VEGA BAR24 User Manual

4 (1)
VEGA BAR24 User Manual

Level and Pressure

Operating Instructions

VEGABAR 24

+

-

-

DISPLAY

4 ¼ 20 mA

+

VEGADIS 10

 

12 ¼ 36 V DC

E12

0 - 20 bar

p

Safety information

Safety information

The described module must only be installed and operated as described in these operating instructions. Please note that other action can cause damage for which VEGA does not take responsibility.

Note Ex-area

Please note the approval documents attached (yellow binder), and especially the safety data sheet included .

2

VEGABAR 24

Contents

Contents

 

Safety information ........................................................................

2

 

Note Ex-area ................................................................................

2

1

Product description

 

 

1.1

Function and configuration ..................................................

4

 

1.2

Self-monitoring .....................................................................

4

 

1.3

Technical data .......................................................................

5

 

1.4

Approvals .............................................................................

9

 

1.5

Dimensions ...........................................................................

9

2

Mounting ...................................................................................

11

3

Electrical connection

 

 

3.1

Connection information ......................................................

11

 

3.2

Connection plan .................................................................

12

 

3.3

Connection examples ........................................................

13

4

Set-up

 

 

4.1

Adjustment of the basic functions ....................................

14

 

4.2

Menu-guided adjustment with additional functions .........

15

 

4.3

Indicating module ...............................................................

20

5

Diagnosis

 

 

5.1

Maintenance .......................................................................

21

 

5.2

Failure removal ...................................................................

21

6

Instrument modification

 

 

6.1

Interchanging adjustment modules ..................................

23

 

6.2

Exchange of the hygienic form seal on VEGABAR 24 ....

24

VEGABAR 24

3

Product description

1 Product description

1.1 Function and configuration

1.2 Self-monitoring

The VEGABAR 24 process pressure transmitters are efficient instruments for process pressure measurement. The dry CERTEC® ceramic-capacitive measuring cell is used as a pressure sensor element. The process pressure causes a capacitance change within the measuring cell via the diaphragm. This capacitance change is detected by an ASIC (application specific integrated circuit) and converted into a pressure proportional signal by an integral oscillator with microcomputer. Precise digital processing of measured data with highest resolution ensures excellent technical data.

The oscillator is powered by a separate VEGA-signal conditioning instrument, a stabilised power supply unit or a PLC (active input). After adjustment, a standardised current signal of 4 … 20 mA is available which can be displayed (e.g. in PLC-sys- tems) or further processed.

For versions are available for adjustment:

-adjustment module directly on VEGABAR

-adjustment module in external housing (VEGADIS 10)

-via PC with adjustment software (see manual “VEGA Visual Operating (VVO)“)

-in the control room on the signal conditioning instrument

Important electronic components are checked for their function, while internal parameters, such as sensor value, temperature and operating voltage, are monitored to increase reliability.

VEGABAR 20 with the ceramic CERTEC®- measuring cell offers the advantage of continuous self-monitoring. The measuring and reference capacitances of the measuring cell are in a defined ratio over the complete measuring range. Any deviation from these data is a reliable indicator for a malfunction of the measuring cell.

If failures or malfunctions are detected during these routines, a fault signal is triggered via the 4 … 20 mA-output (current jump to

3,6 mA or 22 mA).

4

VEGABAR 24

Product description

1.3 Technical data

Mechanical data

Materials, wetted parts

Process connection

stainless steel 1.4571, PVDF 1)

Diaphragm

ceramic (99,5 % Oxydeceramic)

Seal measuring cell

Viton, Kalrez, EPDM

Materials, non-wetted parts

 

 

Housing

high resistance plastic PBT (Polyester)

Earth terminal

stainless steel 1.4305

Indicating module window

glass

Weight

 

 

VEGABAR

approx. 0,8 … 8 kg (dependent on process

 

 

connection)

Adjustment and indicating elements

 

 

Adjustment of the basic functions

2 keys, 1 rotating switch

Menu-guided adjustment with

 

 

additional function

 

 

-

adjustment elements

4 key

-

indicating elements

DOT-matrix display, 3 lines with 7 figures each

Indicating module

LC-display with

 

 

-

bar graph (20 segments)

 

 

-

digital value (4-digit)

 

 

-

tendency indicators for raising or lowering

 

 

 

values

Electrical data

Connection

Cable entry

PG 13,5 (for cable-ø 5 … 10 mm)

Screw terminals

for conductor cross-sections of up to

 

2,5 mm2

Protective measures

 

Protection 1)

IP 65

Protection class

III

Overvoltage category

III

CE-conformity

VEGABAR 24 meets the requirements of EMC (89/336/EWG) and NSR (73/23/EWG). The conformity has been judged acc. to the following standards

EMC

Emission

EN 50 081 - 1: 1992

 

Susceptibility

EN 50 082 - 2: 1995

NSR

 

EN 61 010 - 1: 1993

1)Use of a suitable seal for the cable in the PG is necessary for maintaining the housing protection. If the seal used does not fit the cable, it should be replaced by a suitable one.

VEGABAR 24

5

Product description

NAMUR-regulations

The NAMUR-regulations NE 21, May 1993 are met.

 

 

 

 

Supply and signal circuit

 

 

 

 

 

 

Supply voltage

12 … 36 V DC

 

 

 

Permissible residual ripple

USS - 1 V

 

 

 

 

Output signal

 

 

 

 

 

 

-

range

3,8 … 20,5 mA

 

 

 

-

resolution

6 µA

 

 

 

 

Current limitation

approx. 22 mA

 

 

 

Fault signal

22 mA (3,6 mA)

 

 

 

Integration time

0 … 10 s adjustable

 

 

Average delay time

150 ms

 

 

 

 

Connection cable

2-wire

 

 

 

 

Max. permissible load

dependent on the supply voltage

 

 

(see load diagram)

 

 

 

 

 

1000

 

 

 

 

 

 

Ohm

750

 

 

 

 

 

 

in

500

 

 

 

 

 

 

total

 

 

 

 

 

 

RL

250

 

 

 

 

 

 

Load

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

18

24

30

36

 

 

 

Voltage of the external energy UH in Volts

Indicating and adjustment circuit

 

 

 

 

 

 

For connection to

VEGADIS 10 and/or the indicating module

Data transmission

digital

 

 

 

 

Connection cable

4-wire (standard cable)

 

Cable length

max. 25 m

 

 

 

 

Transmission reaction

Measuring ranges

 

 

Min. pressure

10 mbarabs

Zero

-20 % … +95 % adjustable of nominal range

Span

3,3 % … 120 % adjustable of nominal range

Turn up

up to +95 %

Turn down

up to 1

: 30

Recommended turn down:

 

 

Accuracy class 0,25

up to 1

: 5

accuracy class 0,1

up to 1

: 10

6

VEGABAR 24

Product description

Measuring ranges

Nominal range

Gauge pressure

Low pressure

 

 

resistance 1)

resistance

Gauge pressure

 

 

 

0

… 0,1 bar

10

bar

-0,1 bar

0

… 0,2 bar

15

bar

-0,2 bar

 

 

 

 

 

0

… 0,4 bar

20

bar

-0,4 bar

0

… 1,0 bar

25

bar

-1,0 bar

0

… 2,5 bar

35

bar

-1,0 bar

0

… 5,0 bar

45

bar

-1,0 bar

0

… 10,0 bar

60

bar

-1,0 bar

 

 

 

 

 

0

… 20,0 bar

90

bar

-1,0 bar

-0,05 … 0,05 bar

10

bar

-0,1 bar

 

 

 

 

-0,1 … +0,1 bar

15

bar

-0,2 bar

-0,2 … +0,2 bar

20

bar

-0,4 bar

-0,5 … +0,5 bar

25

bar

-1,0 bar

-1,0 … +0,0 bar

25

bar

-1,0 bar

-1,0 … +1,5 bar

35

bar

-1,0 bar

-1,0 … +4,0 bar

45

bar

-1,0 bar

 

 

 

 

-1,0 … +10,0 bar

60

bar

-1,0 bar

-1,0 … +20,0 bar

90

bar

-1,0 bar

 

 

 

 

Absolute pressure

 

 

 

0

… 1,0 bar

25

bar

 

0

… 2,5 bar

35

bar

 

 

 

 

 

 

0

… 5,0 bar

45

bar

 

0

… 10,0 bar

60

bar

 

 

 

 

 

 

0

… 20,0 bar

90

bar

 

0

… 40,0 bar

140 bar

 

0

… 60,0 bar

200 bar

 

1) Note nominal pressure stage of the process connection!

VEGABAR 24

7

Product description

Accuracy (similar to DIN 16 086, DIN V 19 259 - 1 and IEC 770)

Deviation

Reference conditions (acc. to IEC 770)

-temperature

-air pressure

Determination of characteristics Characteristics

Deviation in characteristics 1)

-accuracy class 0,25

-accuracy class 0,1 Hysteresis 1) Repeatability 1)

Influence of the ambient temperature

18°C … 30°C rel. humidity 860 kPa … 1060 kPa

limit point adjustment acc. to DIN 16 086 linear

<0,25 %

<0,1 %

<0,02 %

<0,02 %

Average temperature coefficient

 

of the zero signal 1) 2)

 

-

accuracy class 0,25

< 0,15 %/10 K

-

accuracy class 0,1

< 0,05 %/10 K

Long-term stability

 

Long-term drift of the zero signal 1) 3)

< 0,1 %

Other actuating variables

 

Calibration position

standing, diaphragm points downwards

Influence of the installation position

< 0,2 mbar

Vibration resistance

mechanical vibrations with 4 g and

 

 

5 … 100 Hz, tested acc. to the regulations of

 

 

German Lloyd GL-characteristics 2

Operating conditions

Product

Aggregate conditions

gas, steam, liquid up to high viscosity

 

also abrasive and aggressive with suitable

 

material selection of wetted parts

 

acc. to order code

Ambient conditions

 

Ambient temperature

-40°C … +85°C

- indicating module

-20°C … +70°C

Storage and transport temperature

-40°C … +85°C

Product temperature

-40°C … +100°C

1)Relating to the nominal measuring range.

2)In the compensated temperature range of 0°C … +80°C, reference temperature 20°C.

3)Acc. to IEC 770, point 6.1.2 relating to the nominal measuring range.

8

VEGABAR 24

Product description

1.4 Approvals

Ex Zone 2

StEx Zone 10

Ship approval

CENELEC EEx ia IIC

ATEX II 1G EEx ia IIC and WHG

ATEX II 1G EEX ia IIC and ship approval

DVGW (applied)

If the use of approved instruments is required for certain applications, the appropriate legal documents (test reports, test certificates and conformity certificates) must be observed. These are supplied with the appropriate instrument.

1.5 Dimensions

Housing

 

without indicating module

with indicating module

85

~76

72

82

 

Pg 13,5

Earth connection

Breather facility

 

VEGABAR 24

9

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