Xylem DR PORTABLE REFRACTOMETER User Manual

Specification

g

Model Code Scale Range Resolution Accuracy

DR103 44-901 °Brix (% w/w sucrose) 0 – 35 0.1

RI 1.3330 – 1.3900 0.0001 ±0.0003

DR103L 44-903 °Brix (% w/w sucrose) 0 – 45 0.1

RI 1.3330 – 1.4098 0.0001 ±0.0003

DR112 44-904 °Brix (% w/w sucrose) 28 - 65 0.1

RI 1.3800 – 1.4535 0.0001 ±0.0003

DR122 44-905 °Brix (% w/w sucrose) 60 - 92 0.1

RI 1.4400 – 1.5230 0.0001 ±0.0003

DR401 44-906 Mass SW % (Brix) 0 - 35 0.1 ±0.2 ‘0’

AP 0 - 22 0.1 ±0.2

Oe (D) 0 - 150 1 ±1

Babo (KMW) 0 - 25 0.1 ±0.2

DR402 44-907 Mass SW % (Brix) 0 - 35 0.1 ±0.2 ‘0’

AP 0 - 22 0.1 ±0.2

Oe (Ch) 0 - 150 1 ±1

Baumé 0 - 18 0.1 ±0.2

±0.2

±0.2

±0.2

±0.2

Zero

sample

‘0’

‘0’

‘30’

‘60’

All models

Temperature Compensation

ATC source data

Temperature resolution

Dimensions 185 x 59 x 45 mm

Weight 175g

Power supply 9V battery type MN1604, 6LR61 or PP3

Battery life 2000 readings minimum

Automatic switch off After 90 seconds of inactivity

Automatic Compensation (ATC) to 20°C for sucrose solutions

10-40°C ICUMSA data; 5-10°C B+S data

0.1°C or 1°F

Bellingham+Stanley Ltd
Longfield Road
Tunbridge Wells, Kent TN2 3EY
England
United Kingdom
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Web: www.bellin

44-902 Issue 5 Rev A October 2007

hamandstanley.com

Bellingham+Stanley Inc.
1000 Hurricane Shoals Road,
Building D, Suite 300
Lawrenceville, GA30043
USA
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.bs-rfm.com

Eclipse Digital Refractometer Model DR

OPERATION MANUAL

Introduction

Thank you for purchasing the Bellingham+Stanley Digital Refractometer, Model DR. Please read these
instructions carefully before using the instrument to ensure correct use and to maintain your instrument in
good condition. If you have any questions about the instrument or refractometry in general, please do not
hesitate to contact Bellingham+Stanley. Also, you may wish to check the company’s website where you
will find information about our products and applications: www.bellinghamandstanley.com

Instrument Overview

On/Off
key

Temperature
key

Instrument
code number

Zero
key

Sample
Read
key

CE mark:
Specifies the instrument
conforms to relevant EU and
EMC regulations

LCD
display

Prism

Prism
dish

Battery
housing

Basic Operation

Inserting the
battery

Power On/Off

Cleaning the
prism

Taking
readings

Temperature

Changing the
scale

Remove the four fixing screws from the cover plate on the underside of the
instrument. Fit the 9V battery type supplied. Do not allow moisture to enter
the battery compartment. Re-fit the cover plate before using the instrument.

Press the On/Off key to switch the instrument on. The temperature will then be
displayed in °C
To switch off the instrument, press the On/Off key. The instrument will
automatically switch off after a period of 90 seconds inactivity.

It is important that the prism is completely clean before a test sample is applied.
Residues from sample remaining on the prism can dissolve in the applied sample
and affect the reading. Use a clean tissue and clean water (distilled or de­ionised) to clean the prism and the prism dish. If oil samples are being
measured, then use ethyl alcohol additionally for cleaning. Do not use aggressive
solvents such as acetone.

Clean the prism carefully before applying the test sample. Apply enough sample
to cover the prism (0.4 ml is sufficient)
Press the Mes key. The reading will be displayed within 2 seconds
Take successive readings to check repeatability, allowing the sample to reach
prism temperature.

The prism temperature can be checked at any time by pressing the Temp key.
A second press of the Temp key will change the display from °C to °F, or vice
versa. Note, however, all measurements are automatically compensated to a
reference temperature of 20.0°C, irrespective of the actual prism temperature.

Switch the instrument off.
Press and hold down both the Zero Set key and the Sample Read key and at the
same time press the On/Off key to switch the instrument on.

Instrument Calibration

Zero set

Zero check

To set or check the instrument calibration, use the Zero sample shown in the
Specification table overleaf. Zero Set & Check can be carried out on any scale.
‘0’ use distilled or de-ionised water
‘30’ use 30.00%
‘60’ use 60.00%

Clean the prism thoroughly and apply the Zero sample.
Press and hold down the blank Zero key until rEF is displayed (about 5
seconds). Within 10 seconds, press and hold down the Mes key until End is
displayed. This indicates the calibration (Zero Set) is complete.

With the Zero sample applied to a clean prism, press the Zero key. ‘zero check’
and the reading value will be displayed (with 0.01 resolution when using the
Brix scale). If the reading flashes, a Zero Set is required.

w

/w sucrose sample

w

/w sucrose sample

Checking/Validating the Instrument

Periodically, you may wish to check the performance of your DR refractometer. This may be
required as part of your Quality Management System. Suitable, certified calibration fluids for this purpose
can be obtained from Bellingham+Stanley Ltd.

Battery Low symbol

When this symbol is shown in the top left hand corner of the display, the battery should be
replaced. Fit a 9V battery type MN1604, 6LR61 or PP3. Ensure that a good quality battery is used and it is
inserted correctly. Do not allow moisture to enter the battery compartment. Re-fit the cover plate before
using the instrument.

Warning!

Always check the relevant Material Safety Data Sheet for a sample before applying it to the
refractometer. When applying samples that are harmful by skin or eye contact, wear appropriate
protective clothing and glasses. Avoid unnecessary contamination of the refractometer by confining
samples to the prism dish.

Caution!

The DR Digital Refractometer is a precision optical instrument and should be handled with care.
Do not drop or subject the instrument to sharp knocks. The instrument housing and display panel areas
are constructed from plastic materials that may suffer damage if contacted with aggressive organic
solvents. For example, avoid contact with solvents such as acetone and certain aromatic solvents. The
prism dish is chrome-plated, which could be corroded by certain acids and salts.

Maintain your DR Refractometer in a clean condition and avoid use and storage of the instrument outside
the specified temperature range. Avoid dusty and high humidity environments and prolonged exposure to
direct sunlight. Use the soft case provided to protect the instrument.

Deterioration/loss of the display may be indicative of low battery power or too low ambient temperature.
Do not persist in using the instrument with low battery power. Check/replace the batteries as necessary.
If “---“ is constantly displayed, contact B+S for advice.

If in doubt about the intended use of your DR, contact B+S for advice.

Certificate of Conformity

This Eclipse refractometer was tested and verified by Bellingham + Stanley Ltd. and has been
found to meet the published specifications for this instrument.

For the refractometer to continue to operate within our specifications, it should be kept in a
clean condition and well maintained in accordance with this instruction sheet.

Bellingham + Stanley Ltd.

This certificate implies no responsibility by Bellingham + Stanley Ltd. with regard to the accuracy of the
instrument after the date of examination at Bellingham & Stanley Ltd

.