Manual

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 is supplied via the H1 Fieldbus. A two-wire cable according to
Fieldbus specification serves as carrier of both power and digital data
for multiple sensors. This cable can be operated in two versions:
l via an H1 interface card in the control system and additional power
supply
l via a Linking device
with HSE (High speed
Ethernet) and additio-
nal power supply ac-
cording to IEC 61158-2
The DD (Device Descriptions) and CFF (capability files) necessary for
planning and configuration of your FF (Foundation Fieldbus) commu-
nication network are available in the download area of the WIKA
homepage
www.wika.com under "Services". The appropriate certifi-
cates are also available there. A CD with the appropriate files and
certificates 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.
Application area
Functional principle
Power supply and bus
communication
DD/CFF
8 Process pressure transmitter IPT-10 Vers. 2.0 - ceramic sensor • Foundation F ieldbus
3 Product description
31542-EN-081211