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AMTAST EC910, Instruction Manual

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AMTAST EC910 Instruction Manual Download Page 33

32 

 

DO Calibration in % Saturation Mode 

EC910 portable  multiparameter water quality meter can be calibrated quickly in air. In the percentage saturation mode, the meter is able to perform   
either 1 or 2 points calibration. For single point calibration, we recommend that you perform 100% saturation calibration in the air. For the 2 points 
calibration, you need to use saturated anhydrous sodium sulfite solution (zero oxygen solution). 
 
100% SATURATION CALIBRATION: 
1.1  Press MODE key until the meter shows

 

 

indicator and measurement unit “%”. 

 

 

 
1.2  Make sure that you have selected 1 point calibration in the setup menu. 
1.3  Press CAL key, the meter enters calibration mode, the display shows “100%/CAL1”.   

 

 

 
1.4  Hold the dissolved oxygen probe in the air or place the sensor into air-saturated water for 3 to 5 minutes, press ENTER key to confirm. Wait for the 

measured value to stabilize, the display shows “END”. Single point calibration is completed. 

 
 
 
 
 
 
 
 
 

EC910   Portable Multiparameter Water  Quality Meter 

Summary of Contents for EC910

Page 1: ...EC910 Portable Multiparameter Water Quality Meter Instruction Manual AMTAST AMTAST USA INC ...

Page 2: ...r the unpacking please check all accessories are complete If any are damaged or missing please contact nearest distributor ACCESSORIES pH Electrode Conductivity Electrode Dissolved Oxygen Probe Temperature Probe pH Buffer Pouches pH4 01 7 00 10 01 Conductivity Calibration Solutions 84µS cm 1413µS cm 12 88mS cm Electrolyte Solution Membrane Cap pH Electrode Conductivity Electrode Dissolved Oxygen P...

Page 3: ...ation mode indicator Indicates meter is in the calibration mode Stable indicator Indicates the measured value has stabilized Setup mode indicator Indicates meter is in SETUP mode Hold indicator Indicates the displayed value has been frozen Memory mode indicator Indicates data is stored into memory Calibration Due Reminder Prompts user to calibrate the meter regularly Electrode slope indicator Indi...

Page 4: ...e key to enter temperature setting mode CAL Press the key to enter the calibration mode Press and hold the key to enter the setup menu MI Press the key to store current measured value Press key in setup mode to scroll up through menu Press key in temperature setting mode to increase the setting value MR Press the key to view calibration report or stored data Press key in setup mode to scroll down ...

Page 5: ...y electrode or dissolved oxygen probe Inserting the Batteries Before using the meter insert three 1 5V AA alkaline batteries into battery compartment follow the procedure outlined below 1 Remove the battery cover from meter s backside 2 Insert the batteries into the battery compartment note polarity 3 Replace the battery cover into its original position Installation is completed When batteries are...

Page 6: ... Rotate and push the connector clockwise until it locks FOR THE CONDUCTIVITY AND DISSOLVED OXYGEN ELECTRODES Insert the 6 pin connector into corresponding connector socket ensure the connector is fully seated After connection is completed DO NOT pull on the sensor cord Always make sure that the connector is clean and dry EC910 Portable Multiparameter Water Quality Meter ...

Page 7: ...fer solutions are the same as above Prepared standard buffer solutions should be stored in hermetically sealed glass containers Refilling Electrolyte Solution for DO Probe 1 Unscrew the membrane cap from the bottom of the dissolved oxygen probe 2 Fill the membrane cap halfway with electrolyte solution 3 Screw the membrane cap onto the probe excess electrolyte will drain out 4 Be sure the cathode o...

Page 8: ... 15 minutes FOR THE CONDUCTIVITY ELECTRODE Soak the electrode for a few minutes in tap water to remove dirt and oil stains on the electrode FOR THE DISSOLVED OXYGEN PROBE Connecting the probe to meter turn on the meter 10 to 15 minutes and wait for the probe to polarize Power On Off Press MEAS key to turn on the meter the display shows measured values mode indicators and help messages Press and ho...

Page 9: ...4 65 6 79 9 23 12 75 User Defined Buffer Calibration Points Select the number of calibration points you intend to calibrate the meter 1 point 2 points 3 points 4 points 5 points Resolution Sets the resolution for pH measurement 0 001pH 0 01pH 0 1pH Measurement Unit Sets the default temperature unit Degrees Celsius Degrees Fahrenheit ORP MODE PARAMETER DESCRIPTION OPTIONS DESCRIPTION DEFAULT Resolu...

Page 10: ...etting Range 0 0 to 10 0 o C 2 10 Calibration Points Select the number of calibration points 1 point 2 points 3 points 4 points 5 points Pure Water Coefficient Pure water coefficient will be calculated and applied automatically for ultra pure water measurement if enabled Enable Disable Normalization Temperature Sets the normalization temperature for conductivity measurement and calibration 25o C 2...

Page 11: ... per million mmHg Pressure unit kPa Pressure unit GENERAL OPTIONS PARAMETER DESCRIPTION OPTIONS DESCRIPTION DEFAULT Stable Criteria Sets the stability criteria for measurement When the LO option is enabled measuring value will stabilize quickly but reading is less accurate When the HI option is enabled measuring value will stabilize slowly but guarantees high accuracy Low High Auto Hold When the a...

Page 12: ...nction allows user to restore the meter back to factory default parameters When this function is enabled all calibration values and selected parameters will be lost or reset Enable Disable Setting the Default Parameters 1 If necessary press MODE key until the display shows corresponding mode indicator e g pH mode 2 Press and hold the key for 3 seconds the meter enters setup menu the display shows ...

Page 13: ...y shows an option in the submenu 5 Press or key to select the desired option 6 Press ENTER key to confirm the meter returns to measurement mode Setting is completed EXIT THE SETUP MENU During the setup mode press MEAS key the meter returns to measurement mode immediately MI Enter Parameter Option EC910 Portable Multiparameter Water Quality Meter ...

Page 14: ...ing the first use 1 Press and hold the key for 3 seconds to enter the setup menu 2 Press or key until the display shows DATE option 3 Press ENTER key to confirm the meter shows current year 4 Press or key to set the year 5 Press ENTER key to confirm the meter shows current date and time MI Enter Enter Year Format Month Day Format Hour Minutes EC910 Portable Multiparameter Water Quality Meter ...

Page 15: ...temperature compensation mode MANUAL TEMPERATURE COMPENSATION 1 DO NOT connect the temperature probe to meter 2 Press and hold the o C key for 3 seconds to enter temperature setting mode 3 Press or key to set the temperature value of sample 4 Press ENTER key to confirm the meter returns to measurement mode Setting is completed In the temperature setting mode press or key once the setting value wil...

Page 16: ...e to calibrate the meter when attaching a new electrode or during first use DO NOT reuse calibration solution after calibration contaminants in solution will affect the calibration and eventually the accuracy of the measurement SINGLE POINT CALIBRATION 1 1 Make sure that you have selected 1 point calibration in the setup menu 1 2 Rinse the pH electrode with distilled water 1 3 Press CAL key the me...

Page 17: ...tilled water Dip the electrode into the next standard buffer solution e g pH4 01 The meter automatically senses the current calibration solution and begins calibrating Calibration indicator begins flashing 2 4 Wait for the measured value to stabilize the display shows CAL3 The meter prompts you to continue with third point calibration 2 5 Repeat the steps 2 3 until the display shows END The meter ...

Page 18: ...h second point calibration 3 5 Rinse the pH electrode with distilled water Dip the electrode into the next custom buffer solution 3 6 Press or key to increase or decrease displayed value press ENTER key to confirm Calibration indicator begins flashing 3 7 Wait for the measured value to stabilize the display shows END The meter automatically returns to measurement mode Calibration is completed Duri...

Page 19: ... in the pH measurement mode the display shows LOC P 01 2 Press or key until the meter shows ELE P 02 Electrode Diagnosis 3 Press ENTER key to confirm the meter shows the last calibration date Format mm dd 4 Press key the meter shows OFS zero point offset potential MR MR mV EC910 Portable Multiparameter Water Quality Meter ...

Page 20: ...uffer group 6 After the browsing press MEAS key to exit the currect mode If you are not calibrate the meter or calibration is not successfully press MR key the display will show only MR Calibration Points Slope EC910 Portable Multiparameter Water Quality Meter ...

Page 21: ...dicator 2 Rinse the ORP electrode with distilled water Dip the electrode into the calibration solution Stir the sensor gently 3 Press CAL key the meter shows the current measured value 4 Press or key to set the displayed value press ENTER key to confirm Calibration indicator begins flashing 5 Wait for the measured value to stabilize the display shows END The meter returns measurement mode automati...

Page 22: ...hows LOC P 01 2 Press or key until the meter shows ELE P 02 Electrode Diagnosis 3 Press ENTER key to confirm the meter shows the last calibration date Format mm dd 4 Press key the meter shows OFS Offset Potential 5 After the browsing press MEAS key the meter returns to measurement mode MR Enter MR EC910 Portable Multiparameter Water Quality Meter ...

Page 23: ... ion calibration and measurement at same temperature If you are not calibrate the meter or calibration is not successfully the display will always show 0 000 1 Press MODE key until the meter shows indicator 2 If necessary select the concentration unit and ion valence Monovalent or Divalent in the setup menu Refer to Setup Menu section NOTE The meter is capable of using the mg L ppm or mol L as mea...

Page 24: ...ith a small amount of ion standard solution 6 Dip the electrode into corresponding calibration solution Stir the sensor gently to create a homogenous solution 7 Press ENTER key to confirm Calibration indicator begins flashing Wait for the measured value to stabilize the display shows 0 1 CAL2 The meter prompts you to continue with second point calibration MR Enter EC910 Portable Multiparameter Wat...

Page 25: ...easured value to stabilize the display shows 1 CAL3 The meter prompts you to continue with third point calibration 10 Repeat steps 8 to 9 above until the display shows END the meter returns to measurement mode automatically Calibration is completed EXIT THE CALIBRATION During the setup mode press MEAS key the meter returns to measurement mode immediately Enter EC910 Portable Multiparameter Water Q...

Page 26: ...P 01 2 Press or key until the display shows ELE P 02 Electrode Diagnosis 3 Press ENTER key to confirm the meter shows the last calibration date Format mm dd 4 Press key the meter shows calibration point and its slope 5 After the browsing press MEAS key to exit the current mode MR MR MR Calibration Point Slope EC910 Portable Multiparameter Water Quality Meter ...

Page 27: ... recommend that you perform 3 points calibration or select a standard value close to the sample value you are measuring The meter will automatically detect these conductivity standard solutions and prompt the user to calibrate the meter When the calibration is completed all new calibration values will automatically override existing data The following table shows acceptable conductivity range of c...

Page 28: ...t calibration standard e g 1413µS cm 1 5 Press ENTER key to confirm Calibration indicator begins flashing 1 6 Wait for the measured value to stabilize the display shows END The meter returns to measurement mode automatically Calibration is completed Enter EC910 Portable Multiparameter Water Quality Meter ...

Page 29: ...t calibration standard e g 12 88mS cm 2 4 Press ENTER key to confirm Calibration indicator begins flashing 2 5 Wait for the measured value to stabilize the display shows CAL3 The meter prompts you to continue with third point calibration 2 6 Repeat steps 2 3 to 2 4 above until the display shows END The meter returns to measurement mode automatically Calibration is completed MANUAL CALIBRATION EC91...

Page 30: ...3 seconds to enter setup menu the display shows CELL option 3 3 Press ENTER key to confirm the meter enters the cell constant setting mode 3 4 Press or key to select USER option Enter MI EC910 Portable Multiparameter Water Quality Meter ...

Page 31: ...p flashing The meter returns to measurement mode automatically Setting is completed During the calibration process if you want to exit calibration press MEAS key the meter will return to measurement mode immediately Performing the conductivity calibration will simultaneously calibrate the corresponding TDS salinity and resistivity value Enter EC910 Portable Multiparameter Water Quality Meter ...

Page 32: ...P 01 2 Press or key until the meter shows ELE P 02 Electrode Diagnosis 3 Press ENTER key to confirm the meter shows the last calibration date Format mm dd 4 Press key the meter shows calibration point and calibration factor e g K 0 998 5 After the browsing press MEAS key to exit the current mode MR MR MR Calibration Point Calibration Factor EC910 Portable Multiparameter Water Quality Meter ...

Page 33: ...ium sulfite solution zero oxygen solution 100 SATURATION CALIBRATION 1 1 Press MODE key until the meter shows indicator and measurement unit 1 2 Make sure that you have selected 1 point calibration in the setup menu 1 3 Press CAL key the meter enters calibration mode the display shows 100 CAL1 1 4 Hold the dissolved oxygen probe in the air or place the sensor into air saturated water for 3 to 5 mi...

Page 34: ... 4 Dip the dissolved oxygen probe into the saturated anhydrous sodium sulfite solution zero oxygen solution Stir the probe gently 2 5 Press ENTER key to confirm Calibration indicator begins flashing 2 6 Wait for the measured value to stabilize the display shows 100 CAL2 The meter prompts you to continue with second point calibration MI Enter EC910 Portable Multiparameter Water Quality Meter ...

Page 35: ...sponding mg L or ppm concentration value Therefore additional mg L calibration isn t required in most circumstances DO Calibration in mg L or ppm Mode 1 1 Press MODE key until the meter shows indicator and measurement unit mg L or ppm 1 2 Make sure that you have selected 1 point calibration in the setup menu 1 3 If necessary set the salinity and barometric pressure coefficient in the setup menu Re...

Page 36: ... stabilize the display will show END The meter returns to measurement mode automatically Single point calibration is completed 2 POINTS CALIBRATION 2 1 Make sure that you have selected 2 points calibration in the setup menu 2 2 Press CAL key the meter shows 8 25mg L CAL1 25o C 2 3 Press or key until the display shows 0 00mg L CAL1 Enter MI EC910 Portable Multiparameter Water Quality Meter ...

Page 37: ...he meter prompts you to continue with second point calibration 2 7 Dip the dissolved oxygen probe into air saturated water for 3 to 5 minutes press ENTER key to confirm Wait for the measured value to stabilize the display shows END The meter returns to measurement mode automatically Calibration is completed EXIT THE CALIBRATION During the setup mode press MEAS key the meter returns to measurement ...

Page 38: ...s from that of an accurate thermometer you need to calibrate the meter 1 Press and hold the o C key for 3 seconds to enter temperature calibration mode the display shows current temperature reading 2 Press or key to set the temperature value 3 Press ENTER key to confirm Calibration is completed EC910 Portable Multiparameter Water Quality Meter ...

Page 39: ...e meter contains two millivolt measurement modes ABSOLUTE MILLIVOLT MODE Press MODE key until the display shows measurement unit mV the meter is now enters absolute millivolt measurement mode RELATIVE MILLIVOLT MODE Press MODE key until the display shows indicator the meter enters relative millivolt measurement mode Select one of the above modes Dip the ORP electrode into sample solution stir the ...

Page 40: ...ivity electrode thoroughly with distilled water 3 Dip the electrode into the sample solution stir the sensor gently 4 Wait for the reading to stabilize record the measured value on the display Salinity Measurement EC910 portable meter provides two salinity measurement modes practical salinity unit PSU and natural seawater unit ppt 1 Press MODE key until display shows indicator and measurement unit...

Page 41: ... shows indicator 2 Connecting the dissolved oxygen probe to meter wait for 15 minutes to polarize the sensor 3 If necessary to set the barometric pressure and salinity coefficient in the setup menu Refer to SETUP MENU section 4 Submerse probe in the sample solution make sure the temperature sensor on the probe is fully immersed 5 Stir the probe gently wait for the reading to stabilize record the m...

Page 42: ...During the measurement process press MI key to input measured value into the memory Memory indicator appears on the display MEMORY RECALL 1 Press MR key in the measurement mode the meter shows LOC P 01 Data Log 2 Press ENTER key to confirm the meter shows page number of the stored data MI MR Enter Page number EC910 Portable Multiparameter Water Quality Meter ...

Page 43: ...shows date and time of the stored data Format mm dd hh mm 4 Press key again the display shows the stored data 5 After the browsing press MEAS key to exit the current mode MR MR EC910 Portable Multiparameter Water Quality Meter ...

Page 44: ...ECORDING This function helps you to record the measuring value within the specify time period Click the Interval Recording button and select a time option Click the Receive button the measured value will automatically send to data sheet The first data need 1 minute to be shown on screen Do not press any key on meter during the Interval Recording mode it will cause communication interruption GRAPH ...

Page 45: ... Soak the pH electrode in 0 1M HCl for 5 minutes Remove and rinse with deionized water then place in 0 1M NaOH for 5 minutes Remove and rinse again and soak in electrode storage solution for 30 minutes ORP Electrode Care and Maintenance Ensure that the ORP electrode is thoroughly washed with distilled water after each use In aggressive chemicals dirty or viscous solutions and solutions with heavy ...

Page 46: ...tall the probe Troubleshooting LCD DISPLAY CAUSE CORRECTIVE ACTION Electrode dried out Soak the pH electrode in 3M KCL solution for 15 minutes Soak the Ion Selective Electrode in the diluted standard solution Soak the conductivity electrode in tap water for a few minutes Measured value is out of range Check the electrode whether clogged dirty or broken Incorrect calibration solutions Using the fre...

Page 47: ...ion Points 2 to 5 points Calibration Solutions 0 001 0 01 0 1 1 10 100 1000 10000ppm mol L mg L Conductivity Range 0 20 00 200 0 2000µS cm 20 00 200 0mS cm Accuracy 0 5 F S Calibration Points 1 to 5 points Calibration Solutions 10µS cm 84µS cm 1413µS cm 12 88mS cm 111 8mS cm Temperature Compensation 0 100 C 32 212 F Manual or Automatic Temperature Coefficient 0 0 10 0 C Compensation Modes Linear o...

Page 48: ...racy 2 0 Resolution 0 1 Temperature Range 0 105 C 32 221 F Accuracy 0 5 C 0 9 F Resolution 0 1 C Calibration Points 1 point Measured value 10 C Others Hold Function Manual or Automatic Stability Conditions Low or High Calibration Due 0 to 31 days Power Off Manual or Automatic 10 20 30 minutes Reset Function Yes Memory Stores up to 500 data sets Output USB Communication Interface Connector BNC Disp...

Page 49: ...ease refer to the table below to select an applicable sensor SAMPLE TYPE P11 P12 P13 P14 P16 P17 P18 P19 P20 P21 Agar Beer Blood Products Bread Dough Cement Cosmetics Dairy Products Education Fats Cream Field Use Fish Products Lab Flasks Low Ionic Meat Cheese Micro Samples Paint Photographic Soil Surface Test Tubes Tris Buffer Viscose Samples EC910 Portable Multiparameter Water Quality Meter ...

Page 50: ...trode storage solution Dissolve 22 365 grams of potassium chloride reagent KCL in the 100mL distilled water Stir the solution until the solution has thoroughly mixed Addendum 4 How to prepare the conductivity standard solutions Place AR potassium chloride reagent in a 50mL beaker and dry in an oven for 3 to 5 hours at 105 C then cool to room temperature in desiccator CALIBRATION SOLUTIONS REAGENT ...

Page 51: ...lutions have about 5o C to 10o C difference 6 Record the temperature value TB and conductivity value CTB 7 Calculate the temperature coefficient of sample solution according to the formula shown above 8 Enter the calculated temperature coefficient into the meter Addendum 6 How to calculate the TDS conversion factor To determine the TDS conversion factor use the following formula Factor Where Actua...

Page 52: ...62 1200 87 2 654 1300 86 1 646 1400 85 0 638 1500 84 0 630 1600 82 9 622 1700 81 9 614 1800 80 9 607 1900 79 9 599 2000 78 9 592 Addendum 8 How to prepare the zero oxygen solution Dissolve 500mg of sodium sulfite reagent and a small amount of cobalt II chloride hexahydrate CoCl2 6H2O in the 250mL distilled water mix the solution until reagent is completely dissolved EC910 Portable Multiparameter W...

Page 53: ...gn parameters are also promoting these efforts and we expect to have little or no such materials in our product in the coming years We welcome our customer suggestions on how to speed up these efforts Warranty The warranty period for meter is one year from the date of shipment Above warranty does not cover sensor and calibration solutions For more information please contact nearest authorized dist...

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