Omega DPS20-Series Owner's manual

Brand: Omega

Model: DPS20-Series

Type: Owner's manual

e-mail: [email protected]

For latest product manuals:

www.omegamanual.info

DPS20 Series

Panel Meter for

Load cell signals

6-Digit,

⁄8 DIN Panel Mount

Shop online at

omega.com

User’s Guide

www.omega.com [email protected]

The information contained in this document is believed to be correct, but OMEGA accepts no liability for any errors it contains, and

reserves the right to alter specications without notice.

Servicing North America:

U.S.A. Omega Engineering, Inc.

Headquarters: Toll-Free: 1-800-826-6342 (USA & Canada only)

Customer Service: 1-800-622-2378 (USA & Canada only)

Engineering Service: 1-800-872-9436 (USA & Canada only)

Tel: (203) 359-1660 Fax: (203) 359-7700

e-mail: [email protected]

For Other Locations Visit omega.com/worldwide

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords

our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the

prior written consent of OMEGA ENGINEERING, INC.

FOR WARRANTY RETURNS, please have the

following information available BEFORE

contacting OMEGA:

1. Purchase Order number under which the

product was PURCHASED,

2. Model and serial number of the product under

warranty, and

3. Repair instructions and/or specific problems

relative to the product.

FOR NON-WARRANTY REPAIRS,

consult OMEGA

for current repair charges. Have the following

information available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST

of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems

relative to the product.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.

BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED

RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID

PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return

package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent

breakage in transit.

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship

for a period of 61 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1)

month grace period to the normal five (5) year product warranty to cover handling and shipping

time. This ensures that OMEGA’s customers receive maximum coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service

Department will issue an Authorized Return (AR) number immediately upon phone or written request.

Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no

charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,

including but not limited to mishandling, improper interfacing, operation outside of design limits,

improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of

having been tampered with or shows evidence of having been damaged as a

result of excessive corrosion; or current, heat, moisture or vibration; improper

specification; misapplication; misuse or other operating conditions outside of

OMEGA’s control. Components in which wear is not warranted, include but are not

limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,

OMEGA neither assumes responsibility for any omissions or errors nor

assumes

liability for any damages that result from the

use of its products

in accordance with information provided by OMEGA, either verbal or

written. OMEGA warrants only that the parts manufactured by it will be as

specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR

REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT

THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY

DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are

exclusive, and the total liability of OMEGA with respect to this order, whether

based on contract, warranty, negligence, indemnification, strict liability or otherwise,

shall not exceed the purchase price of the component upon which liability

is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a

“Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2)

in medical applications or used on humans. Should any Product(s) be used in or with any nuclear

installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes

no responsibility as set forth in our basic WARRANTY / DISCLAIMER language, and, additionally,

purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever

arising out of the use of the Product(s) in such a manner.

DPS20

Load cell panel meter and controller

Instruction Manual

1. Panel meter DPS20

Panel meter for load cells, size 96x48mm (1/8 DIN)



-



-

       





-











      -

        

-



  

(see secon 1.12.8)

-





•



(see sec-

on 1.11)

•(see secon 1.12.4)

•(see sec-

on 1.9.5)

•  On Power Up    

(see secon 1.12.14)

•(see

secon 1.12.5)

•(see secon 1.12.6)

•

(see

secon 1.12.13)

•  Fast access    5 

(see secon 1.12.13)

-





(see secon 1.8)

(see secon 1.8)

(see secon

1.8.1)       (see secon

1.8.2)

(see secon 1.12.2)



        



         





(see secon 1.12.7)

1.111.12.4

1.1 How to use this manual

(see secon 1.12.6)

(see secon 1.12.5)

(see secon 1.9.1)

(see secon 1.12.8)

(see secon 1.12.10)



(see secon 1.12.11)

3(see secon 1.12.12)

5(see secon 1.12.13)



(see secon 1.12.14)

(see secon 1.12.17)

   

(see secon 1.12.18)

 



   







1.19





DPS20

Load cell panel meter and controller

Instruction Manual

                  4

             4

                       

                   

                 6

             6

                    6

                     6

         7

            7

       7

                   7

             

               

                  9

     9

(in)      9

          9

              





        







                

              



                   

            

               



3            

                

         



      

                   22

 22

1.2 Index

           

             27

27

                 





      

     

29

29

           

             

          

                   

        

32

32



33

             34

                  34

            34

                  

             

             36

               36

   37

                   

             

             39

            39





               

                  

              



                   42

              44

44



1.3 How to order

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 





DPS20

Load cell panel meter and controller

Instruction Manual



(see secon 1.8)

 



(see secon 1.8)

 

(see Table 1).

1.9.5





1.4 Material included











Figure 1

(see

secon 2)





Figure 1 - Set of units label

1.5 Addional informaon



1.6 Front view

1.7 Rear view

Reading A B

Gross weight on o

Actual tare value o on

‘tare’ funcon acvated o fast ash

Net weight o o

Units (‘stock units’)

on on

Table 1 - Meaning for the front leds ‘A’ and ‘B’











(see secon 1.12)



(see secon 1.12.13)



DPS20

Load cell panel meter and controller

Instruction Manual

1.8 Signal and power connecons

Vexc+

Signal+

Signal-

Sense-

Vexc-



Sense+

7  

(short circuit to ‘Vexc-’)

6  

5  

4  

3  

2  

1  

Figure 2 - Signal connecons



-

sense +sense --





-





sense 

sense +Vexc+

sense -Vexc-



sense 

(see secon 1.16.4)



-





•





 

9 

 

Figure 3 - Power connecons



Vexc+

Signal+ Signal-

Sense-

Vexc-

Sense+

Figure 4 - Example for connecons with 1 load cell.



        

(see secon 1.8.1).

Fuse : to comply with the security regulaon 61010-

1, add to the power line a protecon fuse acng as

a disconnecon element, easily accessible to the op-

erator and idened as a protecon device.

• Power ‘H’ 250 mA me-lag fuse

• Power ‘L’ 400 mA me-lag fuse



 1.16 -





DPS20

Load cell panel meter and controller

Instruction Manual

Digits

 

 

 

 

Reading

 

 

 

 

 

Load cells

 

 

 

 

1.15

 

 



*(values calculated for standard 350 Ohms load cells. For

cells with dierent impedance, the number is limited by the

140 mA available current)

Measure

 (see secon 1.9.2)

 (see secon 1.9.2)

 

 

 Table 2

(and refresh for alarms, analog outputs and bus)

 Table 2

 Table 2

0 % to 99 % signal



 

Power

 

 

 

*(60 seconds) 

 

 



 

 

Conguraon 

Front protecon 

Output and control opons

 

(see secon 2)

Mechanical

 

 

 

 

 

 

 

Temperature

 

 

 

Acquisions / sec. Display refresh Step response

Mode standard 16 acq. / sec. 16 refresh / sec. 63 mSec.

Mode 50 Hz 50 acq. / sec. 16 refresh / sec. 20 mSec.

Mode 60 Hz 60 acq. / sec. 16 refresh / sec. 17 mSec.

Table 2 - Technical data for the congured acquision mode















ModeModE 50.hZ 

         



60.

hZ



1.12.7

1.9 Technical specicaons



DPS20

Load cell panel meter and controller

Instruction Manual

Signal

ranges

Accuracy Max. input

signal

0/100

mVdc 0.05% FS

30 V

0/30

mVdc 0.05% FS

0/20

mVdc 0.05% FS

0/15

mVdc 0.05% FS

0/10

mVdc 0.05% FS

0/5

mVdc 0.05% FS

Table 3 - Input signal ranges





        -



Sensivity‘MV.V’Excita-

on voltage‘V.EXc’(see secon 1.12.2)

Example:with a sensivity conguraon of 2.0000 mV/V

and a congured excitaon voltage of 10 Vdc, the instru-

ment selects the 20 mV input signal range, by calculat-

ing 2 mV/V x 10 Vdc = 20 mV.



Table 3







-



       



-







      

-







1.12.13-









(in)







• 



5(see secon 1.12.13).



(see secon 1.6)



1.9 Technical data (cont.)

(3.78 x 1.89 in)

(3.63 x 1.74 in)







(0.63in)

(2.95in) (0.31in)



DPS20

Load cell panel meter and controller

Instruction Manual

Included funcons Secon

Funcon tare yes 1.11

Auto-tare

automac zero tare

1.12.4

Maximum tare

to prevent undesired

tare acvaons

1.12.7

Scale factor

change the reading

scale

1.12.5

1.12.7

Stock of units

counts units instead of

weight

1.12.6

Modes

high rejecon to 50 Hz

and 60 Hz

1.9.1

Alarms

standard

stability alarms

double setpoint

acvaon delays

deacvaon delays

hysteresis

inverted relay

locked deacvaon

1.12.8

Display lters

xed digits

recursive

‘steps’

le zeros

1.12.10

Rear controls

acvate funcons from

rear terminal

1.12.11

Front key ‘LE’ (3)

acvate funcons from

key ‘LE’

(3)

1.12.12

Fast access (key ‘UP’ (5))

fast access to param-

eters from front key

‘UP’

(5)

1.12.13

On power up

acvate funcons at

power up

1.12.14

Memory

maximum and minimum

1.12.13

Password

blocks access to congu-

raon menu

1.12.17

Troubleshoong func

ons

values for input signal,

excitaon voltage and

excitaon current

1.9.3

1.12.13

Display brightness 5 levels 1.12.17

Table 4 - Funcons included

1.10 Included funcons 1.11 ‘Tare’ funcons included













Example : a truck enters a loading area and is placed on a

weighing system. The instrument indicates that the weight of

the truck is 2.500 Kg. A tare is applied to the instrument, and

now the reading is 0 Kg. The truck enters the loading area

and when it leaves, it is placed on the weighing system again.

Now the reading is 1.550 Kg. This is the weight of the mate

rial loaded on the truck. When the truck leaves the weighing

system the instrument reads -2.500 Kg. Acvate a tare again

to force a reading of 0 Kg or wait for a new truck.

        



• 



(see secon 1.12.11).

•3

3(see

secon 1.12.12).

•

(see

secon 1.12.14).

• 

        

         







       



(see secon 1.12.14).

Max.

Tare MAX.t    



(see secon

1.12.7)



5(see

secon 1.12.15)





DPS20

Load cell panel meter and controller

Instruction Manual



Conguraon menu<

Fast access5

Conguraon menu

 conguraon menu    -



conguraon menu

<

PasswordPASScongu-

raon menu

        

errorcongu-

raon menu       -

-





conguraon menu

congura-

on menu

1.13

‘Fast access’ menu

’

fast access



    

5



 

1.12.15

      

fast accessPassword

PASS -

fast access

-





Operang with the front keypad inside the menus

Key ‘SQ’<<-

  conguraon menu     

<ENTER







Key ‘UP’55fast ac-

cess5



-





Key ‘LE’3 3-



5-



1.12 Conguraon



-





5

‘

Rollback

’



conguraon menu

fast access



















conguraon menu

  <   



  <   

InP

  5  

   -



  <   



InP

  3   





  3   

 

   



Figure 5 - Example of operaon inside the ‘conguraon

menu’ (menu entries are given as example, and may not be the

exactly the same as the instrument menu entries).



DPS20

Load cell panel meter and controller

Instruction Manual



-

(see

Table 5)



Load cell

parameters

Default values

Sensivity 2

mV/V

Nominal weight 1000

Kilos

Excitaon voltage 10

Vdc

Table 5 - Parameters of the load cell





        





Theorecal conguraon of the load cell

Parameters

of the cellcELL

• Decimal pointdP



• Nominal weightLoAd





• SensivityMV.V



• Excitaon voltageV.EXc





(see secon 1.16.5)).

Example : load cell with 1.95 mV/V sensivity and a nominal

value of 5Kg and power 5 Vdc. To read in grams with a deci

mal point, congure the theorecal parameters as indicated

below :

Decimal point : XXXXX.X

Sensivity : 1.95 mV/V

Nominal weight : 5000.0

Excitaon voltage : 5 Vdc



system zero’



sys-

tem zero

Empirical conguraon of the load cell

    





    







           







• 

         Low

weight correconF.Lo<

<

 

Low weight correconF.Lo

• 

High weight correcon

F.hI<

 <

High weight correc

onF.hI

       







Assign the ‘system zero’





• 



System zeroS.ZEr<

 

System zeroS.ZEr



      

Sensivity mV/V M V.V  

     -

        -

password(see secon

1.12.17)

       



-



Scale factorScL.F

(see secon 1.12.7).



DPS20

Load cell panel meter and controller

Instruction Manual

< con-

guraon menu-



1.12.1



conguraon menu



1.13



     

Load cell param-

eters’cELL 

Field correconF.cor



-

1.12.2 

• Decimal pointdP

-



3-



Example : to read in ‘Kg’ with tenths of kilograms, place the

decimal point at ‘XXXXX.X’ and the reading will be always

be shown with 1 decimal.

Changing the posion of the decimal point will only light a

dierent decimal point led, but will not modify or re-scale

the measure of the instrument.

• Sensivity mV/VMV.V





• Nominal weightLoAd





Decimal pointdP-



Example : for a 5 Kg cell, congure a value of 5000 to read

in grams.

• Excitaon voltage V.Exc 



         

(see secon 1.16.5).

Field correconF.cor

1.12.2



•  Low weight correcon F.Lo  



         < 



• High weight correconF.hI





<

System zeroS.ZEr

1.12.2 





Load cell

parameters

Inial

conguraon

Deci

mal point

Sensivity

mV/V

Nominal weight

Excitaon

voltage

5 Vdc

10 Vdc

Field

correcon

High weight

correcon

Low weight

correcon

Low weight

value

High weight

value

System zero

Laboratory

mode



DPS20

Load cell panel meter and controller

Instruction Manual



      

          



• 



• 





• 









Example : weighing system with reading from 0.0 to 2500.0

Kg. When weight is removed from the system, there is al

ways a variable remnant value : 2.2 Kg, 3.1 Kg, -0,7 Kg, ...

This remnant value is associated to the specic imperfecons

of each load cell. Also this remnant value takes some me to

stabilize, approximately 1 second. A manual tare can be ap-

plied each me the load cell is unloaded in order to correct

this error. The ‘auto-tare’ funcon will correct it automa-

cally without operator intervenon, conguring the follow-

ing parameters.

• acvaon value = 5.0

• stability = 1.0

• stability me = 2 seconds

When reading is lower than ‘5.0’, the ‘auto-tare’ system ac

vates, and it will analyze the stability of the signal. When

reading does not change more than ±1.0 counts for a me of

2 seconds, the tare will automacally acvate.

       Maximum tare

‘MAX.t’

Maximum

tare‘MAX.t’

Scale factorScL.F



Example: a weighing system is congured to read in Kg, but

the system is going to be shipped to an area where measure

must be in pounds. The relaon between kilograms and

pounds is: 1 Kg = 2,20462 pounds. Within the scale factor,

congure the mulplier to 220462 and the divider to 100000.

The instrument is now congured to read in ‘pounds’.

Stock unitsStck  





  



Stock units



    

5

Example from the conguraon menu : place 50 units on the

load cell, and check that the instrument is weighing correctly.

Enter the conguraon menu, and at the ‘Stock units’ (‘Stck’)

parameter, within the ‘Advanced conguraon’, introduce

‘50’ as the number of units. Save the value (key ‘SQ’ (<))

and leave the conguraon menu (key ‘LE’ (3) two mes).

The instrument restart and reads 50 units. Add more units

and observe that the reading increases proporonally to the

number of units.

Example from the front key ‘UP’ (5) : congure the func

on ‘Stock units’ to be accessible from the front key ‘UP’ (5)’

(fast access menu) (see secon 1.12.13) and leave the con

guraon menu. Place 50 units on the load cell, and check

that the instrument is weighing correctly. Access the param-

eter ‘Stock units’ through the front key ‘UP’ (5), and cong-

ure the number of units actually on the load cell (50 units).

Save the value (key ‘SQ’ (<)) and leave the fast access menu

(key ‘LE’ (3)). The instrument reads 50 units. Add more units

and observe that the reading increases proporonally to the

number of units

Stock unitsStck

-

Stock unitsStck

3(see secon

1.12.12)(see secon

1.12.11)

Stock unitsStck









DPS20

Load cell panel meter and controller

Instruction Manual

Auto-tareAut.t-





1.12.4

• Acvaon valueSEt

        

      -



• Stability bandbAnd









•   Stability me tIME   

          









        



   



  Maximum tare MAX.t   



1.12.4



 Scale factorScL.F 

1.12.5





Stock unitsStck

1.12.6

 



ModeModE

   1.9.1    

StandardStd

Stability me

Auto-tare

Stability band

Acvaon value

Maximum tare

Advanced conf.

Scale factor

Divider

Mulplier

Standard

Mode

60 Hz

50 Hz

Stock units

Units





DPS20

Load cell panel meter and controller

Instruction Manual







(see secon

2)       (see

secon 1.18)





• Congurable parameters

      

       

        

   

(see Figure 6).

• Acvaon and deacvaon delays







• Stability acvaon



(see Figure 7)

Applicaon : the lling of a tank with liquid is controlled with

a load cell. Upon reaching 5000 liters, the alarm 1 acvates to

stop the lling pump. Aer the pump has stopped, the liquid

is sll moving inside the tank, and this movement is reected

in weight and reading oscillaons. Alarm 2 is congured as

‘stability alarm’ and acvates when the liquid inside the tank

is at rest. At this moment, the tank can be removed safely.

• Second setpoint

      

  

(see Fig

ure 8)

• Inverted relay





• ‘Locked alarms’









        

3



setpoint

hysteresis

Alarm as maximum, no

hysteresis and no delays





acvaon

delay





deacvaon

delay

Alarm as maximum, with

hysteresis and delays





Alarm as minimum

hysteresis and no delays

Figure 6 - Examples of alarms with 1 setpoint



Set points 1 and 2

Alarm 2 as maximum with

stability.





Alarm 1 as maximum.











Figure 7 - Example of alarm with stability



Set point 2

Set point 1

Alarm as minimum, with

double setpoint, no hyster-

esis and no delays





Figure 8 - Example of alarm with double setpoint



DPS20

Load cell panel meter and controller

Instruction Manual

Alarm 1

Setpoint

Hysteresis

Acve

Type of alarm

Setpoint 2

Alarms

Acvaon

delay

Deacvaon

delay

Inverted relay

Locked alarm

Stability Stability band

Stability me

ALr1  ALr2

ALr31.12.8

•

AcveActon

•

Type of alarmTypEMAX

       

   MIn    



•

SetpointSEt



fast access

(see secon 1.12.13).

•

HysteresishySt-

    

        -



  -





•

Acvaon delaydEL.0

         







•

Deacvaon delaydEL.1-

        

       





•  StabilityStbL

 -

        

-



-  Stability bandbAnd 





-   Stability me tIME   









•       Setpoint2

SEt2on





•   Inverted relay r.Inv   on









•   Locked alarmA.Lck on





  3 (see secon 1.12.12)    (see secon

1.12.11).





DPS20

Load cell panel meter and controller

Instruction Manual



        



   

DisplaydISP

• Fixed digitsFIX.d 







• Average lter AVr  

         









•StepsStEP



Example: congure a step of 20 and the reading will change

in steps of 20 counts (‘1420’, ‘1440’, ‘1460’, ...).

•Le zeroLZEr

•Memory of maximumMAX





rSt

-

5(see secon 1.12.13).

•Memory of minimumMIn





rSt

-

5(see secon 1.12.13).

Le zeros

Steps

Average lter 0 to 100

Display Fixed digits Fix digits

Memory of

maximum

Memory of

minimum



DPS20

Load cell panel meter and controller

Instruction Manual

         

   EK (see secon 1.8)  -



EKVexc-



•TaretArE

•  Alarm unlock A.LcK    

(see sec

on 1.12.8).

•Stock unitsStck



(see secon 1.12.6)

        

    





3

3



• TaretArE

•  Alarm unlock A.LcK    

(see sec

on 1.12.8).

• Stock unitsStck



(see secon 1.12.6)

        

    



Rear controls

Tare

Alarm unlock

Stock units

Key LE Tare

Alarm unlock

Stock units



DPS20

Load cell panel meter and controller

Instruction Manual



 fast access      



5-



•5



•

5

   1.12.6   



•

5(see secon 1.9.5). 

5

     <   

3



•        

   



sense+sense-



        









On power upon.Pu

















       



•        

5



5 

<

3

fast access

-



fast access

• Super fast access

  fast access 

5







      





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Omega DPS20-Series Owner's manual

Omega DPS20-Series Owner's manual

Omega DPS20-Series Owner's manual

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