PX921-005GI壓力變送器 美國omega
藍寶石上硅無線壓力變送器，長期可靠性
PX921
藍寶石上硅傳感器保證了高的穩(wěn)定性和可重復(fù)性
低功率無線電發(fā)射機內(nèi)置的范圍可達500英尺
12位高精度
不需要許可
IP65/NEMA 4不銹鋼閥體
固態(tài)可靠性
高沖擊和振動
歐米茄的px921系列無線發(fā)射器的設(shè)計**運行在惡劣的工業(yè)安裝無硬接線的需要！該px921通過無線電遙測。低功率射頻發(fā)射器的**傳輸信號到500英尺接收器/轉(zhuǎn)發(fā)器，它轉(zhuǎn)換成一個4-20毫安信號。堅固的不銹鋼結(jié)構(gòu)特點S.O.S.技術(shù)與定制集成電路放大器給px921系列高穩(wěn)定，低漂移和壽命長。SOS建設(shè)使用非常穩(wěn)定的固態(tài)硅應(yīng)變計在藍寶石載體為玻璃鍵合到一個鈦膜。這種組合提供了一個非常耐用的傳感器已在很寬的溫度范圍內(nèi)具有良好的穩(wěn)定性。此外，鈦膜與不銹鋼接觸部分提供*大的耐久性和耐腐蝕性，惡劣的工業(yè)化學(xué)品。
規(guī)格
(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)
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: ? 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
OPERATION:
The PX921 pressure transmitter converts pressure measurements to a digital code which is processes by the onboard microcontroller. The microcontroller generates a coded data frame in accordance with the protocol. This frame is then transmitted by UHF to the PX921-R where it is decoded, validated and converted to an analog 4 to 20 mA signal. This signal can then be transmitted and interface with all standard 20 mA loop instruments.
DATA TRANSMISSION:
Data is transmitted as a bit stream data frame using asynchronous protocol. a random delay between transmissions minimizes collisions between adjacent streams. Data error detection is employed to allow error free operation in high interference environments. Indication of receipt of uncorrupted data is provided on the PX921-R unit.
RADIO LICENSE:
No license is required with this equipment. Data transmission is via a radio transmitter operating at a designated low power UHF telemetry frequency. It operates in the 418 MHz region @ 0.25 mW.
INSTALLATION:
The PX921 is simple to install and does not require additional configuration tools. Once the PX921 has been connected to the process fitting, configuration is easily carried out by setting a series of miniature switches which are under the cover of the transducer. At this stage it is possible to check the calibration of the unit locally by measuring the voltage across tow test points, which can then be adjusted with the zero and span trimmers if required.
POWER SUPPLY Units may be powered by either an internal battery (10.5 to 15 Vdc) or by an external supply voltage (10.5 to 30 Vdc). In battery mode, a duty cycle power saving system is employed to extend battery life.
注釋: Metric Ranges Available - Consult Engineering
產(chǎn)品型號/產(chǎn)品描述
PX921-30VACI 0-30 inches of Mercury wireless vacuum transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-005GI 0-5 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-010GI 0-10 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-015GI 0-15 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-030GI 0-30 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-060GI 0-60 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-100GI 0-100 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-150GI 0-150 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-200GI 0-200 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-300GI 0-300 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-600GI 0-600 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-1KGI 0-1,000 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-1.5KGI 0-1,500 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-3KGI 0-3,000 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-6KGI 0-6,000 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-10KGI 0-10,000 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-15KGI 0-15,000 psig wireless pressure transmitter with 1/2 Male NPT male fitting (PX921-R required)
PX921-R Reciever/Retransmitter with 4-20 mA output (one required for each PX921 transmitter)
PX921-005GI壓力變送器 美國omega
