ATAGO MASTER Series Instruction Manual

7. Quick and Easy sampling

Place apporoximately 0.3mL of sample on the front end (Figure ①) or the rear end
(Figure ②) of the sample stage, and tilt the refractometer slightly in the proper
direction to allow the sample to move over the prism. The sample liquid will spread
evenly and the measurement value can then be read more quickly and easily. By
eliminating the steps of lifting and closing the daylight plate when applying a
sample, the operator can save much time when having to measure many samples
daily. (This measuring method requires the sample to be low in viscosity.)

8. Brix Scale

All refractometers are designed to measure the refractive index of a solution. The Brix scale is based on a sucrose
(sugar) and water solution. However, since most samples contain substances other than sugar - such as salts, minerals
and proteins - the Brix percentage represents the total concentration of all soluble solids in the sample. For certain
samples, such as cutting oils and other industrial fluids, a conversion chart from the Brix percentage to the sample's
total concentration may be necessary.
Note: A brix value expressed as a percentage (％) is equivalent to that value expressed in degrees Brix (°Brix).

9. When moisture accumulates in the eyepiece

If the view of the scale and boundary line becomes obstructed by moisture
within the eyepiece, follow the instructions below for proper cleaning:
①While holding the eyepiece toward you, turn the eyepiece counter-clockwise
until it can be removed.
②Gently wipe the two areas indicated by the arrows in the figure with a
clean, dry cloth to remove any moisture.
③Replace the eyepiece and secure by turning in a clockwise direction.
※MASTER-α series are water-resistant rated (JIS-C0920 5th grade jet proof type, IEC
specification 529, IP65), however the eyepiece section is not water-resistant.

10. Repair and warranty

The MASTER-α series are warranted for one year after the date of purchase against any manufacturer defect in materials or workmanship.
Prism and sample stage are excluded from the warranty. Any of the following events happening to the unit will void the warranty:
●Disassembled by anyone other than authorized service provider ●Immersed in liquid or dropped
●Misused, abused, or used/stored in improper ambient conditions
Service fees are applicable for repairs after the warranty period expires. Contact an authorized ATAGO Service Center or the
original seller for details.
Have the serial number of your refractometer available when asking about repair.

11. Specifications

MASTER-53α
(Cat.No.2351)
Measurement range
Brix 0.0 to 53.0%
Minimum scale Brix 0.2%
Accuracy Brix ±0.2%
(at 20℃)
Repeatability Brix ±0.1% (at 20℃)
I
nternational
Protection class
Size and weight 3.2×3.4×16.8cm, 130g 3.2×3.4×20.3cm, 155g
Design Registration No.000379326-0001, 000379326-0002 (EU), ZL 2005 3 0116403.4,5 (China), D111526 (Taiwan), D554, 549 (U.S.A.)
1255763, 1255764, 1255765, 1255766, 1255767 (Japan)
TEL: 91-22-28544915 / 40713232
Headquarters: The Front Tower Shiba Koen
customerservice@atago-india.com
23rd Floor 2-6-3 Shiba-koen, Minato-ku
Tokyo 105-0011, Japan
TEL: 66-21948727-9 ,66-21171549
TEL: 81-3-3431-1943 FAX:81-3-3431-1945
customerservice@atago-thailand.com
overseas@atago.net http://www.atago.net/
TEL: 55 16 3913-8400
customerservice@atago-brasil.com
TEL: 1-425-637-2107
customerservice@atago-usa.com
TEL: 39 02 36557267
customerservice@atago-italia.com
①
MASTER-10α
MASTER-20α
(Cat.No.2371) (Cat.No.2381)
Brix 0.0 to 10.0% Brix 0.0 to 20.0%
(Automatic Temperature Compensation)
Brix 0.1% Brix 0.1%
Brix ±0.2% Brix ±0.2%
(10 to 30℃) (10 to 30℃)
Brix ±0.1% Brix ±0.1%
IP65 Water Resistant (except eyepiece)
3.2×3.4×20.7cm, 165g 3.2×3.4×20.3cm, 155g
Patent Granted in countries around the world.
TEL: 86-20-38108256
info@atago-china.com
TEL: 7-812-777-96-96
info@atago-russia.com
TEL: 234-707-558-1552
atagonigeria@atago.net
TEL: 7-727-257-08-95
info@atago-kazakhstan.com
In just-a-minute
②
It requires only 1 minute!
(The registration page can be accessed from ATAGO website.)
MASTER SERIES REFRACTOMETER
(Water Resistant ＆ Automatic
Temperature Compensation)
MASTER-53α
MASTER-10α
Check
To ensure your refractometer continues to operate properly and look new for a long time!
Point
When measuring samples with a high salt content, be sure to clean the refractometer by wiping the unit completely after each use,
especially the metal areas. The unit should be stored in the ATAGO storage box provided when not in use.
outside of eyepiece
Thank you for your purchase of a quality ATAGO product.
光... Capture the Light, Measure the Future!

1. Names and functions of main parts

inside of eyepiece
MASTER-α
(Cat.No.2311)
Brix 0.0 to 33.0%
Brix 0.2%
Sample Stage
Brix ±0.2%
(10 to 30℃) ATAGO instruments are rigorously inspected to ensure each unit meets the highest standards of quality assurance.
Brix ±0.1%
PRECAUTIONS
(Be sure to read the following before use.)
When using this instrument to measure
solutions which may be harmful to humans,
please handle all materials carefully, using the
proper gloves and mask. Please be aware of
any special handling instructions for any
harmful solution.
1910K Printed in Japan
2
From 1 year to years
Free Extended Warranty
Simply by answering questions, warranty period is extended from 1 year to 2 years.
MASTER-20α
(Cat.No. 2351, Brix 0.0 to 53.0%)
MASTER-α
(Cat.No. 2371, Brix 0.0 to 10.0%)
Grip
Daylight plate
Prism
Scale adjustment screw
（The photo is the MASTER-53α.）
●Carefully read the instruction manual of this instrument to
ensure proper use and operating methods.
●When handling and carrying this instrument, avoid dropping or
subjecting to any strong shock or excessive force.
Warning!
●If this instrument is used for any application other than its
intended purpose, ATAGO will not be held liable for any
damage caused by the use of or the measurement(s) obtained
by the operator.
●ATAGO is not liable for any loss and damage caused by the
measurement and use of this instrument.
●The prism is considered a consumable item and a charge will
be incurred for the replacement of this part.
●All instruments received for repair are subject to a possible
inspection fee. ATAGO does not warrant the problems which are
caused by user's fault even though the unit is under warranty.
2351-E07
Access now ⇒
series
(Cat.No. 2381, Brix 0.0 to 20.0%)
(Cat.No. 2311, Brix 0.0 to 33.0%)
Eyepiece
c The eyepiece and daylight
plate are user replaceable.
Please contact an ATAGO
distributor to place an order or
for any inquiries.
Name Part #
Eyepiece RE-2311-12M
Daylight plate RE-2315-60M
Small volume
RE-2311-67M
daylight plate
Caution