Series 3730 - Decades of Experience

The Constant

Positioners became key elements at the field level with the onset of the Industrial Internet of Things (IIoT) and Industry 4.0. On this basis, the new Ethernet-APL industry standard promises to unleash its full potential: fast communication, proven two-wire installation and use in hazardous areas. The same holds true for SAMSON's TROVIS 3797 Positioners with PROFINET® communication. They work with Ethernet-APL technology and exchanges data 300 times faster than with today's fieldbus protocols.

Features at a glance

Real-time data

Three Step-Initialization
Initialization button
Rotary pushbutton
Autotune

Flexibility

software limit contacts
fault alarm contact
inductive limit contacts
Analog feedback (4 to 20 mA)
Binary input
Safe venting function (24 V)
External position sensor
Pressure sensors

High plant availability

Integrated valve diagnostics EXPERTplus
Access to diagnostic data over all available interfaces

Continous Improvement

From a potentiometer to a contactless position measuring system

Low wear
Insensitive to steam/water hammer
higher resolution

From a matrix display to a plain text display

Multi-language capability
Clear parameter description

Optimization of pneumatics to reduce air consumption from max. 110 ln/h to max. 65 ln/h

Integrated EXPERTplus valve diagnostics

SAMSON sets new standards

Valve monitoring

Positioners are indispensable for implementing smart communication in today's control valves. Positioners compile important data about the valves as well as the entire control process. These data shine a light on the actual valve state. At SAMSON, valve diagnostics are integrated directly into the positioners. The positioners are able to save and analyze the data directly on site. Crucial diagnostic data are available in the field but they can also be transmitted to a central asset management system.
Monitoring functions

The monitoring functions play an important role in the valve diagnostics. They keep track of the valve while the process is running without disturbing it. The monitoring functions help reveal incorrect attachment, pneumatic leakage, low supply pressure, zero shifts as well as internal and external leakage at the valve.
Test functions

Diagnostic tests are performed to verify the results of the monitoring functions. These tests have priority over the positioner's actual job to position the valves. The partial stroke test (PST) and full stroke test (FST), which can be performed manually or automatically, are important test functions to check whether valves can move on demand and analyze the dynamic control response.
Status messages

The valve diagnostics integrated into the SAMSON positioners generate status messages classified according to NAMUR Recommendation NE 107. To provide a better overview of all status messages and the valve state, all status messages are summarized in a condensed state. The status message with the highest priority determines the condensed state and the action to be taken.
Plant monitoring

Valve monitoring is based on the data logged by the positioner and the integrated diagnostic functions. However, valve diagnostics cannot provide an overall assessment of all the valves in a plant. In this case, combined solutions that make use of both valve diagnostics and a higher-level asset management system, such as SAM VALVE MANAGEMENT, are the ideal approach. Complex mathematical operations paired with a considerably broader data base from the valve history open up new opportunities for data analysis. They also enable the asset management system to verify the information on the control valves' condition provided by the positioners. As a result, all control valves linked to the system can be monitored at a glance. Users benefit from the clear instructions and maintenance recommendations provided by the system.