How it Works
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D84
User Manual
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User Manual
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VEGA D84 User Manual

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Operating Instructions
Hydrostatic pressure transmitters D84
p
Contents
Safety information ........................................................................ 2
1 Product description
1.2 Electronics version without adjustment .............................. 5
1.3 Electronics version with integrated adjustment
in connection housing .......................................................... 7
1.4 Electronics for connection to VEGADIS 12 ........................ 8
1.6 Approvals and certificates ................................................ 13
1.7 Dimensions ......................................................................... 14
2 Mounting
2.1 Mounting instructions ......................................................... 18
2.2 Compensation of the atmospheric pressure ................... 18
Contents

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 D84

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
3 Electrical connection
3.1 Connection instructions ..................................................... 19
3.2 Terminal assignment .......................................................... 20
3.3 Connection to external connection housing
VEGABOX 01 ..................................................................... 21
3.4 Connection examples ........................................................ 22
4 Setup
4.1 Adjustment structure ......................................................... 23
4.2 Sensor without adjustment ................................................ 24
4.3 Sensor with adjustment insert, adjustment
in the sensor ....................................................................... 24
4.4 Setup with HART® handheld ............................................. 26
5.5 Adjustment with PC directly on the sensor ...................... 32
6 Diagnostics............................................................................... 40
7 Instrument modification
7.1 Retrofitting the adjustment insert ...................................... 41
7.2 Exchange of hygienic form seal on D84 .......................... 41
Pressure transmitter D84 3

1 Product description

Product description

1.1 Function and configuration

The pressure transmitter D84 is an efficient instrument for hydrostatic level measurement. A dry ceramic-capacitive CERTEC measuring cell is used as pressure sensor element.
Pressure transmitter D84
Measuring cell: dry, ceramic-capacitive Diaphragm: flush, ceramic Series: flanged version Standard application: All kind of level measurements, best suited for food processing and pharmaceutical industries.
The pressure effects a capacitance change on the measuring cell. 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.
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.
®
Output signal
The output signal is transferred as a digital or analogue signal from the pressure transmitter to the signal conditioning instrument:
• analogue output signal
- unstandardised (in conjunction with VEGA signal conditioning instrument)
- 4 … 20 mA standardised
• digital output signal (VBUS) for connection to a digital VEGA signal conditioning instru­ment (VEGAMET 514V, 515V or VEGALOG
571)
4 Pressure transmitter D84
Product description

1.2 Electronics version without adjustment

Electronics version A: Pressure transmitter for connection to VEGA signal conditioning instruments
e.g. IP 66
VEGABOX 01
VEGAMET
VEGALOG
Zum Anschluss an
For connection to
Druckmessumformer mit
pressure transmitters with
analogem Ausgangssignal
analog output
12310
TRANSMITTER
VEGABOX 01
11 12
-
+
-
+
VEGAMET
VEGALOG
e.g. IP 67
Electronics version B: Pressure transmitter for connection to VEGA signal conditioning instruments (digital transmission VBUS)
e.g. IP 66
e.g. IP 67
VEGABOX 01
Zum Anschluss an
For connection to
Druckmessumformer mit
pressure transmitters with
analogem Ausgangssignal
analog output
12310
11 12
-
+
-
TRANSMITTER
+
VEGABOX 01
VEGAMET
VEGAMET
VEGALOG
VEGALOG
Pressure transmitter D84 5
Electronics version I: Pressure transmitter 4 … 20 mA, HA RT®, VVO
4-20mA
51234
-
+
4...20mA 12V...36V DC
Klemmeinsatz
terminal
e.g. IP 66
VEGABOX 01
Zum Anschluss an
For connection to
Druckmessumformer mit
pressure transmitters with
analogem Ausgangssignal
analog output
12310
TRANSMITTER
VEGABOX 01
11 12
-
+
-
+
e.g. IP 67
HART® handheld
4-20mA
+
4...20mA
51234
-
12V...36V DC
Klemmeinsatz
terminal
VVO
250 Ω
250 Ω
Product description
PLC/DCS
PLC/DCS
6 Pressure transmitter D84
Product description

1.3 Electronics version with integrated adjustment in connection housing

Electronics version K: Pressure transmitter 4 … 20 mA, HART®, VVO adjustable
S
Op
Zt
i
43215
+
-
4...20mA 12V...36V DC
Bedieneinsatz
operating unit
PLC/DCS
e.g. IP 66
e.g. IP 67
S
+
4...20mA 12V...36V DC
Bedieneinsatz
HART® handheld
VEGABOX 01
Zum Anschluss an
For connection to
Druckmessumformer mit
pressure transmitters with
Op
Zt
i
43215
-
operating unit
analogem Ausgangssignal
analog output
12310
TRANSMITTER
VEGABOX 01
11 12
-
+
-
+
250 Ω
PLC/DCS
250 Ω
VVO
Pressure transmitter D84 7

1.4 Electronics for connection to VEGADIS 12

VEGADIS 12
DISPLAY
+ -
TRANSMITTER
5876321101112
OPERATE
POINT
DISPLAYTRANSMITTER
END
ZERO
OPERATE
POINT
END
ZERO
VEGADIS 12
DISPLAY
+ -
TRANSMITTER
5876321101112
OPERATE
POINT
DISPLAYTRANSMITTER
END
ZERO
OPERATE
POINT
END
ZERO
51234
VEGADIS 12
Zum Anschluß an
For connection to
+
-
12V...36V DC
terminal
Klemmeinsatz
51234
VEGADIS 12
Zum Anschluß an
For connection to
+
-
12V...36V DC
terminal
Klemmeinsatz
Electronics version L: Pressure transmitter 4 … 20 mA, HA RT®, VVO
e.g. IP 66
e.g. IP 67
HART® handheld
VEGADIS 12
VEGADIS 12
Product description
250 Ω
250 Ω
VVO
PLC/ DCS
PLC/ DCS
8 Pressure transmitter D84
Product description

1.5 Technical data

Nominal measuring range Gauge pr. resistance Low pr. re sistance
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 k Pa 90 bar / 9 000 kPa -1.0 b ar / -100 k Pa
-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
Mechanical data
Materials, wetted parts
Process connection stainless steel 1.4435 or 1.4571 Diaphragm saphire-ceramic
Materials, non-wetted parts
Housing Alu (seawater resistant) Pe-powder coated,
stainless steel 1.4571 External connection housing high resistance plastic PBT (Polyester) Ground terminal stainless steel 1.4305 Window of the display module safety glass
Pressure transmitter D84 9
®
Product description
Weights
Basic weight without housing approx. 1.6 kg External housing approx. 400 g
Adjustment and display elements
Pressure transmitter
- terminal insert without adjustment elements
- adjustment insert 2 keys, 1 rotary switch
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 (analogue transmission, 4 … 20 mA), electronics version A, C, I and K
Supply voltage 12 … 36 V DC permissible residual ripple U
- at 100 Hz … 10 kHz U Output signal
- terminal insert - analogue transmission (not standardised)
- adjustment insert 4 … 20 mA (adjustable) Current limitation approx. 22 mA Fault signal 22 mA (3.6 mA) Integration time 0 … 10 s Rise time 70 ms (ti = 0 sec; 0 … 63 %) Max. permissible load see load diagram:
≤ 1 V
SS
≤ 10 mV
SS
- 4 … 20 mA
Load in Ω
900
600
300
Supply voltage
12
18 24 30 36
10 Pressure transmitter D84
in V
Product description
Supply and signal circuit (analogue transmission, 4 … 20 mA), additional data for electronics version L
Supply voltage for pressure transmitters in conjunction with VEGADIS 12
- without display 12 … 36 V DC
- with display 17 … 36 V DC Max. input current 150 mA Current signal range 3.5 … 22 mA Max. permissible load see load diagram:
Load diagram with display
Load in Ω
700
500
300
100
18
24 30 36
Supply voltage in V
Supply and signal circuit on VEGA signal conditioning instruments (digital signal transmission VBUS), additional data for electronics version B
Supply voltage 25 … 36 V DC, from VEGAMET (VBUS) or
from VEGALOG 571 with EV input card Data transmission digital (VBUS) Connection cable 2-wire screened Cable length max. 1000 m
Integrated overvoltage protection (option)
Nominal response DC voltage
- protective diode 40 V
- gas separator 650 V Nominal leakage current
- gas separator 20 kA
Connection cables
Cable entry
- housing 2 x M20x1.5 (for cable ø 5…9mm or 9…12mm)
- external connection housing 2 x M20x1.5 (for cable ø 5…9mm or 9…12mm) Screw terminals
- sensor for wire cross-sections of up to 2.5 mm
- external connection housing for wire cross-sections of up to 2.5 mm
2
2
Pressure transmitter D84 11
Product description
Protective measures
1)
Protection IP 66, IP 67, IP 68 VEGABOX 01 IP 66 and 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 … 30°C
- humidity 45 % … 75 %
- air pressure 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
2)
- 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 stability of the zero signal
3)
< 0.1 % per 2 years
Other actuating variables
Calibration position upright, diaphragm points downwards Influence of the installation 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
1)
Maintaining the housing protection IP 66 or IP 67 requires the use of a seal that correctly fits the cable in the cable entry. If the supplied seal does not fit, a suitable seal must be provided by the customer.
2)
In compensated temperature range of 0°C … +80°C, reference temperature 20°C.
3)
Acc. to IEC 770, item 6.3.2 relating to the nominal range.
12 Pressure transmitter D84
Product description
Operating conditions
Ambient conditions
Ambient temperature -40°C … +85°C
- with indicating module -10°C … +60°C Storage and transport temperature -50°C … +100°C Product temperature
- Viton seal -20°C … +100°C
- EPDM seal -40°C … +100°C
- Kalrez seal 0°C … +100°C

1.6 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
D84 pressure transmitters meet 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: 1993
Susceptibility EN 50 082 - 2: 1995
NAMUR regulations
Full compliance with the NAMUR regulations NE21 and NE 43.
Pressure transmitter D84 13

1.7 Dimensions

Housings
ø 76
67
Product description
ø 75
ø 41,6
91
46
63
93
ø 41,6
ø 41,6
46
90
14 Pressure transmitter D84
Product description
Process connections D84
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
FG4
*) VBUS version
Pressure transmitter D84 15
Pressure transmitter accessory Welded socket
G 1½
19
ø 65
GG
Product description
Rd 65 x
1/
6
21
ø 60
BA
40
ø 79,6
LA
ø 72/6xM6
40
ø 79,6
LB
Rd 78 x
1/
6
35
ø 50
ø 55
RB
21,5
ø 48,6
ø 51,6
CA
ø 84/4xM10
20
ø 125
AA
33
20
Rd 65 x
ø 38
ø 43
RA
ø 82/4xM8
ø 165
PA
1/
6
16 Pressure transmitter D84
Product description
VEGABOX 01
38 72
ø 5
M20x1,5
with protective cover
135
118
108
139
85
72100
130
Pressure transmitter D84 17

2 Mounting

Mounting

2.1 Mounting instructions

The pressure transmitter 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.
An appropriate connection seal must be used for mounting. This seal is either sup­plied with the pressure transmitter or must be provided by the customer.
2.2 Compensation of the atmos­pheric pressure
On instruments for gauge pressure meas­urement, the atmospheric pressure is com­pensated via a breather facility integrated in the housing.
Pressure transmitter with housing
- via an integrated breather facility (PTFE
use 1)), protection IP 66
- via the capillaries of a special cable con-
nected to the terminals, protection IP 67
Pressure transmitter with direct cable outlet
- via the capillaries of a special cable con-
nected to the terminals, protection IP 68
We recommend leading the special cable into the external connection housing VEGABOX 01 (accessory) and carrying out the pres­sure compensation via the integrated breather facility there.
External connection housing
Observe the following instructions:
- as a rule, there must be the same atmos-
pheric pressure on the breather facility as on the vessel
- the pressure compensation must be done
in a dry environment
- with vertical wall mounting, cable entries
must point downward to avoid moisture ingress and buildup on the breather facility.
1)
air permeable and humidity blocking
18 Pressure transmitter D84
Electrical connection

3 Electrical connection

3.1 Connection instructions

The electronics in the pressure transmitter requires a supply voltage of 12 … 32 V DC. It is designed in two-wire technology, i.e. the supply voltage and the digital output signal are led via the same two-wire cable to the terminals.
This external energy is provided via a sepa­rate power supply unit, e.g.:
- power supply unit VEGASTAB 690
- processing unit with integrated DC voltage source (e.g. active PLC input)
- VEGAMET, VEGALOG 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 devices meet this require­ment and protection class III is therefore guaranteed.
The external energy source must provide a terminal voltage of at least 12 V on the trans­mitter. The actual terminal voltage on the transmitter depends on the following factors:
- output voltage UH of the external energy source under nominal load.
- electrical resistance of the connected in­struments in the circuit (see connected instruments, load resistance).
Note the following instructions for electrical connection:
- Connection must be made according to the country-specific installation standards (e.g. in Germany acc. to the VDE regulations).
- The terminal voltage must not exceed 36 V, to avoid damage to the electronics.
- The electrical connection must have a pro­tective measure against polarity reversal.
- Connection of Ex sensors only by qualified personnel.
- The wiring between pressure transmitter and power supply can be made with standard two-wire cable.
- If strong electromagnetic interference is expected, screened cable is recom­mended. The screening must be done on both ends. Note the installation regulations for use in Ex areas.
- In case of overvoltages, we recommend the use of pressure transmitters with inte­grated overvoltage protection or the instal­lation of VEGA overvoltage arresters.
- In the cable entry, a seal correctly fitting the cable should be used.
Safety information for Ex applications
As a rule, do all connecting work in the com­plete absence of line voltage. Always switch off the power supply before you carry out connecting work on the sensors. Protect yourself and the instruments.
Qualified personnel
Instruments used in Ex areas must be installed only by qualified personnel. The qualified personnel must observe and under­stand the mounting regulations and the supplied type approval certificates and conformity certificates.
If an instrument is used in hazardous areas, the respective regulations, conformity certifi­cates and type approvals of the sensors, separators or safety barriers must be noted (e.g. DIN VDE 0165).
Pressure transmitter D84 19
Electrical connection
Sensors used in Ex areas must be con­nected only to intrinsically safe circuits. The permissible electrical values are stated in the conformity certificate or the type approval certificate.
Intrinsically safe circuits with more than one active instrument (instrument delivering elec­trical energy) are not allowed. Please note the special installation regulations (DIN VDE
0165).
Certain pressure transmitters are provided with a warning label informing of measures to be taken to avoid the danger of electrostatic discharge. Note the content of the warning label.

3.2 Terminal assignment

Direct cable outlet
Breather capillaries
Suspension cable
br
For supply or to the process-
+
bl
ing system (4 … 20 mA,
-
12 … 36 V DC or VBUS)
ge
Screen
(only for adjustment insert in external housing)
Electronics version B
Digital output signal for connection to a digital VEGA signal conditioning instrument (VBUS)
Zum Anschluss an
For connection to
VBUS-Auswertgeräte
VBUS-signal conditioning instruments
1234
-+
-+
Klemmeinsatz
terminal
V
Field Communication
BUS
Internal connection
Supply and digital measuring signal from and to the digital VEGAMET 514V and 515V signal condition-
–
ing instrument or VEGALOG 571
+
processing system
Electronics version I
4 … 20 mA output signal, remote parameter setting through PC and HART® handheld
4-20mA
-
+
4...20mA 12V...36V DC
Klemmeinsatz
terminal
51234
+
–
–
Power supply
+
12 … 36 V DC
Electronics version A
for connection to VEGA signal conditioning instruments
Zum Anschluss an
For connection to
VEGA-Auswertgeräte
VEGA-signal conditioning instruments
51234
-
+
Klemmeinsatz
terminal
+
–
Supply or processing from the VEGAMET
–
signal conditioning instrument
+
12 … 36 V DC
Electronics version K
4 … 20 mA output signal with integrated adjustment and remote parameter setting through PC and HART® handheld
S
Zt
+
-
4...20mA 12V...36V DC
Bedieneinsatz
operating unit
Op
i
43215
+
–
–
Power supply 12 … 36 V DC
+
20 Pressure transmitter D84
Electrical connection
Electronics version L
4 … 20 mA output signal with adjustability via the external connection housing VEGADIS 12, as well as remote parameter adjustability via PC and HART® handheld
Zum Anschluss an
For connection to
VEGADIS 12
51234
-
+
12V...36V DC
Klemmeinsatz
terminal
Connection housing VEGADIS 12

3.3 Connection to external connection housing VEGABO X 01

Adjustment insert in external connection housing
Zum Anschluss an
For connection to
Druckmessumformer mit
pressure transmitters with
analogem Ausgangssignal
analog output
1
Pressure transmitter with direct cable outlet
231011 12
TRANSMITTER
VEGABOX 01
+
4... 20mA
-
­+
+
For supply or to the processing system (4 … 20 mA, 12 … 36 V DC)
–
Breather capillaries
Suspension cable
+
br
bl
–
ge
+
Control instrument (4 … 20 mA measurement)
–
Screen
Pressure transmitter D84 21
Electrical connection

3.4 Connection examples

Note:
An ammeter for local control of the output current can be connected to terminals 1 and 3. This measurement can be carried out during operation without interrupting the supply cable.
The following connection examples are valid for direct connection to the terminals of the pres­sure transmitter. When using the external connection housing, the connection is made to the respective terminals of the housing.
Supply through a power supply unit
Processing is done by an indicating instrument.
Ammeter for local control
analogue / digital indicating
+ - -
1 2 3
Pressure transmit­ter terminals
instrument
External energy source
U
U
K
4 … 20 mA
A
-
U
H
~
+
Supply through a VEGA signal conditioning instrument
Standard wiring for non-standardised output.
Ammeter for local control
+ - -
1 2 3
Pressure transmitter terminals
U
K
Analogübertragung, unnormiert
0/4 … 20 mA
DISBUS
!
Supply through a PLC with active input circuit
Processing is done by the PLC
Ammeter for local control
+ - -
1 2 3
Pressure transmitter terminals
U
K
4 … 20 mA
PLC
­+
22 Pressure transmitter D84
Setup

4 Setup

4.1 Adjustment structure

The hydrostatic pressure transmitters come with or without adjustment capability.
After connection to the supply voltage, the electronics carries out a self-test (approx. 2 sec.) and the current in this signal circuit (sensors with analogue output signal) takes on a value of > 21.6 mA.
Sensors with adjustment (electronics version A and C)
Sensors with electronics version A deliver a pressure-proportional current as measured value and are not adjustable. All settings such as adjustment, density correction etc. are carried out via the signal conditioning instrument. The sensors with electronics version C come preadjusted according to the measuring range of the sensor (factory set­ting). In unpressurised condition, they con­sume a current of 4 mA. With a pressure at the measuring range final value, they con­sume a current of 20 mA.
Sensors with adjustment insert in the sensor (electronics version K)
The adjustment insert with selection switch allows:
- zero adjustment "z" = empty adjustment
- span adjustment "s" = full adjustment
- adjustment of an integration time (time) "ti"
Adjustment in external connection hous­ing VEGADIS 12 (electronics version L)
The adjustment insert with selection switch (VEGADIS 12 with display) allows:
- zero adjustment
- span adjustment
- adjustment of an integration time (time)
- adjustment of a value for zero point (empty)
- adjustment of a value for span (full)
- adjustment of the decimal point for the displayed value
Adjustment with HART® handheld (electronics version I, K and L)
The hydrostatic pressure transmitters with electronics version I, K and L can be ad­justed with the HART® handheld like other HART® capable instruments. A manufacturer specific DD (Device Description) is not nec­essary. The sensors work with the HART standard menus.
Adjustment of VEGA signal conditioning instrument VEGAMET (electronics version A and B)
Electronics version A delivers a non-stand­ardised output signal to a VEGAMET with analogue input.
Electronics version B transfers the measured value digitally (VBUS) to a digital VEGAMET (514V, 515V, 614V).
The signal conditioning instrument itself, as well as the pressure transmitter, can be oper­ated by means of the standard six-key ad­justment field (with clear dialog text display) on the signal conditioning instrument.
®
Pressure transmitter D84 23
Setup
Adjustment with PC and adjustment program VVO (electronics version B, I, K and L)
With the adjustment program VVO (VEGA Visual Operating) on the PC you can conven­iently adjust the pressure transmitters with electronics version B, I, K and L. The PC communicates with the sensor through the interface converter VEGACONNECT 2 or the standard RS 232 interface cable. A digital adjustment signal is superimposed on the signal and supply cable. The adjustment can be carried out from any location on the signal cable, on the sensor directly, on the signal conditioning instrument or on the VEGALOG processing system.

4.2 Sensor without adjustment

Sensors with electronics version C have no adjustment capability and come preset to the stated measuring range.

4.3 Sensor with adjustment insert, adjustment in the sensor

Sensors with electronics version D and K are equipped with an adjustment insert.
2
1
1 Reduce value 2 Rotary switch 3 Increase value
S
Zt
+
-
4...20mA 12V...36V DC
Bedieneinsatz
operating unit
Op
i
43215
3
With the rotary switch you can select four switch positions: s - span z - zero ti - time (integration time) Op - operate (operating status)
24 Pressure transmitter D84
Setup
S
Op
Zt
i
43215
+
-
4...20mA 12V...36V DC
Bedieneinsatz
operating unit
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.
1 Adjustment of zero
(e.g. process pressure zero or empty ves­sel)
• Set rotary switch to zero.
• By pushing the "+" and "–" keys simultane­ously, the current jumps directly to 4 mA or you can adjust a current of 4 mA with the "+" and "–" keys.
Adjustment range of zero:
-20 % … +95 % of nominal measuring range
(corresponds to a turn up of up to +95 %)
Note:
- A modification of zero does not influence the span, i.e. the measuring range final value is simply shifted.
- It is also possible to adjust currents for partial fillings or partial pressures, e.g. 8 mA for 25 % and 16 mA for 75 %.The pressure transmitter then automatically calculates the values for 0 % or 100 % (only possible with a level difference >3.3 %).
Integration time
An integration time ti of 0 … 10 s can be ad­justed to damp pressure shocks.
Procedure
• Set rotary switch to ti.
• By pushing the "-" 10 times, make sure that the integration time is set to 0 s.
• For each 1 s of requested integration time, the "+" key has to be pushed once.
2 Adjustment of span
(e.g. process pressure or level at maximum)
• Set rotary switch to span.
• By pushing the "+" and "–" keys simultane­ously, the current jumps directly to 20 mA or you can adjust a current of 20 mA with the "+" and "–" keys.
Adjustment range of span:
3.3 % … 120 % of nominal measuring range
(corresponds to a turn down 1 : 30)
Pressure transmitter D84 25
Setup

4.4 Setup with HART® handheld

Sensors with electronics versions I, K and L can be set up with the HART® handheld. A special DD (Data Device Description) is not necessary. Just connect the HART® handheld to the sensor signal cable after you have connected the sensor to supply voltage.
250 Ω
Note:
If the resistance of the voltage supply is less than 250 Ω, a resistor must be looped into the signal/connection cable during adjustment. The digital adjustment and communication signals would otherwise be short-circuited through insufficient resistance of e.g. the supply voltage source or the processing system. In such case, communication with the sensor would not be ensured. Simply connect the adjustment resistor in parallel to the connection socket of the HART
®
handheld.
+
PLC
-
Ri < 250 Ω
26 Pressure transmitter D84
Setup
The most important adjustment steps
On the following four pages you see a menu schematic of the HART® handheld in conjunc­tion with pressure transmitters D80 … D87. The most important adjustment steps are marked in the menu schematic with the letters A … D. If you are not familiar with HART handheld, please note:
After entering a parameter, first push the "
ENTER
" key. The adjustment is saved in the
handheld, but not in the sensor itself.
Generic: SENSOR PV LVR
0.000 mbar
10.000 mbar
HELP DEL ESC ENTER
Empty adjustment without medium
After you have pushed " push "
SEND
" (here in the example for the
4.1
(5.1)
ENTER
", you have to
min. adjustment), to transfer the input to the sensor.
Generic: SENSOR
1PV LRV 2 PV URV
®
After a moment, you are asked to switch the system from manual to automatic operation. Confirm with "OK"
Generic: SENSOR
– WARNING –
Return control loop to automatic control
OK
and then with "
Generic: SENSOR
1PV LRV 2 PV URV
HELP HOME
HOME
".
You are now in the initial menu.
Generic: SENSOR Online (general)
1 Sensor unit 2 P V 80.945 mbar 3 PV Analog output 4PVLRV 5 PV URV
HELP SAVE
HELP SEND HOME
After pushing "
SEND
", a warning is displayed that you are about to change device output and for safety reasons, you should switch your system to manual operation. Push "OK" and the adjustment is now transferred to the sensor.
Generic: SENSOR
– WARNING – Pressing „OK“ will change device output
Put loop in manual
ABORT OK
Pressure transmitter D84 27
HART® menu schematic
Switch on:
Hart Communicator
Self T est
in Progress
Firmware Rev: F2.2 Module Rev: 3.6
01992-96 FRSI
after approx. 20 s
Generic: D84 Online(Generic)
1 Device setup 2 P V 80.007 mbar 3 P V AO 17.594 mA 4 PV LRV 0.000 mbar 5 URV 100.000mbar
HELP SAVE
Set up the sensor in the sequence of the letters A, B, C and D (adjustment without medium). For the adjustment with medium you set up the sensor in the sequence A1, B1, C and D.
Generic: D84 Device setup
1 Process variables 2 Diag/Service 3 Basic setup 4 Detailed setup 5 Review
SAVE HOME
Generic: D84 PV
84.558 mbar
HELP EXIT
Generic: D84 AO1
17.518 mA
HELP EXIT
1
2
3
Generic: D84 Process variables
1 Snsr 84.293 mbar 2 AI % rnge 84.265 % 3 AO1 17.478 mA
HELP SAVE HOME
Generic: D84
1 PV LRV 0.000 mbar 2 URV 100.000 mbar
HELP HOME
Generic: D84
– WARNING –
Return control loop to automatic control
Generic: D84
– WARNING – Pressing „OK“ will change device output
Put loop in manual
ABORT OK
Generic: D84
1 PV LRV 0.000 mbar 2 URV 100.000 mbar
Setup
1.1
OK
HELP SEND HOME
4.1 (5.1)
4.2 (5.2)
Important and required menu windows
Less important menu windows
Not required, unimportant or blocked menu windows
Generic: D84
1 PV LRV 0.000 mbar 2 URV 100.000 mbar
HELP HOME
Generic: D84
1 PV LRV 0.000 mbar 2 URV 100.000 mbar
HELP HOME
continue like under 4
Generic: D84 PV LRV
AA
A
AA
4
BB
B
BB
5
0.000 mbar
0.000 mbar
HELP DEL ESC ENTER
Empty adjustment without medium
Generic: D84 PV URV
100.000 mbar
100.000
HELP DEL ESC ENTER
Full adjust­ment without medium
continue like under A figure 4.1(5.1)
28 Pressure transmitter D84
Setup
Generic: D84 PV
83.454 mbar
HELP EXIT
Generic: D84 PV % rnge
83.385 %
HELP EXIT
Generic: D84 AO1
17.327 mA
HELP EXIT
Generic: D84 Diag/Service
1 Test device 2 Loop test 3 Calibration 4 D/A trim
SAVE HOME
Generic: D84 Basic setup
1Tag 2 PV Unit 3 Range values 4 Device information 5 PV Xfer fnctn
HELP SAVE HOME
6 PV Damp
1.1.1
Safety enquiry acknowl­edgement
1.1.2
1.1.3
1.2
Blocked menu. The following menu window is indicated but not supported by the sensor. Therefore saving of adjustments carried out here is not possible.
1.3
T r ansmission function (linear)
Generic: D84 Choose analog output level
14 mA 2 20 mA 3 Other 4End
ABORT ENTER
Generic: D84 Calibration
1 Apply values 2 Enter values
HELP SAVE HOME
Generic: D84 Tag
DD
D
DD
CC
C
CC
BAR 20
BAR 20
HELP DEL ESC ENTER
Generic: D84 PV Snsr unit mbar
mbar g/cm2 kg/cm2 Pa
Generic. D84 Range values
1 PV LRV 0.000 mbar 2 URV 100.000 mbar 3 PV LSL 0.000 mbar 4 USL 100.000 mbar
HELP HOME
Generic: D84 Device information
1 Distributor 2 Model Generic 3 Dev id 11017815 4Tag D84 5 Date 10/01/97
HELP SAVE HOME
6 Write protect None 7 Description 8 Message 9 PV Snsr. s/n
Generic: D84 PV Damp
1.2.2 Input of individual current
values for test purposes (simulation of measured value)
1.2.3
ESC ENTER
Final asmbly num 0 Revision #’s
1.000 s
1 .000 s
A1A1
A1
A1A1 B1B1
B1
B1B1
1.3.1
1.3.2
1.3.3
1.3.4
1.3.6
Empty and full adjustment with medium
}
(see next page)
Newly assigned measurement loop designation to be saved with ENTER and SEND
see next
}
page
see next
}
page
HELP DEL ESC ENTER
Generic: D84 Review
Model
Generic
HELP PREV NEXT EXIT
Pressure transmitter D84 29
NAE CH VERL.
1.5
Generic: D84 Detailed setup
1 Sensors 2 Signal condition 3 Output condition 4 Device information
SAVE HOME
1.4
}
see next page
HART® menu schematic (continuation)
Generic: D84 Calibration
1 Apply values 2 Enter values
HELP SAVE HOME
Generic: D84 Range values
1 PV L RV 0.000mbar 2 PV URV 95.981mbar 3 PV LSL 0.000mbar 4 USL 100.000mbar
HELP HOME
Menu fields (broken line): repetition of previous page
1.2.3
1.2.3.1
Generic: D84 Enter values
HELP HOME
1.3.3
}
Safety enquiry acknowl­edgement
1 PV LRV 0.000 mbar 2 URV 100.000 mbar 3 PV USL 4 PV LSL 0.000 mbar
Indication of the sensor measuring range limits
Generic: D84 Set the:
14 mA 2 20 mA 3Exit
ABORTENTER
1.2.3.2 like display 4.1
like display 4.2
Indication of the
}
sensor measuring range limits
Generic: D84 PV LRV
0.000 mbar
0.000
HELP DEL ESC ENTER
Generic: D84 PV URV
100.000 mbar
100.000 mbar
1.2.3.1
A1A1
A1
A1A1
B1B1
B1
B1B1
1.3.3.1
1.3.3.2
Setup
Empty adjustment with medium
Generic: D84 Apply new 4 mA input
ABORT OK
Generic: D84 Apply new 20 mA input
Full adjustment with medium
ABBR. OK
Generic: D84 Device information
1 Distributor 2 Model Generic 3 Dev id 11017815 4Tag D84 5 Date 01/01/97
HELP SAVE HOME
6 Write protect None 7 Descriptor 8 Message 9 PV Snsr s/n
Final asmbly num 0 Revision #’s
Generic: D84 Detailed setup
1 Sensors 2 Signal condition 3 Output condition 4 Device information
SAVE HOME
like menu 1.3.4
1.3.4
Unknown Enumerator
General
(1.3.4.3) Indication of the sensor serial number
(1.3.4.4) Measurement loop designation as under menu window 1.3.1
(1.3.4.5) Date adjustment
None
individual text adjustment
individual text adjustment
Indication of the sensor serial number (as under menu window 1.3.4.3)
Generic: D84 Sensors
1.4
1 PV 97.214 mbar 2 PV Snsr unit mbar 3 Sensor information
HELP SAVE HOME
Generic: D84 Signal condition
1 Snsr Damp 1.000 s 2 URV 100.000 mbar 3 AI L R V 0.000 mbar 4 Xfer fnctn Linear 5 AI % rnge 97.101 %
HELP SAVE HOME
Generic: D84 Output condition
1 Analog output 2 HART output
HELP DEL ESC ENTER
SAVE HOME
1.4.1 Measured value
Modification of the unit
Info on lower and upper measur-
ing range limit as well as min. span (also the sensor characteris-
1.4.2
1.4.3
tics values)
Adjustment of the integration time
Adjustment of zero and span
Adjustment of zero and span
linear
Indication of the level in % of the adjusted span
30 Pressure transmitter D84
Setup
Generic: D84 Current applied process value: 97.112 mbar
1 Set as 4 mA value 2 Read new value 3 Leave as found
ABORTENTER
Generic: D84 Current applied prosess value :96. 262 mbar
1 Set as 20 mA value 2 Read new value 3 Leave as found
Generic: D84 Analog output
1 AO1 19.920 mA 2AO Alrm typ 3 Loop test 4 D/A trim 5 Scaled D/A trim
HELP SAVE HOME
1.2.3.1.1
ABORT ENTER
1.2.3.1.2
1.4.3.1
Generic: D84 Set the:
14 mA 2 20 mA 3 EXIT
Generic: D84 Set the:
14 mA 2 20 mA 3Exit
Generic: D84 AO Alrm typ Lo
Generic: D84 WARN - Loop should be removed from automatic control
Menu windows are displayed but not
}
supported by the sensor. Saving of adjustments carried out here is therefore not possible.
1.2.3.1.1.1
ABORT ENTER
ABORT ENTER
1.2.3.1.2.1
1.4.3.1.2
EXIT
1.4.3.1.3
ABORT OK
1.4.3.1.3
Generic: D84 Current applied process value: 96.549 mbar
1 Set as 4 mA value 2 Read new value 3 Leave as found
Generic: D84 Current applied process value: 95.703 mbar
1 Set as 20 mA value 2 Read new value 3 Leave as found
Generic: D84 Fld dev output is fixed at 4.000 mA
Generic: D84 Apply new 4 mA input
ABORT OK
Generic: D84 Apply new 20 mA input
ABORT OK
Low : In case of failure, current output
goes to 22 mA
High: In case of failure, current output
goes to < 3.6 mA
Generic: D84 Choose analog output level
14 mA 2 20 mA 3 Other 4End
ABORTENTER
ABORT ENTER
ABORT ENTER
1.4.3.1.3.1
ABBR. OK
1.4.3.2.3
ESC ENTER
1.4.3.2.4
Off On Not used None Unknown Special
Leave the Burst-mode in OFF position
Choice is not supported
Sensor signals measured values only on request Sensor signals measured values unrequested
Choice is not supported
Generic: D84 HART output
1 Poll addr 0 2 Num req preams 5 3 Burst mode Off 4 Burst option
HELP SAVE HO M E
1.4.3.2
Generic: D84 Burst mode Off
Off On Not Used None
Generic: D84 Burst option *********
PV % range/current Process vars/crnt
HELP ESC ENTER
Note:
After entering a parameter, push "
ENTER
" and then "
SEND
". Confirm the message to switch over to manual operation with "OK". Confirm the message to reset to automatic operation also with "OK". Only then will the adjustment be stored in the sensor and take effect.
Pressure transmitter D84 31
Setup

5.5 Adjustment with PC directly on the sensor

(electronics versions I, K and L)
For connection of the PC to the sensor, the interface converter VEGACONNECT 2 is required.
Connection of the PC to the sensor
Insert VEGACONNECT into the serial interface of the PC and insert the two-wire cable of VEGACONNECT into the CONNECT socket of the sensor.
Connection of the PC to the signal cable
Connect the two-wire cable of VEGACONNECT 2 to the signal cable leading to the sensor.
Connection configuration with pressure transmitter directly on active PLC
(electronics versions I, K and L)
• Two-wire technology, power supply from active PLC.
• Output signal 4 … 20 mA (passive).
• Adjustment with PC, HART® handheld or adjustment insert located in the sensor or in the external connection housing.
1)
2
4 ... 20 mA
2
VEGA­CONNECT 2
32 Pressure transmitter D84
2
1)
If the resistance of the processing system (PLC) connected to the 4 … 20 mA signal output is less than 200 Ω, a resistor of 250 Ω must be connected to the connection cable during adjustment.
The digital adjustment signal would be considerably damped or short-circuited through insufficient resistance of a connected processing system, and digital communication with the PC would not be ensured.
PLC
Ri < 250 Ω
Setup
If you have already connected the PC with the adjustment software VVO to your measur­ing system,
• first switch on the power supply of the connected sensor
• switch on the PC and start the adjustment software VVO.
• Choose with the arrow keys or the mouse the item " and click to "
You are asked for user identification.
PlanningPlanning
Planning
PlanningPlanning
OKOK
OK
".
OKOK
" on the entrance screen
The adjustment program (VVO), called in the following VVO, gets into contact with the connected sensor…
…and indicates after a few seconds if and with which sensor a connection exists.
The preset user identification can be modified later in the menu "
User access
".
• Enter under name "
• Also enter "
Pressure transmitter D84 33
VEGAVEGA
VEGA
VEGAVEGA
VEGAVEGA
VEGA
" under password.
VEGAVEGA
".
Note:
If you connect the adjustment software (VVO) to a sensor from which data has already been saved, you are asked if the saved data should be transferred to the sensor or if you want to transfer the sensor data to the database of VVO (the available data of the current sensor will be overwritten).
If you don’t get communication with the sen­sor, check the following:
- Is the sensor being supplied with sufficient voltage (min. 12 V)?
- When VEGACONNECT 2 is connected to the signal cable, is the load resistance 250 … 350 Ω?
Configuration
• Choose the menu "
system
", to get further information on the sensor type, the software version of the sensor, measuring unit, the measurement loop designation etc.
Configuration/Measuring
Setup
In the menu " you can give a name (e.g. vessel 10) and a description (e.g. cleaning detergent) to the measurement loop in place of the sensor number. This will make your entire measuring system more understandable.
• Now enter in this menu whether a level, a distance or a gauge should be measured.
Modify meas. loop configuration
"
• Click to "
• Click to the menu "
ment loop/Modifyment loop/Modify
ment loop/Modify
ment loop/Modifyment loop/Modify
sensor setup.
34 Pressure transmitter D84
QuitQuit
Quit
QuitQuit
".
Configuration/Measure-Configuration/Measure-
Configuration/Measure-
Configuration/Measure-Configuration/Measure-
". This is the first step of
• Confirm the adjustment with " saving you are again in the initial menu.
OKOK
OK
" and after
OKOK
Setup
Parameter adjustment/Adjustment
In the menu "
adjustment
sor adjustments.
• Choose the menu "
eter adjustment
Instrument data/Parameter
" you carry out all important sen-
Instrument data/Param-
".
• Choose in the menu window "
data parameter adjustment
AdjustmentAdjustment
"
Adjustment
AdjustmentAdjustment
• In the menu window "
Min/Max-adjustmentMin/Max-adjustment
to "
Min/Max-adjustment
Min/Max-adjustmentMin/Max-adjustment
You can carry out the min./max. adjustment with or without medium. Generally you will carry out the adjustment without medium.
".
Adjustment
Instrument
" the menu item
" you click
" (zero/span).
The adjustment can be quickly and conven­iently carried out without medium, as shown in the example.
• Choose in which unit you want to carry out the adjustment.
• Enter the pressures corresponding in your
• Confirm the warning with "
In the heading you now see the previously entered measurement loop name and the measurement loop description.
Pressure transmitter D84 35
OKOK
OK
OKOK
".
application to 0 % and 100 % and push
OKOK
"
OK
".
OKOK
Setup
The example shows an absolute pressure transmitter with a measuring range of 0 … 1000 mbar, with which low pressures (partial vacuum) are measured. The min. value was set to 50 mbar and the max. value (span) to 1000 mbar (i.e. the final value of the measuring range).
QuitQuit
Quit
QuitQuit
OKOK
OK
" and
OKOK
" and you
• Confirm your adjustments with " after a short data transmission to the sensor, you are again in the menu window "
Adjustment
• Quit all menu windows with " are again in the initial menu.
Offset correction (not possible with abso­lute pressure transmitters)
With this menu you can carry out a zero point correction/position correction (unpressurized sensor).
".
• Click to "
• When the sensor is unpressurised and in installation position, confirm the safety enquiry with "
You see the actual measured value from the sensor.
• Click to "
Offset correctionOffset correction
Offset correction
Offset correctionOffset correction
OKOK
OK
".
OKOK
CorrectCorrect
Correct
".
CorrectCorrect
".
• Choose in the initial menu "
Parameter adjustment functionsfunctions
functions
functionsfunctions
36 Pressure transmitter D84
".
Instrument data/
" the item "
AdditionalAdditional
Additional
AdditionalAdditional
Setup
Again choose the menu " and you see the corrected zero value.
Note: The menu item " bles the correction of the actual pressure by means of a reference value. This corrects the measuring characteristics in a way similar to the offset correction.
Real value correction
Offset correction
" ena-
"
Conditioning/Linearisation
In the menu "
adjustment/Conditioning/Linearisation
allocated a filling quantity (volume) to the level (filling height). The correlation between level and volume is described with so-called linearisation curves.
• Click to "
mentment
ment
mentment
LinearisationLinearisation
"
Linearisation
LinearisationLinearisation
Instrument data/Parameter
" you
Instrument data/Parameter adjust-Instrument data/Parameter adjust-
Instrument data/Parameter adjust-
Instrument data/Parameter adjust-Instrument data/Parameter adjust-
", then to "
ConditioningConditioning
Conditioning
ConditioningConditioning
".
" and finally to
You can choose four linearisation curves: linear, horiz. cylindrical tank, spherical tank and user programmable curve.
Under "
User programmable curve
enter your own linearisation curve as a corre­lation between the level in % or pressure in % (percentage value) and the volume (linearised).
• Choose " then "
User programmable curveUser programmable curve
User programmable curve
User programmable curveUser programmable curve
EditEdit
Edit
".
EditEdit
" you can
" and
First of all, a linear correlation is displayed (the function is a straight line).
Pressure transmitter D84 37
Setup
In the field "
Transfer measured value
" the current pressure as a percentage of the adjusted span is displayed. The measuring span has already been adjusted with the min./max adjustment. In our example this is in the range between 50 … 1000 mbar.
The user-programmable linearisation curve is generated by index markers, consisting of the value pairs " the selected unit) and "
Linearised
Percentage value
" (volume in % or in
"
(level or filling height in %).
Defining the linearisation curve by incre­mental filling
In the characteristics of the example (evacu­ated vessel), you see four index markers or value pairs. There is always a linear interpola­tion between the index markers.
• Click in the check box "
ues
", to have the selected unit of measure-
Show scaled val-
ment displayed on the y-axis (left bottom part in the menu window).
Index marker 1 is at 0 % level or pressure (percentage value [%]), corresponding to an actual pressure of 0 mbar.
1000 mbar = 100 liters
700 mbar = 35 liters
300 mbar = 5 liters
0 mbar = 0 liters
Pressure transmitter
Vacuum
Saline solution
Max. 32 index markers (value pairs) can be entered.
• Quit the menu with "
• Confirm the message with "
OKOK
OK
OKOK
".
OKOK
OK
" and your
OKOK
individual linearisation curve will be saved in the sensor.
Again in the menu window "
Conditioning
" you can enter a measured value integration with the menu item "
Integration time
". This is useful for fluctuating product surfaces to smooth the display and output of measured values. As a standard feature, the integration time is preset to 0 seconds.
Index marker 2 is at 30 % level or pressure and 5 % filling volume.
Index marker 3 is at 70 % level or pressure
• Quit the menu with "
You are again in the menu window "
ment data parameter adjustment
OKOK
OK
OKOK
".
Instru-
".
and 35 % filling volume.
Index marker 4 is at 100 % level or pressure and 100 % filling volume (100 litres).
38 Pressure transmitter D84
Setup
Meas. data information
• Click to "
All available sensor information is displayed. With the button " pressure and temperature history saved in the sensor.
Meas. data info
reset
" you can delete the
".
Backup
In the menu window " its serial number is displayed. You can save the sensor data in the PC individually or in groups with all adjustments in a directory of your choice. A small text message can be added to each backup.
Backup
" the sensor with
Saved sensor data can be transferred later on to other sensors.
For example, if you have a system with sev­eral of the same storage vessels and identical sensors, it is sufficient to configure one sensor and then transfer the settings to the other sensors.
In this menu window, the actual setting (data base) with date and time of the last system configuration is displayed in the yellow win­dow field. If you click on the serial number of the sensor from which you want to adopt the adjustments (in the yellow field), these sensor settings will be transferred to the currently connected sensor with "
Restore to
".
Pressure transmitter D84 39

6 Diagnostics

Diagnostics
Maintenance
The pressure transmitter D84 is maintenance free.
Should dismounting of the pressure transmit­ter (e.g. for vessel cleaning) be necessary, we recommend the use of new seals. Use only original seals from VEGA.
Remedying faults
Through continuous self-monitoring, series 80 pressure transmitters offer maximum reliability. However, if faults occur, please check the following before removing the pressure transmitter:
- the atmospheric pressure compensation (only with gauge pressure measuring ranges),
- the electrical connections.
Checking atmospheric pressure compen­sation
First of all, open the cover of the housing in which the atmospheric breather facility 1) is located. The displayed measured value must not change. If, however, the displayed value changes, the compensation of the atmos­pheric pressure does not function correctly and the measured value will be distorted. Therefore check:
- the breather facility on the housing
- the external connection housing VEGADIS 12
- the capillaries in the special housing.
Note:
The same atmospheric pressure must be acting on the breather facility and the open vessel.
Checking electrical connections
Pressure transmitter terminals
1 2 3
mA
Current
Voltage
V
Current
mA
External energy source
-
~
+
Checking the voltage
- The terminal voltage on the pressure trans­mitter must be at least 12 V DC.
- The terminal voltage on VEGADIS 12 must be at least 12 V DC or 17 V DC (with dis­play).
- The supply voltage for the pressure trans­mitter through a VEGAMET signal condi­tioning instrument must be approx. 18 V DC (on VBUS 25 V DC).
Checking the current
These values are only valid for pressure transmitters with analogue signal transmis­sion, not for pressure transmitters with digital output signal (VBUS).
• Initial current with uncovered diaphragm of the pressure transmitter: approx. 4 mA (5 mA when operated on a VEGA signal conditioning instrument)
• Measuring current during operation: 4 … 20 mA (5 … 19 mA when operated on a VEGA signal conditioning instrument)
• Exceeding or falling short of the specified measuring range: 20.5 mA or 3.8 mA
• Pressure transmitter defective or short­circuit: current 22 mA or 3.6 mA
1)
It consists of a black plastic screwed insert with integrated filter element.
40 Pressure transmitter D84
Instrument modification

7 Instrument modification

7.1 Retrofitting the adjustment insert

Such a retrofitting can be necessary, e.g. when a pressure transmitter with factory settings must be adapted to changed meas­urement conditions.
Note the following retrofit procedure:
• remove the outdated terminal insert
• mount new adjustment insert
• set up pressure transmitter acc. to chapter "5 Setup"
Remove the outdated terminal insert
1 Separate pressure transmitter from
power supply.
2 Unscrew cover of the connection housing
or loosen the screws on the cover of the
external housing. 3 Remove cover. 4 Loosen connection cables on the terminal
insert. 5 Loosen the three screws of the terminal
insert. 6 Remove terminal insert and pull out plug
connection (to do this, bend locking nose
carefully towards housing centre).
Mount new adjustment insert
7 Plug the connection into the adjustment
insert (must snap in). 8 Place adjustment insert in the housing
and fasten with three screws. 9 Connect the connection cables to the
terminals. 10 Fasten the cover. 11 Reconnect the pressure transmitter to
power supply.
Setup of pressure transmitter
see chapter "5 Setup".

7.2 Exchange of hygienic form seal on D84

On the hygienic connections AA, CA, LA, LB, RA, RB, TA of pressure transmitter D84, the ceramic measuring cell is radially, gaplessly sealed with a form seal. This form seal (mate­rial EPDM-FDA) can be exchanged by the user without the need of a fresh adjustment. The criteria and the time intervals for such an exchange of the seal are generally defined by the process and hygienic requirements.
Important:
Use only original replacement seals from VEGA!
Please note the following exchange proce­dure.
Removal procedure:
• Pressure transmitter should be unpressu-
rized (switch off process pressure or empty vessel).
• Loosen the hexagon pressure screw (4)
(width across flats, 46 mm) by turning to the left.
Note!
The process connection (6) (e.g. compres­sion nut) must not be loosened!
• Turn the adapter (3) below the pressure
transmitter housing with a wrench (with across flats, 36 mm) briefly to the left (to loosen the seal).
• Pull the complete pressure transmitter on
the housing (1) out of the process connec­tion by carefully turning to the left.
• Slightly lift the form seal (5) and loosen
from the ceramic measuring cell.
• If the form seal (5) does not completely
encircle the measuring cell, it must be carefully removed from the process connection.
Pressure transmitter D84 41
Installation procedure:
• Place the new form seal (5) over the meas­uring cell (the conical end must point to the process connection!).
• Carefully insert pressure transmitter into the process connection by turning clock­wise.
• Tighten hexagon pressure screw (4) (width across flats, 46 mm) (45 Nm).
• Turn the housing (1) of the pressure transmitter to the original position.
The exchange of the form seal is now fin­ished; the removed seal must be properly disposed of.
1
2 3
4
Instrument modification
5
6
1 Pressure transmitter 2 Headless screw (prevents overwinding and must not be
removed) 3 Adapter 4 Hexagon screw 5 Form seal 6 Process connection
42 Pressure transmitter D84
Notes
Pressure transmitter D84 43
VEGA Grieshaber KG Am Hohenstein 113 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
All statements concerning scope of delivery, application, practical 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
24981-EN-021217
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