KERN ORD 45BM, ORD 85BM, ORD 92HM, ORD 1SM, ORD 92BM Operating Manual

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3 Description

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Similar to illustration

KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433-9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

1SM, 3SM, 2WM, 1PM,
2UM, 5UM, 6 US, 1RS,

CONTENTS

1 Introduction .............................................................................................................. 1

2

Specifications ........................................................................................................... 1

2.1

Models ....................................................................................................................... 2

3

Descr

iption

................................................................................................................ 3

4

General inf

ormation

.................................................................................................. 4

4.1

Intended use ............................................................................................................. 4

4.2 Warranty

................................................................................................................... 4

5

Basic safe

ty information

........................................................................................... 5

5.1

Follo

w the instructions in the operating manual

.................................................... 5

5.2

W

arning

................................................................................................................ 5-6

6

Supplied items .......................................................................................................... 6

7

Aut

omatic temperature compensation

................................................................. 6-7

8

Calibration/zer

o point calibration

........................................................................ 7-8

9

Measur

ing

.............................................................................................................. 8-9

10

Batter

y replacement

................................................................................................. 9

11

Switching the temperature ...................................................................................... 9

12

Switching t

he measuring scale

........................................................................... 9-10

13

T

roubleshooting

...................................................................................................... 10

13.1

Err

or messages

....................................................................................................... 11

14

Cleaning and maintenance ..................................................................................... 12

15

Storage ................................................................................................................. 12

16

Ser

vice

................................................................................................................. 13

17

Disposal ................................................................................................................. 13

18

Additional inf

ormation

............................................................................................ 13

19

Brix t

o refractive index (nD) conversion table

..................................................13-14

1. Introduction

This refractometer is an easy-to-use measuring instrument.
Please read the operating instructions before use to achieve an optimal
measurement result.
The refractometer is designed for fast and precise determination of concentrations
in liquids. Automatic temperature compensation is also included. The measuring
instrument will work reliably for many years if handled correctly. These instructions
apply to all digital refractometers listed under point 3.

2 Specifications

1. Temperature range 0 °C–40 °C (32 F–104 F)

2. Temperature measuring ac-curacy +/- 0.5 °C (1 F)

3. Automatic temperature compensation 10 °C–30 °C

4. Minimum volume of sample Approx. 3 drops

5. Measurement period ≤ 3 seconds

6. Power supply 2 x AAA batteries

7. Battery life ≥ 10,000 measurements

8. Dimensions 135 x 65 x 40 mm

9. Weight 180 g

10. Language Englisch

Operating manual
Digital refractometer

KERN & Sohn GmbH

KERN ORD 45BM, 92BM, 85BM,

92HM, 1SM, 3SM, 2WM,
1PM, 2UM, 5UM, 6 US, 1RS

Ziegelei 1
D-72336 Balingen
E-Mail: [e-mail]

Tel: +49-[0]7433-9933 -0
Fax: +49-[0]7433-9933 -149
Internet: www.kern-sohn.com

GB

2.1 Models

Version 1.1 05/2016

4. General information

4.1 Intended use

The refractometer is a measuring instrument for determining the refractive index of
transparent substances in liquid or in some cases also in the solid state. It is used
to observe the behaviour of light as it passes from a prism with known properties
to the substance being tested.
Use of the refractometer for other purposes is contrary to its intended use and
may be hazardous. The manufacturer shall not be liable for any damages caused by
improper use.

6. Supplied items

Aer unpacking and before using the device for the first time, check that all
listed parts have been supplied. Replace damaged or faulty parts immediately
and do not put them into operation.

▸ Refractometer ▸ Adjustment tool
▸ Storage box ▸ Cleaning cloth
▸ Pipette ▸ Calibration liquid

3. Gerätebeschreibung

1. LCD

2. Prism

3. Prism window

4. On/Off

5. Temperature display and
switchover (°C/°F)

6. Calibrate

7. Measure

1. LCD

2. Prisma

3. Prismen Fenster

4. Ein / Aus

5. Temperatur anzeigen und Umschalten (°C/°F)

6. Kalilbrieren

7. Messen

2

3

5

6

7
Abb. ähnlich

Battery compartment and
battery compartment
cover at the rear

ORA-BA-e-1510 4

Model Scales Measuring range Accuracy Division

Calibration

solution

KERN

ORD 45BM Brix

Refractive index

0 – 45 %

1.3330 – 1.4098 nD

± 0.2%

± 0.0003 nD

0.1 %

0.0001 nD

0% (distilled

water)

ORD 92BM Brix

Refractive index

58 – 92%

1.4370 – 1.5233 nD

± 0.2%

± 0.0003 nD

0.1 %

0.0001 nD

60% solution

ORD 85BM

Brix

Refractive index

0 – 85 %

1.3330 – 1.5100 nD

± 0.2%

± 0.0003 nD

0.1 %

0.0001 nD

0% (distilled

water)

ORD 92HM Brix

Baume

Water content

Refractive index

58 – 92%

38 – 43 °Be

13 – 25 %

1.4370 – 1.5233 nD

± 0.2%

± 0.1 °Be

± 0.1 %

± 0.0003 nD

0.1 %

0.1 °Be

0.1 %

0.0001 nD

60% solution

ORD 1SM Salt (NaCl)

Refractive index

0 – 28 %

1.3330-1.3900 nD

± 0.2%

± 0.0003 nD

0.1 %

0.0001 nD

0% (distilled

water)

ORD 3SM Brix

Salt (NaCl)

Refractive index

0 – 35 %

0 – 28 %

1.3330 – 1.3900 nD

± 0.2%

± 0.2%

± 0.0003 nD

0.1 %

0.1 %

0.0001 nD

0% (distilled

water)

ORD 2WM

Mass SW

Vol. AP

Oechsle

KMW (Babo)

0 – 35 %

0 – 22 %

30 – 150 °Oe

0 – 25 °KMW

± 0.2%

± 0.1 %

± 1 °Oe

± 0.1 °KMW

0.1 %

0.1 %

1 °Oe

0.1 °KMW

0% (distilled

water)

ORD 1PM Serum protein

Urine (spec.

weight)

Refractive index

0 – 12 g/dl

1.000 – 1.050 sgU

1.3330 – 1.3990 nD

± 0.1 g/dl

± 0.001 sgU

± 0.0003 nD

0.1 g/dl

0.001 sgU

0.001 nD

0% (distilled

water)

ORD 2UM

EG

PG

BF

CW

-50 – 0 °C

-50 – 0 °C

1.00 – 1.50 kg/l

-40 – 0 °C

± 0.5 °C

± 0.5 °C

± 0.01 kg/l

± 0.5 °C

0.1 °C

0.1 °C

0.01 kg/l

0.1 °C

0% (distilled

water)

ORD 5UM EG

PG

Urea

CW

-50 – 0 °C

-50 – 0 °C

0 – 40 %

-40 – 0 °C

± 0.5 °C

± 0.5 °C

± 0.2%

± 0.5 °C

0.1 °C

0.1 °C

0.1 %

0.1 °C

0% (distilled

water)

ORD 6US Urea 0 – 40 % ± 0.2% 0.1 % 0% (distilled

water)

ORD 1RS Refractive index 1.3330 – 1.5400 nD ± 0.0003 nD 0.0001 nD 0% (distilled

water)

4.2 Warranty

The warranty shall be void in the event of:

▸ Failure to observe the instructions in the operating manual
▸ Use for purposes other than those described
▸ Modifications or opening the device housing
▸ Mechanical damage and/or damage resulting from media, liquids, natural

wear and tear

5. Basic safety information

5.1 Follow the instructions in the operating manual

▸ Carefully read through the operating manual even if you have

prior experience with KERN refractometers.

▸ Every language version includes a non-authoritative translation.

The original German document is the definitive version.

5.2 Warning

▸ Do not let acids come into contact with skin or eyes. If acid comes into contact

with skin, flush with copious amounts of water. Shower if larger areas of skin are
affected.

▸ If acid comes into contact with eyes, keep the eyelid open and flush the eye with

running lukewarm water from the outer corner to the inner corner. Flush eyes for
at least 15 minutes. Then consult a doctor or ophthalmologist immediately.

▸ Thoroughly clean the refractometer aer each use.

▸ The refractometer must not be exposed to extreme temperatures, high

mechanical stresses, strong direct sunlight or high humidity.

▸ This refractometer is not a toy. Keep out of reach of children.

▸ Make sure that you will not be hit by anything else while you are using the

refractometer, as this could cause serious eye injuries

7. Automatic temperature compensation

The refractive coe

fficient is temperature-dependent. Materials expand when they
are heated (their density decreases) and contract when they cool (their density
increases). The speed of light through a liquid increases with the temperature
and the refractive coefficient therefore decreases.
In solid substances this thermal effect has only a minor impact. In liquid
substances, however, the change in density is considerable. Automatic

7

14

8

9

10

12

11

13

15 ORD-BA-e-1510

Data from "ICUMSA" International Commission for Uniform Methods

of Sugar Analysis, at 20 °C and 589 nm wavelength.

19. Brix to refractive index (nD) conversion table

Data from „ICUMSA“ International Commission for Uniform Methods
of Sugar Analysis, at 20 °C and 589 nm wavelength.

14. Cleaning and maintenance

Clean the refractometer using a so, lint-free cloth moistened with water, or if
necessary alcohol. Do not use any aggressive or abrasive cleaning agents. Never
immerse the device in water or hold it under running water. Never handle the
device with wet or damp hands.

Never touch the measuring prism [2] with hard tools made from plastic, wood,
rubber, metal, glass etc. Hard objects can quickly damage the relatively so
prism glass, re-sulting in measurement errors.

The refractometer is maintenance-free.

Cleaning should be carried out immediately before and aer each use of the
refractometer to maximise its life and optimise measurement results.

15. Storage

Store the refractometer in a dry, non-corrosive environment, preferably between
10 °C and 30 °C.

16. Service

Aer reading this operating manual, if you have any questions about setting up
or using the refractometer, or if any unexpected problem occurs, please contact
your dealer. The device housing may only be opened by trained service
technicians authorised by KERN.

17. Disposal

The packaging consists of environmentally friendly materials which can be
disposed of via local recycling facilities.
The device and storage box should be disposed of by the operator in accordance
with applicable national or regional regulations at the place of use.

18. Additional information

The product may differ slightly from the illustrations.
The

exposing the refractometer to direct sunlight!

Never bring the refractometer into contact with solvents.

9

13. Troubleshooting

If you suspect that the measuring instrument is not working correctly or displays
incorrect results, perform a zero point calibration. Then perform a measurement
using water to check the zero point. If the measured data still appear untrustwor­thy, please replace the batteries and perform the above calibration once again.
If the measuring instrument jams or no longer reacts, separate the measuring
instrument from the power supply by removing the batteries and replacing them.
If no data appears in the display when it is switched on, examine the position and
polarity of the batteries. If the instrument still does not work, please examine the
battery charge status and/or replace the batteries. If the batteries are good and
the measuring instrument still does not display, please call your dealer‘s technical
customer service.

11. Switching the temperature

The measuring instrument is multifunctional. A variety of measuring scales can be

used.

12. Switching the measuring scale

The measuring instrument is multifunctional. A variety of measuring scales can be
used.

2. Simultaneously press the ‚Cal‘ [6] and the ‚Meas‘ [7] buttons.
The measuring instrument will change the measuring scale:

[6] und die Taste „Meas“ [7]. Das

3. When the required measuring scale appears release the buttons again.
Adjustment is complete

9.

Measuring*

1. Inspect the prism window [3] to ensure it is clean and dry.

2. Apply a few drops of the liquid being examined onto the prism window.

3. Press the ‚Meas‘ button; the instrument begins to measure.

4. You may press the ‚Meas‘ button again and then release it; a second measurement is
then performed. Remember to clean and dry the prism aer measuring.

13.1 Error messages

13.1 Fehler Meldungen

Justierung außerhalb des Messbereiches (Null Punkt)

Adjustment outside of measuring range (zero point).

Justierung außerhalb des Messbereiches (Null Punkt)

Batterie leer

Battery discharged.

13.1 Fehler Meldungen

Justierung außerhalb des Messbereiches (Null Punkt)

Batterie leer

Temperature too low for measuring instrument (0 °C)

13.1 Fehler Meldungen

Justierung außerhalb des Messbereiches (Null Punkt)

Batterie leer

Temperatur für dasMessgerät

zu niedrig (0°C)

Temperatur für dasMessgerät zu hoch (40 °C)

Temperature too high for measuring instrument (40 °C)

13.1 Fehler Meldungen

Justierung außerhalb des Messbereiches (Null Punkt)

Batterie leer

Temperatur für dasMessgerät

zu niedrig (0°C)

Temperatur für dasMessgerät zu hoch (40 °C)

Temperatur für das Messgerät zu niedrig (32 °F)

Temperature too low for measuring instrument (32 °F)

13.1 Fehler Meldungen

Justierung außerhalb des Messbereiches (Null Punkt)

Batterie leer

Temperatur für dasMessgerät

zu niedrig (0°C)

Temperatur für dasMessgerät zu hoch (40 °C)

Temperatur für das Messgerät zu niedrig (32 °F)

Temperatur für das Messgerät zu hoch (104 °F)

Temperature too high for measuring instrument (104 °F)

13.1 Fehler Meldungen

Justierung außerhalb des Messbereiches (Null Punkt)

Batterie leer

Temperatur für dasMessgerät

zu niedrig (0°C)

Temperatur für dasMessgerät zu hoch (40 °C)

Temperatur für das Messgerät zu niedrig (32 °F)

Temperatur für das Messgerät zu hoch (104 °F)

Messung außerhalb des Messbereichs

Measurement outside of measuring range at bottom of scale.

Messung außerhalb des Messbereichs

Measurement outside of measuring range at top of scale.

Messung außerhalb des Messbereichs
am oberen Ende der Skala.

Messung außerhalb des Messbereichs

Measurement outside of measuring range at bottom of scale.

Messung außerhalb des Messbereichs
am oberen Ende der Skala.

Messung außerhalb des Messbereichs
am unteren Ende der Skala.

Messung außerhalb des Messbereichs

Measurement outside of measuring range at top of scale.

Messung außerhalb des Messbereichs
am oberen Ende der Skala.

Messung außerhalb des Messbereichs
am unteren Ende der Skala.

Messung außerhalb des Messbereichs
am oberen Ende der Skala.

Kalibrierflüssigkeit außerhalb des Messbereichs

Calibration liquid outside of measuring range

10.

Battery change

When the batteries are fully charged the “

„ symbol appears at the top
le of the display.
If the batteries are too weak or almost drained the „

“symbol appears at
the top right. The batteries should then be replaced. Open the battery cover on
the rear and replace the batteries. Always replace both batteries!

temperature compensation ensures accurate measurement results for water-based
solutions in relation to the temperature of the sample.

The refractometer is temperature-compensated for water-based, sugary solutions.
Temperature differences in a range of 10 °C–30 °C (50 °F–86 °F) can be compensated.
However, the temperature of the sample has only a minor influence on the accuracy of
the measurement. The volume of the sample compared to the mass of the refractometer
is so small that in moat cases the sample is almost immediately at the temperature of
the refractometer and assumes the ambient temperature, and is therefore in equilibrium
with the temperature range of the measuring instrument. The temperature coefficient of
the majority of water-based solutions is generally very close to the coefficient of the
cane sugar/water solution. However, the temperature coefficient of oils, hydrocarbons
and other, non-water-based solutions is generally greater. In order to achieve as
accurate a result as possible, non-water based samples should be measured at an
ambient temperature as close to 20 °C (68 °F) as possible.

8. Calibration/zero point calibration

The refractometer‘s zero position must be inspected prior to initial use and periodically
thereaer. A zero point calibration should be performed at least once daily and prior to
any measurement where the highest possible accuracy is required, or when moving to a
different environment with a different ambient temperature. For the majority of models all
you need for calibration/zero point calibration is distilled and deionised water. Ideally, the
ambient and calibration liquid temperature should be between 10 °C and 30 °C (50 °F–86
°F) during calibration.
Calibration liquid with 60% Brix is required for a variety of models.
You should be aware of the adjustment condition when using a measuring
instrument.

1. Inspect the prism to ensure that the surface is clean and dry.

2. Apply a few drops of the calibration liquid onto the prism window.

3. Press the CAL button [6] for five seconds; the measuring instrument begins the zero

point calibration process.

e-

4. The measuring instrument is performing the calibration process when ‚CAL3‘,

‚CAL2‘, ‚CAL1‘, ‚CAL0‘ appear in the display.

5. When the calibration process is complete this is shown in the display

6. Calibration liquids vary, depending on the measuring range of the instrument.

e-

BRIX RI BRIX RI BRIX RI

% nD % nD % nD

0 1,33299 30 1,38115 60 1,44193

1 1,33442 31 1,38296 61 1,44420

2 1,33586 32 1,38478 62 1,44650

3 1,33732 33 1,38661 63 1,44881

4 1,33879 34 1,38846 64 1,45113

5 1,34026 35 1,39032 65 1,45348

6 1,34175 36 1,39220 66 1,45584

7 1,34325 37 1,39409 67 1,45822

8 1,34476 38 1,39600 68 1,46061

9 1,34629 39 1,39792 69 1,46303

10 1,34782 40 1,39986 70 1,46546

11 1,34937 41 1,40181 71 1,46792

12 1,35093 42 1,40378 72 1,47037

13 1,35250 43 1,40576 73 1,47285

14 1,35408 44 1,40776 74 1,47535

15 1,35568 45 1,40978 75 1,47787

16 1,35729 46 1,41181 76 1,48040

17 1,35891 47 1,41385 77 1,48295

18 1,36054 48 1,41592 78 1,48552

19 1,36218 49 1,41799 79 1,4881

20 1,36384 50 1,42009 80 1,49071

21 1,36551 51 1,42220 81 1,49333

22 1,36720 52 1,42432 82 1,49597

23 1,36889 53 1,42647 83 1,49862

24 1,37060 54 1,42862 84 1,50129

25 1,37233 55 1,43080 85 1,50398

26 1,37406 56 1,43299

27 1,37582 57 1,43520

28 1,37758 58 1,43743

29 1,37936 59 1,43967

*

Further information on Measuring

It is important to take care of the lighting conditions in the user
environment when calibrating the device and subsequent
measuring a sample.
The measuring prism of the refractometer does not have any
coverage and therefore a measurement in addition to the light of
the internal light source is also influenced by ambient light.
To bright lighting (eg., by a lamp directly above the device) may
trigger an error message already during the calibration. Ordinary
(diffuse) light is not a problem.

The lighting conditions (or the location of the device) may not be
changed after the calibration or between different measurements,
otherwise the refractometer performs each of the processes on a
different basis and the results would not be comparable.

We recommend that both for the calibrations and for
measurements, after the sample was placed on the measuring
prism, to create an improvised opaque cover over the prism (incl.
sample).