Owner's manual

3.2 Principle of operation
IPT-1* Vers. 4.0 is 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.
A measuring 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 me asured 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 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. 4.0 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. 4.0 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. 4.0,
optionally also in the indicating/adjustment module.
Application area
Functional principle
Power supply and bus
communication
GSD/EDD
8 Process pressure transmitter IPT-11 Vers. 4.0 - ceramic sensor • Profibus PA
3 Product description
31547-EN-081211