DIGIWEIGH DWP-98D User Manual

DWP-98D Dual scale

User’s Guide

PLEASE READ THIS MANUAL VERY CAREFULLY BEFORE
ATTEMPT TO OPERATE THE INSTRUMENT

Specifications subject to change without prior notice

CONTENTS

1. INSTALLATION

2. SPECIFICATIONS

3. KEYS, DISPLAY AND CONNECTIONS

4. GETTING STARTED

5. INITIAL SETUP

6. INSTRUCTION FOR USE

7. RS232 DATA OUTPUT

8. BATTERY POWER AND RECHARGING

9. ERROR CODES

10. DAILY CARE AND MAINTENANCE

1. INSTALLATION

Because of metrological legislation, installation/some
metrological parameter settings are limited to be done by
authorized personnel only. Do not attempt to change any of the
built-in metrological parameters. Contact your dealer for more
information and technical assistance.

CAUTION:

The instrument is legal for trade only when it is sealed (and/or
stamped) and bearing a serial number. Do not attempt to break
the seal (or stamp) affixed to the instrument or remove the
serial number. Contact your dealer for more information and
after sales service.

To ensure performance accuracy, do not use the instrument in
where or when the environment condition falls beyond as those
listed on SPECIFICATIONS.

Do not attempt to open the instrument, no user serviceable
parts inside.

2. SPECIFICATIONS

Stabilization

time

2 second typical

Operating

temperature

0°C - 40°C / 32°F - 104°F

Power supply

220~240V AC (110V optional) 50/60Hz

built-in rechargeable battery 6V4AH.

Display

3 windows 6 digits 0.8’LCD display.

and 11 status indication

Zero range

0mV~8mV

Housing

ABS housing and Stainless steel pan(230*290mm)

ADC

Σ-Δ

External

Resolution

1/60000

PLU

100

Interface

RS-232 Output(second RS232 and RS485 optional)

Model#

DWP-98CCHD

DWP-98CBHD

Max

Capacity

6kg

15kg

Readability

0.1g

0.2g

2.1 GENERAL SPECIFICATIONS

DWP-98D Series(resolution 1:60000; unit :kg,lb,g)

Common Specification

3. KEYS, DISPLAY AND CONNECTIONS

ON/

OFF

#SETCHECKUNIT

ZEROTARECE0.

RECALLPLU987

M+MR654

@WTSAMPLE321

ON/

OFF

#SETCHECKUNIT

ZEROTARECE0.

RECALLPLU987

M+MR654

@WTSAMPLE321

①/②

1.ON/OFF

Power on /off the indicator

2. UNIT PIECE WEIGHT SET KEY (@WT)
Press this key to confirm the unit piece weight entered by numeric keys.

3. WEIGHT UNIT KEY

Press this key to shift among various weight units.

4. M+ KEY

Press this key to accumulate the current quantity to memory
Press this key to print out the result
Press this key as next parameter when setting

5. MR KEY

Press this key to read the accumulate result

6. TARE KEY

Press this key to tare off the weight of a container.
Press this key to enter parameter setting when count down

or confirm and save parameter when setting;

Press this key to confirm the preset-tare by numeric keys

7 SAMPLE QUANTITY SET KEY

Press this key to confirm the sample size (pieces) entered by numeric keys.

8. CHECK KEY

Press this key to set upper & lower quantity check limit and to trigger the
quantity check mode.

9. ZERO KEY

Press this key to set weight displayed to zero when an empty scale has
drifted away from a true zero reading.

10. CE KEY
Press this key to clear value entered.

11. NUMERIC KEYS

Numeric keys 0 ~ 9 and decimal key.

12. ①/② KEY

To convert the two channels for main and extend platform

13. #SET KEY
Press [SET] to get quick setting parameter

14.PLU KEY

Press this key to store the unit weight (100 unit weight can be stored by
press 0-9 numeric keys.)

15.RECALL KEY

Press this key to recall the unit weight as stored before

16. BATTERY POWER / LEVEL INDICATOR

This indicator appears to show:-

 The instrument is running on the built-in rechargeable battery,
 It shows the remaining battery level.

17. ZERO INDICATOR

Visible when instrument at true zero weight status.

18 .NET INDICATOR
Visible when tare function is in effect. The weight being shown on Weight
Panel is net weight.

19. STABLE INDICATOR

Visible when weight reading is stable.

20. WEIGHT UNIT INDICATOR

kg = kilogram, g = gram, lb = pound

21. ARROW INDICATION

Acc=appear when with accumulate result in store
PT =appear after preset tare
P1 =appear when main platform used as current
P2 =appear when extend platform used as current

22. UNIT PIECE WEIGHT INDICATOR /pcs

The value left to it is the unit piece weight. This indicator remains visible
during normal operation status.

23. INSUFFICIENT SAMPLE WEIGHT CARNING INDICATOR

Visible when total weight of the sample size is below satisfactory level. If
possible, increase the sample quantity unit this indicator disappears.

24. INSUFFICIENT UNIT PIECE WEIGHT CARNING INDICATOR

Visible when the unit piece weight of the sample is below satisfactory level.
If possible, increase the sample quantity.

25. QUANTITY INDICATOR (pcs)

The value left to it is the quantity of the current transaction. This indicator
remains visible during normal operation status.

26. QUANTITY CHECK RESULT INDICATORS

 HI = Quantity is higher than the HI limit set.
 OK = Quantity is in between than the low and HI limits set.
 LO = Quantity is lower than the LO limit set.

A. WEIGHT PANEL

Weight value is shown here.

B. UNIT PIECE WEIGHT PANEL

Unit piece weight is shown here.

C. QUANTITY PANEL

Quantity value is shown here.

D. BUBBLE LEVEL

Refer to this bubble to obtain a horizontal position for the instrument.

E. DC JACK INPUT

External power adaptor is plugged in here right below the scale

F. RS232 COMPORT

9 pin (DB9) RS232 interface output for connection with computer and other
peripherals.

Pin2=RX Pin3=TX Pin5=GND

LOAD CELL

CONNECTOR PIN #

ASSIGNMENT

1

EXCITATION +ve

2

EXCITATION -ve

3

Shield

4

SIGNAL -ve

5

SIGNAL +ve

G. SECONDLY PLATFORM CONNECTION

9 Pin RS232 Connector
1 EXCITATION –

6 EXCITATION +
8 SIGNAL –
9 SIGNAL +

4. GETTING STARTED

In order to obtain accurate weighing and counting result, the instrument
must be placed on a strong and level surface horizontally.

Avoid using the instrument in environment where excessive wind flow,
vibration and extreme temperature change exist.

The instrument should be installed from any sources of excessive electrical
noise. For full EMC or for RFI immunity, termination of cable shields and
correct grounding of the instrument is essential.

General warning: -

 The instrument is not an explosion proof device.
 The instrument is not a water proof device.
 Do not open the instrument, no user serviceable parts inside.

Always contact your dealer for service.

 The instrument not to be subject to shock, excessive vibration

or extremes of temperature (before or after installation).

4.1 BUILT-IN RECHARGEABLE BATTERY

The instrument is equipped with a built-in rechargeable battery. Before first
time use, recharge it for at least 8 hours to ensure the best battery
performance.

4.2 POWER ADAPTOR

Before plugging in the power adaptor, check and make sure the input
voltage of the adaptor matches with output voltage of the electricity outlet. If
not, contact your dealer immediately.

4.3 CONNECTING OTHER DEVICES

Always turn the instrument off before making any connections or
disconnections with external devices.

4.3.1. Connecting with a Computer or Mini printer

4.3.2. Connecting secondly platform

5. INITIAL SETUP

5.1 INTERNAL SETTINGS

Preferred application parameters can be checked or set through internal
functions. Refer to 5.4 for internal function description and setting
procedures.

5.2 HOW TO ENTER AND SELECT INTERNAL FUNCTION

Follow the below steps to enter and select desired parameter of an internal
function.

a. Turn the instrument off and on again
b. Press [TARE] during countdown,
c. The instrument displays RS232
d. Hit [RECALL] to go to CAL then hit [TARE]
e. Enter password when P---- appears “0000”
f. ”The instrument is now in internal function,

5.3 KEY FUNCTION DURING INTERNAL FUNCTION SETTING

 [TARE] = Enter, save and return,
 [M+] = Quit without saving,
 [CHECK] = Go next,
 [RECALL] = Go previous,
 [CE] = Clear,

6. INSTRUCTION FOR USE

6.1 POWER ON /OFF

Press on/off key for 2 seconds on panel, instrument is on and displays: -

a. software and revision number and capacity of instrument,
b. countdown process starts
c. all LCD segments,

After that, the instrument is ready for operation.

d. the Arrow P1 or P2 will show which is the current platform
Press on/off key for 2 seconds when the scale is on and in weighing status
to switch off the scale

6.2 START WEIGHING

a. If zero weight cannot be obtained when unloaded, press [ZERO].

After [ZERO] is pressed, Zero Indicator appears.
Refer to SPECIFICATIONS for maximum zero range,

b. Always place an object onto platter gently. Excessive force applied to

platter may cause damages to the weight sensor inside instrument,
c. Weight of the object is displayed on thus unit automatically,
d. It is a good practice to remove all loads from platter after weighing. It

will prolong the life of the weight sensor inside instrument.

6.3 ABOUT WEIGHT UNIT CONVERSION

The instrument supports conversion among weight units. Press [UNIT] to

shift between kg, g and lb.

To enable or disable a particular weight unit, set it ON or OFF respectively

in internal Unit.

The weight unit being employed before power off will be employed when
turned on again.

Note: Select the suitable unit before counting function. Can not change unit
during counting function.

6.4 TARE OFF THE WEIGHT OF A CONTAINER1

1

Tare function is used to temporarily set the instrument to zero (such as
cancelling the weight of a box or a container) in order to get the net weight
result

6.4.1 Enable / Disable Repeat (Multiple) Tare

Depends on internal function setting, repeated (multiple) tare operation may
be enable (Mode 2) or disabled (Mode 1). Contact your dealer for more
information.

When repeat (multiple) tare is enabled: -

1. the instrument will permit multiple tare operations provided that

both of the below requirements are fulfilled: -
 The tare operation does not permit a reduction of the value of

the tare;

 The tare effect can only be cancelled when there is no load on

the platter.

2. tare effect can only be cancelled when container is removed and
gross weight is zero.

6.4.2 Manual Tare

When a container is used, follow the below steps to tare the weight of the
container off to get a net weight result.

a. Remove all loads from platter,
b. Make sure that the Zero Indicator is on. If not, press [ZERO] to set

weight reading to zero,
c. Place container on platter,
d. Press [TARE],
e. Net Indicator appears to indicate tare is in effect and weight reading

is net weight.
f. To cancel tare effect, remove all loads and container from platter and

press [TARE] ,

The tare weight is deducted from the weighing capacity (Max), reducing the

maximum weight that can be displayed.

g. Net Indicator disappears. Tare effect has been removed and weight

2

reading is gross weight.

6.4.3 Preset Tare

This feature enables the user to manually enter the tare weight. During
normal operation, enter the pre-determined tare weight through numeric
keys then press [TARE]. This pre-determined tare value will be deducted.
Arrow for pre-set tare will be shown.

To cancel the preset tare effect, remove all loads from platter then press

[TARE]. Press [ZERO] ,then Arrow for pre-set tare will be disappear

NOTE: -Manual tare is enable when preset tare is in effect. Manual tare will

cancel the effect of preset tare.

6.5 QUANTITY COUNTING

Quantity counting starts with determining the unit piece weight either by
keyboard entry or sampling process.

6.5.1 Entering Unit Piece Weight 2

This method is used where unit piece weight is known and is highly
standardized.

a. Refer to 6.2 to 6.4 for zero, selecting preferred weight unit and tare

operation,
b. Enter the unit piece weight and press [@WT]. The unit piece weight

is now displayed on the Unit Piece Weight Panel.
c. Place a load on the platter. The weight of the load is displayed on the

Weight Panel and the quantity is displayed on the Quantity Panel.
d. To enter new unit piece weight, repeat step b above.

6.5.2 Sampling Process
This method is used where unit piece weight is unknown or the weight of
individual piece is not highly standardized.

When the individual unit piece weight is not standardized, it is strongly

recommended that counting procedures as described in 6.5.2 should be employed.

a. Refer to 6.2 and 6.4 for zero, selecting preferred weight unit and tare

3

operation,
b. Place a sample size with known quantity on platter
c. Enter the quantity of the sample through the numeric keypad and

confirm by pressing [SAMPLE].
d. The instrument will automatically determine the unit piece weight and

display it on the Unit Piece Weight Panel3.
e. Step by step add more load onto the platter (or remove part of the

load from the platter),
f. The latest Weight, unit piece weight and total quantity would be

displayed on the corresponding panels,
g. To start a new sampling, repeated step a to d above.

6.5.2 Sampling process between main and extend platform

With a remote weighing base or platform that can be any size .Can switch
between the two scales: Counting sample on light capacity unit and switch
to heavier capacity base when larger quantities are required.

This method is used where unit piece weight is unknown or the weight of
individual piece is not highly standardized.

a. Refer to 6.2 and 6.4 for zero, selecting preferred weight unit and tare

operation on the light capacity platform(make sure the arrow point to

current platform)
b. Place a sample size with known quantity on platter
c. Enter the quantity of the sample through the numeric keypad and

confirm by pressing [SAMPLE].
d. The instrument will automatically determine the unit piece weight and

display it on the Unit Piece Weight Panel
e. Press the [ ①/② ] to switch arrow to larger platform; Now this

platform will be the current platform for quantity counting
f. Step by step add load onto the larger platform
g. The latest Weight, unit piece weight and total quantity would be

At this point, sampling process is completed and Auto Piece Weight

Enhancement Function comes into effect.

displayed on the corresponding panels,

To start a new sampling, repeated step a to f above

6.7 MEMORY ACCUMULATION FUNCTION

6.7.1 To Accumulate a Transaction to Memory

a. When quantity is being displayed on Quantity Panel, press [M+] to

and accumulate data of current transaction to memory,

b. The instrument: -

 displays “ACC n” on Quantity Panel. ACC denotes data has

been accumulated to memory. Arrow point to ACC is shown.

n donates the number of transactions which have been

accumulated to memory.

 displays total accumulated value (total weight and total quantity)

on Total weight panel and Unit Weight Panel.

 output transaction printout(s) through the RS232 comport. The

instrument returns to normal operation status after 2 seconds if
the RS232 setting is manual and ACC is on

c. Repeat a for subsequent transactions

6.7.2 Memory Recall and Clearance
a. Remove all loads from platter,
b. Press [MR] to recall total accumulated weight from memory,
c. The instrument displays: -

Display “ACC n” on Quantity Panel. ACC denotes data has been
accumulated to memory. Arrow point to ACC is shown; n donates the
number of transactions which have been accumulated to memory.
Displays total accumulated value (total weight and total quantity) on

Total weight panel and Unit Weight Panel.

e. Press [M+] to print out the accumulate result if the RS232 setting is

manual and format=2

d. At this point: -

 Press [ZERO] to quit or,
 Press [CE] to clear memory, then [ZERO] to return to normal

operation status.

6.8 QUANTITY CHECK FUNCTION4

4

6.8.1 To Enter High and Lo Quantity Limits

The instrument is equipped with quantity check function. Follow the below
steps to trigger checkweighing mode: -

a. During normal operation, press [CHECK].
b. The instrument displays High Limit and current HI limit value is

displayed on Quantity Panel.

c. Press [TARE] to accept or enter a new HI limit through the numeric

keys and then press [TARE] to confirm,

d. The instrument then displays Lo Limit and current LO limit value is

displayed on Quantity Panel.

e. Press [TARE] to accept or enter a new LO limit through the numeric

keys and then press [TARE] to confirm,

Hints: -

1. For normal comparison, set both HI and LO limits,

2. To check only if result is lower or equal to LO (result ≤ LO), set HI
limit = 0,

3. To check only if result is higher or equal to HI (result ≥ HI), set LO
limit = 0,

4. To check if result is equal to a specified value, set both HI limit and
LO limit = the specified value

6.8.2 Visual and Audio Quantity Check Signals

6.8.2.1 Visual signal: - Quantity check result is displayed by one of the
Check Result Indicators located on Quantity Panel.

6.8.2.2. Audio signal: - depends on setting of internal function F5, audio

signal can be triggered when result is = within range, out of
range or turned off.

6.8.3 To Quit Checkweighing Mode

To quit checkweighing mode, set both HI and LO limits to zero.

Quantity check function will not function when weight reading is less than 20d.

6.9. Quick setting

Press [SET] to get quick setting parameter ,Press [TARE] to enter and
[M+] and [RECALL] to shift :
PARA, including time, date, back light, auto power off , key beep, unit ,
CHECK , setting checking beep mode, same as mentioned in 5.4
RS232, setting RS232 parameter , same as mentioned in 5.4
RECHARGE setting : To check the currency when charging(mA)
Count : 1) calibration count value; 2)parameter set count value,
Quit setting by press [ZERO]
Quit Count info need by press [ZERO] for 5 seconds

7. RS232 DATA OUTPUT

DATA BIT

DESCRIPTION

1~2

MOTION STATUS

US = UNSTABLE
ST = STABLE

3

COMMA SEPARATION

4~5

NET/GROSS

NT = NET WEIGHT
GS = GROSS WEIGHT

6

SIGN (Sign of weight reading)
Positive = space. Negative = minus (-)

7~13

WEIGHT VALUE

7-character string containing the current weight including
location of decimal point.

If there is no decimal point, then the first character is a

5

Data output parameters are fixed as below: -

 Data Bit = 8
 Parity = None
 Stop Bit = 1

There are 2 data output modes (PC and Prt) are available5. PC is for
communication with computer and other peripherals which accepts and
processes continuous data communication. Prt (printer) is for transmission
to printer or other peripherals which accept only single or manual data
transmission.

Baud rate has to be set before proceeding to other settings.

7.1 PC (COMPUTER) MODE

Weight status and data are sent under the PC (Computer) Mode). Data is
transmitted in ASCII code. Data format is listed on below table.

Refer to 5. INITIAL SETUP for setting information

space.

14

COMMA SEPARATION

15~16

UNIT
kg = kilogram
g_= gram (_ = blank space)
lb = pound

17

Cr

18

LF

7.2 PRT (PRINTER) MODE

7.2.1 Printing Current Transaction

A standard printout as will be sent through the RS232 Comport when [M+]is
pressed. Refer to Standard Printout Sample on next page for description.

Number of copies sent = the number of copy set in internal function Refer to

5 INITIAL SETUP for more information. If extra copies are needed, press
[M+] again.

7.2.2 Printing the Totalized Accumulated Result

Follow the below steps for to print the totalized accumulated result: -

a. Remove all loads from platter,
b. If zero weight reading cannot be obtained when unloaded, press

[ZERO]

c. Press [MR] then followed by [M+], The below data and format will

be sent,

Refer to Totalized Accumulated Printout Sample on next page for
description.

Format=1

TIME 12:08:57
DATE 07.08.2010
No. 0
NET 4.000kg
UNIT WT. 0.5 g
Q'ty PCS

HIGH 5000PCS
LOW 4500PCS
HIGHER THAN LIMIT

TIME 13:48:23
DATE 07.08.2010
No. 4
TOTAL 14997PCS

DATE TIME No. COUNT TARE NET TOTAL UNIT.W
01-01-2001 00:00:10 7 A 10 P 0.0000kg 0.2001kg 10P 20.0052 g
01-01-2001 00:00:20 8 B 56 P 0.00kg 1.12kg 66P 20.0052 g

A and B stand for the data is from which platform

Format-=2
Standard Printout Sample Description

1. Time of printing,

2. Date of printing,

3. M+ sequent number

4. Net weight,

5. Unit piece weight,

6. Quantity,

7. One blank line,

8. One blank line,

9. HI limit set**

10. LO limit set**

11. Quantity Check result

Totalized Accumulated

Printout Sample Description

1. Time of printing,

2. Date of printing,

3. Total No. of transaction

4. Total accumulated quantity

8. BATTERY POWER AND RECHARGING

Remaining battery power of the built-in rechargeable battery is displayed on
the BATTERY POWER / LEVEL INDICATOR.

8.1 SYMBOLS AND REMAINING POWER: -

Full Battery: ≥ 6.3V;
2 Blocks: ≥6.0V;
1 Block: ≥5.7V
Frame only: ＜5.7V

8.2 BATTERY OPERATION TIME

Depends on the battery condition, a fully charge new rechargeable battery
will usually give (when connect to one 350 ohm load cell): -

 Around 70 hours of continuous operation with backlight is highest
 Around 200 hours of continuous operation without backlight.

8.3 RECHARGE BATTERY

When appears, (when battery is less than 5.7V), it means the
built-in rechargeable battery is at low voltage status. It is recommended to
recharge as soon as possible.

To protect the built-in rechargeable battery, this instrument will power off
automatically when battery voltage is at extremely low level (when battery is
at around 5.4V). If this is the case, do not attempt to power this instrument
on. Recharge this instrument immediately. Fail in doing so may cause
unrecoverable damage to the built-in rechargeable battery.

Battery charging status is shown on LCD CHARGE STATUS INDICATOR:

When charge , the status is shift of 1 block,2 block ,3 block and only frame
Battery recharge is possible while operating. Overcharge protection circuit
is built inside to prevent battery damages caused by overcharge.

Heat will be generated during recharging and it is normal to feel minor heat
at front housing of this instrument.

9. ERROR CODES

Error

Code No.

Description

Err 1

Time value error

Err 2

Date value error

Err 3

Logic error. LO limit is higher than HI limit
(and HI is not = 0)

Err 4

Not sense the loadcell signal

Err 5

Exceed maximum power on zero range

Err 6

Exceed maximum manual zero range

Err 7

Tare operation error

Err 8

Offset out of range / unstable during power on

--oL--

Overload (Gross weight is more than Max plus 9d)

10. DAILY CARE AND MAINTENANCE

 Clean the instrument with a soft, damp cloth. If necessary, use a mild

detergent in water,

 Do not use any harsh, abrasive material, acetone, volatile solvent,

thinner or alcohol for cleaning,

 Verify the accuracy of this unit periodically. Re-calibrate this unit if

necessary. In some countries, calibration requires authorized /
qualified agent. Contact your dealer for more information,

 Store this unit in a dry and clean place,
 Recharge battery before and every 2 months during long time

storage.