
3.2Principle of operation
IPT-1*Vers.4.0is a pressure transmitter for use in the paper,food
processing and pharmaceutical industries as well as in water/sewage
water plants.Depending on the version,it is used for level,gauge,
absolute pressure or vacuum measurement.Measured products are
gases,vapours and liquids,also those containing abrasive substan-
ces.
Ameasuring cell with front-flush,abrasion-resistant diaphragm is the
sensor element.The hydrostatic pressure of the product or the
process pressure effects a capacitance change in the measuring cell
via the diaphragm.This change is converted into a respective output
signal and outputted as measured value.
The ceramic measuring cell is also equipped with a temperature
sensor.The temperature value can be displayed via the indicating and
adjustment module or processed via the signal output.
Power supply via the Profibus DP/PA segment coupler.Atwo-wire
cable according to Profibus specification serves as carrier of both
power and digital data transmission for multiple sensors.The
instrument profile of IPT-1*Vers.4.0corresponds to profile specifi-
cation version 3.0.
The GSD (instrument master files)and bitmap files necessary for
planning your Profibus-DP-(PA)communication network are available
from the download section on the WIKA homepage www.wika.com
under "Service".There you can also find the appropriate certificates.In
aPDM environment,an EDD (Electronic Device Description)is also
required to enable the full range of sensor functions (also available as
a download).A CD with the appropriate files can be ordered via e-mail
under info@de.WIKA.com or by phone from one of the WIKA
agencies.
The backlight of the indicating and adjustment module is powered by
the sensor.Prerequisite is a certain level of operating voltage.
The data for power supply are specified in chapter "Technical data".
This function is available at a later date for instruments with StEx,
WHG or ship approval as well as country-specific approvals such as
those according to FM or CSA.
3.3Operation
IPT-1*Vers.4.0can be adjusted with different adjustment media:
lwith indicating and adjustment module
lthe Simatic adjustment program PDM
The entered parameters are generally saved in IPT-1*Vers.4.0,
optionally also in the indicating/adjustment module.
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
8Process pressure transmitter IPT-11 Vers.4.0-ceramic sensor •Profibus PA
3Product description
31547-EN-081211