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DESCRIPTION The Type AV3 positioner is an electro-pneumatic control device that satisfies a wide range of applications. It provides fast, sensitive and accurate positioning of pneumatic single or double acting actuators. The Type AV3 positioner accepts a 4-20 mA current that is applied to an I/P converter to generate an internal signal pressure. If a loss of signal occurs the positioners retain their position just prior to the signal loss. This strategy is ideal for process applications such as with fuel, cooling water and fan dampers where interruptions are unacceptable. The Type AV3 positioner can be equipped with either an optional potentiometric or a 4-20 mA position transmitter.
FEATURES
• Withstands vibration and shock at frequencies to 120 Hz and accelerations to 2G • Low air consumption
• Can control both single and double-acting, linear and rotary type actuators • Simplified reverse operation
• Split range capability allows sequencing of multiple actuators using a single control signal • Continuously adjustable span and zero for each stroke level • Adjustable speed control of actuator without additional hardware
• Standard model has high delivery capacity and Performance Series increases speed of response even more • Vent design allows natural gas operation • NEMA 4X version available • Optional manifold assembly
• Large array of accessories available to customize for specific applications
SPECIFICATIONS Input range¹
Input impedance Accuracy² Resolution Hysteresis²
Repeatability² Deadband² Linearity² Weight
4 to 20 mA (30 VDC maximum)
<1.66 O at 4 mA <0.57 O at 12 mA <0.35 O at 20 mA 0.90% of span maximum 0.30% of span maximum 0.60% of span maximum 0.60% of span maximum 0.30% of span maximum 0.80% of span maximum 2.27 kg (5.00lb)
Operating temperature limits³ -20ºC to 60ºC (-4ºF to 140ºF)4 Storage temperature limits³ Temperature effect² Humidity limits RFI effect²
Notes:
1. Units have 50% range suppression and/or zero elevation capability. 2. Tested according to ISA-S75. 13-1989 3. Operation below specification will increase stroke time.
4. For operation below 4.4ºC (40ºF), dew point of supply air must be 10ºC (18ºC) lower than lowest expected operating temperature.
-20ºC to 80ºC (-4ºF to 176ºF) <0.18% per ºC (<0.09% per ºF)
Operating and storage: 0% to 95% noncondensing ±1.5% maximum at 10 V/m field strength, 20 to 540 MHz