lHorn or parabolic antenna
lprocess fitting (depending on the version flange or thread)
loptionally available with swivelling holder,purging air connection,
reflux valve
lHousing with electronics,optionally available with plug connector,
optionally available with connection cable
lHousing cover,optionally available with indicating and adjustment
module PLICSCOM
The components are available in different versions.
The type label contains the most important data for identification and
use of the instrument:
lSensor type
lArticle and serial number device
lArticle numbers documentation
lTechnical data:Approvals,antenna type,process fitting,process
seal/temperature,signal output,voltage supply,protection,pro-
tection class
lSIL identification (with SIL rating ex works)
With the serial number,you can access the delivery data of the
instrument via www.vega.com,"VEGA Tools"and "serial number
search".In addition to the type label outside,you can also find the
serial number on the inside of the instrument.
3.2Principle of operation
VEGAPULS 68 is a radar sensor in K-band technology for continuous
level measurement of solids.
Aversion of VEGAPULS 68 is available for each area of application:
lThe version with horn antenna is particularly suitable for
measurement of virtually all bulk solids in small silos and vessels.
lThe version with parabolic antenna is particularly suitable for large
silos and vessels with up to 70 m(76 yd)measuring distance and
for measurement of solids with low dielectric constant.
VEGAPULS 68 is also suitable for applications in liquids.
The antenna of the radar sensor emits short radar pulses with a
duration of approx.1ns.These pulses are reflected by the product
and received by the antenna as echoes.The running time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level.The determined level is converted into an
appropriate output signal and outputted as measured value.
Two-wire electronics 4…20 mA/HART for power supply and
measured value transmission over the same cable.
The supply voltage range can differ depending on the instrument
version.
Type label
Application area
Functional principle
Power supply
VEGAPULS 68 •4…20 mA/HART two-wire 9
3Product description
29261-EN-090305
The data for power supply are specified in chapter "Technical data".
The backlight of the indicating and adjustment module is powered by
the sensor.The prerequisite for this is a supply voltage at a certain
level.The exact voltage specifications are stated in chapter "Technical
data".
The optional heating requires its own operating voltage.You can find
detailed information in the supplementary instructions manual "Heating
for indicating and adjustment module".This function is generally not
available for approved instruments.
3.3Operation
VEGAPULS 68 can be adjusted with different adjustment media:
lwith indicating and adjustment module
lwith the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard,e.g.PACTware and
PC
lwith manufacturer-specific adjustment programs AMS™or PDM
lWith a HART handheld
The entered parameters are generally saved in VEGAPULS 68,
optionally also in the indicating and adjustment module or in
PACTware.
3.4Packaging,transport and storage
Your instrument was protected by packaging during transport.Its
capacity to handle normal loads during transport is assured by a test
according to DIN EN 24180.
The packaging of standard instruments consists of environment-
friendly,recyclable cardboard.For special versions,PE foam or PE foil
is also used.Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out under consideration of the notes on the
transport packaging.Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt.Ascertained transit damage or
concealed defects must be appropriately dealt with.
Up to the time of installation,the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated,the packages must be stored only under
the following conditions:
lNot in the open
Packaging
Transport
Transport inspection
Storage
10 VEGAPULS 68 •4…20 mA/HART two-wire
3Product description
29261-EN-090305
