MODE OF ACTION
The solids bend the light as it passes through the sample that is placed on the viewing plate. The amount of bend or degree of rotation due to the sample relates to the reading on the scale seen through the eyepiece.

CALIBRATION
1.Rinse the glass surface and plastic cover flap with distilled or deionised water and wipe dry.
2.Place a few drops of distilled or deionised water on the glass surface and lower the plastic flap to flatten the water sample evenly over the viewing glass.
3.Look through the eyepiece and rotate the eyepiece to focus the viewing scale.
4.A horizontal line will be visible and should intersect with zero on the viewing scale.
5.If the line passes through the zero, then the unit is measuring zero and is calibrated and ready for use.
6.If the line does not run through the zero, then the plastic cover on the tuning screw should be removed (located on the top of the unit) and the adjusting screw turned either clockwise or anticlockwise to either lift or lower the horizontal line as required using the provided screwdriver.

EXTRA PACKAGING INFO
The refractometer comes in a high-density plastic case lined with contoured foam. Inside the case is a plastic transfer pipette and screwdriver for use when calibrating the instrument.

Store the unit in its case to prevent dust entering the focal tube.

This tool should never be dropped and should always be stored within the shock absorbent foam case when not in use.

Ensure the unit is cleaned and dried between samples and after use.

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• Always measure brix at the same time of day, as readings will differ. For example, at midday, plant sap tends to be concentrated (due to evaporation) and brix readings will generally read higher.


• Brix readings will fluctuate after applications of fertilisers, chemicals and irrigation.


• Ideally a historical record should be developed over time by each user to help determine possible environmental influences, acceptable brix fluctuations and ideal upper levels in their particular situation. This also applies to those determining whether a fruit or vegetable is tasty.


• Generally, brix readings will drop with low atmospheric pressure (eg. the onset of a storm).


• Relying on published brix readings as guidelines can be problematic as often it is not stated whether the readings are derived from the plant sap or fruit juice (fruit juice readings tend to be much higher).


• Store the unit in its case to prevent dust entering the focal tube.


• This tool should never be dropped and should always be stored within the shock absorbent foam case when not in use.


• Ensure the unit is cleaned and dried between samples and after use.


• Brix readings before and after a fertiliser application can help determine the suitability of different inputs, eg. if the brix rises (after 1 – 24 hours after application) then it can be considered suitable, if it stays the same or reduces, it would be considered not suitable at that time.


• It has been widely assumed that calcium and phosphate are the key elements determining brix levels. However, recent research suggests that potassium can also play an important role.

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Any recommendations provided by Nutri-Tech Solutions Pty Ltd (NTS)
or its Distributors are advice only. As no control can be exercised over storage, handling, mixing, application or use, or weather, plant or soil conditions before, during or after application (all of which may affect the performance of our program), no responsibility for, or liability for any failure in performance, losses, damages, or injuries (consequential or otherwise), arising from such storage, mixing, application, or use will be accepted under any circumstances whatsoever. NTS recommend you contact an Agronomist prior to product application. The Buyer assumes all responsibility for the use of any NTS products.