The E-Line 90 is a full 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. Close the prism and view the borderline (light/dark
demarcation line) through the eyepiece
2
.
Taking a reading:
Depending on the concentration of the sample, select the range of
measurement
(Table 1)
by adjusting the scale selection control
3
. If the
concentration is unknown, apply the sample and step through the
ranges until a clear borderline is found. Adjustment of the dispersion
ring
4
will sharpen the borderline and should be set so that no colour
(blue/red) can be seen near the demarcation line. For dark samples,
adjust the cover plate
5
to allow more light to enter the prism.
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.
Adjust the reading by measuring the temperature
6
of the instrument
and adding the correction factor as shown on Table 2. Refractive
Index values can be obtained by using a conversion table available
from Bell Stanley Ltd.
Calibration:
Water may be used for checking the zero of the instrument, whilst
accurately made sugar solutions are ideal for checking points further
up the scale. When using water or sugar standards, always apply
temperature correction (Table 2). Solid test plates may also be used
but do not require temperature correction. The E-Line 90 does not
have a facility to adjust calibration and in the event that the calibration
is found to be incorrect, please contact Bell Stanley Ltd.
For
further information on calibration materials, visit the Bellingham
+ Stanley website.
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
1
Illuminating
Prism
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: sales@bellinghamandstanley.co.uk
6
Thermometer
2
Eyepiece
5
Cover Plate
3
Scale Selection
Control
4
Disperson Ring
Specification
Range
Scale One
Scale Two
Scale Three
0-90
˚
Brix
0-42
˚
Brix
42-71
˚
Brix
71-90
˚
Brix
Minimum Division
0.2
˚
Brix
E-Line 90 Refractometer
Instruction Manual
E-Line Refractometer top side
E-Line Refractometer under side
Warning
Order Code Description
44-806
E-Line 90 Refractometer
44-892 Iss 01 Rev 0