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8

MEASUREMENT PROCEDURE

Verify the instrument has been calibrated before taking measurements.

1. Wipe off prism surface located at the bottom of the sample well.

Make sure the prism and sample well are completely dry.

2. Using a plastic pipette, drip sample onto the prism surface. Fill

the well completely.

Note:

If the temperature of the sample differs significantly from the
temperature of the instrument, wait approximately 1 minute
to allow thermal equilibration.

3. Press the 

READ 

key. The result is displayed in units of % BRIX.

Note:

The last measurement value will be displayed until the next
sample is measured or the instrument is turned off. Temperature
will be continuously updated.

Note:

The 

ATC 

tag blinks and automatic temperature compensation

is disabled if the temperature exceeds the 10-40 °C / 50-104 °F
range.

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. Wipe dry. The instrument is ready for the next
sample.

Summary of Contents for HI 96811

Page 1: ...Instruction Manual HI 96811 Refractometer for Sucrose in Wine and Grape Products Measurements...

Page 2: ...DISPLAYELEMENTS 6 MEASUREMENTGUIDELINES 6 CALIBRATIONPROCEDURE 7 MEASUREMENTPROCEDURE 8 MAKINGASTANDARD BRIXSOLUTION 9 TOCHANGETEMPERATUREUNIT 9 BATTERYREPLACEMENT 10 WARRANTY 10 ERRORMESSAGES 11 PREL...

Page 3: ...ertainty associated with mechanical refractometers and are easily portable for measurements in the field Temperature in Cor F isdisplayedsimultaneouslywiththemeasurement on the large dual level displa...

Page 4: ...a higher to lower refractive index thereisacriticalangleatwhichanincomingbeamoflightcannolonger refract but will instead be reflected off the interface The critical angle can be used to easily calcul...

Page 5: ...tainless Steel Sample Well and Prism The HI 96811 converts the refractive index of the sample to sucrose concentration in units of percent by weight Brix also referred to as Brix The conversion used i...

Page 6: ...es Useplasticpipettestotransferallsolutions Donotusemetallictools such as needles spoons or tweezers as these will scratch the prism Toreducetheeffectsofevaporationorabsorptionofwaterwhentaking readin...

Page 7: ...distilled or deionized water Make sure the prism is completely covered Note If the ZERO sample is subject to intense light such as sunlight or another strong source cover the sample well with your ha...

Page 8: ...oximately 1 minute to allow thermal equilibration 3 Press the READ key The result is displayed in units of BRIX Note The last measurement value will be displayed until the next sample is measured or t...

Page 9: ...dissolved The total quantity can be scaledproportionallyforsmallercontainersbutaccuracymay besacrificed Example with 25 Brix Brix g Sucrose g Water g Total 25 25 000 75 000 100 000 TO CHANGE TEMPERATU...

Page 10: ...the instrument is off Turn instrument upside down and remove the battery cover by turning it counterclockwise Extract the battery from its location Replace with new 9V battery making certain to obser...

Page 11: ...a C N O t n e m g e s w o l C T A s d e e c x e e r u t a r e p m e T g n i r u d C 0 0 1 t i m i l n o i t a r b i l a c I H t y r a m i r p y a l p s i d l a C N O t n e m g e s h g i h C T A s d e...

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