DCT SERIES
DUAL COUNTING SCALE
Professional Weighing
Equipment
Operating Manual
Final Rev 2013.12.20 1
Mark applied
EU Directive
Standards
2004/108/EC
EN 61326-1: 2006
Available Models:
DCT-50
DCT-100
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: DCT Dual Counting Scale
Date: 14. 11. 2012 Signature:
Boon Lim, R & D Manager
LW Measurements LLC, 3510 Industrial Drive, Unit H Santa Rosa, CA 95403
Final Rev 2013.12.20 2
Identification
Customer Service
USA
LW Measurements LLC, 3510 Industrial Drive,
Unit H Santa Rosa, CA 95403
USA
Tel: (707) 542-2185
FAX: (707) 542-3285
EUROPE
LW Measurements Europe Ltd
Chalkwell Park House 700 London Road
Westcliff-on-Sea Essex SS0 9HQ
United Kingdom
Tel: 01702-476700
Fax: 01702-477380
ASIA
LW Measurements PTY Ltd
Block 1004, Toa Payoh North
#03-16 Singapore 318995
Tel: (65) 6458 3438
HP: (65) 8119 3401
http://www.lwmeasurements.com
Refer to our website for information about local customer service centers and details of their
addresses.
Final Rev 2013.12.20 3
Introduction
What you should know about these Operating Instructions:
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 and the diverse possibilities of the weighing machine in your daily work.
These operating instructions contain guidance in the form of pictograms and keyboard diagrams, which
should help you in finding the required information:
For the labelling of potential hazards and advice, please see Safety below.
Final Rev 2013.12.20 4
Contents
Section
Heading
1
Safety
1.1 Representation and symbols
1.2 Safety recommendations
2
Your weighing machine
2.1 Construction and functions
2.1.1 Construction of the weighing machine
2.1.2 Functions of the weighing machine
2.2 Application, conformity
2.2.1 Correct use of the weighing machine
2.2.2 Conformity
2.3 Data and parameters
2.3.1 Technical data
3
Getting started with your weighing machine
3.1 Unpacking the equipment
3.2 Scope of delivery
3.3 Assembling your weighing machine
3.4 Choice of a suitable location
3.5 Checking the mains voltage
3.6 Leveling the weighing machine
3.7 Calibration of the weighing machine
4
Working with the application menu using the intelligent keypad
4.1 Display messages and key functions
4.1.1 Display messages
4.1.2 Key functions
4.2 Program options
4.2.1 Pieces counting
4.2.1.1 Counting with a known sample weight
4.2.1.2 Counting without a known sample weight
4.2.2 Select a pre-stored unit weight
4.2.3 High/Low Check Weighing when Counting
5
Calibration - using an external calibration weight
6
Maintenance and service
7
Transport and storage
7.1 Transportation and shipping
7.2 Storage
Final Rev 2013.12.20 5
1 Safety
1.1 Representations and symbols
Important instructions, which involve safety, are highlighted with the appropriate mark:
1.2 Safety recommendations
When using the weighing equipment in surroundings with increased safety requirements, the
corresponding regulations must be observed.
The weighing machine may only be used with the power adapter supplied exclusively for use with the
weighing machine.
Before inserting the power adapter, the user must ensure that the operating voltage stated on the power
adapter agrees 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 machine must immediately be disconnected
from the electricity supply (pull out the power adapter).
The weighing machine may only be operated from mains electricity supply with a power adapter which is
in perfect condition.
If there should be any reason to believe that it is no longer possible to operate the weighing machine
without danger, the weighing machine is to 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 in Chapter 6 Maintenance
and service.
The weighing machine must not be operated in an area subject to explosion risks.
Care must be taken when weighing liquids to ensure that no liquid is spilt into the inside of the weighing
machine or into connections on the rear of the equipment or the power adapter. If liquid is spilt on the
weighing machine, it must immediately be unplugged from the mains electricity supply (pull out power
adapter).
The weighing machine may only be operated again after it has first been re-checked by a service
technician.
These operating instructions must be read by each operator of the equipment and must be available at
the workplace at all times.
Final Rev 2013.12.20 6
Figure 2.1 Your weighing machine
3 2 1
2 Your weighing machine
2.1 Construction and functions
2.1.1 Construction of the weighing machine
The weighing machine consists of the weighing machine body (1), the scale-pan (2), the adapter (3) and
this operating manual.
2.1.2 Functions of the weighing machine
Final Rev 2013.12.20 7
The DCT Series are high-quality electronic precision weighing machines designed to function as counting
Model number
Capacity
Division
Weighing pan Size
DCT-50
50lb/2lb
0.001 lb/0.00005lb
345x260/114x114mm
DCT-100
100lb/4lb
0.002lb/0.0001lb
345x260/114x114mm
Package
(Standard carton)
Package
(Master carton)
2 Units in one box
Operating
Temperature
0°C - 40°C (32-104℉)
Power source
Rechargeable batteries or AC/DC
Adapter 10-12V/500mA
scales with the following specifications.
Specifications:
Final Rev 2013.12.20 8
Figure 2.2 Details of your weighing machine
Large weighing pan
Bright back-lit display
Small weighing pan
Keypad
The built-in versatile weighing programs allow you to use the DCT-Series weighing machines not only for
accurate weighing but also for components counting.
FEATURES
Auto zero tracking
Intelligent applications: weight unit conversion, parts counting
Low battery indication
Large LED
Large heavy gauge stainless steel square pan
Second smaller heavy gauge stainless steel pan
Stability indication
Auto calibration
Selectable auto back light
Unit switching kg or lb
Variable kg or lb reference weight calibration software
1.3 million internal resolution
30,000 display resolution
24 bit A/D processor
Highest quality sensor used
Die cast aluminum sub-support bottom sensor support and steel thread footing
Final Rev 2013.12.20 9
Power
Connection
USB Port
Leveling feet
RS232 Port
On/Off Switch
SCALE 3 Port
Final Rev 2013.12.20 10
2.2 Application, conformity
2.2.1 Correct use of the weighing machine
The weighing machine may only be used for the weighing of solid-materials and of liquids filled into
secure containers.
The maximum allowable load of the weighing machine must never be exceeded; otherwise the weighing
machine may be damaged.
In using the weighing machine in combination with other appliances as well as with appliances 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.
2.2.2 Conformity
The weighing machine has been manufactured and tested in accordance with the standards and
recommendations set out in the declaration of conformity.
The power adapter produced for the operation of the weighing machine and intended exclusively for this
application complies with the appropriate electrical protection class.
2.3 Data and parameters
2.3.1 Technical data
The following applies to all DCT series weighing machines
Power supply:
. Input: 110 or 230V AC (+/-15-20%); 50 to 60Hz
. Output: 10-12v DC 500mA
Allowable ambient conditions
Temperature: 0°C - 40°C
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.
Final Rev 2013.12.20 11
Component delivered present yes / no
Weighing unit body
Weighing pan(s)
Power adapter
Operating manual
3 Getting started with your weighing machine
3.1 Unpacking the equipment
The machine is delivered in an environmentally-friendly carton, specifically developed for this precision
instrument, which provides optimum protection for the balance during transportation.
We suggest that you retain the original packaging in order to avoid transportation damage if re-shipping
or transporting the balance and to allow the unit to be stored in the best conditions if it is out of operation
for an extended period.
In order to avoid damage, attention must be given to the following points when unpacking the balance:
Unpack the weighing machine carefully. It is a precision instrument.
When outside temperatures are very low, the balance should first be stored for some hours in the
unopened transport package in a dry room at normal temperature, so that no condensation settles on the
unit when unpacking.
Check the weighing machine immediately after unpacking for externally visible damage. If you should find
transport damage, please inform your service representative immediately.
If the unit is not to be used immediately after purchase but only at a later time, it should be stored in a dry
place where fluctuations in temperature are as small as possible (see Chapter 7 .Transport, storage.).
Read through these operating instructions, even if you already have prior experience with weighing
equipment, before you work with the unit and pay attention to the Safety recommendations (see Chapter
1 .Safety).
3.2 Scope of delivery
Inspect delivery for completeness immediately on unpacking all components.
Checklist for complete delivery
Final Rev 2013.12.20 12
3.3 Assembling your weighing machine
The weighing machine is delivered in partly dismantled condition. Assemble the individual components in
the following sequence:
Place the unit holder in position and add the weighing pan
Insert the power adapter cable plug into the socket at the rear of the balance.
3.4 Choice of a suitable location
The environment in which your weighing machine is used is very important. Air movement, temperature
changes, vibrations, direct sunlight, etc. all influence the performance of high precision weighing
machines. Therefore, place your weighing machine on a solid, sturdy surface that is free of air currents,
vibration and not in direct sunlight. The surface should not be magnetic and should be located away from
doors, windows, heaters, air conditioners and fans.
To summarize:
Put the weighing machine 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
3.5 Checking the mains voltage
The following Safety recommendations must be observed when connecting the balance to the mains:
The balance may only be operated with the power adapter supplied.
Check before connecting the power adapter to the mains supply, that the operating voltage stated on the
power adapter agrees with the local mains voltage.
If the operating voltage is not the same as the mains voltage, the power adapter must on no account be
connected to the mains supply. Contact customer service.
Final Rev 2013.12.20 13
3.6 Leveling the weighing machine
To function properly, the balance must be precisely horizontal. The balance is fitted with one bubble level
and adjustable feet for level-control, with the aid of which it is possible to compensate for small height
differences and / or any unevenness in the surface on which the balance is positioned.
The screw feet must be adjusted so that the air bubble is precisely in the center of the sight glass of the
bubble level (see Fig. 1)
Place the scale horizontally and keep the bubble inside the bubble level aligned with the red circle (See
Fig.1). In order to get exact measurements, the balance must again be carefully leveled after each
relocation.
Fig. 1 Correct leveling with the aid of the bubble level and adjusting feet.
ER
3.7 Calibration of the weighing machine
Since the Earth’s gravity is not the same everywhere, each balance must be adjusted to compensate for
the gravity differences at each location in accordance with the underlying physical weighing principles.
This adjustment process, known as calibration and must be carried out on initial installation and after
each subsequent relocation.
In order to ensure exact measurements, it is recommended that the balance should be calibrated
regularly using a known external calibration weight (see Section 5 below).
Final Rev 2013.12.20 14
4 Working with the application menu using the Key-Pad
4.1 Display messages and key functions
4.1.1 Display messages
1. Kg: unit of measure
2. lb: unit of measure
3. stb: stable indication
4. zero: ZERO INDICATOR turns on when scale is in Zero position
5. tare: TARE INDICATOR turns on when this function is used
6. LoUW: turns on when sample unit weight is not heavy enough for accurate counting
7. LoWT: turns on when sample number is not enough for accurate counting
8. M+: is used when accumulating the counts data; this data is memorized by pressing this key and
can be accumulated up to 99 times.
Final Rev 2013.12.20 15
9. S1: SCALE 1 working state
10. S2: SCALE 2 working state
11. S3: SCALE 3 working state
12. LoB: low voltage, please charge battery
13. CHG: charged state, red LED lights up when charging, when the battery is fully charged, Red and
Green LED lights flash alternately.
4.1.2 Key functions
1. SCALE/SELECT: Press this button to select available counting scale among scale 1, scale 2, and
scale 3. You can only choose to use one of them at a time.
SCALE 1: Main counting scale, the bigger platform
SCALE 2: Smaller counting scale offers more accuracy
SCALE 3: Extra connection platform. When we get the sample weight from SCALE 2, we
can use this platform to count more samples.
2. UNIT key changes the weight units between kg and lb
3. ZERO key sets display to zero or subtract the container weight. The zero range is <10% of full
capacity. ZERO LED indicator will illuminate when you active the ZERO function.
4. TARE key subtracts the weight of a container placed on the weighing platform. The tare range is
<100% full capacity. Press the TARE key to enable the Auto-Tare function, the TARE LED
indicator will illuminate when you activate the TARE function.
5. PRINTER key is used to transmit data to a printer, computer, or other device.
6. ENTER key has the same function as it would on a computer keyboard.
7. MEM/STORE key is the SAMPLE WEIGHT MEMORY KEY. Press this key to memorize sample
weight, scale can memorize up to 16 different sample weights.
8. MEM/READ key is the SAMPLE WEIGHT READ KEY. Press this key to recall the memorized
sample weight, if more than one sample weight is memorized continue to press this key until the
correct sample weight is selected.
9. [M+] MEMORY KEY is used when accumulating the counting data. This data is memorized by
pressing this key and can be accumulated up to 99 times.
10. MC key is used to clear out the accumulated counting data.
11. SAMPLE key is used when setting the counted number of samples on the platter into the scale
memory.
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12. UNIT WEIGHT is used when setting the known unit weight data into the scale during normal
operation. (1/1000kg or 1/1000lb)
13. QTY/SET key is used when wanting to switch between the pieces counting function and quantity
check weighing function.
14. NUMERIC (0-9) keys are used for setting numeric data for sample numbers, sample weights or to
set a limit for the HI/LO settings.
15. [*] Key is used to change the division when the scale is in SCALE 3 mode.
16. TOTAL key displays the accumulated total pieces on the scale
17. ESC key is used to exit from the current menu
18. CE key is used for cancelling the numeric setting data or cancels the previous unit weight data.
4.2 Program options
Besides performing accurate simple weighing, your versatile weighing machine can also perform pieces
counting
4.2.1 Pieces counting
4.2.1.1 Counting pieces with known sample unit weight
- Turn scale on
- Wait for "0" to appear on the display.
- If necessary, press ZERO key to set the display to “0”
- Key in unit weight, press UNIT WEIGHT key to confirm
-Store the unit weight by pressing MEM/STORE key, display will show a flashing number for
example “01”, this is the location where the stored sample unit weight can be found. Press [*] key
to toggle between 01-16, press the ENTER key to confirm the selection.
- Press the SCALE/SELECT key to select either SCALE 1 or SCALE 3, be sure to place the
additional pieces on the scale that is selected.
***NOTE: The items being weighed should be within the selected scales capacity.
Final Rev 2013.12.20 17
4.2.1.2 Counting pieces without known sample unit weight
- Turn scale on
- Wait for "0" to appear on the display.
- If necessary, press ZERO key to set the display to “0”
- Press SCALE/SELECT key to select SCALE 2, press ENTER to confirm
-Put a pre-known number of samples onto SCALE 2, key-in the known number using the numeric
keypad.
- Press SAMPLE to get the sample unit weight
- Press the SCALE/SELECT key to select either SCALE 1 or SCALE 3, be sure to place the
additional pieces on the scale that is selected, it will display the total number of items.
***NOTE: The items being weighed should be within the selected scales capacity.
4.2.2 Select a pre-stored unit weight
Key in the number of the pre-stored weight (01-16) using the numeric key pad, press MEM/READ key
and select the pre-stored sample unit weight, press ENTER to confirm.
4.2.3 High/Low Check Weighing with Counting
- Turn scale on
- Wait for "0" to appear on the display.
- If necessary, press ZERO key to set the display to “0”
- Press QTY/SET key, display will show CH=OFF or CH=ON
- Press the ENTER key to select “ON”
- Press [*] key, display will show a flashing “0” at UNIT WEIGHT, key in the lower limit using the
numeric key pad, press [*] gain, display will show a flashing “0” at TOTAL, key in the upper limit
using the numeric keypad.
-Press QTY/SET key to confirm the setting and return to weighing mode.
- Press the SCALE/SELECT key to select either SCALE 1 or SCALE 3, be sure to place the
additional pieces on the scale that is selected.
***NOTE: When adding items onto the scale, the scale will beep in a particular tone if the weight
(number of items) is less than the lower limit and beep in another tone if it is higher than the
upper limit.
Final Rev 2013.12.20 18
5 Calibration - Using an External Calibration Weight:
Calibration is required when the weighing machine is initially installed or if the scale is moved to a
substantial distance from the original location. 10 minutes warm up of scale is always needed before
calibration.
5.1 Scale 1 Calibration
- Turn on scale
- As the scale is counting down, press the following buttons in order [1], [3], [1], [1] then
press ENTER
- Display will show the following: ‘WEIGHT DISPLAY’ shows SCALE 1, ‘UNIT WEIGHT’
shows CAL-0, ‘TOTAL DISPLAY’ will show A/D value
- Press UNIT key to select whether you will calibrate in kg or lb
- Press ENTER to set zero point (UNIT WEIGHT will show CAL-0 flashing for a few
seconds and then changes to XXXX to set the calibration weight)
- Press [CE] key and then press the corresponding number buttons based off of the amount
of weight you are using to calibrate (example: if you are using 5lbs to calibrate the scale you
would key in 5lbs).
- Calibration weight will show in the UNIT WEIGHT display.
- Press the ENTER key, the UNIT WEIGHT display will show flashing XX and then changes
to XX.XXX lb. Once this occurs the calibration process is complete.
- ***Note: Make sure nothing is loaded on the platform before you are asked to place the
calibration weight. Once calibration is complete you will need to reboot the scale and place
the sample test weight on the platter to assure the calibration was completed correctly.
5.2 Scale 2 Calibration
- Turn on scale
- As the scale is counting down, press the following buttons in order [1], [3], [1], [2] then
press ENTER
- Display will show the following: ‘WEIGHT DISPLAY’ shows SCALE 1, ‘UNIT WEIGHT’
shows CAL-0, ‘TOTAL DISPLAY’ will show A/D value
- Press UNIT key to select whether you will calibrate in kg or lb
Final Rev 2013.12.20 19
- Press ENTER to set zero point (UNIT WEIGHT will show CAL-0 flashing for a few
SCALE 3 DB9
Load Cell DB9
1 S-
1 S-
2 S+
2 S+
3/6 V+
3/6 V+
4 V-
4 V-
5 GND
5 GND
7-9 NC
7-9 NC
seconds and then changes to XXXX to set the calibration weight)
- Press [CE] key and then press the corresponding number buttons based off of the amount
of weight you are using to calibrate (example: if you are using 1lb to calibrate the scale you
would key in 1lb).
- Calibration weight will show in the UNIT WEIGHT display.
- Press the ENTER key, the UNIT WEIGHT display will show flashing XX and then changes
to XX.XXX lb. Once this occurs the calibration process is complete.
- ***Note: Make sure nothing is loaded on the platform before you are asked to place the
calibration weight. Once calibration is complete you will need to reboot the scale and place
the sample test weight on the platter to assure the calibration was completed correctly.
5.3 Scale 3 Calibration
- First make a connection to SCALE 3 through DB9
- Turn on scale
- As the scale is counting down, press the following buttons in order [1], [3], [1], [3] then
press ENTER
- The following must be completed befor;e beginning the calibration process for SCALE 3:
- WEIGHT DISPLAY shows SCALE 3
- UNIT WEIGHT shows “xxxx” (this is the full capacity of SCALE 3)
- TOTAL DISPLAY will show “d=xx” (this is the division of SCALE 3)
- Press UNIT key to select full capacity in kg or lb
Final Rev 2013.12.20 20
- Press CE Key to set the full capacity – key in the number through the numeric keypad
- Press (*) to set the division – key in the number through the numeric keypad
- Press ENTER to confirm
- Now begin the CALIBRATION process:
- Press UNIT key to select whether you will calibrate in kg or lb
- Press ENTER to set zero point (UNIT WEIGHT will show CAL-0 flashing for a few
seconds and then changes to XXXX to set the calibration weight)
- Press [CE] key and then press the corresponding number buttons based off of the amount
of weight you are using to calibrate (example: if you are using 1lb to calibrate the scale you
would key in 1lb).
- Calibration weight will show in the UNIT WEIGHT display.
- Press the ENTER key, the UNIT WEIGHT display will show flashing XX and then changes
to XX.XXX lb. Once this occurs the calibration process is complete.
- ***Note: Make sure nothing is loaded on the platform before you are asked to place the
calibration weight. Once calibration is complete you will need to reboot the scale and place
the sample test weight on the platter to assure the calibration was completed correctly.
6 Maintenance and service
The weighing machine must be treated carefully and cleaned regularly. It is a precision instrument.
For maintenance-work, the balance must be separated from the power supply (remove power adapter
plug from socket). Also ensure that the balance cannot be reconnected to the power supply during the
work by a third party.
Take care during cleaning that no liquid penetrates into the appliance. If liquid is spilt on the balance, the
latter must immediately be disconnected from the electricity supply. The balance may only be used again
after it has first been checked by a service engineer.
The connections on the rear of the appliance and the power adapter may not come into contact with
liquids.
Regularly dismantle the weighing pan and the weighing pan holder and remove any dirt or dust from
under the weighing pan and on the weighing machine housing with a soft brush or a soft, lint-free cloth,
moistened with a mild soap solution. The scale and the holder can be cleaned under running water. Take
care that both parts are completely dry before they are re-installed on the scale.
Final Rev 2013.12.20 21
Never use solvents, acids, alkalis, paint thinners, scouring powders or other aggressive or corrosive
chemicals for cleaning, since these substances attack the surfaces of the scale housing and
can cause damage.
Final Rev 2013.12.20 22
7 Transport, storage
7.1 Transportation and shipping of the weighing machine
Your weighing machine is a precision instrument. Treat it carefully. Avoid shaking, severe impacts and
vibration during the transportation.
Take care that there are no marked temperature fluctuations during the transportation and that the
weighing machine does not become damp (condensation).
7.2 Storage of the weighing machine
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 (see Section 6.Maintenance and servicing.) 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
The weighing machine should preferably be dispatched and transported in the original packaging to avoid
transportation damage.
The weighing machine should preferably be stored in the original packaging, since this provides optimal
protection for the weighing machine.
Final Rev 2013.12.20 23
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