VEGA BAR41 User Manual

Download

Page 1

Operating Instructions

VEGABAR 41 (4 … 20 mA)

OPERATE t

i ZERO SPAN

123 5678

VEGADIS 10

AM10

4...20mA

E12

Level and Pressure

123 5678

VEGADIS 10

4...20mA

E12

AM10

Page 2

Safety information, Note Ex area

Safety information

Please read this manual carefully, and also take note of country-specific installation standards (e.g. the VDE regulations in Germany) as well as all prevailing safety regulations and accident prevention rules. For safety and warranty reasons, any internal work on the instruments, apart from that involved in normal installation and electrical connection, must be carried out only by qualified VEGA personnel.

2 VEGABAR 41 (4 … 20 mA)

Note Ex area

Please note the attached safety instructions containing important information on installation and operation in Ex areas. These safety instructions are part of the operating instructions and come with the Ex approved instruments.

Page 3

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 and certificates ................................................ 10

1.5 Dimensions ......................................................................... 11

2 Mounting

2.1 Mounting instructions ......................................................... 14

2.2 Compensation of the atmospheric pressure ................... 14

3 Electrical connection

3.1 Connection instructions ..................................................... 14

3.2 Connection diagram .......................................................... 15

3.3 Connection examples ........................................................ 16

4Setup

4.1 Display module ................................................................... 17

4.2 Setup with module

"Adjustment of the basic functions“ .................................. 17

4.3 Setup with module

"Menu-driven adjustment with additional functions“ ........ 19

5 Diagnostics

5.1 Maintenance ....................................................................... 25

5.2 Failure rectification ............................................................. 25

6 Instrument modification

6.1 Exchange of adjustment modules .................................... 26

6.2 Exchange of electronics .................................................... 27

VEGABAR 41 (4 … 20 mA) 3

Page 4

1 Product description

Product description

1.1 Function and configuration

VEGABAR 41 is an efficient pressure transmitter with isolating system for process pressure measurement and hydrostatic level measurement. The hydrostatic pressure of the products acts on the separating diaphragm of the isolating system and is transmitted via the isolating liquid to the metalcapacitive measuring cell. This capacitance change is detected by an ASIC (Application specific integrated circuit) and converted by the internal electronics with microcontroller into a pressure-proportional signal. The precise, high-resolution digital processing of measurement data ensures perfect technical data.

Isolating systems are used to protect the measuring cell against corrosive products or high temperatures. With the right choice of isolating liquid and diaphragm material, these systems can provide a temperature resistance up to 400°C.

The electronics module is powered by a separate VEGA-signal conditioning instrument, a stabilised power supply unit or a PLC (active input). After adjustment, a standard current signal 4 … 20 mA is made available and can be displayed or (e.g. in PLC-systems) further processed.

1.2 Self-monitoring

To improve reliability, the functionality of important electronic components is continuously checked, and internal parameters such as sensor value, temperature and operating voltage are closely monitored.

VEGABAR 41 with the ceramic CERTEC measuring cell offers the advantage of continuous self-monitoring. The measuring and reference capacitances of the measuring cell constitue a predefined ratio over the entire measuring range. Any deviation from these data is a reliable indicator of a malfunction of the measuring cell.

If errors 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).

For carrying out adjustment, the following alternatives are available:

- adjustment module directly on VEGABAR

- adjustment modules in external housing (VEGADIS 10)

4 VEGABAR 41 (4 … 20 mA)

Page 5

Product description

1.3 Technical data

Mechanical data

Materials, wetted parts

Process connection stainless steel 1.4571 Diaphragm stainless steel 1.4571, Hastelloy C276, Tantalum,

Extension stainless steel 1.4571

Materials, non-wetted parts

Housing high resistance plastic PBT (Polyester)

- optional Alu-die-casting, powder-coated Ground terminal stainless steel 1.4305 Window of the display module Lexan

Weight

VEGABAR approx. 0.8 … 8 kg (dependent on the isolating

Adjustment and indicating elements

Adjustment of the basic functions 2 keys, 1 rotary switch Menu-driven adjustment with additional functions

- adjustment elements 4 keys

- indicating elements DOT-Matrix display, 3 lines with 7 figures each Display module LC-display with

PTFE-foil on 1.4571

system)

- bar graph (20 segments)

- digital value (4 digits)

- tendency indicators for rising or falling values

VEGABAR 41 (4 … 20 mA) 5

Page 6

Product description

Nominal measuring range

Gau ge pressure resistance

Low pressure resistance

Gauge press ure

0…0,4 bar / 0…40 kPa 30 bar / 3 000 kPa -0,8 bar / -80 kP a 0…1,0 bar / 0…100 kPa 35 bar / 3 500 kPa -1,0 bar / -100 kP a 0…2,5 bar / 0…250 kPa 50 bar / 5 000 kPa -1,0 bar / -100 kP a 0…5,0 bar / 0…500 kPa 65 bar / 6 500 kPa -1,0 bar / -100 kP a 0…10,0 bar / 0…1 000 kPa 90 bar / 9 000 kPa -1,0 bar / -100 kP a 0…20,0 bar / 0…2 000 kPa 130 bar / 13 000 kPa -1,0 bar / -100 kP a 0…40,0 bar / 0…4 000 kPa 200 bar / 20 000 kPa -1,0 bar / -100 kP a 0…60,0 bar / 0…6 000 kPa 300 bar / 30 000 kPa -1,0 bar / -100 kP a

-0,05…+0,05 bar / -5…+5 kPa 15 bar / 1 500 kPa -0,2 bar / -20 kP a

-0,1…+0,1 bar / -10…+10 kPa 20 bar / 2 000 kPa -0,4 bar / -40 kP a

-0,2…+0,2 bar / -20…+20 kPa 30 bar / 3 000 kPa -0,8 bar / -80 kP a

-0,5…+0,5 bar / -50…+50 kPa 35 bar / 3 500 kPa -1,0 bar / -100 kP a

-1,0…0,0 bar / -100…0 kPa 35 bar / 3 500 kPa -1,0 bar / -100 kPa

-1,0…+1,5 bar / -100…+150 kPa 50 bar / 5 000 kPa -1,0 bar / -100 kP a

-1,0…+4,0 bar / -100…+400 kPa 65 bar / 6 500 kPa -1,0 bar / -100 kP a

-1,0…+10,0 bar / -100…+1 000 kPa 90 bar / 9 000 kPa -1,0 bar / -100 kP a

-1,0…+20,0 bar / -100…+2 000 kPa 130 bar / 13 000 kPa -1,0 bar / -100 kP a

-1,0 …+40,0 bar / -100…+4 000 kPa 200 bar / 20 000 kPa -1,0 bar / -100 kPa

-1,0…+60,0 bar / -100…+6 000 kPa 300 bar / 30 000 kPa -1,0 bar / -100 kP a

A bsolute pressure

0…1,0 bar / 0…100 kPa 35 bar / 3 500 kPa 0…2,5 bar / 0…250 kPa 50 bar / 5 000 kPa 0…5,0 bar / 0 …500 kPa 65 bar / 6 500 kPa 0…10,0 bar / 0…1 000 kPa 90 bar / 9 000 kPa 0…20,0 bar / 0…2 000 kPa 130 bar / 13 000 kPa 0…40,0 bar / 0…4 000 kPa 200 bar / 20 000 kPa 0…60,0 bar / 0…6 000 kPa 300 bar / 30 000 kPa

6 VEGABAR 41 (4 … 20 mA)

Page 7

Product description

Electrical data

Adjustment ranges

Zero adjustable from -20 … +95 % of nominal range Span adjustable from 3.3 … 120 % of nominal range

Supply and signal circuit

Supply voltage 12 … 36 V DC Exd-version Permissible residual ripple U Output signal

- range 3.8 … 20.5 mA

- resolution 6 µA Current limiting approx. 22 mA Fault signal 22 mA (3.6 mA) Integration time 0 … 10 s adjustable Rise time 85 ms (ti = 0 sec; 0 – 63 %) Connection line 2-wire Max. permissible load dependent on the supply voltage

Indicating and adjustment current circuit

For connection to VEGADIS 10 and/or display module Data transmission digital Connection cable 4-wire (standard cable) Max. line length 25 m

(pressure-tight encapsulation) 18 … 36 V DC

≤ 1 V

(see load diagram)

1000

750 500 250

Load RLtotal in Ohm

18 24 30 36

Voltage of the external energy UH in Volts

Connection

Cable entry M20 x 1.5 (for cable-ø 5 … 10 mm) Screw terminals for conductor cross-sections of up to 2.5 mm

Protective measures

Protection

IP 65 Protection class III Overvoltage category II

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 41 (4 … 20 mA) 7

Page 8

Product description

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

Deviation

Reference conditions (acc. to IEC 770)

- temperature 15°C … 35°C

- rel. humidity 45 % … 75 %

- air pressure 860 mbar … 1060 mbar/86 kPa … 106 kPa Determination of characteristics limit point adjustment acc. to DIN 16 086 Characteristics linear Deviation in characteristics incl. hysteresis and repeatability

- Turn Down 1 : 1 < 0.25 % with accuracy class 0.25

- Turn Down up to 1 : 5 typ. < 0.3 % with accuracy class 0.25

- Turn Down up to 1 : 10 typ. < 0.4 % with accuracy class 0.25

Influence of the ambient temperature

Average temperature coefficient of the zero signal

- Turn Down 1 : 1 < 0.15 %/10 K with accuracy class 0.25

- Turn Down up to 1 : 5 typ. < 0.225 %/10 K with accuracy class 0.25

- Turn Down up to 1 : 10 typ. < 0.3 %/10 K with accuracy class 0.25

Long-term stability

Long-term drift of the zero signal

1) 3)

< 0.1 % with accuracy class 0.1

typ. < 0.1 % with accuracy class 0.1

typ. < 0.2 % with accuracy class 0.1

< 0.05 %/10 K with accuracy class 0.1

typ. < 0.075 %/10 K with accuracy class 0.1

typ. < 0.1 %/10 K with accuracy class 0.1

< 0.1 % per 2 years

Other actuating variables

Calibration position upright, diaphragm points downwards Influence of mounting position < 0.2 mbar/20 Pa Vibration resistance mechanical vibrations with 4 g and

5 … 100 Hz, tested acc. to the regulations of German Lloyd GL-characteristics 2

Relating to the nominal measuring range.

In the compensated temperature range of 0°C … +80°C, reference temperature 20°C. Without isolating diaphragm, capillaries, cooling element (see: Influence of the ambient temperature).

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

8 VEGABAR 41 (4 … 20 mA)

Page 9

Product description

Operating conditions

Ambient conditions

Ambient temperature -40°C … +85°C

- with display module -20°C … +70°C Storage and transport temperature -40°C … +85°C Product temperature, dependent on isolating liquid Temperature

- silicone oil -40°C … +150°C / -40°C … +130°C

- silicone oil and cooling element -40°C … +200°C / -40°C … +130°C

- silicone oil and capillaries 1 m -40°C … +200°C / -40°C … +130°C

- vegetable oil -10°C … +130°C / -10°C … +130°C

- vegetable oil and cooling element -10°C … +200°C / -10°C … +130°C

- high temperature oil and cooling elem. -10°C … +400°C / -10°C … +200°C

- high temperature oil and capillaries 1 m -10°C … +400°C / -10°C … +200°C

Additional temperature influence of isolating module

Process connection Temperature coefficient

FA Flange DN 25 PN 40 to DIN 2501,

seal surface to DIN 2526 Form D 1.8

FB Flange DN 40 PN 40 to DIN 2501,

seal surface to DIN 2526 Form D 1.0

FC Flange DN 50 PN 40 to DIN 2501,

seal surface to DIN 2526 Form D 2.0

FE Flange DIN 50 PN 40 with extens. 100 mm 1.9

FG Flange DN 50 PN 40 with extens. 200 mm 2.1

FH Flange DN 80 PN 40 to DIN 2501,

seal surface to DIN 2526 Form D 0.4

FK Flange DN 80 PN 40 with extens. 100 mm 0.5

FN Flange DN 1" 300 lbs to ANSI B 16.5,

seal surface RF 1.8

FO Flange DN 2" 600 lbs to ANSI B 16.5,

seal surface RF 2.0

> 1 bar / p

abs

[mbar/10 K]

4) < 1 bar

abs

- of cooling elements,

dependent on diaphragm-ø 0.1 … 1.5 mbar/10 K

- of 1 m capillary line

dependent on diaphragm-ø 0.1 … 15 mbar/10 K

VEGABAR 41 (4 … 20 mA) 9

Page 10

Product description

1.4 Approvals and certificates

Approvals

- Ex Zone 2

- StEx Zone 10

- Ship approval

- CENELEC EEx ia IIC

- ATEX II 1G EEx ia IIC

- ATEX II 2G EExd ia IIC

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

CE conformity

VEGABAR 41 meets the requirements of EMC (89/336/EWG) and NSR (73/23/EWG). Conformity has been judged acc. to the following standards. EMVG Emission EN 50 081 - 1: 1992

NSR EN 61 010 - 1: 1993

NAMUR regulations

Full compliance with the NAMUR-regulations NE 21 and NE 43.

Susceptibility EN 50 082 - 2: 1995

10 VEGABAR 41 (4 … 20 mA)

Page 11

Product description

1.5 Dimensions

Housing without indicating module with indicating module

~76

Pg 13,5

Ver sion plastic PBT

Ground connection

~76

Ver sion Alu-die casting

M20x1,5

Ground connection

156

~76

Version Alu-die casting in EExd

Ground connection

½" NPT

VEGABAR 41 (4 … 20 mA) 11

Page 12

Process fittings

Product description

Cooling element

Standard

100

FA, FB, FC FH FN, FO

D = outer flange diameter b = flange thickness k = diameter of hole circle d

= diameter of holes

= seal ledge diameter

= extension diameter

f = seal ledge strength R

= extension length

= diaphragm diameter

Standard

FE, FG, FK

Flange connection to DIN 2501, seal ledge to DIN 2526 Form D

Order Flange Holes Seal ledge Extension code siz e D b k No. d2d

fRLd

FA DN 25 / PN 40 115 22 85 4 14 68 2 –– –– –– FB DN 40 / PN 40 150 18 110 4 18 88 3 –– –– –– FC DN 50 / PN 40 165 20 125 4 18 102 3 –– –– – – FE 100 48.3 47 FG 200 48.3 47 FH DN 80 / PN 40 200 24 160 8 18 138 3 –– –– –– FK 100 76 72

Flange connection to ANSI B 16.5, seal ledge RF

FN DN 1" / 300 lbs 125 22 89 4 20 51 2 FO DN 2" / 600 lbs 165 32 127 8 20 92 6.4

12 VEGABAR 41 (4 … 20 mA)

Page 13

Product description

Tube isolating module for mounting between flanges with connection to DIN 2501

Order DN PN D Mb code

RC 50 6 … 400 95 54.5

Tube isolating module with connection to DIN 11 851

Order DN PN G1 L2 D2 d6 g m code

RF 50 25 Rd78x1/6 156 70 68.5 11 18

Tube isolating module with Clampconnection

Order DN PN L D d D1D2Mb code

RH 2" 40 1566456.3567548

VEGABAR 41 (4 … 20 mA) 13

Page 14

Mounting, Electrical connection

2 Mounting

2.1 Mounting instructions

VEGABAR can be mounted in any position. Cable entries must point downwards to avoid moisture ingress. For this purpose the housing can be rotated by 330° in relation to the mounting part.

A seal, appropriate for the connection, must be used for mounting. This seal is either supplied with VEGABAR or must be provided by the customer.

2.2 Compensation of the atmospheric pressure

3 Electrical connection

3.1 Connection instructions

The electronics in VEGABAR 41 requires a supply voltage of 12 … 36 V DC. It is provided in two-wire technology, i.e. supply voltage and current signal are led to the terminals via the same two-wire connection cable.

This external energy is provided via a separate power supply unit:

- power supply unit, e.g. VEGASTAB 690

- processing unit with integrated DC current source (e.g. active PLC-input)

- VEGAMET or VEGADIS 371

Make sure that the external energy source is reliably separated from the mains circuits acc. to DIN VDE 0106, part 101. The abovementioned VEGA instruments meet this requirement, and protection class III is therefore ensured.

The external energy source must supply a terminal voltage of at least 12 V to the transmitter. The actual ter minal voltage on the transmitter depends on the following factors:

- output voltage of the external energy source under nominal load.

- electrical resistances of the connected instruments in the circuit (see Connected instruments, load resistor).

On instruments for gauge pressure measurement, the atmospheric pressure is compensated via a breather facility integrated in the housing.

14 VEGABAR 41 (4 … 20 mA)

Page 15

Electrical connection

Note the following instructions for electrical connection:

- Connection must be made according to the specific installation standards (e.g. in Germany acc. to the VDE-regulations).

- Terminal voltage must not exceed 36 V, to avoid damage to the electronics.

- Electrical connection must have a preventative measure against inadvertent polarity reversal.

- The wiring between VEGABAR and the power supply can be carried out using standard two-wire cable.

- Screened cable is recommended if strong electromagnetic interference is to be expected. The shielding must be grounded at the sensor end.

- If overvoltages are expected, we recommend the installation of VEGA-overvoltage arresters.

- In the cable connection, a seal must be used which fits the cable.

- For instrument version EExd (pressuretight encapsulation) screened cable must be used for the instrument connection. Note the installation regulations.

3.2 Connection diagram

Note:

An ammeter for local control of the output current can be connected to terminals 1 and 3. This measurement can be made during operation without interrupting current on the supply line.

VEGABAR with display module

Ammeter for local control

Function ground

321

Plug connection

8765

Display module

VEGADIS 10 with display module

0 - 20 bar

–+

Supply voltage 12 … 36 V DC 4 … 20 mA

If screened cable is used, the screening should be grounded in the terminal compartment and the ground terminal outside on the housing must be grounded according to regulations. The terminals are connected to each other in the housing.

VEGABAR 41 (4 … 20 mA) 15

0 - 20 bar

Page 16

3.3 Connection examples

Supply via power supply unit

Processing is carried out using an indicating instrument

Ammeter for local control

+ – –

1 2 3

VEGABAR terminals

Supply via a PLC with active input circuit

Processing is carried out by a PLC with active input circuit.

Ammeter for local control

analogue / digital indicating instrument

Power supply unit

–

Electrical connection

+ – –

1 2 3

VEGABAR terminals

PLC

–

PLC

16 VEGABAR 41 (4 … 20 mA)

Page 17

Setup

4 Setup

Electrical connection and setup can be simplified by temporarily mounting the cover or the display module on VEGABAR laterally or downwardly displaced.

VEGABAR

+ 4 ¼ 20 mA

12 ¼ 36 V DC E12

87654321

DISPLAY

VEGADIS 10

Tighten screws lightly

Display module

4.1 Display module

Digital value

- 4 digital and decimal point

- basic function module: indicates a permanent bar measurement range

- menu-driven module: allows individual scaling of bar measurement range

Connection is made via a plug connector according to the "Electrical connection“ section.

4.2 Setup with module "Adjustment of the basic functions“

Adjustment elements

Rotary switch: Select requested function

Key +: Modify

OPERATE t

ZERO SPAN

Adjustment system

• Select the required function with the rotary

switch.

• Change the value with the "+“ and "–“ keys.

• Reset rotary switch to OPERATE, the ad-

justed values are transferred to the EEPROM-memory. They remain there even in case of voltage drop.

Adjustment

For adjustment of zero and span, an ammeter must be connected to terminals 1 and 3. The measured value is identical to the output current.

value (increase

Key –: Modify value (decrease)

Tendency indication

Bar graph

(e.g. process pressure zero or vessel empty)

• Set rotary switch to zero

• By pushing the "+“ and "–“ keys (simulta-

neously) the current jumps directly to 4 mA

1 Adjustment of zero

Digital value

or set it to 4 mA by pushing the "+“ and "–“ keys.

Adjustment range of zero:

-20 % … +95 % of the nominal range (corre-

sponds to turn of up to +95 %)

VEGABAR 41 (4 … 20 mA) 17

Page 18

Setup

2 Adjustment of span

(e.g. process pressure or vessel level at maximum)

• Set rotary switch to span

• By pushing the "+“ and "–“ keys (simultaneously) the current jumps directly to 20 mA or set it to 20 mA by pushing the "+“ and "–“ keys.

Adjustment range of span:

3.3 % … 120 % of the nominal range (corre-

sponds to turn down 1 : 30)

Note:

- A modification of zero does not influence the span.

- It is also possible to adjust currents for partial fillings or partial pressures, e.g. 8 mA for 25 % and 16 mA for 75 %. VEGABAR automatically calculates the current values for 0 % or 100 % (only possible at ≥ 3.3 %).

Integration time

An integration time ti of 0 … 10 s can be adjusted for damping of pressure shocks.

Procedure

• Set rotary switch to t

• By pushing the "-“ key 10 times make sure that the integration time is set to 0 s

• For every 1 s requested integration time, push the "+“ key once

The integration time is the time required by the current output signal to reach 90 % of the actual level after a sudden change of the process pressure.

18 VEGABAR 41 (4 … 20 mA)

Page 19

Setup

4.3 Setup with module "Menu-driven adjustment with additional functions“

Adjustment elements

Indication of:

- measured value

- functions in menu

▼ Jump to the menu below

with the OK key

▲ Reset to the menu above

with the OK key

Depending on parameter: change value (increase) or choose out of a list

OPERATE

3.00

mbar

Depending on parameter: change value (decrease) or choose out of a list

–>

–

The adjustment with the multifunctional module is menu-orientated and is made via the four keys in conjunction with the text display. The move from the measured value indication to the main menu is made with the "OK“ key. Use the "→“ key to change within a menu from one menu item to another.

Branching points

A branching point is shown by the ▼ symbol and enables a jump to the menu below with the "OK“ key. In this menu you can find parameters which are linked (possibly in other submenus).

Choose menu item or interrupt adjustment

Depending on the menu item, save the adjusted value or change the menu level

Reset

A reset is shown by the ▲ symbol and enables a jump back to the menu above with the "OK“ key.

Automatic jump back to measured value indication is triggered 60 minutes after the last key push.

Parameters have no ▲ or ▼ symbol. The value of the parameters can be modified with the "+“ and "–“ keys or chosen from the list. When these keys are pushed once, the value flashes first. When pushed again, the value is modified. The modified value can be saved with the "OK“ key. Push the "→“ key to interrupt input (without saving the modification).

Certain parameters can be displayed but not modified.

VEGABAR 41 (4 … 20 mA) 19

Page 20

Menu schematic

Setup

Operate

0.2

mbar

Ad-

just-

ment

Adjust

with

press.

Measured value indication

Calcu-

lation

Adjust

without

press.

Unit

0.0

mbar

psi kPa

Output Simula-

Unit

0.0

mbar

psi kPa % Scal. mA

Current

output

4-20mA

20-4mA

Scaling

indica-

tion

0%=

Fault

signal

22mA

Escape

3.6mA

Escape

The scaling can be carried out only if in the menu item "unit“ the option "scal“ had been previously chosen.

100%=

1000

Decimal

point

888.8

Escape

On sensors with a measuring range < 1 bar the unit

mbar

can be chosen instead of

Offset

correc-

tion

Offset

corr. OK?

Zero

0.0

mbar

bar

Span

100.0

mbar

Escape

tion

Sim.

xx.x

mbar

Sensor

unpres-

surized?

Zero

4.000

Span

4.000

Escape

20 VEGABAR 41 (4 … 20 mA)

Page 21

Setup

Additional funct.

Sensor

data

Escape

Lan-

guage

Lan-

guage

English

Reset

Reset OK ?

Escape

Franc. Ital. Español Deutsch

Fabr.-

Date

49.98

The values indicated here (min. and max. values) can be set to the present value by pushing the "+“ and "–“ keys simultaneously.

P min

-0.3

mbar

Use the arrow key to move to the right in the menu plan.

Reset

Now!

OK ?

P max

150

mbar

1) 1) 1)

Temp.

30.7

°C

T min

23.5

°C

T max

36.2

°C

Diagno-

stic no.

- - -

Escape

Adjust

with

press.

Escape

Scaling indica-

tion

In the menu items with these symbols, you can move to the top or bottom with the "OK“ key.

Light grey menu points are only displayed if necessary (dependent on the instrument version).

Span

100.0

mbar

Lan-

guage

English

Franc. Ital. Español

White letters indicate the parameters which can be modified with the "+“ or "–“ key and saved with the "OK“ key.

Sensor or measured value information which cannot be modified in these positions are in italics.

List These options can be selected with the "+“ or "–“ key and saved with the "OK“ key.

Deutsch

VEGABAR 41 (4 … 20 mA) 21

Page 22

Setup

Adjustment taking the current pressure into account (live adjustment)

Live adjustment comprises two steps: 1 Adjustment of zero 2 Adjustment of span

The appropriate output current is indicated via the DOT-matrix.

1 Adjustment of zero

(e.g. process pressure zero or vessel empty)

Set the current value to 4.000 mA

Zero

4,000

with the "+“ or "–“ key. Then push the

"OK“ key.

2 Adjustment of span

(e.g. process pressure or vessel level max.)

Set the current value to 20.000 mA

Span

20,000

with the "+“ or "–“ key. Then push the

"OK“ key.

Note:

- A modification of zero does not influence the adjusted span.

- Push “+” and “-” simultaneously for standard adjustment of zero/span. The value jumps directly to 4 mA/20 mA.

- In the case of a high turn down, the "+“ and "–“ should generally be pushed simultaneously for adjustment (due to resolution).

- When pushing the "+“ or "–“ keys individually, the output current remains at the last value, it takes on the adjusted value only after saving with the "OK“ key.

- It is also possible to adjust currents for partial fillings or partial pressures, e.g. 8 mA for 25 % and 16 mA for 75 %. VEGABAR then automatically calculates the current values for 0 % or 100 % (only possible with a delta >3.3 %).

Adjustment without taking the current pressure into account (dry adjustment)

Adjustment without pressure comprises four steps: 1 Selection of the unit in which the adjustment

is to be carried out 2 Offset correction 3 Adjustment of zero 4 Adjustment of span

The offset correction (only in mode gauge pressure) defines the reference position for the measurement. It can be carried out:

- before or after adjustment of zero and

span

- before or after installation of VEGABAR.

VEGABAR must be unpressurised for the offset correction!

Adjustment without pressure can be carried out with the sensor installed or not installed (e.g. workroom). Any currently existing pressure has no effect on the adjustment.

1 Selection of the unit

Adjust

without

Choose the unit with the "+“ or "–“ key. Save the selected unit with the

press.

"OK“ key.

Unit

0.0

mbar

psi kPa

22 VEGABAR 41 (4 … 20 mA)

Page 23

Setup

3 Adjustment of zero

Zero

Adjust zero with the "+“ or "–“ key

0,0

and save with the "OK“ key.

mbar

4 Adjustment of span

Span

Adjust span with the "+“ or "–“ key

100,0

and save with the "OK“ key.

mbar

Note:

- A modification of zero does not influence the span, i.e. the final value of the measuring range will simply be shifted.

- By pushing the "+“ and "–“ keys, the output current remains on the last value, after saving with the "OK“ key, the output current takes on the adjusted value.

Evaluation

Adjustment of the integration time

An integration time ti of 0 s ... 10 s

can be adjusted with the “+” or “-”

shocks. The adjusted value can be saved with the "OK“ key.

key for damping of pressure

Indication scaling

In operating condition, the actual measured pressure is displayed on the display module:

- as a bar graph with 20 segments

- as a 4-digit digital value.

Scaling

indica-

tion

0%=

100%=

0 Escape

1000

Decimal

point

888.8

Bar graph and digital value relate to the adjusted measuring range and change in proportion to the current output. Digital values < –10 % or > 110 % are shown as flashing figures.

As a result of scaling, the 4 mA or 20 mA user-specific current output values are sent to the display module as 4-digit digital values.

Outputs

Current output/Selection of the characteristics

Selection of the indicated unit

The actually measured pressure is

Unit

0.0

indicated on the DOT-matrix in the

mbar

measured value indication. The

psi

appropriate unit can be chosen

kPa

with the "+“ or "–“ key and the "OK“

key from a list. When choosing the

Scal.

unit "Scal.“, the following menu

items are available.

The current output provides the actual measured pressure as an analogue current signal 4 … 20 mA depending on the adjustment.

The characteristics can be also

Current

output

4-20mA

inverted, i.e. switched to 20 ... 4 mA with the "+“ or "–“ keys and the

20-4mA

"OK“ key

Fault signal

The fault signal is triggered via the current output if, during continuous self-monitoring, failures, damage or interference of the measuring cell or the electronics are detected.

You can choose whether the failure

Fault

signal

current should be 22 mA or 3.6 mA

22mA

3.6mA

VEGABAR 41 (4 … 20 mA) 23

with the "+“ or "–“ keys and the "OK“ key.

Page 24

Setup

Simulation

Simula-

You can set with the "+“ or "–“ keys

tion

an individual pressure or %-value to check the outputs of VEGABAR and

Sim.

the connected components. The set

xx,x

value flashes during activated simu-

mbar

lation. The simulation can be

stopped with the "OK“ key.

Additional functions

Sensor data

Important sensor data can be displayed via the DOT-matrix for information and diagnostic purposes:

- manufacturing date

- pointer function (p

- actual temperature value (Temp)

- pointer function (T

- diagnostic number

Addi-

tional

funct.

min

max

min

max

)

Language

Lan-

guage

Lan-

guage

English

Franc. Ital. Español Deutsch

Reset

Reset OK ?

Reset

Now!

OK ?

VEGABAR comes adjusted to the language in which it is ordered. The languages German, English, French, Italian or Spanish can be chosen with the "+“ or "–“ key and the "OK“ key.

The reset function deletes the adjusted values and resets the parameters to the default values. The adjustment data again correspond to the nominal measuring range.

Sensor

data

Fabr.

P min

P max

Tem p.

date

49.98

The min. and max. values can be set to the actual value by pushing the "+“ and "–“ keys simultaneously.

24 VEGABAR 41 (4 … 20 mA)

150

-0.3

mbar

1) 1) 1)

30.7

°C

T min

23.5

°C

T max

36.2

°C

Diagno-

stic no.

- - -

Page 25

Diagnostics

5 Diagnostics

5.1 Maintenance

VEGABAR process pressure transmitters are maintenance-free.

5.2 Failure rectification

Fault signals

VEGABAR provides maximum reliability with its self-test and continuous self-monitoring. If however malfunctions occur, VEGABAR diagnosis distinguishes between atypical process conditions and faults in the VEGABAR.

Atypical process conditions

Exceeding or falling short of measuring range limits (fault signal extinguishes when the measured value is again in the measuring range).

Failure in VEGABAR

Failure in the electronics, interference or damage in the measuring cell.

The following table assists in analysis of fault signals.

Reason Fault signal via

Clea rly "OPERATE Bar graph 0 % outside ???? or 100 % Cu rrent measuring bar“ digital value value range flashes 3.6 mA

Overload Bar graph 0 % range or 100 %, of the digital value meas. cell four segments

Failure in all segments VEGABAR flash

DOT-matrix Bar graph Current

Digital indication output

or >21.6 mA

flash

On instruments with menu-driven adjustment with additional functions, the possible reasons are displayed under the menu item "Diagnosis-no.“ in case of failure.

Diagnosis-no. Meaning

1 No frequency from C/f-converter

2 Frequency signal of the capacitor not

within the limit values

3 Frequency signal of the reference

capacitor not within the limit values

4 Frequency signal temperature not

within the limit values

7 Communication error to EEPROM

9 Error in EEPROM CRC-checksum

11 Process fitting or electronics unit has

been exchanged (appears for approx. 20 s after first switching on after exchange)

Troubleshooting

If the displayed value does not correspond to the level in the vessel or to the process pressure, the following measures must be taken:

- check the pressure compensation (only with gauge pressure measuring ranges)

- check the electrical connection.

VEGABAR 41 (4 … 20 mA) 25

Page 26

Diagnostics, Instrument modification

6 Instrument modification

Checking pressure compensation

Open the housing of VEGABAR. The measured value must not change. However, if the displayed value changes, compensation of the atmospheric pressure is not ensured, which will lead to distortion of the measured value. Check the breather on the VEGABARhousing.

Checking the electrical components

–+

1 2 3

Ammeter for local control

External energy source

–

Voltage Current

–

Voltage

- the terminal voltage on VEGABAR must be at least 12 V DC

Current

Current value Condition

3.8 … 20.5 mA standard range for the output

0 mA signal line interrupted

< 3.6 mA sensor electronics or pressure

22 mA shortcircuit in the signal line,

current

sensor element defective

sensor electronics or pressure sensor element defective

6.1 Exchange of adjustment modules

Display module

Module for basic functions

Module for menu-driven adjustment

VEGABAR

The modular construction of VEGABAR allows retrofitting, interchange or removal of the display module. Data previously saved (e.g. adjustment values) are not stored in the adjustment module but in an EEPROM of the sensor electronics and therefore readjustment is not necessary. The connection of the modules is made via a 4-pole plug connection.

Module without adjustment

26 VEGABAR 41 (4 … 20 mA)

Page 27

Instrument modification

Exchange of the adjustment module

Removal of the adjustment module

• Separate VEGABAR from the power supply

• Loosen the screws on the upper side of the housing and remove the cover or the display module

• Loosen connection cables from the terminals, if necessary pull out the plug connection of the display module

• Remove the two screws of the adjustment module

• Remove adjustment module and pull out plug connection

Insertion of an adjustment module

• Plug the plug connection of the new adjustment module into the plug-in socket of the sensor electronics

• Fasten the new adjustment module

• Reconnect the connection cables, if necessary, also the cable from the display module

• Close cover or display module of VEGABAR

• Reconnect VEGABAR to power supply

6.2 Exchange of electronics

You first have to remove the adjustment module, as described in chapter "6.1 Exchange of adjustment modules“, in order to exchange the complete electronic module of VEGABAR.

Ground screw

Fixing screw

Plug connection

• Remove the ground screw and the two smaller fixing screws connecting the electronic unit with the housing

• Pull the electronic unit to the top and pull out the plug connection

• Proceed in reverse sequence when installing the new electronics module

Note:

No new adjustment is necessary after exchanging the electronics module. When switching on the first time (connection of the supply voltage) after exchange of the electronics units, it takes approx. 20 s until the current measured value is displayed.

VEGABAR 41 (4 … 20 mA) 27

Page 28

VEGA Grieshaber KG Am Hohenstein 113 D-77761 Schiltach Germany Phone +49 (0) 7836 50-0 Fax +49 (0) 7836 50-201 E-Mail info@de.vega.com

www.vega.com

ISO 9001

The statements on types, application, use and operating conditions of the sensors and processing systems correspond to the latest information at the time of printing.

Technical data subject to alterations

2.23 561 / Octobre 2001