Vega Vegadif 44, Vegadif 51, Vegadif 35, Vegadif 34, Vegadif 45 Operating Instructions
Operating Instructions
VEGADIF 34 … 51
Level and Pressure
p
Contents
Safety information ......................................................................... 3
Note Ex-area ................................................................................ 3
1 Product description
1.1 Function and configuration ................................................... 4
1.2 Types and versions .............................................................. 5
1.3 Type plate ............................................................................. 7
1.4 Technical data ....................................................................... 8
1.5 Dimensions ......................................................................... 15
1.6 Approvals ........................................................................... 20
2 Mounting
2.1 Verifying operating conditions ........................................... 21
2.2 Pre-installation ..................................................................... 22
2.3 Mounting .............................................................................. 24
3 Electrical connection
3.1 Connection instructions ...................................................... 28
3.2 Load resistance .................................................................. 28
3.3 Connections ........................................................................ 29
3.4 Ex-applications ................................................................... 30
Contents
4 Setup
4.1 Adjustment structure .......................................................... 32
4.2 Adjustment with 4-key adjustment element ....................... 32
4.3 Adjustment with HART® handheld ...................................... 38
4.4 Adjustment with PC ............................................................ 46
2 VEGADIF 34 … 51
Contents
5 Typical installation connections
5.1 Valves .................................................................................. 53
5.2 Impulse lines ....................................................................... 54
5.3 Differential pressure measurement ................................... 55
5.4 Level measurement ............................................................ 57
5.5 Flow measurement ............................................................. 65
6 Diagnostics
6.1 Failure codes ...................................................................... 69
7 Instrument modification ......................................................... 70
Safety information
The described module must only be installed
and operated as described in these operating
instructions. Please note that other action can
cause damage for which VEGA does not take
responsibility.
VEGADIF 34 … 51 3
Note Ex-area
Please note the approval documents (yellow
binder), and especially the included safety data
sheet.
1 Product description
Product description
1.1 Function and configuration
Function
VEGADIF 34 … 51 differential pressure transmitters are an efficient, modular instrument
series for differential pressure, level and flow
measurement.
The sensor element of VEGADIF 34 and 44 is
a single-chamber ceramic measuring cell. It
consists of a disk-shaped ceramic body with
ceramic diaphragms on both sides. According to the pressure the diaphragms move and
the capacitances change. The difference of
the individual capacitances is reciprocally
proportional to the difference of the pressures.
The sensor element of VEGADIF 35, 45 and 51
is a silicium plate with pressure sensitive resistors. The differential pressure to be measured is received via separating diaphragms
and transmitted to the sensor element via
incompressible oil (silicone oil or inert oil). The
silicium plate moves according to the differential pressure. The values of the resistors
change (piezoresistive principle).
The capacitance or resistance values are
detected by the integral electronics and converted into a 4 … 20 mA output signal. This
output signal is proportional to the difference
of the pressures. Precise digital processing of
measured data with maximum resolution ensures excellent technical performance.
The external power supply is provided via a
separate supply instrument, e.g.:
- power supply instrument
(e.g. VEGASTAB 690)
- processing unit with integral direct voltage
source (e.g. active DCS-input)
- VEGAMET series 500 or 600 signal conditioning instrument, VEGALOG 571 processing system or VEGADIS 371 indicating
instrument
Configuration
Each VEGADIF consists of only two modular
components:
- the electronics housing
- the measuring cell housing.
Sensor specific data are permanently stored
in an ASIC in the sensor. Hence the measuring
cell modules can be changed, e.g. ceramic for
silicium and vice versa. The electronics can be
changed, e.g. from 4 … 20 mA standard to
4 … 20 mA with HART®-communication protocol, without dismounting the transmitter.
The electronics in the pressure transmitter
requires a supply voltage of 11.5 … 45 V DC.
4 VEGADIF 34 … 51
Product description
1.2 T ypes and versions
VEGADIF 34
Measuring cell:
ceramic-capacitive
Process connection:
acc. to DIN 19 213
Standard application:
Differential pressure and flow measurement
with gases, vapours and liquids
VEGADIF 35
Measuring cell:
silicium-piezoresistive with metal separating
diaphragms
Process connection:
acc. to DIN 19 213
VEGADIF 34
Standard application:
Differential pressure and flow measurement
with gases, vapours and liquids, with differential pressure up to 40 bar and static pressures up to 420 bar
VEGADIF 35
VEGADIF 44
Measuring cell:
ceramic-capacitive
Process connection:
Plus side flange,
minus side acc. to DIN 19 213
Standard application:
Level measurement in pressurized vessels,
even with suspended solids, abrasive or high
viscosity products
VEGADIF 34 … 51 5
VEGADIF 44
VEGADIF 45
Measuring cell:
silicium-piezoresistive with metal separating
diaphragm
Process connection:
Plus side flange,
minus side acc. to DIN 19 213
Standard application:
Level measurement in pressurized vessels,
even with product temperatures up to 400°C
VEGADIF 51
Measuring cell:
silicium-piezoresistive with metal separating
diaphragms
Product description
VEGADIF 45
Process connection:
Cell isolating diaphragm in standard series,
connected via capillary lines
Standard application:
Level, differential pressure and flow measurement especially with high-viscosity products,
high temperatures and in food processing
industries
For applications in hazardous areas as well as
overfill protection acc. to WHG certified instruments are available
6 VEGADIF 34 … 51
VEGADIF 51
Product description
1.3 T ype plate
Check before mounting and electrical connection that you are using a suitable differential
pressure transmitter. Observe type and calibration plate which are located as follows:
Calibration plate
Both plates include important data required for
mounting and connection. The configuration
and contents of the plates are explained in the
following example.
Type plate
Product coding example
type DIF35AC4E1VH3C
Process connection flange
1.4435
Measuring cell seal PTFE
2 ventilation valves,
1 mounting loop
Nominal value calibration
in mbar/bar
Nom. meas. range 160 mbar,
static pressure max. 140 bar
LC-indication top
Cable entry Pg 13.5
Configuration of the calibration plate
(example)
Cal.
Adj. 0 … 160 MBAR
Calibration range 0 … 160 mbar
Configuration of the type plate (example)
1
2
Order Code
Ser.-No.
p
Pmax
4…20mA U
Mat.
1 Basic data of the order no.
2 Serial number
VEGADIF 34 … 51 7
DIF35 AC4E1 VH 3C
10612892
-160 … 160 mbar
140 bar
1.4571 PTFE
VEGA VEGADIF
Made in
Germany
11,5 … 45 V DC
Product description
1.4 T echnical data
Mechanical data
Materials, wetted parts
VEGADIF 34
- Diaphragm Aluminiumoxideceramic (Al2O3)
- Process seal FPM, Hastelloy C4 PTFE-plated, EPDM,
- Process connection carbon steel C22.8 chromized 1.0460,
- Ventilation valves stainless steel 1.4571 or 1.4404, Hastelloy C276
VEGADIF 35
- Separating diaphragms stainless steel 1.4401
- Process seal FPM, NBR, PTFE, FPM for oxygen
- Process connection carbon steel C22.8 chromized 1.0460
- Ventilation valves stainless steel 1.4571 or 1.4404, Hastelloy C276
VEGADIF 44
- Diaphragm Aluminiumoxideceramic (Al2O3)
- Process seal FPM, Hastelloy C-4 PTFE-plated, EPDM,
- Process connection (plus side) carbon steel C22.8 chromized 1.0460,
- Process connection (minus side) carbon steel C22.8 chromized 1.0460,
FPM for oxygen application, Kalrez
stainless steel 1.4571 or 1.4404, Hastelloy C276
2.4819, PVDF (PN 10)
2.4819 (only with process connection Hastelloy)
applications
stainless steel 1.4571 or 1.4404, Hastelloy C276
2.4819
2.4819 (only with process connection Hastelloy)
FPM for oxygen application, Kalrez
stainless steel 1.4571, stainless steel 1.4571
PTFE coated
Hastelloy C276 2.4819
stainless steel 1.4571 or 1.4404, Hastelloy C276
2.4819
VEGADIF 45
- Isolating diaphragm stainless steel 1.4435
- Process flange (plus side) stainless steel 1.4435
- Process flange (minus side) carbon steel C22.8 chromized 1.0460,
VEGADIF 51
- Isolating diaphragm stainless steel 1.4435
- Process connection carbon steel C22.8 chromized 1.0460,
8 VEGADIF 34 … 51
stainless steel 1.4571 or 1.4404, Hastelloy C276
2.4819
stainless steel 1.4571 or 1.4404, Hastelloy C276
2.4819
Product description
Materials, non-wetted parts
Common components
- Electronics housing and cover Al-casting (Cu-free), protective coating
Polyester based, colour yellow RAL 1018,
black RAL … (cover)
- Type plates stainless steel 1.4301
- O-rings for cover seal NBR
- Screws and nuts
for measuring cell housing or
process connection carbon steel C22.8
- Mounting loop corresponding to process connection
carbon steel C22.8, stainless steel 1.4571
1)
VEGADIF 34
- Fill fluid of the measuring cell silicone oil, mineral oil, Voltalef 1 A
VEGADIF 35
- Measuring cell housing stainless steel 1.4571
- Fill fluid of the measuring cell silicone oil, Fluorlube
2)
VEGADIF 44
- Fill fluid of the measuring cell silicone oil, mineral oil, Voltalef 1 A
VEGADIF 45 and VEGADIF 51
- Measuring cell housing stainless steel 1.4571
- Fill fluid of the measuring cell silicone oil, vegetable oil, glycerine, high
temperature oil, oil for oxygen applications
- Capillary line stainless steel 1.4571
- Fill fluid of the measuring cell silicone oil, Fluorlube
2)
Weights
VEGADIF 34 approx. 5 kg
VEGADIF 35 4 … 6 kg, depending on version
VEGADIF 44 8 … 10.5 kg, depending on flange size
VEGADIF 45 6 … 12 kg, depending on flange size and
extension length
VEGADIF 51 4 kg plus capillaries and flange isolating
diaphragm
Isolating diaphragm see tables in "1.5 Dimensions - Isolating
diaphragm"
2)
2)
1)
Sea water resistance (salt spray test acc. to DIN 50 021 passed for 504 h)
2)
for applications in pure gases
VEGADIF 34 … 51 9
Electrical data
Product description
Connection
Cable entry Pg 13.5 (for cable-ø 9 … 12 mm)
1)
Screw terminals for conductor cross-sections up to 2.5 mm
Earth terminal for conductor cross-sections up to 4 mm
Supply and signal circuit (4 … 20 mA-signal)
Supply voltage
- not Ex-instruments 11.5 … 45 V DC
- Ex-instruments 11.5 … 30 V DC
Residual ripple no influence at USS £ 4.5 V
Output signal 4 … 20 mA linear (differential pressure proportio
nal) or square root (flow proportional changeable)
Resolution better than 6 µA
Current limitation approx. 23 mA
Measuring range decrease 2.8 mA (standard) or 4 mA
Measuring range exceed 20.5 mA acc. to NAMUR
Fault signal (adjustable) 3.6 mA, 21.5 mA, current value
Integration time
2)
0 … 16 s with keys on the instrument
0 … 40 s with HART® handheld
Adjustment period 0.5 … 2.0 s depending on measuring range
Raising time 0.4 … 1.6 s depending on measuring range
Heating time 2 s
Connection line 2-wire
Max. permissible load depending on supply voltage
1560
1000
in Ohm
R total
500
Load
0
20 28,5 37 4511,5
Voltage of the external energy UH in Volts
Supply and signal circuit (digital communication signal HART®)
Connection line 2-wire (the communication must not be influenced
by unshielded cables)
Line resistance £ 25 W/km
Total resistance higher than 250 W (communication resistance of
min. 250 W required)
Total capacitance smaller than 180 nF
Max. length 1000 m
2
2
1)
with smaller cable diameter a suitable seal must be provided by the customer
2)
adjustment time of 10 % … 63 % of the measuring range final value
10 VEGADIF 34 … 51
Product description
Protective measures
Protection IP 65
IP 68 (option for VEGADIF 35, 45 and 51)
Protection class III
CE-protective measures
VEGADIF 34, VEGADIF 35, VEGADIF 44, VEGADIF 45 and VEGADIF 51 differential pressure
transmitters meet the protective regulations of EMC (89/336/EWG) and NSR (73/23/EWG).
The conformity has been judged acc. to the following standards:
EMC Emission EN 50 081 - 1
Susceptibility EN 50 082 - 2
NSR EN 61 010
NAMUR-regulations
Full compliance with the NAMUR-regulations NE21, May 1993.
Transmission reaction
Measuring ranges
VEGADIF 34 and VEGADIF 44
Features Limits Span System pressure Pressure transmission
Nom. liquid
meas. Initial Final value minimum maximum Overload Overload in the sensor
ranges value unilateral bilateral
25 mbar -25 mbar 25 mbar 5 mbar 25 mbar 10 bar 10 bar silicone oil
100 mbar -100 mbar 100 mbar 5 mbar 100 mbar 16 bar 2)25 bar 2)silicone oil
500 mbar -500 mbar 500 mbar 25 mbar 500 mbar 100 bar 2)140 bar 2)mineral oil
3000 mbar -3000 mbar 3000 mbar 150 mbar 3000 mbar 100 bar 2)140 bar 2)mineral oil
1)
1)
1)
1)
VEGADIF 35, VEGADIF 45 and VEGADIF 51
Features Limits Span System pressure Pressure transmission
Nom. liquid
meas. Initial Final value minimum maximum Overload Overload in the sensor
ranges value unilateral bilateral
3)
10 mbar
40 mbar
160 mbar -160 mbar 160 mbar 10 mbar 160 mbar 140 bar 140 bar silicone oil
1000 mbar -1000 mbar 1000 mbar 50 mbar 1000 mbar 420 bar 4)420 bar 4)silicone oil
6000 mbar -6000 mbar 6000 mbar 300 mbar 6000 mbar 420 bar 4)420 bar 4)silicone oil
40000 mbar3)-40000 mbar 40000 mbar 2000 mbar 40000 mbar 100 bar 420 bar 4)silicone oil
-10 mbar 10 mbar 2 mbar 10 mbar 140 bar 140 bar s ilicone oil
3)
-40 mbar 40 mbar 5 mbar 40 mbar 140 bar 140 bar s ilicone oil
1)
1)
1)
1)
1)
1)
Minimum pressure
VEGADIF 34, 35 and 44 1 mbar
VEGADIF 45 and 51 10 mbar
1)
in applications with pure gases Voltalef 1 A
2)
10 bar with process connection PVDF for VEGADIF 34; 40 bar with process flange for VEGADIF 44
3)
only VEGADIF 35
4)
note nominal pressure of the flanges
VEGADIF 34 … 51 11
abs
abs
Product description
Output characteristics
Determination of characteristics fixed point method acc. to VDI/VDE 2600, sheet 4
(corresponds to the limit point adjustment acc. to
DIN 16 086)
Characteristics linear (differential pressure proportional),
changeable to square root (flow proportional)
Accuracy data
1)
Feature Accuracy
2)
Hysteresis Repeatability
Instrument
VEGADIF 34 better than 0.1 % better than 0.05 % better than 0.05 %
VEGADIF 35 better than 0.1 % better than 0.1 % better than 0.1 %
VEGADIF 44 better than 0.1 % better than 0.05 % better than 0.05 %
VEGADIF 45 better than 0.2 % better than 0.1 % better than 0.1 %
VEGADIF 51 better than 0.2 % better than 0.1 % better than 0.1 %
Long-term stability of the zero signal
3)
better than 0.1%/12 months (VEGADIF 34 and 44)
better than 0.2%/12 months (VEGADIF 35, 45, 51)
Influence of other actuating variables
Influence of the static pressure
to zero and span better than 0.2 %/PN (VEGADIF 34 and 44)
better than 0.2 %/100 bar (VEGADIF 35, 45, 51)
Electromagnetic compatibility (EMC) interference immunity to NAMUR: 30 V/m
Influence of vibration
5) 6)
better than ±0.1 % acc. to DIN/IEC 68, part 2 - 6
Climatic class GPC acc. to DIN 40 040
Calibration position upright
Influence of the mounting position max. 2 mbar
Temperature influence
Average temperature influence of the
zero signal
3) 4)
or the output span better than 0.02 %/10 K (+10 … +60°C)
better than 0.1 %/10 K (-40 … + 10°C a.
60°C…85°C)
1)
Similar to DIN 16 086
2)
relating to the nominal measuring range with recommended turn-down limit of 20 : 1
3)
relating to the nominal measuring range, reference temperature 25°C, with recommended turn-down limit of
20 : 1
4)
with VEGADIF 45 and 51 without isolating diaphragm or capillaries, see temperature influence
5)
relating to the nominal measuring range
6)
with silicium measuring cell measured on 6000 mbar sensor
12 VEGADIF 34 … 51
Product description
Additional temperature influence 1) with VEGADIF 45:
- by isolating diaphragm
Process connection effective Temperature coefficient
diaphragm-ø [mbar/10 K]
Flange DN 50 PN 40 acc. to DIN 2501,
Seal surface acc. to DIN 2526 form D 46 mm 5.0
Flange DN 80 PN 40 acc. to DIN 2501,
Seal surface acc. to DIN 2526 form D 70 mm 3.0
Flange DN 80 PN 40 with extension 50 mm 70 mm 3.0
Flange DN 80 PN 40 with extension 100 mm 70 mm 3.0
Flange DN 80 PN 40 with extension 150 mm 70 mm 3.0
Flange DN 80 PN 40 with extension 200 mm 70 mm 3.0
Additional temperature influence
1)
with VEGADIF 45:
- by isolating diaphragm
Isolating diaphragm series effective Temperature coefficient
diaphragm-ø [mbar/10 K]
unilateral bilateral
Cell DN 50 PN 16/400 46 mm 3.0 0.5
Cell DN 80 PN 16/400 70 mm 0.7 0.1
Cell DN 100 PN 16/400 70 mm 0.7 0.1
Cell 3" class 150/2000 2
3
/4" 0.7 0.1
Cell 4" class 150/2000 23/4" 0.7 0.1
DIN 11 851, nut DN 50 PN 25 46 mm 3.0 0.5
DIN 11 851, nut DN 65 PN 25 52 mm 1.0 0.2
DIN 11 851, nut DN 80 PN 25 71.5 mm 0.7 0.1
DIN 11 851, socket DN 50 PN 25 46 mm 3.0 0.5
DIN 11 851, socket DN 65 PN 25 52 mm 1.0 0.2
DIN 11 851, socket DN 80 PN 25 71.5 mm 0.7 0.1
Clamp 2" PN 25 45 mm 3.0 0.5
Clamp 3" PN 25 71.5 mm 0.7 0.1
DRD-flange DN 25 46 mm 1 .5 0.25
- by capillary line 2) per m 0.5 mbar/10 K (unilateral)
0.12 mbar/10 K (bilateral)
Operating conditions
Product features
Aggregate gaseous, vapour, liquid to high viscosity
Condition also abrasive or aggressive with suitable
1)
standard values relating to isolating liquid silicone oil
2)
both capillary lines are supplied with the same length
VEGADIF 34 … 51 13
material selection of wetted parts acc. to
order code
Product description
Temperatures
Ambient temperature -40°C … +85°C (for indication: -20°C … +85°C)
Medium temperature
- VEGADIF 34 and VEGADIF 44
FPM (Viton, Fluor-caoutchouc) -20°C … +85°C
PTFE (Hastelloy C4, from p
EPDM -40°C … +85°C
³ 900 mbar) -40°C … +85°C
abs
FPM (Viton for oxygen, oil and grease free) -10°C … +85°C
Kalrez -10°C … +85°C
- VEGADIF 35 and minus side VEGADIF 45
FDM (Viton, Fluor-caoutchouc) -20°C … +85°C
NBR -20°C … +85°C
PTFE, from p
FPM (Viton for oxygen, oil and grease free) -10°C … +85°C
³ 1 mbar -40°C … +85°C
abs
- Plus side VEGADIF 45 and VEGADIF 51
Isolating liquid: p
- silicone oil -40°C … +200°C / -40°C … +180°C
³ 1 bar / 0.05 bar £ p
abs
- vegetable oil -10°C … +200°C / -10°C … +120°C
- glycerine +15°C … +200°C / – ––
- high temperature oil -10°C … +350°C / -10°C … +200°C
- oil for oxygen application -40°C … +175°C / -40°C … +80°C
Storage and transport temperature -40°C … +100°C (VEGADIF 34 and 44)
-50°C … +100°C (VEGADIF 35, 45 and 51)
Ex-technical data CENELEC
General data
Classification mark EEx ia IIC T4/T6
Intrinsically safe supply and signal circuit
Classification EEx ia IIC
Only for connection to certified, intrinsically
safe circuits with the max. values:
- voltage UO = 30 V
- current IK = 300 mA
- efficiency P = 1 W
Inner effective capacitance C
Inner effective inductance L
Ambient conditions
Ambient temperature around the
oscillator
- temperature class T6 -40°C … +40°C
- temperature class T5 -40°C … +55°C
- temperature class T4 -40°C … +85°C
= 11.2 nF
int
= 0.2 mH
int
1)
abs
< 1 bar
1)
at p
< 1 bar (vacuum range) the isolating liquid boils already at lower temperatures
abs
14 VEGADIF 34 … 51
Product description
0-500 mbar
2 5 0
39
Z S
1.5 Dimensions
VEGADIF 34
104
x
81
104
80
View x
150
136
255
41,3
255
41,3
with PVDF-flange
VEGADIF 35
y
M10
7
/16 - 20 UNF
1
/4" - 18 NPT
54
82
M10
7
/16 - 20 UNF
54
82
96
96
Mounting loop
(optional)
PVDF
1
/4" - 18 NPT
View y
235
41,3
85 (93)
54
85
100 (135)
The values in brackets relate to PN 420
VEGADIF 34 … 51 15
M10 (M12)
7
/16 - 20 UNF
1
/4" - 18 NPT
106 (110)
VEGADIF 44
;
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DIN-flange DN 80/DN 100 ANSI-flange 3"
Product description
M10
7
/16 - 20 UNF
1
/4" - 18 NPT
VEGADIF 45
M10
7
/16 - 20 UNF
1
/4" - 18 NPT
M10
7
/16 - 20 UNF
1
/4" - 18 NPT
A = Installation height
D = Outer flange diameter
b = Flange thickness
k = Diameter of hole circle
d2= Diameter of hole
d4= Seal ledge diameter
d5= Extension diameter
RL= Extension length
dM= Diaphragm diameter
d
2
d
M
d
4
d
5
L
R
16 VEGADIF 34 … 51
Product description
Flange connection acc. to DIN 2501, seal ledge acc. to DIN 2526 form D
Order Flange Holes Seal ledge Dia. Extension Install.
code Size/Nominal pressure D b k No. d2d
dMR
4
d5dMheight A
L
B DN 50 / PN 40 165 20 125 4 18 102 46 –– –– –– 360
C DN 80 / PN 40 200 24 160 8 22 138 70 –– –– – – 360
D DN 80 / PN 40 200 24 160 8 22 138 –– 50 76.5 70 360
E DN 80 / PN 40 200 24 160 8 22 138 –– 100 76.5 70 360
F DN 80 / PN 40 200 24 160 8 22 138 –– 200 76.5 70 360
G DN 100 / PN 40 235 26 190 8 26 162 70 –– 76.5 70 360
Flange connection acc. to ANSI B 16.5
Order Flange Holes Seal ledge Dia. Extension Install.
code Size/Nominal press. D b k No. d
in lb/sq in in/mm in/mm in/mm in/mm in/mm in/mm in/mm in/mm in/mm A
3
P 2 / 150 6/152
/4 /43/4/43/4/35/8/13/4/ –– –– –– 14.2/
19.5 120.7 20 92 46 360
15
R 3 / 150 8.25/
/16 /6/ 43/4/5 /23/4/ –– –– –– 14.2/
191 24 152.4 20 127 70 360
15
S 3 / 150 8.25/
/16 /6/ 43/4/5/–– 2/ 3/23/4/ 14.2/
191 24 152.4 20 127 50.8 76.5 70 360
15
T 3 / 150 8.25/
/16 /6/ 43/4/5/–– 4/ 3/23/4/ 14.2/
191 24 152.4 20 127 101.6 76.5 70 360
15
U 3 / 150 8.25/
/16 /6/ 43/4/5/–– 8/ 3/23/4/ 14.2/
191 24 152.4 20 127 203.2 76.5 70 360
1
W 4 / 300 10/ 1
/2 /78/9/814/16/62/9/23/4/ –– –– –– 14.2/
254 32 200.1 23 158 70 360
d4d
2
R
M
d5d
L
height
M
VEGADIF 34 … 51 17
;
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VEGADIF 51
;
7
/16 - 20 UNF
1
/4" -
18 NPT
Isolating diaphragm as cell version, AA … CR
Product description
d
M
acc. to DIN 2501
Order Socket Cell Min. mounting Max. Weight
code Size/Nominal pressure D b d
distance A pressure approx.
M
AA DN 50 PN 16 102 20 46 130 400 bar 2.6 kg
AK DN 80 PN 16 138 20 70 130 400 bar 4.6 kg
AM DN 80 PN 16 PTFE 138 20 70 130 400 bar 4.6 kg
AN DN 80 PN 16 Hastelloy 138 20 70 130 400 bar 4.6 kg
AR DN 100 PN 16 158 20 70 130 400 bar 6.2 kg
acc. to ANSI 16.5
Order Socket Cell Min. mounting Max. Weight
code Size/Nom. pr. D b d
in / lb sq in in/mm in/mm in/mm A in/mm lb/sq in
M
CK 3 / 150 71/2 / 1343/4 / 20 23/4 / 70 5 / 130 –– 4.5 kg
CR 4 / 150 81/4 / 1583/4 / 20 23/4 / 70 5 / 130 2500 6.2 kg
18 VEGADIF 34 … 51
distance pressure approx.
Product description
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Isolating diaphragm as cone socket with compression nut, FA … FK
d
M
acc. to DIN 11 851
Order Socket Cell Compression nut Min. mount. Weight
code Size/Nominal pr. D f dMG k m distance A approx.
FA DN 50/PN 25 68 11 46 Rd78x
FE DN 65/PN 25 86 12 52 Rd95x1/6" 25 21 120 4.0 kg
FK DN 80/PN 25 100 12 71.5 Rd110x1/4" 29 25 120 5.1 kg
1
/6" 22 19 120 2.2 kg
Isolating diaphragm as threaded socket, GA … GK
acc. to DIN 11 851
Order Socket Threaded socket Min. mounting Weight
code Size/Nominal pres. d1GdMdistance A approx.
d
1
d
M
GA DN 65/PN 25 66 Rd95x1/6" 52 110 3.4 kg
GK DN 80/PN 25 91 Rd110x1/6" 71.5 110 4.0 kg
GA DN 50/PN 25 60 Rd78/
1
/6" 46 110 1.8 kg
Isolating diaphragm as Clamp, HA and HK
Order Socket Terminal socket Min. mounting Weight
code Size/Nominal pres. D d
d
M
HA DN 2" PN 40 64 46 100 1.4 kg
HK DN 3" PN 40 91 71.5 100 2.4 kg
M
distance A approx.
Isolating diaphragm as DRD-flange, KE
Order Socket Dimensions Min. mounting Weight
code Nominal pr. dMdistance A approx.
A
d
M
˘64
˘84
˘105
VEGADIF 34 … 51 19
KE PN 25 see drawing 46 100 1.5 kg
Product description
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105
119
Mounting bracket Installation instructions
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ø60
85
~195
~274
105
312,5
98
x
View y
View x
y
18
35 35
4 holes
ø 10.4 mm
35
35
126
35
222
126
106
165
9
106
+
Z S
-
+
Z S
-
1.6 Approvals
For these applications the appropriate official documents (test reports, test certificates and
conformity certificates) have to be noted. These are supplied with the appropriate instrument.
Survey on the approvals which are in preparation or for which we applied
Approval CENELEC CENELEC PTB-Zone 0 FM FM WHG
Type and non incentive safe
VEGADIF 34 • • • • • •
VEGADIF 35 • • • • • •
VEGADIF 44 • • • • • •
VEGADIF 45 • • • • • •
VEGADIF 51 • • • • • •
20 VEGADIF 34 … 51
EEx ia IIC EEx d IIC EEx ia IIC Explosion proof Intrinsically
Mounting
2 Mounting
2.1 Verifying operating conditions
VEGADIF is a rugged transmitter for precise
differential pressure, level and flow measurement. The accuracy of the measurement
mainly depends on the correct installation and
the connection of the impulse lines.
Detailed information for differential pressure
measurement in aggressive products as well
as further information on wiring and coordination of valves, measuring lines and components is given in the VDI/VDE-regulations 3512
as well as DIN 19 201 and DIN 1952. Further
information on level measurement is stated in
the VDI/VDE-regulations 3519.
The differential pressure transmitter used
must meet the technical and safety requirements of the application. Therefore check from
the type plate, calibration plate and order
code the following data:
Nominal pressure
The pressure stage rating of VEGADIF must
be above the operating pressure of the process.
Measuring range
The measuring range is calibrated (factory
set) acc. to the order. The pressure values
adjusted for zero and span are documented
on the calibration plate. The values must cover
the application. If an adaptation is necessary,
this should be carried out acc. to section
4 Setup.
Materials of wetted parts
The material of the wetted parts must be sufficiently resistant. Use the respective material
tables for control. A table is given in the product information to VEGADIF, for more information we recommend the VEGA-resistance lists.
Ambient temperature
The ambient temperature in the installation
place must be in the range of -40°C … +85°C.
The surface temperature of the electronics
housing must not exceed +85°C. Hence it
should be noted that the electronics housing
should not be heated to more than +85°C due
to radiation by neighbouring instruments or
systems. If temperatures below -40°C are
expected at the installation, the transmitter
should be installed in a temperature isolated
and heated protection box. If there is danger
that measured product or condensate freezes
in the process connection or on the measuring
cell, the transmitter must be installed in a
warmer place or in a heated protection box for
process connections and process seals.
Similar measures should be taken to protect
the impulse lines.
Medium temperature
The permissible medium temperature depends on the process seal, the measuring cell
and the isolating liquid. When VEGADIF 45 or
51 are used, note that the product temperature can differ between plus and minus side.
Moisture
Mount horizontally installed instruments such
that the cable entry points to the bottom to
avoid moisture ingress. The sensor housing is
therefore rotational by approx. 350°. For vertically installed instruments loop the connection
lines in a bow pointing to the bottom to the
instrument housing, so that rain or condensation
water can drain off the cable. This is mainly
valid for mounting outside, in humid areas (e.g.
by cleaning processes) or on cooled or heated
vessels.
VEGADIF 34 … 51 21
Mounting
2.2 Pre-installation
Selection of the installation location
The selection of a suitable installation location
under extreme ambient conditions is needed
for
- quality of the measurement
- a long lifetime of the transmitter
- low maintenance expenses.
Note the following regulations:
Installation level
• For level measurements install below the
minimum level (the diaphragm or the isolating diaphragm must be completely covered).
• For measurement of gases, install transmit-
ter above the pressure tapping points.
• For the measurement of vapours and liq-
uids, install transmitter below the pressure
tapping points.
Mounting locations
• Mount the transmitter as near as possible to
the pressure tapping points.
• Keep impulse lines as short as possible.
• Mounting and maintenance work should be
carried out without obstruction.
• The transmitter, the tapping points, the
impulse lines and the valves should be
easily accessible.
• If available, the mounting place should provide a good view to the LC-display.
Adaptation of the transmitter
For optimum adaptation of your VEGADIF to
the installation place the following measures
can be carried out:
Rotate the electronics housing
After loosening the locking screw below the
electronics housing, the housing can be rotated by approx. 330°. A stop prevents further
turning. Hence the terminal compartment can
be set to an optimum position for cable entry
or the LC-display into an optimum reading
position.
Fig. 2.1 Loosen the locking screw
When the best position is reached, tighten the
locking screw again.
Ambient influences
• Keep the vibration and shock effect to a
minimum.
• Avoid corrosive ambient atmosphere.
• Reduce condensation to a minimum.
Note:
Under arduous ambient conditions, a protective housing is recommended.
22 VEGADIF 34 … 51
Fig. 2.2 Fastening of the locking screw
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