VEGA D91 User Manual

Operating Instructions

Hydrostatic pressure transmitter

PROF I

D91 (Profibus PA)

PROCESS FIELD BUS

BUS

0 - 20 bar

Level and Pressure

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 Pressure transmitter D91 (Profibus PA)

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.

Contents

Safety information ........................................................................ 2

Note Ex area ................................................................................ 2

1 Product description

1.1 Function and configuration .................................................. 4

1.2 Types and versions ............................................................. 5

1.3 Technical data....................................................................... 7

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 ..................................................... 15

3.2 Wiring plan .......................................................................... 16

4Setup

4.1 Setting the Profibus PA address ...................................... 17

4.2 Setup with module

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

4.3 Setup with adjustment software

VEGA Visual Operating (VVO) ......................................... 25

5 Diagnostics

5.1 Maintenance ....................................................................... 33

5.2 Failure rectification ............................................................. 33

6 Instrument modification

6.1 Exchange of adjustment modules

in the processing unit ........................................................ 34

Pressure transmitter D91 (Profibus PA) 3

1 Product description

Product description

1.1 Function and configuration

D91 pressure transmitters, which incorporate an isolating system, are efficient instruments for hydrostatic level measurement. The hydrostatic pressure of the medium acts on the separating diaphragm of the isolating system and is transferred via the isolating liquid to a ceramic-capacitive CERTEC The pressure on this measuring cell effects 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 the integrated electronic module with microcontroller. Precise, high-resolution digital processing of measurement data ensures excellent technical data.

Isolating systems are used to protect the measuring cell against aggressive products or high temperatures. By selecting the suitable isolating liquid and diaphragm material, systems with a temperature resistance up to 400°C are possible.

The electronics module is powered by a Profibus DP - PA segment coupler. The measured pressure is transmitted as a digital signal via the bus cable to the processing system and can be displayed on the indicating module.

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.

measuring cell.

The pressure transmitters with ceramic CERTEC

measuring cell offer the advantage of continuous self-monitoring: measuring and reference capacitances of the measuring cell constitute 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, fault signals are triggered according to the Profibus PA specification.

The pressure transmitter D91 consists of two parts, the transmitter and the processing unit. Both parts are connected via a threewire screened cable (depending on the version, with or without breather capillaries). The processing unit contains the adjustment elements (address switch, keys and LCD) and the terminals for the Profibus PA cable.

Transmitter

Processing unit

0 - 20 bar

Profibus PA cable

4 Pressure transmitter D91 (Profibus PA)

Product description

Profibus PA version

The instrument profile of the pressure transmitter D91 is according to the profile specification version 3.0. The instrument master file (GSD) is supplied with the pressure transmitter D91. In addition, the GSD is available as a download file from the VEGA homepage (www.vega.com).

Adjustment and indication

The following adjustment versions are available:

- menu-driven adjustment (4 keys and DOTMatrix) in the processing unit

- via PC with the adjustment software VEGA Visual Operating (VVO)

- optional, processing unit equipped with an indicating module.

1.2 Types and versions

Housing with terminals

Cable outlet axial

Cable outlet lateral

Plug connection lateral

Pressure transmitter D91 (Profibus PA) 5

Product description

Nominal measu rin g range Gauge pressure resistanLow pressure resistance

Gauge pressure

0…0.4 bar / 0…40 kPa 30 bar / 3 000 kPa -0.8 bar / -80 kPa 0…1.0 bar / 0…100 kPa 35 bar / 3 500 kPa -1.0 bar / -100 kPa 0…2.5 bar / 0…250 kPa 50 bar / 5 000 kPa -1.0 bar / -100 kPa 0…5.0 bar / 0…500 kPa 65 bar / 6 500 kPa -1.0 bar / -100 kPa 0…10.0 bar / 0…1 000 kPa 90 bar / 9 000 kPa -1.0 bar / -100 kPa 0…20.0 bar / 0…2 000 kPa 130 bar / 13 000 kPa -1.0 bar / -100 kPa 0…40.0 bar / 0…4 000 kPa 200 bar / 20 000 kPa -1.0 bar / -100 kPa 0…60.0 bar / 0…6 000 kPa 300 bar / 30 000 kPa -1.0 bar / -100 kPa

-0.05…+0.05 b ar / -5…+5 kPa 15 bar / 1 500 kPa -0.2 bar / -20 kPa

-0.1…+0.1 b ar / -10…+10 kPa 20 bar / 2 000 kPa -0.4 bar / -40 kPa

-0.2…+0.2 b ar / -20…+20 kPa 30 bar / 3 000 kPa -0.8 bar / -80 kPa

-0.5…+0.5 b ar / -50…+50 kPa 35 bar / 3 500 kPa -1.0 bar / -100 kPa

-1.0…0.0 bar / -100…0 kPa 35 bar / 3 500 kPa -1.0 bar / -100 kPa

-1.0…+1.5 b ar / -100…+150 kPa 50 bar / 5 000 kPa -1.0 bar / -100 kPa

-1.0…+4.0 b ar / -100…+400 kPa 65 bar / 6 500 kPa -1.0 bar / -100 kPa

-1.0…+10.0 b ar / -100…+1 000 kPa 90 bar / 9 000 kPa -1.0 bar / -100 kPa

-1.0…+20.0 b ar / -100…+2 000 kPa 130 bar / 13 000 kPa -1.0 bar / -100 kPa

-1.0 …+40.0 bar / -100…+4 000 kPa 200 bar / 20 000 kPa -1.0 bar / -100 kPa

-1.0…+60.0 b ar / -100…+6 000 kPa 300 bar / 30 000 kPa -1.0 bar / -100 kPa

Absolute 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 Pressure transmitter D91 (Profibus PA)

Product description

1.3 T echnical data

Mechanical data

Transmitter materials, wetted parts

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

Extension stainless steel 1.4571

Transmitter materials, non-wetted parts

Transmitter housing - Alu die casting, powder-coated

Materials of the processing unit

Housing high resistance plastic PBT (Polyester) Ground terminal stainless steel 1.4305 Window of the indication module Lexan

Weight

Transmitter approx. 0.8 … 8 kg (depending on isolating

Processing unit approx. 480 g

Adjustment and indicating elements (in the processing unit)

Menu-driven adjustment with additional functions

- adjustment elements 4 keys

- indicating elements DOT-matrix display, 3 lines with 7 digits each Version without adjustment module

- adjustment element 8-pole mini coding switch for adjustment of the

Indication module LC-display with

PTFE foil on 1.4571

- stainless steel 1.4571

system)

bus address

- bar graph (20 segments)

- digital value (4 digits)

- tendency indicators for rising or falling values

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 9 … 32 V DC

Current consumption 10 mA ± 1 mA Integration time 0 … 50 s Rise time 70 ms (ti = 0 sec; 0 – 63 %)

Pressure transmitter D91 (Profibus PA) 7

(delivered by the segment coupler)

Product description

Connection cable, processing unit – Profibus PA

Cable entry M20 x 1.5 (for cable ø 5 … 9 mm) Screw terminals for conductor cross-sections of up to 2.5 mm Recommended bus cable types - SINEC 6XV 830-5AH10 (Siemens AG)

- SINEC L2 6XV1 830-35H10 (Siemens AG)

- 3079 A (Belden)

Connection cable, processing unit – Transmitter

Cable entry M20 x 1.5 (for cable ø 5 … 9 mm) Screw terminals for conductor cross-sections of up to 2.5 mm Transmitter

- with fixed cable outlet 3-wire screened with breather capillaries

- with cable connection terminals 3-wire screened

Protective measures

Protection

- transmitter with fixed cable outlet IP 68

- transmitter with terminal housing IP 66/IP 67

- transmitter with plug connection IP 66/IP 67

- processing unit IP 66/IP 67 Protection class III Overvoltage category III

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

< 0.1 % with accuracy class 0.1

typ. < 0.1 % with accuracy class 0.1

typ. < 0.2 % with accuracy class 0.1

The use of a properly fitting cable seal in the cable connection is necessary for maintaining the housing protection. If the seal used does not fit the cable, it should be replaced by a suitable one.

8 Pressure transmitter D91 (Profibus PA)

Product description

Influence of the ambient temperature (without considering the isolating systems)

Average temperature coefficient of the zero signal

- Turn Down 1 : 1 < 0.15 %/10 K with accuracy class 0.25 < 0.05 %/10 K with accuracy class 0.1

- Turn Down up to 1 : 5 typ. < 0.225 %/10 K with accuracy class 0.25 typ. < 0.075 %/10 K with accuracy class 0.1

- Turn Down up to 1 : 10 typ. < 0.3 %/10 K with accuracy class 0.25 typ. < 0.1 %/10 K with accuracy class 0.1

Long-term stability

Long-term drift of the zero signal

< 0.1 % per 2 years

Other actuating variables

Calibration position upright, diaphragm points downwards Vibration resistance mechanical vibrations with 4 g and

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

Operating conditions

Ambient conditions

Ambient temperature -40°C … +85°C

- with indicating module -20°C … +70°C

Storage and transport temperature -40°C … +85°C Product temperature, depending 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 a. cooling element -10°C … +400°C / -10°C … +200°C

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

> 1 bar / p

abs

< 1 bar

abs

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

Acc. to IEC 770, item 6.1.2 relating to the nominal range.

Pressure transmitter D91 (Profibus PA) 9

Additional temperature influence of isolating diaphragms

Process connection Temperature coefficient

[mbar/10 K]

FA Flange DN 25 PN 40 acc. to DIN 2501,

seal surface acc. to DIN 2526 form D 1.8

FB Flange DN 40 PN 40 acc. to DIN 2501,

seal surface acc. to DIN 2526 form D 1.9

FC Flange DN 50 PN 40 acc. to DIN 2501,

seal surface acc. to DIN 2526 form D 2.0

FE Flange DIN 50 PN 40 with extension 100 mm 1.9

FG Flange DN 50 PN 40 with extension 200 mm 1.9

FH Flange DN 80 PN 40 acc. to DIN 2501,

seal surface acc. to DIN 2526 form D 0.4

FK Flange DN 80 PN 40 with extension 100 mm 1.0

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

seal surface RF 1.8

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

seal surface RF 2.0

- of cooling elements, depending on diaphragm ø 0.1 … 1.5 mbar/10 K

- of 1 m capillary cable, depending on diaphragm ø 0.1 … 15 mbar/10 K

Product description

1.4 Approvals and certificates

Approvals

- Ex Zone 2

- CENELEC EEx ia IIC

- ATEX II 1G EEx ia IIC

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

CE conformity

The pressure transmitter D91 meets the requirements of EMC (89/336/EWG) and NSR (73/23/EWG). Conformity has been judged acc. to the following standards: EMC Emission EN 50 081 - 1: 1992

NSR EN 61 010 - 1: 1993

NAMUR regulations

Full compliance with the NAMUR regulations NE 21, May 1993.

10 Pressure transmitter D91 (Profibus PA)

Susceptibility EN 50 082 - 2: 1995

Product description

1.5 Dimensions

Transmitter housing

ø 76

ø 41,6

Isolating diaphragm

Tube isolating diaphragm for mounting between flanges with connection acc. to DIN 2501

Order DN PN D Mb code

RC 50 6 … 400 95 54.5

Tube isolating diaphragm with connection acc. 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 diaphragm with Clamp-connection

Order DN PN L D d D1D2Mb code

RH 2" 40 1566456.3567548

Pressure transmitter D91 (Profibus PA) 11

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