3725 – Series
• Easy operation with intuitive navigation menu using three capacitive keys
• LCD easy to read in any mounted position due to selectable reading direction
• Variable, automatic start-up
• Preset parameters (only values deviating from the standard need to be adjusted)
• Permanent storage of all parameters in a non-volatile memory (EEPROM)
• Tight-closing function can be activated
• Continuous monitoring of zero point
• Non-contact position sensing
• Unaffected by environmental effects and steam hammering
| Data sheet | Technical summary | IOM |
3730 – Series
• Any desired mounting position of the positioner (but not suspended)
• Simple single-knob, menu-driven operation
• LCD easy to read in any mounted position due to selectable reading direction
• Configurable with a PC over the SSP interface using the TROVIS-VIEW software
• Variable, automatic start-up with four different initialization modes
• Preset parameters – only values deviating from the standard need to be adjusted
• Calibrated travel sensor without gears susceptible to wear
• Sub initialization mode (substitution) allows the positioner to be started up in case of emergency whilst the plant is running without the valve moving through the whole travel range.
• Permanent storage of all parameters in EEPROM (protected against power failure)
• Two-wire system with small electrical load between 300 and 350 Ω depending on version (see Table 1)
• Adjustable output pressure limitation
• Activatable tight-closing function
• Continuous monitoring of zero point
• Integrated temperature sensor and operating hours counter
Series 3730
Type 3730-2 Electropneumatic Positioner
Application
Single-acting or double-acting positioner for attachment to
pneumatic control valves. Self-calibrating, automatic adaptation
to valve and actuator.
Set point 4 to 20 mA
Valve travel 3.6 to 300 mm
Opening angle 24 to 100°
• Two standard programmable position alarms
• Self-diagnostics; alarms as condensed state conforming to NAMUR Recommendation NE 107, issued over a fault alarm contact or optional analog position transmitter
• Integrated EXPERTplus diagnostics for control valves
| Data sheet | Technical summary | IOM |
3793-Series
• Diagnosis data are constantly compiled, saved and analyzed in the positioner. Status messages are automatically generated. Test data and their analysis are saved in the positioner.
• Cyclical polling of diagnosis data, multiplexer-capable
• Minimum and maximum temperature readings with an alarm when the limits have been exceeded
• Statistical information (in-service monitoring) and tests (out-of-service diagnostics) pinpoint critical states before malfunctions can affect the process, allowing the user to plan predictive maintenance and service work on control valves
• Display of classified status and error messages
• Status classification and condensed state based on NAMUR Recommendation NE 107
• Status messages and condensed state can also be read off at the positioner display Series 3793 TROVIS 3793 Electropneumatic Positioner EXPERTplus valve diagnostics
• Operating hours counter allows data and events to be sorted by time
• Step response test to assess the valve’s ability to move
• Diagnosis data, test results and analysis saved in the positioner
| Data sheet | Technical summary | IOM |