VEGA BAR25 User Manual
Operating Instructions
VEGABAR 25
87654321
+ -
-
DISPLAY
4 ¼ 20 mA
+
VEGADIS 10
12 ¼ 36 V DC E12
Level and Pressure
0 - 20 bar
p
Safety information
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.
2 VEGABAR 25
Note Ex-area
Please note the approval documents attached
(yellow binder), and especially the safety data
sheet included.
Contents
Contents
Safety information ........................................................................ 2
Note Ex-area ................................................................................ 2
1 Product description
1.1 Function and configuration .................................................. 4
1.2 Self-monitoring ..................................................................... 4
1.3 Technical data....................................................................... 5
1.4 Approvals ............................................................................. 8
1.5 Dimensions ........................................................................... 9
2 Mounting................................................................................... 11
3 Electrical connection
3.1 Connection information ...................................................... 11
3.2 Connection plan ................................................................. 12
3.3 Connection examples ........................................................ 13
4 Set-up
4.1 Adjustment of the basic functions .................................... 14
4.2 Menu-guided adjustment with additional functions ......... 15
4.3 Indicating module ............................................................... 20
5 Diagnosis
5.1 Maintenance ....................................................................... 21
5.2 Failure removal ................................................................... 21
6 Instrument modification
6.1 Interchanging adjustment modules .................................. 23
VEGABAR 25 3
1 Product description
Product description
1.1 Function and configuration
The VEGABAR 25 process pressure transmitters are efficient instruments for process
pressure measurement. The dry CERTEC
metal-capacitive measuring cell is used as a
pressure sensor element. The process pressure causes a capacitance change within the
measuring cell via the diaphragm. This capacitance change is detected by an ASIC
(application specific integrated circuit) and
converted into a pressure proportional signal
by an integral oscillator with microcomputer.
Precise digital processing of measured data
with highest resolution ensures excellent
technical data.
The oscillator is powered by a separate
VEGA-signal conditioning instrument, a stabilised power supply unit or a PLC (active
input). After the adjustment, a standardised
current signal of 4 … 20 mA is available
which can be displayed (e.g. in PLC-systems) or further processed.
Four versions are available for adjustment:
- adjustment module directly on VEGABAR
- adjustment module in external housing
(VEGADIS 10)
- via PC with adjustment software (see
manual “VEGA Visual Operating (VVO)“)
- in the control room on the signal conditioning instrument
®
1.2 Self-monitoring
Important electronic components are
checked for their function, while internal parameters, such as sensor value, temperature
and operating voltage, are monitored to increase reliability.
If failures or malfunctions are detected during
these routines, a fault signal is triggered via
the 4 … 20 mA-output (current jump to
3,6 mA or 22 mA).
4 VEGABAR 25
Product description
1.3 Technical data
Mechanical data
Materials, wetted parts
Process connection stainless steel 1.4571
Diaphragm Duratherm 600 (highly corrosion-resistant stain
Materials, non-wetted parts
Housing high resistance plastic PBT (Polyester)
Earth terminal stainless steel 1.4305
Indicating module window glass
Weight
VEGABAR approx. 0,5 … 8 kg (dependent on process
Adjustment and indicating elements
Adjustment of the basic functions 2 keys, 1 rotating switch
Menu-guided adjustment with
additional function
- adjustment elements 4 keys
- indicating elements DOT-matrix display, 3 lines with 7 figures each
Indicating module LC-display with
less steel)
connection)
- bar graph (20 segments)
- digital value (4-digit)
- tendency indicators for raising or lowering
values
Electrical data
Connection
Cable entry PG 13,5 (for cable-ø 5 … 10 mm)
Screw terminals for conductor cross-sections of up to
Protective measures
Protection
1)
Protection class III
Overvoltage category III
CE-conformity
VEGABAR 25 corresponds to the requirements 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: 1992
Susceptibility EN 50 082 - 2: 1995
NSR EN 61 010 - 1: 1993
1)
Use of a suitable seal for the cable in the PG is necessary for maintaining the housing protection. If the seal
used does not fit the cable, it should be replaced by a suitable one.
VEGABAR 25 5
2,5 mm
IP 65
2
NAMUR-regulations
The NAMUR-regulations NE 21, May 1993 are met.
Supply and signal circuit
Supply voltage 12 … 36 V DC
Permissible residual ripple USS - 1 V
Output signal
- range 3,8 … 20,5 mA
- resolution 6 µA
Current limitation approx. 22 mA
Fault signal 22 mA (3,6 mA)
Integration time 0 … 10 s adjustable
Average delay time 150 ms
Connection cable 2-wire
Max. permissible load dependent on supply voltage
(see load diagram)
1000
750
in Ohm
500
total
250
Load RL
0
12
18 24 30 36
Voltage of the external energy UH in Volts
Product description
Indicating and adjustment circuit
For connection to VEGADIS 10 and/or the indicating module
Data transmission digital
Connection cable 4-wire (standard cable)
Cable length max. 25 m
Transmission reaction
Measuring ranges
Zero -20 % … +95 % adjustable of nominal range
Span 3,3 % … 120 % adjustable of nominal range
Turn up up to +95 %
Turn down up to 1 : 30
Recommended turn down:
Accuracy class 0,25 up to 1 : 5
Accuracy class 0,1 up to 1 : 10
6 VEGABAR 25
Product description
Measuring ranges
Nominal range Gauge pressure Low pressure
resistance
1)
resistance
0 … 0,1 bar 10 bar -0,1 bar
0 … 0,2 bar 15 bar -0,2 bar
0 … 0,4 bar 20 bar -0,4 bar
0 … 1,0 bar 25 bar -1,0 bar
0 … 2,5 bar 35 bar -1,0 bar
0 … 5,0 bar 45 bar -1,0 bar
0 … 10,0 bar 60 bar -1,0 bar
0 … 20,0 bar 90 bar -1,0 bar
-0,5 … +0,5 bar 25 bar -1,0 bar
-1,0 … +0,0 bar 25 bar -1,0 bar
-1,0 … +1,5 bar 35 bar -1,0 bar
-1,0 … +4,0 bar 45 bar -1,0 bar
-1,0 … +10,0 bar 60 bar -1,0 bar
-1,0 … +20,0 bar 90 bar -1,0 bar
Accuracy (similar to DIN 16 086, DIN V 19 259 - 1 and IEC 770)
Deviation
Reference conditions (acc. to IEC 770)
- temperature 18°C … 30°C rel. humidity
- air pressure 860 kPa … 1060 kPa
Deviation in characteristics limit point adjustment acc. to DIN 16 086
Characteristics linear
Deviation of characteristics
- accuracy class 0,25 < 0,25 %
- accuracy class 0,1 < 0,1 %
Hysteresis
Repeatability
2)
2)
2)
< 0,05 %
< 0,05 %
Influence of the ambient temperature
Average temperature coefficient
of the zero signal
2) 3)
- accuracy class 0,25 < 0,15 %/10 K
- accuracy class 0,1 < 0,05 %/10 K
1)
Note nominal pressure stage of the process connection!
2)
Relating to the nominal pressure.
3)
In compensated temperature range of 0°C … 80°C, reference temperature 20°C.
VEGABAR 25 7
Product description
Long-term stability
Long-term drift of the zero signal
1) 2)
< 0,25 %
Other actuating variables
Calibration position standing, diaphragm pointing downwards
Influence of the installation position < 5 mbar
Vibration resistance mechanical vibrations with 4 g and
5 … 100 Hz, tested acc. to the regulations of
German Lloyd GL-characteristics 2
Operating conditions
Product
Aggregate condition gas, steam, liquid up to high viscosity
also abrasive and aggressive with suitable
material selection of wetted parts
acc. to order code
Ambient conditions
Ambient temperature -40°C … +85°C
- indicating module -20°C … +70°C
Storage and transport temperature -40°C … +85°C
Product temperature -40°C … +100°C
1.4 Approvals
StEx Zone 10
Ship approval
CENELEC EEx ia IIC
A TEX II 1G EEx ia IIC and WHG
A TEX II 1G EEX ia IIC and ship approval
DVGW (applied)
If the use of approved instruments is required for certain applications, the appropriate legal
documents (test reports, test certificates and conformity certificates) must be observed.
These are supplied with the appropriate instrument.
1)
Relating to the nominal range.
2)
Acc. to IEC 770, item 6.1.2 relating to the nominal range.
8 VEGABAR 25
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