Tree MRB 500g User manual

Professional
Weighing Equipment
MRB Series Mid Resolution Balances
Compact Scales
MRB 500g
MRB 1200g
MRB 2500g
MRB 6000g
MRB 10000g
Operation Manual

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Table of Contents
Section Page
Declaration of Conformity 3
Customer Service 4
Introduction 4
Safety 5
Weight Scale 6
Functions 7
Scale Description 8
Application & Conformity 9
Getting Started 9
Delivery 10
Assembly & Installation 10-11
Application Menu 11-12
Calibration 12-13
Maintenance & Service 13
Transportation & Storage 14
Warranty 14

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Declaration of Conformity
Declaration of conformity for apparatus with CE mark
We hereby declare that the product to which this declaration refers conforms to the
following standards.
Electronic scale:MRB Compact Scales
Models
MRB 500g
MRB 1200g
MRB 2500g
MRB 6000g
MRB 10000g
Mark applied
EU Directive
Standards
2004/108/EC
EN 61326-1: 2006
Signature:
Boon Lim, R & D Manager
Date: 14. 11. 2012
LW Measurements LLC, 3510 Industrial Drive, Unit H Santa Rosa, CA 95403

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Customer Service
USA
LW Measurements LLC, 3510 Industrial Drive,
Unit H Santa Rosa, CA 95403
USA
Tel: [phone]
Fax: [phone]
http://lwmeasurements.com
EUROPE
LW Measurements Europe Ltd
Chalkwell Park House 700 London Road
Westcliff-on-Sea Essex SS0 9HQ
United Kingdom
Tel: [phone]
Fax: [phone]
http://lwmeasurements.com
Introduction
What you should know about this Operation Manual:
Tree® Professional Weighing Equipment products are simple to operate.
Nevertheless, you should read through these operating instructions in their entirety, so
that you can make optimum use of the full potential of the weighing scale in your daily
work activities.
These operating instructions contain guidance in the form of pictograms and keyboard
diagrams, which should help in finding the required information:
For the labeling of potential hazards, please refer to the Safety proportion of this
operation manual.

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Safety
Representations & Symbols
Note: Important instructions, which involve safety, are highlighted with the appropriate
mark:
Safety recommendations
When using the weighing equipment in surroundings with increased safety
requirements, the corresponding regulations must be observed.
The weighing scale may only be used with the power adapter supplied.
Before connecting the power adapter to the scale, the user must ensure that the
operating voltage stated on the power adapter is compliant with the mains voltage.
If not, please contact Customer Service at the address above.
If the power adapter or its cable is damaged, the weighing scale must immediately be
disconnected from the electricity supply (pull out the power adapter).
If there should be any reason to believe that it is no longer safe to operate the scale, it
should be immediately unplugged from the electricity supply (pull out power adapter)
and secured against inadvertent operation.
In carrying out maintenance work, it is essential to follow the recommendations set out
in maintenance and servicing.
The weighing scale must not be operated in an area subject to explosion risks.
Care must be taken when weighing liquids to ensure that no liquid is spilled into the
inside of the scale or into connections on the rear of the equipment or the power
adapter. If liquid is spilled on the scale, it must immediately be unplugged from the main
electricity supply (pull out power adapter).
The weighing scale may be operated after it has first been inspected by a service
technician.
These operating instructions must be read by each user and should be easily
accessible at the workplace at all times.

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Weight Scale
Construction & Functions
The weighing scale consists of the following parts;
The Scale body (1)
Scale pan (2)
The adapter
Operation manual
2
1

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Functions
Technical Data
Features
Auto zero tracking

Auto shut off

Low battery indication

Large LCD (6 digits, 15 mm high)

Large square weighing pan

Auto calibration

Selectable auto backlight

Net weight indication

Weighing units: kg,g, lb., oz., lb:oz
1/2000~1/15000 division available
Model number
Capacity
Division
Weighing pan
Size
MRB 500
500 g
0.1 g
175 x 160 mm
MRB 1200
1200 g
0.1 g
175 x 160 mm
MRB 2500
2500 g
0.1 g
175 x 160 mm
MRB 6000
6000 g
1 g
175 x 160 mm
MRB 10000
10000 g
1 g
175 x 160 mm
Package
29.8 x 21.6 x 8.8.5 (cm
3
)
(Standard
carton)
Package
12 Units in one box: 61×48.5×38 (cm
3
)
(Master carton)
Operating
0-40Cº
Temperature
6 x AA batteries or AC/DC
Power Source
Adapter 9V / 100mA

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Scale Description
Weighing platform
Battery
Compartment
Cover
Battery Compartment
Batteries 6 AA
(Not included)
AC adapter socket
Weighing Units
Stable Indicator Zero Indicator Tare Indicator Low Battery

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Application & Conformity
The Following are instructions of how to correctly use the weight scale:
The weighing scale may only be used for the weighing of solid-materials and of liquids
filled into secure containers.
The maximum capacity load of the weighing scale must never be exceeded, otherwise
the weighing scale may be damaged.
In using the weighing scale in combination with other devices as well as with devices
produced by other manufacturers, the appropriate regulations for the safe use of the
relevant attachments and their application in accordance with instructions must be
observed.
The weighing scale has been manufactured and tested in accordance with the
standards and recommendations set out in the declaration of conformity.
The power adapter supplied for the weighing scale complies with the appropriate
electrical protection class.
The following applies to all MRB series weighing machines:
Power supply:
Input: 120V or 230V AC (+/-15-20%); 60Hz

Output: 9v DC 100mA
Allowable ambient conditions:
Temperature: 0°C - 40°C / 32 - 104ºF

Relative humidity: 25% - 85%, non-condensing
If you have any questions on the technical data or require detailed technical information
on your balance, please contact your technical representative
Getting Started
The scale is packaged in an environmentally-friendly carton, which provides optimum
protection for the balance during transportation.
We suggest that you keep the original packaging in order to avoid damage if you are
shipping or transporting the scale to a different location. It is also the best way to keep it
in the best conditions if it will not be used for an extended period of time.
In order to avoid damage, please follow the instructions provided below, when
unpacking the scale:

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Unpack the scale carefully.
When outside temperatures are very low, the scale should be stored for a couple
hours and kept in its box in a dry room at normal temperature, so that no
condensation settles on the unit when opening the box.
Check the scale immediately after unpacking for any external visual damage. If
there is any damage on scale, contact customer service immediately.
If the scale is not to be used immediately after purchase, it should be stored in a
dry place where fluctuations in temperature are low. (Reference pg.).
Read through these operating instruction, before you work with the unit and pay
attention to the Safety recommendations (reference Safety pg. 6).
Delivery
Inspect delivery for completeness immediately upon unpacking all components.
Checklist for complete delivery
Component delivered present yes / no
Weighing unit body
Weighing pan
Power adapter
Operating manual
Assembly & Installation
The weighing scale is delivered in a partly dismantled condition. Assemble the individual
components in the following sequence:
Place your machine on a level, clean, and dry surface to obtain accurate
readings.
Place the plastic platter on top of the scale, flat side facing up so the platter
sits firmly on the machine with the four “legs” inserted into the corresponding
four receptacles.
Place the stainless steel platter on top of the plastic platter with the flat side
facing up.
Unwrap and place the clear plastic bowl, open side facing up, on top of the
stainless platter.
Connecting the AC Adapter
The following Safety recommendations must be observed when connecting the balance:

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The Scale should only be connected to the mains voltage socket with the power adapter
supplied. Check before connecting the power adapter to the mains socket, that the
operating voltage stated on the power adapter complies with the local mains voltage.
If the operating voltage is not the same as the mains voltage, the power adapter must
not be connected to the mains socket and contact customer service.
Placement of Scale
The location in which the scale is placed is very important in order for the scale to work
to its full potential. Certain conditions can affect the capabilities of the scale, conditions
like: the presence of air flow, variations in temperature, and direct sunlight. Please
follow the recommendations given below in choosing a location to place your scale.
Place the scale on a solid, firm and preferably vibration-proof, horizontal base
Make sure that the weighing machine cannot be shaken or knocked over
Protect from direct solar radiation
Avoid drafts and excessive temperature fluctuations
Avoid placing the scale near or on any magnetic surfaces.
Application Menu
Function settings
To enter the function setting mode, press the ON/OFF key to turn the power off. Then
press and hold the ZERO key and then press the ON/OFF key again. The display will
show A_ON or A_OFF
Auto backlight mode
Press the UNIT key, the display will show L_ON, L_OFF, or L_Au. Press the ZERO key
to select. L_ON means the auto backlight function is active. L_OFF means the auto
backlight function is inactive, and L_Au means the auto backlight function is on Auto
Key Functions
ON/OFF KEY is used to turn the Scale on or off.
ZERO KEY sets or re-adjusts the machine into the correct zero position.
Zero Range: 0-10% of full capacity
TARE KEY subtracts the gross weight on the platter (box or container, etc) to the
tare weight.
Tare Range: 10- 100% of full capacity. Multiple TARE allowed within
capacity.


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UNIT KEY is used to toggle between different weighing units.
Clearing tare weight
Place an empty container on the platter. Press the TARE key. The WEIGHT
display shows 0.000.
When the container is removed from the platter, the WEIGHT display will show a minus
(-) value which is the weight of the container
Clearing previous tare value
Remove the weight from the platter then press the TARE key so that the TARE indicator
will turn off and the WEIGHT display returns to Zero.
Weighing procedures
Whenever possible, before weighing, please allow the weighing machine to warm up
for at least 10 minutes after turning it on. This will help to ensure optimal functioning
and operation.
Press the ON/OFF key to turn on the weighing machine. The display will show all
segments for a few seconds and then the “0” will appear.

Press the UNIT key to select the desired weighing unit –“kg”, “g”, “lb”, “oz”, “lb:oz”.

To begin weighing, place the objects to be weighed in a weighing container
or directly on the platter.

The stable indicator will display when the reading becomes stable.
Calibration
Note: Calibration is done in the factory. Don’t re-calibrate the machine unless it is not
accurate. The weighing machine should be allowed to warm up for at least 10 minutes
before calibration.
Before entering calibration mode, press the ON/OFF key to turn the power on
for 1 minute.
Next press the ON/OFF key again to turn the power off.
Press and hold the UNIT key and then press the ON/OFF key. The display will
show “CALu=”.
Press the UNIT key to select the calibration weight units ( g, lb, etc). Press the
ZERO key to select the calibration weight. The display will show xxxxx. The X
will be flashing. Press the UNIT key to move the flashing digit to the right. Press
the TARE key to increase the flashing digit.

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NOTE: X is the calibration weight which can be set according to your
requirements. The weight needed when re-calibrating your Tree scale needs to
be at least half (1/2) of the capacity of the scale with two thirds (2/3) being ideal
as this will give you the most accurate reading.
(Ex: For a 10,000g scale you would need at least 5,000g)
Press the Zero key to confirm the calibration weight. The display will show CAL
and then the AD value. Once the stable indicator “(.)” is displayed, press the
UNIT key. The display will flash the calibration weight.
Place the calibration weight on the platter. After the stable indicator
“(.)” is displayed, press the UNIT key. The display will show “--------“, then the AD
value. The calibration is now finished.
To return to the weighing mode, press the ON/OFF key to turn the power off.
Press the ON/OFF key again to turn on the power and return the machine to
weighing mode. Place the weight on the platter again to ensure the weighing is
correct. If not, repeat the calibration process.
Maintenance & Service
For maintenance-work, the balance must be disconnected from the power supply
(remove power adapter plug from socket). Also ensure that the balance cannot be
connected to the power supply during the work by a third party.
Make sure that no liquid spills into the scale while performing maintenance work. If
liquid is spilled on the scale, it must be inspected by a service technician.
Regularly perform maintenance to the weighing pan and the weighing pan holder by
removing any dirt or dust from under the weighing pan and on the weighing scale
housing. Use a soft brush or a soft, lint-free cloth, moistened with a mild soap solution
Never use solvents, acids, alkalis, paint thinners, scouring powders or other aggressive
or corrosive chemicals for cleaning; these substances can cause damage to the
surfaces of the scale housing.

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Transportation & Storage
Your weighing machine is a precision instrument, treat it carefully. Avoid shaking,
severe impacts and vibration during the transportation. Make sure that there are no
marked temperature fluctuations during the transportation and that the weighing
machine does not become damp (condensation).
If you would like to take the weighing machine out of service for an extended period,
disconnect it from the electricity supply, clean it thoroughly (refer to Maintenance &
Service) and store it in a place which meets the following conditions:
No violent shaking, no vibrations
Minimum temperature fluctuations
No direct solar radiation
Minimum moisture
Warranty
The products are under warranty against factory defects for a period of two (2) years
from the date of shipment.
For Customers within the lower 48 states of the continental United States. LW
Measurements will pay for fright both ways for the first 30 days after purchase. After 30
days expire the customer is responsible for shipping the product back to us. After the
product is received we will inspect it and as necessary we will repair or replace and will
ship the product back to the customer at our expense.
Any new scales returned for warranty must be properly packaged in the original box. If
they are not properly packed an in the original box, the customer pays for shipping cost.
If we determine there is a factory defect, we will pay for the shipping back. If we
determine that it is not a factory defect, the customer will pay shipping.
For Customers outside the lower 48 States, including Mexico, Canada, Puerto Rico,
Hawaii, Alaska and all other countries, customers must pay for shipping.
Our warranty does not cover misuse or neglect including but not limited to battery or
water damage, overloading, and chewed or cut wires. If the product is found to have
been misused or damaged by the customer, LW measurements is not responsible for
the cost of return.
For warranty claims please go online to lwmeasurements.com and fill out the warranty
submission form or call your customer service representative.