VEGA SWING75A User Manual

Operating Instructions

VEGASWING 71A and 75A

Level and Pressure

Contents

Safety information ........................................................................ 2

1 Product description

1.1 Function and configuration .................................................. 3

1.2 Principle of operation ........................................................... 3

1.3 Technical data ....................................................................... 4

1.4 Dimensions ........................................................................... 6

2 Mounting

2.1 Mounting instructions ........................................................... 8

3 Electrical connection

3.1 Connection instructions ..................................................... 10

3.2 Wiring plan .......................................................................... 11

4Setup

4.1 Switching status ................................................................. 13

4.3 Functions chart ................................................................... 13

4.2 Switching point ................................................................... 13

Contents

5 Diagnostics

5.1 Function test ....................................................................... 14

5.2 Replacement of the electronics ......................................... 15

5.3 Maintenance ....................................................................... 15

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 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 VEGASWING 71A and 75A

Product description

1 Product description

1.1 Function and configuration

VEGASWING series 70 vibrating level
switches detect levels of liquids with a vis­cosity of 0.2 up to 10.000 mPa s and a den­sity of ≥ 0.6 g/cm
enables their use in machines, plants, ves­sels and pipelines, even in applications se­verely limited in space. Typical applications
are overfill and dry run protection.

VEGASWING 71A is optionally available with
threads G 1 A and 1" NPT. The stainless steel
housing (1.4571) is in protection class IP 67.

VEGASWING 75A is mainly suitable for level
detection in the food processing and phar­maceutical industry. Due to the polished
sensor surface (R
bacteria have no chance to collect.
VEGASWING 75A is also suitable for CIP and
SIP cleaning. Many different hygienic fittings
such as conus with compression nut, Tri­Clamp 11/2" and 2", bolting, Tuchenhagen
Varivent or special hygienic connections are
available.

Due to the simple and rugged measuring
system, VEGASWING is virtually unaffected
by the chemical and physical properties of
the liquid. They work even under unfavour­able conditions such as turbulences, air
bubbles, foam generation, buildup or varying
products. An adjustment to the medium is not
necessary.

3

. Modular construction

≤ 0.5 µm or Ra ≤ 1.5 µm)

a

1.2 Principle of operation

The tuning fork is piezoelectrically energised
and vibrates at its mechanical resonance
frequency of approx. 400 Hz. This frequency
is transferred to the electronics of VEGAS­WING. When the tuning fork is submerged in
the product, the frequency changes. This
change is detected by the integrated oscilla­tor and converted into a switching command.

By changing of poles of the supply voltage,
the switching condition can be defined (max.
detection/min. detection). With the transistor
version, PNP or NPN action can be preset by
a different connection of the consumer (load).

The integrated fault monitoring detects:

- interruption of the connection cable to the
piezo elements

- extreme wear on the tuning fork

- break of the tuning fork

- no vibration.

If one of the stated failures is determined or in
case of voltage loss, the electronics takes on
a defined switching condition, e.g. the output
transistor blocks.

The electronics can be exchanged without
problems. VEGASWING must not be re­moved.

VEGASWING has an integrated test switch
which can be activated magnetically. It tests
the sensor electronics and the connected
instruments.

VEGASWING 71A and 75A 3

1.3 Technical data

Housing

Housing material stainless steel 1.4571
Protection IP 67
Torque on the hexagon 80 Nm
Plug connection 4-pole plug

with status indication (illuminated ring)

Terminals max. 1 x 1.5 mm

Process connection

VEGASWING 71A

- thread G 1 A or 1" NPT

- material 1.4571 (stainless steel)

VEGASWING 75A

- thread G 1 A or 1" NPT

- conus DN 25

- Tri-Clamp 11/2" or 2"

- bolting DN 40 or DN 50

- Tuchenhagen Varivent

- hygienic connection with compression nut F40 PN 25

- hygienic connection with tension flange DN 32 PN 25

Tuning fork

Material 1.4581 (stainless steel)

Weight

Total weight approx. 0.4 kg

Product description

2

Ambient conditions

Ambient temperature on the housing -40°C … +70°C
Storage and transport temperature -40°C … +70°C
Product temperature -40°C … +150°C

Ambient temperature on
the housing

70°C

50°C

30°C

100°90°80°

110° 120° 130° 140° 150°C

Product
temperature

Operating pressure max. 40 bar

Product

Viscosity 0.2 … 10.000 mPa s
Density ≥ 0.6 g/cm

4 VEGASWING 71A and 75A

3

Product description

Electronics - General

Integration time approx. 0.5 s
Meas. frequency approx. 400 Hz
Hysteresis approx. 4 mm with vertical installation
Control lamp illuminated ring with two-colour LED for status

indication
green – output conductive
red – output blocks

Electronics - Transistor output (SWING E72 T)

Power supply 10 … 55 V DC
Power consumption max. 0.5 W
Output floating transistor output

NPN/PNP selectable

Load current max. 400 mA (output - overload and

permanently short-circuit proof)
Voltage loss max. 1 V
Turn-on voltage max. 55 V DC
Blocking current < 10 µA
Protection class II
Overvoltage category III
Mode A - max. detection or overfill protection

B - min. detection or dry run protection

A/B-mode by polarisation of the power

supply

Electronics - contactless electronic switch (SWING E72 C)

Power supply 20 … 250 V AC, 50/60 Hz or 20 … 250 V DC
Output contactless electronic switch
Internal current requirement approx. 3 mA (via the load circuit)
Load current min. 10 mA

max. 400 mA

(at I > 300 mA the ambient temperature can be

max. 60°C) max. 4 A up to 40 ms
Protection class I
Overvoltage category III
Modes A/B-mode by electrical connection

in the connection plug

A - max. detection, overfill protection

B - min. detection, dry run protection

CE conformity

VEGASWING 71A and 75A vibrating level switches meet the protective regulations 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

Susceptibility EN 50 082 - 2: 1995

NSR EN 61 010 - 1: 1993

VEGASWING 71A and 75A 5