pH Measurement Calibration and Electrode Considerations Error messages ERR 1 Electrode zero potential error and ERR 2 Electrode slope error For either error check the following 1 Air bubbles in the electrode bulb Shake rigorously to remove air bubbles 2 Accuracy of the pH buffers used in calibration Replace buffers if necessary 3 Set meter to its factory default state in Parameter P7 previous section of manual Calibration intervals depend on the sample the electrode performance and the required accuracy For high accuracy measurements lt 0 02pH the meter should be calibrated immediately before taking a measurement For general accuracy 2 0 1pH the meter can be calibrated and used for approximately one week before the next calibration The meter must be recalibrated in the following situations 1 New probe or probe that is unused for a long period of time 2 After measuring acids pH 2 or alkaline solutions pH gt 12 3 After measuring a solution that contains fluoride or a concentrated organic solution 4 Ifthe solution s temperature differs widely from the calibration solution
24. next parameter P2 or press ENTER to return to the normal measurement mode Parameter P2 Electrode Constant K Selection 1 From the P2 menu use the CAL or the M RM keys to select the desired electrode constant 0 1 1 0 or 10 The default setting is K 1 0 Momentarily press MODE to move to the next parameter P3 or press ENTER to return to the normal measurement mode 13 DO700 EU EN V2 1 5 11 Parameter P3 Reference Temperature Selection 1 From the P3 menu use the CAL or the M RM keys to select the desired reference temperature 25 20 or 18 C The default setting is 25 C 2 Momentarily press MODE to move to the next parameter P4 or press ENTER to return to the normal measurement mode Parameter P4 Temperature Coefficient Temperature Compensation Setting 1 From the P4 menu use the CAL or the M RM keys to select the coefficient in percent from 0 00 to 9 99 When set to zero the temperature compensation is turned OFF The default setting is 2 0 2 Momentarily press MODE to move to the next parameter P5 or press ENTER to return to the normal measurement mode Parameter P5 Electrode Constant calibration 1 In the P5 window the user can see the existing constant in the main measurement area of the LCD incm units 2 From the P5 menu use the CAL or the M RM keys to change the constant to match the constant printed on the electrode housing 3 Momentarily press MODE to move to the next parameter
25. on in distilled water for readings below 10 uS cm Note When the coefficient for the temperature compensation is set to 0 00 no compensation the measurment value will be based on the current temperature coefficient 5 sulfuric acid solution Important Note When one or more of the programmable parameters is changed by the user from its original factory default condition the parameter s code shown below is displayed in the upper right corner of the display as shown in diagram below in this case Parameter P Toc If more than one parameter is changed only the code from the first parameter change is displayed 12 DO700 EU EN V2 1 5 11 Programming Parameters Conductivity The Table below shows the available programming menu items P1 P9 Each parameter is ln in detail in the subsequent sections USA Europe amp U S A E eme Standard solution series selection SU CH China a Electrode Constant selection Con 0 1 1 or 10 a i 77 68 and 64 F 2 eference Temperature selection 20 and 18 C Temperature compensation 0 00 to 9 99 coefficient setting L7 e O SCENE NUN NN Te Bb em Mem RE em MM jene Parameter P1 Conductivity Solution Setting From the Conductivity mode press the MODE key the P1 icon appears on the LCD Use the CAL or the M RM keys to toggle through the two 2 selections USA for use in the USA or Europe and CH for use in China Momentarily press MODE to move to the
26. or air bubbles If air bubbles are present carefully tap the membrane cap to remove the air pockets Place the membrane cap on a clean surface and place the electrode in the cap vertically Slowly twist in a clockwise motion until electrode is tightly attached Excess electrolyte may be displaced wipe excess electrolyte with tissue and distilled water Check that there are no air bubbles present in the electrolyte smaller air bubbles are acceptable If large air bubbles are present re assembly will be required Do not touch the sensitive membrane when using the electrode or replacing the membrane cap Oils from the skin will affect the quality of the membrane and decrease the rate of oxygen permeability 19 DO700 EU EN V2 1 5 11 Zero Dissolved Oxygen Calibration The meter receives a zero oxygen calibration before leaving the factory and only requires a zero oxygen calibration when the electrode or the electrode cap is replaced or has been in use for a relatively extended period of time 6 months or longer To perform a zero oxygen calibration 1 Prepare 100mL of anaerobic water In a 100 mL beaker add 5g anhydrous sodium sulfite Na2SO3 to 100 mL distilled water Stir to dissolve The anaerobic water will be usable in 24 hours 2 Polarize the DO electrode by connecting it into meter for 15 minutes and then perform a standard calibration as described in the calibration section earlier in this manual 3 Place the electrode in the
27. or use in China 3 Momentarily press MODE to move to the next parameter P2 or press ENTER to return to the normal measurement mode Parameter P2 Distilled Water Temperature Compensation Setting 1 From the P2 menu use the CAL or the M RM keys to turn this feature ON or OFF 2 Momentarily press MODE to move to the next parameter P3 or press ENTER to return to the normal measurement mode Parameter P3 Distilled Water with Ammonia Temperature Compensation Setting 1 From the P3 menu use the CAL or the M RM keys to turn this feature ON or OFF 2 Momentarily press MODE to move to the next parameter P4 or press ENTER to return to the normal measurement mode Parameter P4 Temperature Measurement Units Setting 1 From the P4 menu use the CAL or the M RM keys to turn this feature ON or OFF 2 Momentarily press MODE to move to the next parameter P5 or press ENTER to return to the normal measurement mode Parameter P5 Display Backlight Setting 1 From the P5 menu use the CAL or the M RM keys to select 0 1 3 or 6 minute default backlighting time 2 Momentarily press MODE to move to the next parameter P6 or press ENTER to return to the normal measurement mode Parameter P6 Automatic Power OFF Setting 1 From the P6 menu use the CAL or the M RM keys to select a 0 10 or 20 minute Auto Power OFF time 2 Momentarily press MODE to move to the next parameter P7 or press ENTER to return to the normal
28. rometric pressure compensation function e he DO electrode must not be left static in the test solution Always stir the electrode in the solution e When measuring remove air bubbles from the solution under test otherwise measurement accuracy will be compromised e Small air bubbles in the electrode s electrolyte are acceptable however larger bubbles must be removed e Keep the surface of the DO electrode moist to protect the cathode electrolyte The supplied storage sponge should always be kept moistened for proper storage e The salinity electrode is installed in the DO electrode Its surface is plated with a layer of platinum black to reduce electrode polarization This surface must not be rubbed or wiped clean by swirling it in water Wash organic matter off of the surface with lukewarm water containing detergent or use alcohol if necessary e For any display abnormalities while measuring or calibrating set the meter to its factory default settings using parameter P7 explained in next section If abnormalities persist the electrode most probably needs replacing 17 DO700 EU EN V2 1 5 11 Parameter Settings i a 0 01 0 1 mg L and ppm 0 1 1 Refer to explanation below 66 to 200kPa Resolution selection Salinity calibration Barometric pressure setting 0 1 3 6 min 0 10 20 min OFF On shut set Back light display time setting Auto power off time setting Restore to producer setting P1 Resolution
29. se the electrode in the 1413yS cm calibration solution 4 Stir the solution with the electrode and allow it to rest in the solution until the stabilize icon appears 5 Press CAL again and the display will flash 1413yuS cm After several seconds the END icon will appear and the meter will return to the measuring mode 6 The LCD will display the icon M indicating that the calibration is complete p If the measurement value is unstable repeat the calibration until the measurement is stable Replace the electrode if necessary Notes The meter is calibrated before leaving the factory and can generally be used right out of the box The meter can only be calibrated in the Conductivity mode and not from the TDS oalinity or Resistivity modes Measuring the Conductivity of a Sample 1 Clean and dry the conductivity electrode and immerse in the sample solution 2 Stir the solution and allow the electrode to rest in the solution until the reading stabilizes smile face icon appears 3 Read the conductivity measurement on the meter s display 5 Press and hold the ENTER key to select TDS Total Dissolved Solids Salinity Resistivity or Conductivity measurement modes Calibration Considerations This meter offers two calibration solution series configurued in Parameter P1 a Europe amp U S A series 84uS cm 1413uS cm 12 88 mS cm and 111 9 mS cm b China series 146 6uS cm 1408yuS cm 12

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