Extech Instruments RF153 User Manual

USER MANUAL

RF153 Brix Meter

User Manual Translations available

at www.extech.com

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Table Contents

1. Introduction 3

2. Safety 4

3. Specifications 8

4. Product Descriptions 10

5. Operation 12

6. Maintenance 20

7. Customer Support 22

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1. Introduction

Thank you for selecting the Extech RF153
Brix Meter. We ship this meter fully tested.
With proper use, it will provide years of
reliable service.

1-1 Features

• Wide measurement range (Brix 0~53%)

• Sugar content (Brix%) display

• Refractive Index (RI) measurement

• High resolution (Brix 0.1%)

• Auto Temperature Compensation ATC

• Dual LCD display

• Low power consumption

• IP65 Splash/Dust-proof

• Automatic measurement function

• Memory mode automatically stores up to

10 readings

• Sapphire coating is abrasion and
corrosion-resistant

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1-2 Applications

• Sugar, food and beverage production
inspection (fruit juices, soft drinks).

• Measure sugar concentration in cane,
fruits, vegetables, etc.

• Measure sugar content of fruit and plants
to determine maturity (helpful in seed
selection, and fertilization).

• For use in canning factories, breweries,
beverage plants, etc. for quality control
inspections to determine the degree of
sugar (Brix).

• For use in restaurants for sweetness
control.

• Control the concentration of industrial
fluids (cutting coolants, hydraulic fluids,
and antifreeze) to prevent corrosion.

2. Safety

Read the following safety information
carefully before attempting to operate or
service the meter. Only qualified personnel
should perform repairs.

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2-1 Safety Symbols

CE Certification.

Restricts the use of six
substances within electrical and electronic
equipment (EEE).

REACH（SVHC） This device does not

use materials or substances identified by
REACH to be potentially harmful or
hazardous.

IP (Int’l Protection Classification)

Conforms to the IP65 waterproof

specification.

You, as the end user, are legally bound (EU

Battery ordinance) to return all used batteries, disposal
in the household garbage is prohibited! You can hand

over your used batteries / accumulators at collection points
in your community or wherever batteries / accumulators are
sold!

Disposal: Follow the valid legal stipulations in respect of
the disposal of the device at the end of its lifecycle.

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2-2 Warning

To avoid injury:

• Please read the manual carefully to

ensure safe and correct use of this
device.

• Do not disassemble or modify the meter.

• Do not attempt to repair the meter. Only

qualified personnel may do so.

• This is high precision device, do not

apply excessive force or pressure to the
LCD or prism. Avoid shock and vibration.

• Do not use this meter near magnets or

magnetic fields.

• Do not use the meter near an open flame

or in flammable environments.

• Do not use thi s meter where the ambient

temperature exceeds the recommended
range of 10°C (50ºF) to 40°C (104ºF) or
in areas where the Relative Humidity
exceeds 80%.

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• If the temperature of the liquid that you

wish to measure is extreme, allow it to
settle to a workable temperature before
use.

• Do not use metal tools when sampling.

Metals can damage the prism surface.

• The prisms are coated for protection; do

not use acetone to clean the prism, as
this will harm the coating.

• After use, please follow the user manual

instructions for cleaning the prism. Close
the prism cover when storing.

• If the meter is to be stored for a long

period, remove the battery and close the
prism cover.

• Never use organic solvents for cleaning.