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Summary of Contents for Hanna Instruments HI97750
- Page 1 HI97750 Potassium Low Range & Medium Range Photometer...
- Page 2 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. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA.
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. PRELIMINARY EXAMINATION ................4 2. SAFETY MEASURES ..................5 3. ABBREVIATIONS ................... 5 4. SPECIFICATIONS .................... 6 5. DESCRIPTION ....................7 5.1. GENERAL DESCRIPTION & INTENDED USE ..........7 5.2. FUNCTIONAL DESCRIPTION ..............8 5.3. PRECISION & ACCURACY ............... 9 5.4. -
Page 4: Preliminary Examination
1. PRELIMINARY EXAMINATION Remove the instrument and accessories from the packaging and examine it carefully. For further assistance, please contact your local Hanna Instruments Office or email us at tech@hannainst.com. Each HI97750C is delivered in a rugged carrying case and is supplied with: •... -
Page 5: Safety Measures
2. SAFETY MEASURES • The chemicals contained in the reagent kits may be hazardous if improperly handled. • Read the Safety Data Sheets (SDS) before performing tests. • Safety equipment: Wear suitable eye protection and clothing when required, and follow instructions carefully. •... -
Page 6: Specifications
4. SPECIFICATIONS Range 0.0 to 20.0 mg/L (as K) Resolution 0.1 mg/L Potassium LR Accuracy ±3 mg/L ±7 % of reading at 25 °C Adaptation of the Turbidimetric Method Tetraphenylborate Method Range 10 to 100 mg/L (as K) Resolution 0.1 mg/L Potassium Accuracy ±10 mg/L ±7 % of reading at 25 °C... -
Page 7: Description
With the CAL Check™ functionality, users are 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. -
Page 8: Functional Description
5.2. FUNCTIONAL DESCRIPTION 1. ON/OFF power button 3. Liquid Crystal Display (LCD) 5. Indexing mark 2. Keypad 4. Cuvette holder 6. Battery cover 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. -
Page 9: Precision & Accuracy
5.3. PRECISION & ACCURACY Precision is how closely repeated measurements are to one another. Precision is usually expressed as standard deviation (SD). Accuracy is defined as the closeness of a test result to the true value. Although good precision suggests good accuracy, precise results can be inaccurate. The figure explains these definitions. -
Page 10: Optical System
5.5. OPTICAL SYSTEM Instrument Block Diagram The internal reference system (reference detector) of the HI97750 photometer compensates for any drifts due to power fluctuations or ambient temperature changes, providing a stable source of light for your blank (zero) measurement and sample measurement. -
Page 11: General Operations
6. GENERAL OPERATIONS 6.1. METER VALIDATION: CAL CHECK & CALIBRATION Validation of the HI97750 involves verifying the concentration of the certified CAL Check standards. The CAL Check screen guides the user step-by-step through the validation process and user calibration (if necessary). - Page 12 • “OUT OF SPECIFICATION“: A user calibration is not allowed, the measured value is outside of the tolerance window. Check the certified value, expiration date and clean the outside of the cuvette. Repeat the CAL Check procedure. If this error continues contact your nearest Hanna Instruments Customer Service Center.
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Page 13: Chemical Formula & Unit Conversion
6.2. CHEMICAL FORMULA & UNIT CONVERSION Chemical formula and unit conversion factors are pre-programmed into the instrument. In order to view the displayed result in the desired chemical formula enter menu by and use the functional keys to select Chemical Form. Press Select pressing to change the displayed chemical formula. -
Page 14: General Setup
Use the functional keys to highlight a log and press Info to view additional information about the log. From this screen Next and Previous can be used to view other logs. Press Delete to erase logged data. After pressing Delete a prompt on display is asking for confirmation. - Page 15 Contrast Option: 0 to 100 % Press Modify to change the display’s contrast. Use the functional keys to increase or decrease the value. Press Accept to confirm the value or the key to return to the Setup menu without saving the new value. Date &...
- Page 16 Decimal Separator Option: Comma ( , ) or Period ( . ) Press the functional key to select the desired decimal separator. The decimal separator is used on the measurement screen. Language Press Modify to change the language. Use the functional keys to select the desired language.
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Page 17: Reagents & Accessories
Select to access a list of reagents and accessories. To exit press the key. 6.7. CONTEXTUAL HELP HI97750 offers an interactive contextual help mode that assists the user at any time. To access the help screen press the key. -
Page 18: Battery Management
The meter will perform an auto-diagnostic test when it is powered on. During this test, ® the Hanna Instruments logo will appear on the LCD. If the auto-diagnostic test was successful, the meter is ready for use. The battery icon on the LCD will indicate the battery status: •... -
Page 19: Photometer
7. PHOTOMETER 7.1. RANGE SELECTION Press Range when in measurement mode to access the list of ranges. Use the functional keys to highlight the desired method then press Select. The selected range will be saved when the instrument is powered off. 7.2. -
Page 20: Cuvette Preparation
7.3. CUVETTE PREPARATION Proper mixing is very important for reproducibility of the measurements. The proper mixing technique for each method is listed in the method procedure. (a) Invert the cuvette a couple of times or for a specified time: hold the cuvette in the vertical position. - Page 21 Whenever the cuvette is placed into the measurement holder, it must be dry outside and free of fingerprints, oil or dirt. Wipe it thoroughly with HI731318 microfiber cleaning cloth prior to insertion. Shaking the cuvette can generate bubbles in the sample, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.
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Page 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 •... - Page 23 • Press Zero. The display will show “-0.0-” when the meter is zeroed and ready for measurement. • Remove the cuvette. • Add one packet of HI93750B-0 Potassium Reagent B. Replace the plastic stopper and the cap. Shake gently for 1 minute. •...
- Page 24 key and use the functional keys to select Chemical Form. • Press the • Use the functional keys and press Select to change the displayed chemical formula to mg/L of potassium oxide (K INTERFERENCES Interference may be caused by: • Chloride above 12000 mg/L •...
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Page 25: Potassium Medium Range
8.2. POTASSIUM MEDIUM 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 •... - Page 26 • Press Zero. The display will show “-0.0-” when the meter is zeroed and ready for measurement. • Remove the cuvette. • Add one packet of HI93750B-0 Potassium Reagent B. Replace the plastic stopper and the cap. Shake gently for 1 minute. •...
- Page 27 key and use the functional keys to select Chemical Form. • Press the • Use the functional keys and press Select to change the displayed chemical formula to mg/L of potassium oxide (K INTERFERENCES Interference may be caused by: • Chloride above 12000 mg/L •...
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Page 28: Warning & Error Descriptions
Ensure that the notch on the cap is positioned securely in the groove before performing any measurements. If the issue persists, please contact Hanna Instruments technical support. The sample and the zero cuvettes are inverted. Swap the cuvettes and repeat the measurement. - Page 29 English is the only available language. Help function is not available. Restart the 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.
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Page 30: Battery Replacement
10. BATTERY REPLACEMENT To replace the instrument’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. •... -
Page 31: Accessories
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: Certification
CERTIFICATION All Hanna Instruments conform to the CE European Directives. RoHS compliant Disposal of Electrical & Electronic Equipment. The product should not be treated as household waste. Instead hand it over to the appropriate collection point for the recycling of electrical and electronic equipment which will conserve natural resources. -
Page 33: Warranty
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 Technical Service department and then send it with shipping costs prepaid. - Page 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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