Germany original Samson control valve positioner 3730-3
Electropneumatic positioner with HART® communication
Product description
single-acting or double-acting positioner for attachment to
pneumatic control valves. Self-calibrating, automatic adaptation to
valve and actuator.
The positioner ensures a predetermined assignment of the valve
position (controlled variable x) to the input signal (set point w).
It compares the input signal received from a control system to the
travel or rotational angle of the control valve and issues a
corresponding output signal pressure (output variable y).
• 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
• Confi gurable with a PC over the SSP interface using the
TROVIS-VIEW software
• Variable, automatic start-up with four different initializati on
modes
• Preset parameters - only values deviating from the stan dard 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 a small electrical load of 410 Ω
• Adjustable output pressure limitation.
• Activatable tight-closing function
• Continuous monitoring of zero point
• Integrated temperature sensor and operating hours counter
• 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
specification
| Brand name | Samson |
| Model | 3730-3 |
| Produce type | Control Valve Positioner |
| Set point | 4 to 20 mA |
| Valve travel | 3.6 to 300 mm |
| Opening angle | 24 to 100° |
| Characteristic | Linear |
| Immunity to vibration | Up to 10 g in the range of 10 to 2000 Hz |
| Degree of protection | IP 67 |
| Auxiliary power | 12 to 30 V DC · Reverse polarity protection · Static destruction
limit 40 V |
3730-3 · Electropneumatic positioner for control valves, on-site
operation, local communication with SSP interface, EXPERTplus
diagnostics, HART® communication
Principle of operation
The positioner is mounted on pneumatic control valves and is used
to assign the valve position (controlled variable x) to the control
signal (set point w). The positioner compares the elec-tric control
signal of a control system to the travel or rotationalangle of the
control valve and issues a signal pressure (output variable y) for
the pneumatic actuator.
