KERN ORA 1 GG Operating Manual

Operating manual
Analogue refractometer
KERN ORA 1 GG Analogue nD
Gemology/gemstones
KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Contents
1

technical data.................................................................................................1

2

Description......................................................................................................2

3

General information .......................................................................................3

3.1 Intended use ...................................................................................................3

3.2 Warranty..........................................................................................................3

4

Basic safety information ...............................................................................4

4.1 Follow the instructions in the operating manual .......................................4

4.2 Warning ...........................................................................................................4

5

supplied items ................................................................................................5

6 Before First Use ...............................................................................................6
7 Handhabung / Messung ................................................................................6
7.1 Calibration with the calibration block .........................................................7
7.2 Measuring procedure ................................................................................ 8-9
8 Cleaning And Maintenance ......................................................................... 10
9 Storage ......................................................................................................... 11
10 service.......................................................................................................... 11
11 Disposal ........................................................................................................ 12
12 Additional information ................................................................................ 12
1 Technische Daten
1. technische Daten
echnische Daten
Mo d e lle Mes s bereic h
Models Measuring ran-
K E R N und
e lle Mes s bereic h S kalen-­‐
KeRn
ge and Scales
S kalen
R N und t eilung
O R A 1 G G RI: 1 ,3 0-­‐
S kalen Genauig keit
1 ,8 1
oRA 1 GG
RI: 1,30-1,81 nD
1 G G RI: 1 ,3 0-­‐ 0 ,0 1 RI
1 ,8 1
Beispiel der Skala für den ORA 1 GG
Example scale on ORA 1 GG
el der Skala für den ORA 1 GG
2. Description
2 Gerätebeschreibung
3
erätebeschreibung
3
2
2
1
1. Beleuchtungsöffnung mit Filter
2. Deckel
3. Polarisationsfilter
1
1. Beleuchtungsöffnung mit Filter
2. Deckel
3
3. Polarisationsfilter
Betriebsanleitung
Analoges Refraktometer
KERN ORA 1 GG Analog nD
Version 1.0
12/2014
Tel: +49- [ 0 ] 7433-9933-0
Fax: +49- [ 0 ] 7433-9933 -149
Internet: www.kern-sohn.com
ORA_1GG-BA-d-1410
Abmessungen Nettogewicht
S kalen-­‐
Scale gradua- Produkt Dimensions
t eilung
Abmessungen Nettogewicht
tions Accuracy Product
Genauig keit
Produkt
130x20x30mm
0 ,0 1 RI
0,01 nD 130x20x30mm
130x20x30mm 0,400kg
1. Illumination aperture with filter
4
2. Cap
3. Polarisation filter
4. Prism
4
5. Eyepiece
6. Housing
6
5
6
4. Prisma
5. Okular
6. Gehäuse
4. Prisma
5. Okular
ORA_1GG-BA-d-1410
6. Gehäuse
3. General information
GB
3.1 Intended use
KERN & Sohn GmbH
Ziegelei 1 Tel: +49-[0]7433- 9933-0
The refractometer is a measuring instrument for determining the refractive index
D-72336 Balingen Fax: +49-[0]7433-9933-149
E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com
of gemstones. 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
Gemologie / Edelsteine
may be hazardous. The manufacturer shall not be liable for any damages caused by
improper use.
3.2 Warranty
The warranty is 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
4. Basic safety information
4.1 Follow the instructions in the operating manual
4.2 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 after 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 refracto-
meter, as this could cause serious eye injuries
Net weight
Do not touch the lenses with your fingers.
0,400kg
0,400kg
5. supplied items
After 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
▸ Storage box
▸ Pipette
▸ Adjustment tool
▸ Cleaning cloth
▸ Calibration block + Contact liquid (Diiodomethane)
1
6. Before first use
Remove the protective film (if present) from the prism surface [ 4 ] .
7. Use/measurement
5
The refractometer can be used to quickly and accurately determine the refractive
index of gemstones. Please make sure your hands are dry before handling the
measuring device.
Some gemstones are monorefringent, they have only one refractive index. Other
gemstones - and actually the majority - have two different refractive indexes.
Birefringency is a measure of the difference between two refractive indexes in
bire-fringent gemstones and ranges between 0.003 and 0.287.
Only a very few gemstones are monorefringent – the only known gemstones
displaying this property are diamond, spinel and garnet.
The gemstone refractometer is small, lightweight and is frequently used in the
jewellery business.
2
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.
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