VEGA BAR21 User Manual
Operating Instructions
VEGABAR 21
87654321
+ -
-
DISPLAY
4 ¼ 20 mA
+
VEGADIS 10
12 ¼ 36 V DC E12
Level and Pressure
+ 4 … 20 mA
12 … 36 V DC E12
+
DISPLAY
VEGADIS 10
OK
87654321
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 21
Note Ex-area
Please note the approval documents attached
(yellow binder), and especially the included
safety data sheet.
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 and certificates ................................................ 10
1.5 Dimensions ......................................................................... 10
2 Mounting................................................................................... 13
3 Electrical connection
3.1 Connection information ...................................................... 13
3.2 Connection plan ................................................................. 14
3.3 Connection examples ........................................................ 15
4 Set-up
4.1 Adjustment of the basic functions .................................... 16
4.2 Menu-guided adjustment with additional functions ......... 17
4.5 Indicating module ............................................................... 22
5 Diagnosis
5.1 Maintenance ....................................................................... 23
5.2 Failure removal ................................................................... 23
6 Instrument modification
6.1 Interchanging adjustment modules .................................. 25
7 Measurement with isolating systems ................................. 26
VEGABAR 21 3
1 Product description
Product description
1.1 Function and configuration
VEGABAR 21 is an efficient pressure transmitter with isolating system for process pressure measurement and hydrostatic level
measurement. The hydrostatic pressure of
the medium acts on the separating diaphragm of the isolating system and is transferred via the isolating liquid to a ceramiccapacitive measuring cell CERTEC®. The
pressure on this measuring cell effects a
capacitance change within the measuring
cell. This capacitance change is detected by
an ASIC (Application specific integrated
circuit) and converted by an integral oscillator with microcomputer into a pressure proportional signal. The exact, digital processing
of measured data with highest resolution
ensures perfect technical data.
Isolating systems are used to protect the
measuring cell against aggressive products
and high temperatures. Due to the suitable
selection of isolating liquid and diaphragm
material, systems with a temperature resistance up to 400°C are possible.
The oscillator is powered by a separate
VEGA-signal conditioning instrument, a stabilised power supply unit or a DCS (active
input). After the adjustment, a standardised
current signal 4 … 20 mA is available which
can be displayed (e.g. in DCS-systems) or
further processed.
1.2 Self-monitoring
Important electronics components are
checked on their function and internal parameters such as sensor value, temperature and
operating voltage are monitored to increase
the reliability.
VEGABAR 21 with ceramic CERTEC®-measuring cell offers the advantage of a continuous self-monitoring. Measuring and reference
capacitance of the measuring cell are in a
defined relation over the complete measuring
range. Each deviation from these data is a
reliable indicator for a malfunction of the
measuring cell.
If during these routines failures or malfunctions are detected, a fault signal is triggered
via the 4 … 20 mA-output (current jump to
3,6 mA or 22 mA).
Two versions are available for adjustment:
- adjustment module directly on VEGABAR
- adjustment module in external housing
(VEGADIS 10)
4 VEGABAR 21
Product description
1.3 Technical data
Mechanical data
Materials, wetted parts
Process connection stainless steel 1.4571
Diaphragm stainless steel 1.4571, Hastelloy C276 or B2,
Extension stainless steel 1.4571
Materials, non-wetted parts
Housing high resistance plastic PBT (Polyester)
Earth terminal stainless steel 1.4305
Window of the indicating module Lexan
Weight
VEGABAR approx. 0,8 … 8 kg
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
Monel 400, Tantalum, PTFE-foil on 1.4571
(dependent on the isolating system)
- bargraph (20 segments)
- digital value (4-digit)
- tendency indicators for raising or falling
values
Electrical data
Connection
Cable entry M20 x 1,5 (for cable-ø 5 … 9 mm)
Screw terminals for cross-section area of conductor up to
Protective measures
Protection
1)
Protection class III
Overvoltage category III
1)
For maintaining the housing protection, the use of the suitable seal for the cable in the Pg is necessary. If
the used seal does not fit with the cable, it should be replaced by a suitable one.
VEGABAR 21 5
2,5 mm
IP 65
2
Product description
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 22 mA
Fault signal 22 mA (3,6 mA)
Integration time 0 … 10 s adjustable
Average delay time 70 ms
Connection line 2-wire
Max. permissible load dependent on the supply voltage
(see load diagram)
1000
750
in Ohm
total
500
250
Load RL
0
12
18 24 30 36
Voltage of the external energy UH in Volts
Indicating and adjustment circuit
For connection to VEGADIS 10 and/or the indicating module
Data transmission digitally
Connection line 4-wire
Max. line length 25 m
Adjustment ranges
Zero -20 % … +95 % adjustable of nominal range
Span 3,3 % … 120 % adjustable of nominal range
Recommended turn down:
- accuracy class 0,25 up to 1 : 5
- accuracy class 0,1 up to 1 : 10
6 VEGABAR 21
Product description
Measuring ranges
Nominal measuring Gauge pressure Low pressure
range resistance
1)
resistance
Relative pressure
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 … 40,0 bar 140 bar -1,0 bar
0 … 60,0 bar 200 bar -1,0 bar
-0,05 … 0,05 bar 10 bar -0,1 bar
-0,1 … +0,1 bar 15 bar -0,2 bar
-0,2 … +0,2 bar 20 bar -0,4 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
-1,0 … +40,0 bar 140 bar -1,0 bar
-1,0 … +60,0 bar 200 bar -1,0 bar
Absolute pressure
0 … 1,0 bar 25 bar
0 … 2,5 bar 35 bar
0 … 5,0 bar 45 bar
0 … 10,0 bar 60 bar
0 … 20,0 bar 90 bar
0 … 40,0 bar 140 bar
0 … 60,0 bar 200 bar
1)
Note the nominal pressure of the process connection!
VEGABAR 21 7
Accuracy (similar to DIN 16 086, DIN V 19 259 - 1 and IEC 770)
Influence of the ambient temperature
Average temperature coefficient
of the zero signal
- accuracy class 0,25 < 0,15 %/10 K
- accuracy class 0,1 < 0,05 %/10 K
1) 2)
Product description
Long-term stability
Long-term drift of the zero signal
1) 3)
< 0,1 % (meas. cell, without considering the
isolating system)
Deviation
Reference conditions (acc. to IEC 770)
- temperature 15°C … 35°C
- rel. humidity 45 % … 75 %
- air pressure 860 mbar … 1060 mbar
Determination of characteristics limit point adjustment acc. to DIN 16 086
Characteristics linear
Deviation in characteristics
1)
- accuracy class 0,25 < 0,25 %
- accuracy class 0,1 < 0,1 %
Hysteresis
Repeatability
1)
1)
< 0,02 %
< 0,02 %
Other actuating variables
Calibration position standing, diaphragm points downwards
Vibration resistance mechanical vibrations with 4 g and
5 … 100 Hz, tested acc. to the regulations of
German Lloyd GL-characteristics 2
Operating conditions
Ambient conditions
Ambient temperature -40°C … +85°C
- indication module -20°C … +70°C
Storage and transport temperature -40°C … +85°C
Medium temperature -40°C … +100°C
Medium temperature, abhängig von
Druckmittlerflüssigkeit Temperature
- silicone oil -40°C … +130°C / -40°C … +130°C
- silicone oil and cooling element -40°C … +200°C / -40°C … +130°C
- silicone oil and capillaries 1 m -40°C … +200°C / -40°C … +130°C
- vegetable oil -10°C … +130°C / -10°C … +130°C
- vegetalble oil and cooling element -10°C … +250°C / -10°C … +130°C
- high temperature oil a. cooling element -10°C … +400°C / -10°C … +200°C
- high temperature oil and capillaries 1 m -10°C … +400°C / -10°C … +200°C
1)
Relating to the nominal range.
2)
In the compensated temperature range of 0°C … +80°C, reference temperature 20°C. Without isolating
diaphragm, capillaries, cooling element (see influence of the ambient temperature).
3)
Acc. to IEC 770, item 6.1.2 relating to the nominal range.
4)
At pabs < 1 bar (vacuum range ) the isolating liquid boils already at low temperatures.
8 VEGABAR 21
p
> 1 bar / p
abs
4) < 1 bar
abs
Product description
Zusätzlicher Temperatureinfluß durch Druckmittler
Process connection Temperature coefficient
[mbar/10 K]
FA Flange DN 25 PN 40 acc. to DIN 2501,
seal surface acc. to DIN 2526 Form D 1,8
FB Flange DN 40 PN 40 acc. to DIN 2501,
seal surface acc. to DIN 2526 Form D 1,0
FC Flange DN 50 PN 40 acc. to DIN 2501,
seal surface acc. to DIN 2526 Form D 2,0
FE Flange DN 50 PN 40 with ext. 100 mm 1,9
FG Flange DN 50 PN 40 with ext. 200 mm 2,1
FH Flange DN 80 PN 40 acc. to DIN 2501,
seal surface acc. to DIN 2526 Form D 0,4
FK Flange DN 80 PN 40 with ext. 100 mm 0,5
FN Flange DN 1" 300 lbs acc. to ANSI B 16.5,
seal surface RF 1,8
FO Flange DN 2" 600 lbs acc. to ANSI B 16.5,
seal surface RF 2,0
- by cooling elements,
dependent on diaphragm-ø 0,1 … 1,5 mbar/10 K
- by 1 m capillary line
dependent on diaphragm-ø 0,1 … 15 mbar/10 K
VEGABAR 21 9
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