Pesalia DW-PT User manual

P/N: DwPtUser02.doc
COUNTING SCALE - TOTALIZER
INDICATOR: DW-PT
WEIGHT - TARE
USER’S GUIDE

Página: 1 / 12 DW-PT
CONTENS
Packing content................................................................2
Technical features. ...........................................................2
General...........................................................................2
Metrology. ......................................................................2
Installation and Security. .................................................3
Installation. ....................................................................3
Warnings..............................................................................3
Security prescriptions...........................................................3
Power supply tension...........................................................3
Wiring of the signals............................................................3
Security. .........................................................................3
Prescriptions.........................................................................4
In case of fire. ......................................................................4
Connections. ........................................................................4
Operating modes of the indicator. ..................................5
Display modes...................................................................5
Description of the display indicators..............................6
Luminous indicators.....................................................6
Keyboard’s description....................................................6
Keys................................................................................6
Error messages.................................................................6
DW-PT Indicador user’s menu.........................................7
Operating Mode.............................................................7
Description.....................................................................8
Piece counter....................................................................... 8
Preset Tares......................................................................... 8
Date..................................................................................... 8
Time. ................................................................................... 8
Totalize, printing and set to zero of the results.........8
WIRING.............................................................................10
Connection through gland seal (DW-PT/X and DW-
PT/B).............................................................................10
Location of external connectors (DW-PT and DW-
PT/P).............................................................................11
Wiring between DW-### and PC. (Serial
Communication)..........................................................11
RS232................................................................................ 11
RS485................................................................................ 11
MOUNTING. .....................................................................11
INDEX...............................................................................12

Página: 2 / 12 DW-PT
Packing content.
Instructions manual for the user and technical service.
DW-PT weight indicator.
External power supply 220Vac / 12Vdc 0.5A.
Note: Verify the content of the package.
Technical features.
General.
These high resolution indicators of weight have a special circuitry that allows them to be upgraded and checked.
For this reason they are extremely accurate, sensitive and stable in temperature.
Non volatile (E2PROM) memory to preserve the system calibration parameters.
Watchdog circuit for an automatic recovery in the event of error.
Standard ticket programmable by PC.
All the configuration and calibration can be carried out through the front panel and/or the serial channel.
Sealed electronic and mechanical.
Firmware upgrade through the serial channel.
Features DW-PT
Internal resolution of the A/D converter 24 Bits
RS232 1 channel + 1 optional
RS422 / RS485 1 Channel
Comumnication USB, Ethernet, WIFI Opctonal
Keyboard 5 Keys
7 segments display of weight 
Equipment box with gland seal Optional
IP65 Watertightness Optional
Power supply 220Vac or 12Vdc
Dimensions W: 192 - H: 180 - L: 50
Metrology. Description Symbol Value Unit
Precision Class - III -
Maximum number of verification steps nind 6000 -
Minimum input tension for verification step Umin 1 V
Zero stability 150 nV/ºC Max
Gain stability 3.5 ppm/ºC Max
Excitement tension of the load cell Uexc 5 VDC
Minimum resistance of the load cell RLmin 43 
Maximum resistance of the load cell RLmax 500 
Low limit of the temperature field Tmin -10 ºC
High limit of the temperature field Tmax 40 ºC
Low limit of the storage temperature -25 ºC
High limit of the storage temperature 65 ºC
Relative humidity not condensed: < 95 % a 40 ºC
Fraction of the maximum allowed error ind 0.5 -
Minimum input tension -19 mV
Maximum input tension +19 mV
Internal resolution of AD converter 24
16.777.215 Bits Points
Samples per second 15...960
Minimum scales capacity to display 1 kg
Maximum scales capacity to display 300000 kg
In accordance with the norm: OIML R76
In accordance with the norm: UNE-EN-45501

Página: 3 / 12 DW-PT
Installation and Security.
Installation.
Warnings.
The installation and use of this equipment will be made by qualified personnel.
When this equipment is used to control machines or processes where the
personnel or the process can be damaged, they will incorporate to the
installation all the security necessary elements to avoid damages to the
operator and/or the system.
See the chapter Connecting and the chapter of Configuration of Peripherals to check the correct position of
each one of the selection jumpers.
Security prescriptions.
This equipment has been designed and verified in accordance with the norm UNITES 20553 and
has been delivered under correct use conditions.
The manual contains the appropriate information for the electric installation. DO NOT make
changes in the connections while the equipment is connected to the supply tension. All the
connections should be made before the connection of the equipment to the supply tension.
Disconnect the equipment of the supply tension before making any reconnection or modification.
The equipment should be installed in places with an appropriate ventilation, not forced, to avoid an excessive
heating and far enough from equipment that can generate electric noise or magnetic fields, such as power relays,
electric motors, frequency converters, etc.
DO NOT install the equipment outdoors, do it always inside a metallic panel with the appropriate protection. DO
NOT put the equipment in service until the end of the installation.
Power supply tension.
Connect the supply tension to the proper terminals (See the connecting instructions).
Verify that the supply tension and frequency of the power supply to which the equipment should be connected
correspond to the label located in the rear part.
DO NOT connect the equipment to supply networks that are overloaded or to circuits that feed charges working in
circuits ON-OFF or to circuits that feed charges of inductive type as reels, electro-valves, etc.
Wiring of the signals.
Some considerations should be kept in mind in the moment to install the cables for the sensor signals. As they can
act as reception antennas of electric noise and electric parasites, the more close they are of sources of noise or
magnetic fields, the more sensitive will be able to capture them.
There are some well-known norms for the installers that should be followed when making the wiring.
a.- DO NOT install the signal cables in the same conduits or parallelly to cables that support power, control of DC
or AC motors, electro-valves, electromagnets, etc.
b.- The installation of the cables coming from the sensors or the control signals should be made in places as far
away as possible of contactors, transformers, control relays, etc.
Security.
!
!

Página: 4 / 12 DW-PT
Prescriptions.
Before beginning any adjustment operation, substitution, maintenance or repair,
disconnect the equipment of the supply tension.
To ensure a correct operation keep the equipment under good conditions of
cleaning. For the cleaning use a humid and clean cloth. DO NOT use abrasive
products for the plastic front as solvent, alcohols, etc., because they would
harm its transparency and make more difficult the reading of the display.
In prevention of electric risk or fire, DO NOT expose the equipment to an atmosphere of excessive humidity.
DO NOT work with the equipment in presence of flammable gases or smokes as it can be a serious risk to the
security. The equipment has been designed to be mounted in a metallic panel.
The equipment will be retired of service when:
Shows evident signs of damages.
The measurement that carries out are anomalous or out of range.
It is estimated that it has been stored under bad conditions.
A protection failure can take place.
In case of fire.
1.- Disconnect the equipment from the power supply.
2.- Raise the alarm according with the local norms.
3.- Disconnect all the air conditioning equipments.
4.- Attack the fire with carbonic snow, never with water.
WARNING: DO NOT use liquid vaporized systems in closed areas.
Connections.
The connections of the signals will be made by means of connectors of plugging screws and the supply tension by
pins to facilitate their connection and installation. Each terminal admits a cable of up to 2.5mm2, nevertheless it is
recommended to use cable of 1mm2. The connectors for the supply tension and the signal entrances are
independent.
!
!

Página: 5 / 12 DW-PT
Operating modes of the indicator.
• The operating of this indicator is divided in 3 basic ways:
1. Configuration of the parameters of the indicator. [PRG]
2. Configuration of the parameters of the process to control (Piece counter and Programmed Tares). [PRG]
3. Display of Weight – Pieces - Totalizer.
• In the programming modes (configuration of the required parameters [PRG]), the way to deal with the introduction of the
data is based on the displacement by a hierarchic structure of menus.
• In this type of structure of menus the key [] should be used to move for the different options.
• To access to a submenu or introduction of data option the key [] is used.
• To access an upper menu level or cancel the introduction of data the key [] is used.
• To enter the value requested in any option can be carried out in the following ways:
1.- Numerically:
1.a.- With the cursor [] we can move through the digits.
1.b.- With the cursor [] or [] we can increment the digit’s value. [ 0, 1, 2, ..., 8, 9, 0, 1, ... etc.]
2.- Alphanumerically.
2.a.- With the cursor [] we can move through the digits.
2.b.- With the cursor [] or [] we can change the character of the digit (alphabet, numbers and special
characters).
3.- Choice among several options:
3.a.- With the cursor [] we can move through all the available options.
• All the data to enter have an admitted range of values. This implies that it is not allowed to introduce a value outside of
that range.
Display modes
• The key [ /], together with the indicative LEDs [Pieces] and [Totalizer], allows to change the visualization of
the display. Sequentially commutes among presentation of weight, display of the number of pieces (Piece-counter
mode) and total of weight, showing the total of accumulated weight and the total of pieces in the place where is
displayed the total of accumulated pieces
• In the following table the relationship between visualization modes and state of indicative LEDs is summarized.
Mode 6 digits display Indicator
[Pieces] Indicator
[Totalizer]
Weight Shows the value of the net weight in function of the zero and
tare selected. OFF OFF
Piece-counter Shows the amount of pieces to which the acquired weight
corresponds. ON OFF
Weight totalizer In the display the total of the accumulated weight and the
number of operations is shown. OFF ON
Pieces totalizer In the display the total of the accumulated pieces and the
number of operations is shown. ON ON

Página: 6 / 12 DW-PT
Description of the display indicators.
Luminous indicators
POWER SUPPLY / LOW
BATTERY
If the luminous indicator is fixed it indicates that the equipment is ON.
If blinking indicates low battery level.
Prog
PROGRAMMING The equipment is in some programming option.
Error
ERROR / OUTPUT ALARM The equipment has detected an error during its operation.
STABLE WEIGHT It indicates that the weight on the scale is stable, without oscillations.
WEIGHT IN ZERO ZONE It lights when the scale is in zero zone.
NET
NET / GROSS When lights indicates that the current value of weight is the NET. It will fade
when the GROSS weight arrives to ZERO and there is not a FIXED TARE.
TARE It lights when the equipment has a FIXED TARE that can be deleted pressing
the TARE key.
PT
PRESET TARE It indicates that the equipment has already a FIXED TARE that can only be
eliminated pressing the key TARE again.
PIECES Piece-counter display mode.
TOTALIZER Totalizer display mode (weight or pieces).
Keyboard’s description.
Keys
ESCAPE: This key is used to navigate trough the menus when programming.
/
PIECES / TOTALIZER: If [Prog] is disabled changes sequentially among weight, pieces, weight totalizer and
number of pieces totalizer.
UP: This key is used to navigate trough the menus when programming.
ZERO: If [Prog] is disabled forces a new ZERO of the indicator, and later will light.
In the totalizer mode allows to set to zero the accumulated value of weight (in case that the totalizer of weight is
activated) or the accumulated value of pieces (in case that the totalizer of pieces is activated).
DOWN: This key is used to navigate trough the menus when programming.
PRINT: If [Prog] is disabled totalizes the operation or the number of pieces and prints a ticket.
RIGHT: This key is used to navigate trough the menus when programming.
TARE: If [Prog] is disabled, activates the indicator’s TARE function. The first time activates
NET
, the second
time activates , and a third pressing disables TARE.
ENTER: This key is used to navigate trough the menus when programming.
MENU
MENU: If [Prog] is disabled, the MENU key allows to access to all the parameters of the indicator.
Error messages.
General:
Err 66 Input value too small.
Err 67 Input value too high.
err 10 Serial channel testing error.
ERR 11 Serial channel testing error.
ERR 30 There are no totals to print.
ERR 31 It’s not possible to store the operation to reprint tickets.
ERR 32 Print timeout in certain protocols.
Weight:
Error description Possible causes.
Err 12 Over 2 Overflow. Scale’s capacity
exceeded. Scale’s capacity or load cell bad dimensioned.
Err 13 Over 1 AD converter overflow. Check the connection of the load cell or load cell bad
dimensioned.
ERR 14 Unde 1 AD converter underflow. Check the connection of the load cell or load cell bad
dimensioned.

Página: 7 / 12 DW-PT
DW-PT Indicador user’s menu.
Operating Mode.
• This equipment works as a weighing indicator, tares control, piece-counter and totalizer. Here you are the menu to
work with preset tares and as piece counter.
Pieces
Counter
Programmed
Tares
Pressing
MENU
DW-P
T
USER MENU
Select
Select
Program
Program
Print
Print
Tare 1
Piece 1
Tare 1
Piece 1
Description
Obtain
new value
Modify new
tare value
Show net
weight
Description
Introduce
the numbre
ofpieces
Tare 2
Piece 2
Tare 2
Piece 2
Tare 20
Pieza 20
Tare 20
Piece 20
…
…
…
…
Prints a tare
valuesreport.
Imprime un listado con
el valor de todas las
piezasprogramadas.
Ídem
Tare 1. Ídem Tare 1. Ídem Tare 1.
Ídem
Piece 1
Ídem
Piece 1
Ídem
Piece 1
Date
op ional.t
Manual tare
Manual Piece
counter
Time
op ional.t
Setupsdate
Introduce a
manual
tare value
Introduce a
manual piece
counter value SetupsTime

Página: 8 / 12 DW-PT
Description.
• When pressing
MENU
from the working screen, the equipment will show us in screen the first parameter (Piece
counter).
• These options allow us to work like piece counter and with fixed tares.
1. Piece counter: When pressing [] allows to operate with the section of piece counter, select, modify and print.
2. Preset Tares: When pressing [] allows to operate with the section of preset tares, select, modify and print.
3. Date: If the clock option is not available this option will not be shown. If available, when pressing [] you will
access to a submenu in which the following parameters can be programmed:
a. Day: Month’s day, between 1 and 31.
b. Month: Year’s month, between 1 and 12.
c. Year: Year, between 00 and 99.
Note: Fulfills Y2K specifications.
4. Time: If the clock option is not available this option will not be shown. If available, when pressing [] you will
access to a submenu in which the following parameters can be programmed:
a. Hour: Hour between 00 and 23.
b. Minutes: Minutes, between 00 and 59.
c. Seconds: Seconds, between 00 and 59.
Totalize, printing and set to zero of the results.
Key to press
Variables. Display Print Set to zero Illuminated
indicators
Weight / -
Pieces / 
Weight totalizer / 0
Piece totalizer / 0y 
To change between the functions of Weight and Piece-counter it is necessary to press the key [ /].
When pressing the key [] for the first time the header of the ticket and the first operation line will be printed.
To print the accumulated total of weight it is necessary to press the key [ /] until the indicator lights and next
press the key [].
To print the total of pieces, together with the number of operations made to obtain it, it is necessary to press the
print key when the visualization mode of total of pieces is selected.
If the indicator is turned OFF it keeps the last operation done as well as the total values.
For the setting to zero of the totalizer of weight or pieces, press the key [0] when the screen of the
corresponding totalizer is displaying.
Here you are an example of ticket. (see Report 1)

Página: 9 / 12 DW-PT
DATA-CONTROL PC
Line 2
Line 3
Tuesday 5 June, 2001 18:41:58
Ticket nr.: 2
Operation Tare Net Weight
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 +100.0 kg +325.0 kg
2 +100.0 kg +324.5 kg
3 +100.0 kg +326.5 kg
4 +100.0 kg +325.0 kg
5 +100.0 kg +325.5 kg
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Total operations Accumulated weight
5 +1626.5 kg
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Footpage Report 1

Página: 10 / 12 DW-PT
WIRING
Connection through gland seal (DW-PT/X and DW-PT/B)
As seen from the inner part of the equipment.
J5
COM1-RS232
2- TxD
3- RxD
5- GND
9- A
1-B 4- TxD 6- RxD
5- GND
COM1-RS485 COM2-RS232
Communication ports
Communication ports
Power supply
+12Vdc
1
69
5
+SENSE
+V
+IN
-SENSE
-V
-IN
Malla
15
96
Load cell inpu
t
J5
COM1-RS232
6- TxD
4- RxD
3- GND
1-A
7- B 2- TxD 5- RxD
3- GND
COM1-RS485 COM2-RS232
Power supply
+12Vdc
+SENSE
+V
+IN
-SENSE
-V
-IN
Malla
Load cell input
1 1

Página: 11 / 12 DW-PT
Location of external connectors (DW-PT and DW-PT/P)
As seen from the rear part of the indicator.
Wiring of the most complete version of the indicator. In case the version of the acquired equipment doesn't have all
the available options it will be supplied with all the necessary connectors.
Communication Ports
15
96
COM1-RS232
2-TxD
3-RxD
5-GND
9-A
1-B 4-TxD 6-RxD
5-GND
COM1-RS485 COM2-RS232
Power Supply
+12Vdc
1
69
5
Load Cell Input
+SENSE
+V
+IN
-SENSE
-V
-IN
Malla
Wiring between DW-### and PC. (Serial Communication)
RS232 COM1
DW-###
Delta 9
Connector
COM2
DW-###
Delta 9
Connector
PC
Delta 9
Connector
PC
Delta 25
Connector
2 – TxD 4 – TxD —— 2 – RxD 3 – RxD
3 – RxD 6 – RxD ————— 3 – TxD 2 – TxD
5 – GND 5 – GND ——————— 5 – GND 7 – GND
RS485 COM1
DW-###
SubD 9 Connector
PC
through converter
RS232 / RS422
9 – A ————1 – Tx+ (TxA)
4 – Rx+ (RxA)
1 – B ————2 – Tx – (TxB)
3 – Rx- (RxB)
MOUNTING.
To mount the panel indicator DW-PT/P, make a cut-out of the
indicated dimensions in the next diagram.
Insert the indicator into the panel from the front side.
Put the clips on both sides of the case and screw strongly from the
back side of the panel.
To take the instrument out of the panel unscrew the clips and slide
them back over the case.
113mm
181mm
DW-PT/P

Página: 12 / 12 DW-PT
INDEX
D
DW-PT
Piece counter....................................................................... 8
Preset Tares......................................................................... 8
Print..................................................................................... 8
Totalizer of operations........................................................ 8
Totalizer of pieces............................................................... 8
S
Setup Peripherals
Date..................................................................................... 8
Time.................................................................................... 8
Updates log: