VEGA D94 User Manual
Operating Instructions
Hydrostatic pressure transmitters
PROF I
D94 (Profibus PA)
PROCESS FIELD BUS
BUS
0 - 20 bar
Level and Pressure
p
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 D94 (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
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 ....................................................................... 6
1.4 Approvals and certificates .................................................. 9
1.5 Dimensions ......................................................................... 10
2 Mounting
2.1 Mounting instructions ......................................................... 12
2.2 Compensation of the atmospheric pressure ................... 12
3 Electrical connection
3.1 Connection instructions ..................................................... 13
3.2 Wiring plan .......................................................................... 14
4 Setup
4.1 Setting the Profibus PA address ...................................... 15
4.2 Setup with module
"Menu-driven adjustment with additional functions" ........ 17
4.3 Setup with adjustment software
VEGA Visual Operating (VVO) ......................................... 23
5 Diagnostics
5.1 Maintenance ....................................................................... 31
5.2 Failure rectification ............................................................. 31
6 Instrument modification
6.1 Exchange of adjustment modules
in the processing unit ........................................................ 32
6.2 Exchange of hygienic form seal on D94 .......................... 33
Pressure transmitter D94 (Profibus PA) 3
1 Product description
Product description
1.1 Function and configuration
D94 pressure transmitters are efficient instruments for hydrostatic level measurement. A
dry ceramic-capacitive CERTEC® measuring
cell is used as the pressure sensor element.
The hydrostatic pressure effects a capacitance change on the ceramic 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.
The electronics module is powered by a
Profibus DP - PA segment coupler. The
measured pressure is transmitted via the
bus cable as digital signal 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.
The pressure transmitters with ceramic
CERTEC® measuring cell offer the advantage
of continuous self-monitoring: the 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 D94 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
Profibus PA version
The instrument profile of the pressure transmitter D94 is according to the profile specification version 3.0. The instrument master file
(GSD) is supplied with the pressure transmitter D94. 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.
4 Pressure transmitter D94 (Profibus PA)
Product description
1.2 Types and versions
Housing with terminals
Nominal measuring range Gauge pressure resistanLow pressure resistance
Gauge pressure
0…0.1 bar / 0…10 kPa 15 bar / 1 500 kPa -0.2 bar / -20 kPa
0…0.2 bar / 0…20 kPa 20 bar / 2 000 kPa -0.4 bar / -40 kPa
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 bar / -5…+5 kPa 15 bar / 1 500 kPa -0.2 bar / -20 kPa
-0.1…+0.1 bar / -10…+10 kPa 20 bar / 2 000 kPa -0.4 bar / -40 kPa
-0.2…+0.2 bar / -20…+20 kPa 30 bar / 3 000 kPa -0.8 bar / -80 kPa
-0.5…+0.5 bar / -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 bar / -100…+150 kPa 50 bar /5 000 kPa -1.0 bar / -100 kPa
-1.0…+4.0 bar / -100…+400 kPa 65 bar / 6 500 kPa -1.0 bar / -100 kPa
-1.0…+10.0 bar / -100…+1 000 kPa 90 bar / 9 000 kPa -1.0 bar / -100 kPa
-1.0…+20.0 bar / -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 bar / -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
Cable outlet
axial
Cable outlet lateral Plug connection
lateral
Pressure transmitter D94 (Profibus PA) 5
Product description
1.3 Technical data
Mechanical data
Transmitter materials, wetted parts
Process connection stainless steel 1.4435 or 1.4571
Diaphragm sapphire-ceramic® (99.9 % Oxide-ceramic)
Seal, measuring cell Viton, EPDM, Hifluor, Kalrez
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
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
- stainless steel 1.4571
bus address
- bar graph (20 segments)
- digital value (4 digits)
- tendency indicators for rising or falling values
Weight
Transmitter approx. 1.4 kg
Processing unit approx. 480 g
6 Pressure transmitter D94 (Profibus PA)
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 9 … 32 V DC
Current consumption 10 mA ± 1 mA
Integration time 0 … 50 s
Rise time 70 ms (ti = 0 sec; 0 – 63 %)
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)
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
1)
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
(delivered by the segment coupler)
- SINEC L2 6XV1 830-35H10 (Siemens AG)
- 3079 A (Belden)
2
2
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.
Pressure transmitter D94 (Profibus PA) 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 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
1)
- 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
< 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
Long-term stability
Long-term drift of the zero signal
2)
< 0.1 % per 2 years
Other actuating variables
Vibration resistance mechanical vibrations with 4 g and
5 … 100 Hz, tested acc. to the regulations of
German Lloyd GL-characteristics 2
1)
In compensated temperature range of 0°C … +80°C, reference temperature 20°C.
2)
Acc. to IEC 770, item 6.1.2 relating to the nominal range.
8 Pressure transmitter D94 (Profibus PA)
Product description
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
seal material of the measuring cell
- Viton -20°C … +100°C (1 h up to +150°C)
- EPDM -40°C … +100°C (1 h up to +150°C)
- Hifluor -10°C … +100°C (1 h up to +150°C)
- Kalrez 0°C … +100°C (1 h up to +150°C)
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 D94 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
Susceptibility EN 50 082 - 2: 1995
NAMUR regulations
Full compliance with the NAMUR regulations NE 21, May 1993.
Pressure transmitter D94 (Profibus PA) 9
1.5 Dimensions
Transmitter housing
ø 76
67
Product description
ø 41,6
93
46
ø 41,6
ø 41,6
46
Processing unit
with display module
38 82
∅
M20x1,5
with protective cover
63
5
135
118
108
72100
85
90
139
130
10 Pressure transmitter D94 (Profibus PA)
Product description
Process connections
Ø 41,6
Ø 41,6
Ø 41,6
76,5 (115*)
121 (160*)
121 (160*)
SW 46
SW 46
121 (160*)
SW 60
24,5
Ø 41,6
Ø 78
LA
Ø 41,6
Ø 78
RA
Ø 41,6
G 1½ A
Ø 55
GG
72,5 (111*)
121 (160*)
121 (160*)
SW 46
SW 46
121 (160*)
Ø 41,6
Ø 90
LB
Ø 41,6
Ø 92
RB
SW 60
25
1½ " NPT
GN
Ø 41,6
SW 46
121 (160*)
SW 46
121 (160*)
Ø 41,6
Ø 64
CA
Ø 41,6
Ø 65,8
Ø 105
AA
121 (160*)
SW 46
21
M44 x 1,25
BA
SW 46
121 (160*)
SW 46
121 (160*)
Ø 41,6
Ø 84
TA
Ø 41,6
Ø 100
PA
120
42,5
160
Ø 48
Ø 115
23
FT4
Ø 38
Ø 115
*) VBUS version
FG4
Pressure transmitter D94 (Profibus PA) 11
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