Beschreibung
OMEGA’s PX921 Series Wireless Transmitters are designed for safe operation in tough industrial installation - without the need for hard wiring! The PX921 operates by radio telemetry. A low power RF transmitter safely transmits the signal up to 500 feet to a receiver / retransmitter where it is converted into a 4-20 mA signal. Rugged stainless steel construction featuring S.O.S. technology with a custom IC amplifier give the PX921 series high stability, low drift and long life. SOS construction uses very stable solid state silicon strain gages on a Sapphire carrier which is glass bonded to a titanium diaphragm. This combination provides a very durable transducer which has excellent stability over a wide temperature range. Additionally, the titanium diaphragm and Stainless Steel wetted parts provide maximum durability and corrosion resistance to harsh industrial chemicals.(PX921 TRANSDUCER)
Excitation: Internal Battery: 10.5 to 15 Vdc (not supplied) External Supply: 10.5 to 30 Vdc Output: Local Test Voltage: 0.5 to 2.0 Vdc FS Data Transmission: Serial bit stream Data Speed: 4800/9600 baud Accuracy: Resolution: 12 bit ADC Linearity and Hysteresis: 0.3% Sensing Element: 4 active-arm bridge using Silicon-on Sapphire thin-film elements Operating Temp Range: -20° to 80°C (-4° to 176°F) Compensated Temp Range: 0° to 80°C (32° to 176°F) Media Temp Range: -40° to 120°C (-40° to 248°F) Thermal Effects: (Over the compensated range) Span: ±0.03% FS/°C Zero: ±0.02% FS/°C Proof Pressure: 1.5 times rated pressure will not cause changes in performance beyond the specified tolerance Wetted Parts: 17-4 PH and 304 Stainless Steel and Titanium Diaphragm Body: 300 Series Stainless Steel, sealed to IP65 (NEMA 4) Electrical Connection: Internal Screw Terminals via gland Pressure Port: ½ NPT Male Weight: 1.2 kg (2.65 lb) maximum |
(PX921 RECEIVER)
Input: Data Transmission: Serial bit stream from PX921 Data Speed: 4800/9600 baud Output: Analog: 4 to 20 mA dc Load Driving: 1500Ω maximum Accuracy: Resolution: 12 bit DAC Linearity and Hysteresis: ±0.3% FS Body: Polycarbonate enclosure sealed to IP65 (NEMA 4X) Excitation: 10.5 to 30 Vdc UHF Radio Transmitter/Receiver: Carrier Frequency: 418 mHz Modulation Type: FM |