Modell SET-280
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Setra Systems Model 280G pressure transducer is intended for low to high pressure measurements of gases or liquids in applications requiring rugged packaging, high performance and affordability. The 17-4 PH or 15-5 PH stainless steel capacitance sensing element, coupled with an IC-based circuit, assures excellent accuracy and long term stability.
The stable electronic circuit, combined with Setra’s variable capacitance sensor, results in the ultimate design simplicity. The sensor features a 17-4 PH or 15-5 PH stainless steel pressure sensor and an insulated electrode, which forms a variable capacitor. As the pressure increases, the capacitance decreases. The change in capacitance is detected and converted to a linear DC output signal.
The high level 0-5 VDC or 4-20 mA output signal requires no additional signal conditioning and results in excellent stability, accuracy and fast dynamic response, making the 280G series ideal for high performance applications.
| Spezifikationen | |||
|---|---|---|---|
| Performance Data | |||
| Accuracy RSS (at constant temperature) | ±0.11% FS | [1] | |
| Non-Linearity (BFSL) | ±0.1% FS | ||
| Hysteresis | 0.05% FS Pressure Fitting | [2] | |
| Non-Repeatability | 0.02% FS | ||
| Thermal Effects[3] | |||
| Compensated Range | 0 to +65°C | ||
| Zero/Span Shift | 1.8 %FS/50°C | ||
| Warm-Up Shift | 0.5% FS (0.1% FS residual shift after 5 minutes) | ||
| Physical Description | |||
| Case | Stainless Steel with O-Ring | ||
| Electrical Connection | 1" Edge Card with Space Lugs and Dust Boot | ||
| Pressure Fitting | 1/4" - 18 NPT Internal | ||
| Pressure Cavity | Volume 0.04 in.<sup>3</sup> | ||
| Volume Increase | 5 x 10<sup>-5</sup> in.<sup>3</sup> | ||
| Weight | 5 oz | ||
| Environmental Data | |||
| Operating Temperature | -18 to +80°C | [5] | |
| Storage Temperature | -54 to +93°C | ||
| Vibration | 2g from 5 Hz to 500 Hz | ||
| Acceleration | 10g | [6] | |
| Shock | 50g | ||
| Pressure Media | Gases or liquids compatible with 17-4 PH or 15-5 PH Stainless Steel. | [4] | |
| Electrical Data (Voltage) | |||
| Circuit | 3-Wire (+In, +Out, Com) | ||
| Excitation | 15 to 32 VDC | ||
| Output | 0 to 5 VDC | [7][8] | |
| Power Consumption | 0.25 watts (approx. 10mA at 24 VDC) | ||
| Output Impedance | 100 ohms | ||
| Output Noise | 100 microvolts RMS (0 Hz to 10 KHz) | ||
| Electrical Data (Current) | |||
| Circuit | 2-Wire | ||
| Output | 4 to 20 mA | [9][10] | |
| External Load | 0 to 800 ohms | ||
| Min. Supply Voltage (VDC) | 18 +0.02 x (Resistance of receiver plus line) | ||
| Max. Supply Voltage (VDC) | 32 + 0.004 x (Resistance of receiver plus line) | ||
| Hinweise | |||
|---|---|---|---|
| [1] | RSS of Non-Linearity, Hysteresis and Non-Repeatability. | ||
| [2] | 0.1% FS for 10,000 psi range only. | ||
| [3] | Units calibrated at nominal 70oF. Maximum thermal error is computed from this datum. | ||
| [4] | Hydrogen not recommended for use with 17-4 PH or 15-5 PH Stainless Steel. | ||
| [5] | Operating temperature limits of the electronics only. Pressure media temperatures may be considerably higher or lower. | ||
| [6] | Shift in output reading of 0.05% FS/G typical, pressure port axis only. | ||
| [7] | Calibrated into a 50K ohm load. | ||
| [8] | Zero output factory set to 30mV nominal. | ||
| [9] | Calibrated at factory with 24 VDC loop supply voltage and a 250 ohm load. | ||
| [10] | Zero output and Span FS factory set to within ±0.16mA. Span (Full Scale) output factory set to within ±0.16mA. | ||
