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The 

HI96831

 

Digital Refractometer is a rugged portable, water 

resistant device that utilizes the measurement of refractive index to 

determine the % volume and freezing point of ethylene glycol based 

coolants or antifreeze.

The 

HI96831

 device benefits from Hanna Instruments’ years of experi‑

ence as a manufacturer of analytical instruments. The digital 

refractometer eliminates the uncertainty associated with mechanical 

refractometers and is easily portable for use in the field to optimize 

your cooling system.

The 

HI96831

 refractometer is an optical device that is simple and 

quick to use. Samples are measured after a simple user calibration 

with distilled or deionized water. Within seconds, the refractive 

index and temperature are measured and converted into one of two 

measurement units; % Volume or Freezing Point. The instrument 

utilizes internationally recognized references for unit conversion and 

temperature compensation for ethylene glycol solutions (e.g. CRC 

Handbook of Chemistry and Physics, 87

th

 Edition).

The temperature (in °C or °F) is also displayed on the large dual level 

display along with helpful message codes.

Key features include:
•  IP65 waterproof protection
•  Automatic Temperature Compensation (ATC)
•  Battery operation with Low Power indicator (BEPS)
•  Automatically turns off after 3 minutes of non‑use

GENERAL DESCRIPTION

Summary of Contents for HI 96831

Page 1: ...HI96831 Ethylene Glycol Refractometer INSTRUCTION MANUAL...

Page 2: ...nna Instruments product Please read this instruction manual carefully before using this instrument This manual will provide you with the necessary informa tion for correct use of this instrument as we...

Page 3: ...its Functional Description Display Elements Measurement Guidelines Calibration Procedure Measurement Procedure To Change Measurement Unit To Change Temperature Unit Making a Standard Solution Battery...

Page 4: ...urred please contact your local Hanna Instruments Office Each HI96831 instrument is supplied with 9 V battery Instruction manual Plastic pipette Quality Certificate Note Save all packing material unti...

Page 5: ...mple and quick to use Samples are measured after a simple user calibration with distilled or deionized water Within seconds the refractive index and temperature are measured and converted into one of...

Page 6: ...5 F Temperature Compensation Automatic between 10 0 and 40 0 C 32 0 104 0 F Measurement Time Approximately 1 5 seconds Minimum Sample Volume 100 L cover prism totally Light Source Yellow Led Sample Ce...

Page 7: ...index there is a critical angle at which an incoming beam of light can no longer refract but will instead be reflected off the interface Thecriticalanglecanbeusedtoeasilycalculatetherefractiveindexac...

Page 8: ...from 0 0 to 50 0 C cor respondingto0 58 byvolume Thedisplayblinksthefreezingpointwhenthe concentrationofEthyleneglycolisgreaterthan78 concentrationbyvolume When the display shows LO the freezing poin...

Page 9: ...Display 3 Primary Display 4 READ Key User Measurement 5 ZERO Key User Calibration 6 RANGE Key User Measurement Unit 7 ON OFF 8 Stainless Steel Sample Well and Prism TOP VIEW 9 Battery Cover 10 Battery...

Page 10: ...between samples Use plastic pipettes to transfer all solutions Do not use metallic tools such as needles spoons or tweezers as these will scratch the prism Cover sample well with hand if measuring in...

Page 11: ...sample well with distilled or deionized water Make sure the prism is completely covered CALIBRATION PROCEDURE Note If the ZERO sample is subject to intense light such as sunlight or another strong sou...

Page 12: ...hermal equilibration MEASUREMENT PROCEDURE 4 Remove sample from the sample well by absorbing with a soft tissue 5 Using a plastic pipette rinse prism and sample well with distilled or deionized water...

Page 13: ...nt toggles between the two measurement scales each time the key is pressed and the primary display indicates VoL Volume or FrPt for Freezing Point When the instrument displays the screen with 4 dashes...

Page 14: ...play the all segment screen followed by a screen with the model number on the primary display and the version number on the secondary display Continue pressing the ON OFF key 2 While continuing to hol...

Page 15: ...g the total volume to 100 mL Mix solution well before use Ethylene Glycol Total Volume Expected Freezing Point Value 10 V 10 00 mL 100 00 mL 3 8 C 25 2 F 40 V 40 00 mL 100 00 mL 26 3 C 15 4 F To make...

Page 16: ...off Turn instrument upside down and remove the battery cover by turning it counterclockwise Extract the battery from its location Replace with a new 9V battery making sure to observe polarity Insert t...

Page 17: ...isplay Cal segment ON Temperature exceeds ATC low limit 10 0 C during calibration t HI primary display Cal segment ON Temperature exceeds ATC high limit 40 0 C during calibration Air Prism surface ins...

Page 18: ...18 MAN96831 04 17 ACCESSORIES Code Description HI740157P Plastic refilling pipette 20 pcs HI740029P 9V battery 10 pcs...

Page 19: ...mber 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 instrument is to be returned to Hanna Instruments first obtain a Ret...

Page 20: ...ents Inc Highland Industrial Park 584 Park East Drive Woonsocket RI 02895 USA www hannainst com Local Office Hanna Instruments USA 270 George Washington Highway Smithfield RI 02917 Phone 800 426 6287...

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