The E-Line 80 is a dual scale Brix refractometer ideal for use in the
food industry and other applications requiring concentration
measurements over a wide measurement range.
Applying the sample to the refractometer
:
Lift the illuminating prism
1
and apply the sample to the measurement
prism
2
. Close the prism and view the borderline (light/dark
demarcation line) through the eyepiece
3
.
Taking a reading:
Depending on the concentration of the sample, select the range of
measurement
(Table 1)
by adjusting the scale selection control
4
. If the
concentration is unknown, apply the sample and step through the
ranges until a clear borderline is found.
The concentration of the sample can be measured at the point the
borderline crosses the scale. Take care to ensure that the reading is
taken from the correct scale range.
Calibration:
The E-line 80 is calibrated to read accurately at 20
˚
C. Readings may
be taken at any other temperature by applying a correction factor
(Table 2).
Alternatively the E-line 80 has the facility to correct for temperature by
manual offset. Prior to taking a reading, ensure the temperature of the
instrument is stable. Apply distilled water and check that the reading
is zero (Scale 1). If the reading is not zero, use the screwdriver
supplied to adjust the zero calibration screw
5
so that the borderline
crosses the zero mark on the scale. No temperature correction is
required for this method but as the relationship between refractive
index and temperature is not linear, small errors may occur at the top
end of the scale compared to readings near water.
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.
This refractometer is a precision optical instrument and should be
handled with care. Do not drop or subject it to sharp knocks.
Optical glass is relatively soft and care should be taken not to scratch
the prism surface. Do not use metal spatulas or glass rods to apply
samples but instead use softer materials such as plastic.
Table 1
Bell Stanley Ltd.
Longfield Road, Tunbridge Wells, Kent TN2 3EY, United Kingdom.
Telephone: +44 (0) 1892 500400 Fax: +44 (0) 1892 543115
Website:
www.bellinghamandstanley.com
Email: [email protected]
Specification
Range
Scale One
Scale Two
0-80
˚
Brix
0-50
˚
Brix
50-80
˚
Brix
Minimum Division
0.1
˚
Brix
E-Line 80 Refractometer
Instruction Manual
Warning
Order Code Description
44-807
E-Line 80 Refractometer
44-893 Iss 01 Rev 0
E-Line 80 Refractometer Illuminating Prism closed
E-Line 80 Refractometer Illuminating Prism open
Eyepiece
3
Illuminating
Prism
1
Scale Selection Control
4
Zero Calibration
Screw
5
Measurement
Prism
2
