VPT10-H
HART
®
PRESSURE TRANSMITTER
INSTALLATION, OPERATION, CONFIGURATION AND MAINTENANCE MANUAL
____________________________________________________________________________________________________________________________
6
1
EQUIPMENT DESCRIPTION
VPT10-H is a transmitter for differential, absolute or gauge pressure, level or flow measurements with HART
®
technology, which integrates Vivace Process Instruments family of field devices.
The transmitter features intelligent, microprocessor-based capacitive sensor for safe operation and excellent field
performance. It has integrated pressure and temperature compensations, providing high performance and stability
of measurements.
VPT10-H must be powered by a voltage of 12 to 45 Vdc in order to generate a 4-20 mA current channel (according
to NAMUR NE43) proportional to the measurement performed.
Its configuration uses HART
®
7 communication protocol, already recognized as the most used in the world of
industrial automation for configuration, calibration, monitoring and diagnostics, and can be performed by the user
with the use of a HART
®
configurator or EDDL
®
or FDT/DTM
®
-based tools. In addition, the main parameters can be
set via local adjustment using a magnetic tool.
VPT10-H intelligent pressure transmitter is factory calibrated before shipment to customers. If it is necessary to
recalibrate this transmitter in the field, be sure to use a calibrator at least three times more accurate than the
specifications. To ensure correct and efficient use of the transmitter, please read this manual before installation.
1.1.
BLOCK DIAGRAM
The modularization of the transmitter components is described in the following block diagram.
Figure 1.1 –VPT10-H block diagram.
The main board controls the main functions of the pressure transmitter. It contains a HART
®
Modem and a
microcontroller (CPU). The sensor board is responsible for reading the capacitance of the capacitive sensor, as well
as the temperature and its processing with the main CPU.
The HART
®
modem block interfaces the microcontroller signals with the HART
®
line to which the transmitter connects.
The display board has the controller block that interfaces between the LCD and the CPU, adapting the messages to
be displayed.
Finally, the microcontroller block can be related to the transmitter's brain, which manages all the time controls, HART
®
state machines, diagnostics and routines common to transmitters, such as configuration, calibration and generation of
the digital output value for current, proportional to the PV variable.