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22

METHOD PROCEDURE

8.  METHOD PROCEDURE

8.1.  POTASSIUM LOW RANGE

REQUIRED REAGENTS
Code Description  Quantity

HI93750A-0

 

Potassium Reagent A 

6 drops

HI93750B-0

 

Potassium Reagent B 

1 packet

REAGENT SETS

HI93750-01

   Potassium Reagent - 100 tests

HI93750-03

   Potassium Reagent - 300 tests

For other accessories see ACCESSORIES section.

MEASUREMENT PROCEDURE

• Select the 

Potassium LR

 using the procedure described in the RANGE SELECTION 

section.

Note: 

If tutorial mode is disabled follow the measurement procedure below. If the 

tutorial mode is enabled, press 

Measure

 and follow the messages on the screen.

• Fill the cuvette with 10 mL of sample (up to 

the mark).

• Add 6 drops of 

HI93750A-0 

Potassium 

Reagent A. Replace the plastic stopper and the 
cap. Swirl the solution.

• Insert the cuvette into the holder and ensure 

that the notch on the cap is positioned securely 
in the groove.

10 mL

×

6

Summary of Contents for HI97750

Page 1: ...INSTRUCTION MANUAL HI97750 Potassium Low Range Medium Range Photometer ...

Page 2: ...g a Hanna Instruments product Pleasereadthisinstructionmanualcarefullybeforeusingthisinstrument This manual will provide you with the necessary information for correct use of this instrument as well as a precise idea of its versatility If you need additional technical information do not hesitate to e mail us at tech hannainst com or view our worldwide contact list at www hannainst com Dear Custome...

Page 3: ...6 2 CHEMICAL FORMULA UNIT CONVERSION 13 6 3 GLP 13 6 4 LOGGING DATA LOG RECALL 13 6 5 GENERAL SETUP 14 6 6 REAGENTS ACCESSORIES 17 6 7 CONTEXTUAL HELP 17 6 8 BATTERY MANAGEMENT 18 7 PHOTOMETER 19 7 1 RANGE SELECTION 19 7 2 COLLECTING MEASURING REAGENTS AND SAMPLES 19 7 3 CUVETTE PREPARATION 20 8 METHOD PROCEDURE 22 8 1 POTASSIUM LOW RANGE 22 8 2 POTASSIUM MEDIUM RANGE 25 9 WARNING ERROR DESCRIPTIO...

Page 4: ... Check Cuvette B for Potassium Cloth for wiping cuvettes Scissors 1 5V AA Alkaline batteries CAL Check standard certificates 2 pcs Potassium Low Range and Medium Range Instrument quality certificate Instruction manual Each HI97750 is delivered in a cardboard box and is supplied with Sample cuvette 2 pcs Sample cuvette cap 2 pcs Plastic stopper 2 pcs 1 5V AA Alkaline batteries Instrument quality ce...

Page 5: ... with plenty of water If reagent contacts skin rinse the affected area thoroughly with water Avoid breathing released vapors Waste disposal For proper disposal of reagent kits and reacted samples contact a licensed waste disposal provider 3 ABBREVIATIONS mg L milligrams per liter ppm mL milliliter C degree Celsius F degree Fahrenheit EPA US Environmental Protection Agency GLP Good Laboratory Pract...

Page 6: ...ter 466 nm Bandpass filter bandwidth 8 nm Bandpass filter wavelength accuracy 1 0 nm Light detector Silicon photocell Cuvette type Round 24 6 mm diameter 22 mm inside Additional Specifications Auto logging 50 readings Display 128 x 64 pixel B W LCD with backlight Auto off After 15 minutes of inactivity 30 minutes before a READ measurement Battery type 1 5 V AA Alkaline 3 pcs Battery life 800 measu...

Page 7: ...re able to validate the performance of the instrument at any time and apply a user calibration if necessary Hanna Instruments CAL Check cuvettes are made with NIST traceable standards The built in tutorial mode guides users step by step through the measurement process It includes all steps required for sample preparation the required reagents and quantities The HI97750 meter measures potassium con...

Page 8: ...over Keypad Description The keypad contains 3 direct keys and 3 functional keys with the following functions Press the functional key to perform the function displayed above it on the LCD Press and hold to power off on Press briefly to return to the previous screen Press to access the menu screen Press to display the context sensitive help menu ...

Page 9: ...bstance some of the radiation may be absorbed by atoms molecules or crystal lattices Photometric chemical analysis is based on specific chemical reactions between a sample and reagent to produce a light absorbing compound If pure absorption occurs the fraction of light absorbed depends both on the optical path length through the matter and on the physical chemical characteristics of the substance ...

Page 10: ... luminous efficiency providing more light while using less power They also produce little heat which could otherwise affect electronic stability LEDs are available in a wide array of wavelengths whereas tungsten lamps have poor blue violet light output Improved optical filters ensure greater wavelength accuracy and allow a brighter stronger signal to be received The end result is higher measuremen...

Page 11: ...eeping them in the original packing Store between 5 and 30 C 41 to 86 F do not freeze To perform a CAL Check 1 Press the key to enter menu Use the functional keys to select CAL Check Calibration and press Select The Not Available message or the date time and status of the last CAL Check will be displayed on the screen Note CAL Check Calibration is for the selected method Potassium LR and Potassium...

Page 12: ...rement PASSED The measured value is within the accuracy specification no user calibration is required OUT OF SPECIFICATION and Calibrate is available The measured value is near the expected value To update the user calibration press Calibrate Press Accept to confirm or Cancel to return to the previous screen OUT OF SPECIFICATION A user calibration is not allowed the measured value is outside of th...

Page 13: ...ood Laboratory Practice GLP shows the date and time of the last user calibration if available or factory calibration To erase the last user calibration and to clear the CAL Check press Clear and follow the prompts Press Yes to erase and return to the factory calibration data or No to exit the clear procedure 6 4 LOGGING DATA LOG RECALL The instrument features a data autolog function to help users ...

Page 14: ... selected log Press Del All to erase all the logged data If Del All is pressed follow the prompt to confirm Press Yes to delete all logged data No or the key to return to the log recall 6 5 GENERAL SETUP Press the key to enter the menu Use the functional keys to select Setup and press Select Use the functional keys to highlight desired option Backlight Option 0 to 100 Press Modify to access the ba...

Page 15: ...keys to highlight the value to be modified year month day hour minute or second Press Edit to modify the highlighted value Use the functional keys to change the value Press Accept to confirm or the key to return to the previous screen Time Format Option AM PM or 24 hour Press the functional key to select the desired time format Date Format Press Modify to change the date format Use the functional ...

Page 16: ... languages installed Beeper Option Enable or Disable When enabled a short beep is heard every time a key is pressed A long beep alert sounds when the pressed key is not active or an error is detected Press the functional key to enable or disable the beeper Tutorial Option Enable or Disable When enabled the user will be guided step by step through the measurement procedure Meter Information Press S...

Page 17: ...press Select to access a list of reagents and accessories To exit press the key 6 7 CONTEXTUAL HELP The HI97750 offers an interactive contextual help mode that assists the user at any time To access the help screen press the key The instrument will display additional information related to the current screen To read all the available information scroll the text using the functional keys To exit he...

Page 18: ...nostic test was successful the meter is ready for use The battery icon on the LCD will indicate the battery status battery full battery below 10 replace the batteries soon battery is low replace the batteries with new ones To conserve battery the meter will turn off automatically after 15 minutes of inactivity If a zero reading has been done but not a read auto off time is increased to 30 minutes ...

Page 19: ...trument is powered off 7 2 COLLECTING MEASURING REAGENTS AND SAMPLES Proper Use of Powder Packet 1 Use scissors to open the powder packet 2 Push the edges of the packet to form a spout 3 Pour out the content of the packet Proper Use of Dropper Bottle 1 Tap the dropper on the table several times and wipe the outside of the tip with a cloth 2 Always keep the dropper bottle in a vertical position whi...

Page 20: ...to the upright vertical position and wait for all of the solution to flow to the cuvette bottom This is one inversion The correct speed for this mixing technique is 10 15 complete inversions in 30 seconds This mixing technique is indicated with invert to mix and the following icon b The mixing method is indicated with swirl using one of the following icons c The mixing method is indicated with sha...

Page 21: ...sample stand too long after reagent has been added For best accuracy respect the timings described in each method It is possible to take multiple readings in a row but it is recommended to take a new zero reading for each sample and to use the same cuvette for zeroing and measurement when possible Discard the sample immediately after the reading has been taken or the glass might become permanently...

Page 22: ...MENT PROCEDURE Select the Potassium LR using the procedure described in the RANGE SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of sample up to the mark Add 6 drops of HI93750A 0 Potassium Reagent A Replace the plastic stopper and the cap Swir...

Page 23: ... holder and ensure that the notch on the cap is positioned securely in the groove Press Read and the display will show a 3 minutes countdown prior to the measurement To skip the timer press Read twice After the 3 minutes countdown has passed invert the cuvette 5 times to mix Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove Press Read to s...

Page 24: ...e the functional keys and press Select to change the displayed chemical formula to mg L of potassium oxide K2O INTERFERENCES Interference may be caused by Chloride above 12000 mg L Calcium above 10000 mg L CaCO3 Magnesium above 8000 mg L CaCO3 Sodium above 8000 mg L Ammonium above 10 mg L ...

Page 25: ...CEDURE Select the Potassium MR using the procedure described in the RANGE SELECTION section Note If tutorial mode is disabled follow the measurement procedure below If the tutorial mode is enabled press Measure and follow the messages on the screen Fill the cuvette with 10 mL of sample up to the mark Add 6 drops of HI93750A 0 Potassium Reagent A Replace the plastic stopper and the cap Swirl the so...

Page 26: ... holder and ensure that the notch on the cap is positioned securely in the groove Press Read and the display will show a 3 minutes countdown prior to the measurement To skip the timer press Read twice After the 3 minutes countdown has passed invert the cuvette 5 times to mix Insert the cuvette into the holder and ensure that the notch on the cap is positioned securely in the groove Press Read to s...

Page 27: ...e the functional keys and press Select to change the displayed chemical formula to mg L of potassium oxide K2O INTERFERENCES Interference may be caused by Chloride above 12000 mg L Calcium above 10000 mg L CaCO3 Magnesium above 8000 mg L CaCO3 Sodium above 8000 mg L Ammonium above 10 mg L ...

Page 28: ...zero cuvettes are inverted Swap the cuvettes and repeat the measurement There is either too much light or the instrument can not adjust the light level Please check the preparation of the zero cuvette and that the sample does not contain any debris The meter is either overheating or its temperature has dropped too low to operate within published accuracy specifications The meter must be between 0 ...

Page 29: ...he meter If the issue persists please contact Hanna Instruments technical support Battery level is too low for the meter to function properly Replace the batteries with new ones Tutorial mode has been enabled in the Setup menu Press Continue and follow the prompt on the screen Tutorial mode can be disabled in the Setup menu A critical error has occurred Restart the meter If the issue persists plea...

Page 30: ...ent s batteries follow these steps Turn the instrument off by pressing and holding the key Remove the battery cover by turning it counterclockwise Remove the old batteries replace them with three new 1 5V AA batteries Replace the battery cover turn it clockwise to close ...

Page 31: ...gent 300 tests 11 2 OTHER ACCESSORIES Code Description HI7101412 blue carrying case for HI977xx and 2 CAL Check cuvettes HI731318 cloth for wiping cuvettes 4 pcs HI731331 glass cuvette 4 pcs HI731336N cap for glass cuvette 4 pcs HI93703 50 cuvette cleaning solution 230 mL HI97750 11 CAL Check standards for Potassium cuvette kit ...

Page 32: ...aste Hand them over to the appropriate collection point for recycling Ensuring proper product and battery disposal prevents potential negative consequences fortheenvironmentandhumanhealth Formoreinformation contactyourcity yourlocal household waste disposal service the place of purchase or go to www hannainst com RECOMMENDATIONS FOR USERS Before using this product make sure it is entirely suitable...

Page 33: ...required contact your local Hanna Instruments Office If under warranty report the model number date of purchase serial number engraved on the bottom of the meter and the nature of the problem If the repair is not covered by the warranty you will be notified of the charges incurred If the meter is to be returned to Hanna Instruments first obtain a Returned Goods Authorization RGA number from the Te...

Page 34: ...34 MAN97750 09 19 ...

Page 35: ...Hanna Instruments reserves the right to modify the design construction or appearance of its products without advance notice ...

Page 36: ...World Headquarters Hanna Instruments Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA www hannainst com MAN97750 Printed in ROMANIA ...

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