Xylem E-Line Refractometer ATC Range - Manual (Page 4)

Calibration
ATC models are corrected for temperature in the range 10-30°C and so should not require
adjustment unless the ambient temperature varies by more than 5 °C. If it is felt necessary to adjust
the factory set calibration, then the following procedure must be used.
Stabilise the instrument temperature. Apply distilled water to the prism and adjust the reading using
the calibration screw
4 until the borderline crosses the zero line.
Always check sample Health & Safety Data before applying to the refractometer.
When applying samples to the prism which are likely to cause harm to skin or eyes, wear
appropriate protective clothing and glasses.
These refractometers are precision optical instruments and should be handled with care.
Do not drop or subject them to sharp knocks.
°Brix to Refractive Index Conversion Table
The below table may be used to convert °Brix readings to refractive index where scale type
permits.
°Brix
Refractive
Index at
589.3nm and
20.0°C °Brix
Refractive
Index at
589.3nm and
20.0°C °Brix
Refractive
Index at
589.3nm and
20.0°C °Brix
Refractive
Index at
589.3nm and
20.0°C °Brix
Refractive
Index at
589.3nm and
20.0°C
0 1.33299 17 1.35891 34 1.38846 51 1.42220 68 1.46061
1 1.33442 18 1.36054 35 1.39032 52 1.42432 69 1.46303
2 1.33586 19 1.36218 36 1.39220 53 1.42647 70 1.46546
3 1.33732 20 1.36384 37 1.39409 54 1.42862 71 1.46790
4 1.33879 21 1.36551 38 1.39600 55 1.43080 72 1.47037
5 1.34026 22 1.36720 39 1.39792 56 1.43299 73 1.47285
6 1.34175 23 1.36889 40 1.39986 57 1.43520 74 1.47535
7 1.34325 24 1.37060 41 1.40181 58 1.43743 75 1.47787
8 1.34477 25 1.37233 42 1.40378 59 1.43967 76 1.48040
9 1.34629 26 1.37406 43 1.40576 60 1.44193 77 1.48295
10 1.34782 27 1.37582 44 1.40776 61 1.44420 78 1.48552
11 1.34937 28 1.37758 45 1.40978 62 1.44650 79 1.48811
12 1.35093 29 1.37936 46 1.41181 63 1.44881 80 1.49071
13 1.35250 30 1.38115 47 1.41385 64 1.45113 81 1.49333
14 1.35408 31 1.38296 48 1.41592 65 1.45348 82 1.49597
15 1.35568 32 1.38478 49 1.41799 66 1.45584
16 1.35729 33 1.38661 50 1.42009 67 1.45822
Data Source:
ICUMSA Methods Book, Specification and Standard SPS-3 (2000), Refractometry
and Tables - (Official)
Note: °Brix values greater than 85.00 are extrapolated from the relationship given in
ICUMSA SPS-3 (2000) Equation 1.
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