User guide

3.2 Principle of operation
IPT-1* Vers. 2.0 is a pressure transmitter for measurement of gauge
pressure, absolute pressure or vacuum. Measured products are
gases, vapours and liquids.
Sensor element is the ceramic measuring cell with rugged ceramic
diaphragm. The process pressure causes a capacitance change in the
measuring cell via the diaphragm. This change is converted into an
appropriate output signal and outputted as measured value.
The measuring cell is a lso 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 seg ment coupler. A two-wire
cable according to P rofibus specification serves as carrier of both
power and digital data transmission for multiple sensors. The
instrument profile of IPT-1* Vers. 2.0 corresponds 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
a PDM 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 [e-mail] 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.
3.3 Operation
IPT-1* Vers. 2.0 can be adjusted with different adjustment media:
l with indicating and adjustment module
l the Simatic adjustment program PDM
The entered parameters are generally saved in IPT-1* Vers. 2.0,
optionally also in the indicating/adjustment module.
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
8 Process pressure transmitter IPT-10 Vers. 2.0 - ceramic sensor • Profibus PA
3 Product description
31541-EN-081211