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PX921-150GI压力变送器 美国omega
蓝宝石上硅无线压力变送器，长期可靠性
PX921
蓝宝石上硅传感器保证了高的稳定性和可重复性
低功率无线电发射机内置的范围可达500英尺
12位高精度
不需要许可
IP65/NEMA 4不锈钢阀体
固态可靠性
高冲击和振动
欧米茄的px921系列无线发射器的设计安全运行在恶劣的工业安装无硬接线的需要！该px921通过无线电遥测。低功率射频发射器的安全传输信号到500英尺接收器/转发器，它转换成一个4-20毫安信号。坚固的不锈钢结构特点S.O.S.技术与定制集成电路放大器给px921系列高稳定，低漂移和寿命长。SOS建设使用非常稳定的固态硅应变计在蓝宝石载体为玻璃键合到一个钛膜。这种组合提供了一个非常耐用的传感器已在很宽的温度范围内具有良好的稳定性。此外，钛膜与不锈钢接触部分提供zui大的耐久性和耐腐蚀性，恶劣的工业化学品。
规格
(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 emetry 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.
注释: Metric Ranges Available - Consult Engineering
产品型号/产品描述
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)
PX921-150GI压力变送器 美国omega
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