Modell SET-204
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Setra’s Model 204 pressure transducers are intended for accurate pressure measurements of gas or liquid media compatible with 17-4 PH and 15-5 PH stainless steels. The high level output signal and excellent stability, combined with fast dynamic response, make this unit ideal for industrial, laboratory and aerospace applications.
The exceptional accuracy is achieved by combining Setra’s unique electronic circuitry with its field proven variable capacitance sensor. This unit is compensated for both zero and sensitivity shifts due to environmental temperature variations. The Model 204, with a high-level voltage output or current output, require no additional signal conditioning. The sensor features a one-piece 17-4 PH or 15-5 PH stainless steel pressure sensor and an insulated electrode, which form a variable capacitor. As the pressure increases, the capacitance decreases. This change in capacitance is detected and converted to a linear DC electric signal. On absolute pressure units, the reference side of the diaphragm is sealed by electron beam welding under high vacuum.
| Spezifikationen | |||
|---|---|---|---|
| Performance Data | |||
| Accuracy RSS (at constant temperature) | ±0.11% FS ±0.14% for 10,000 PSIG | [1] | |
| Non-Linearity (BFSL) | ±0.07% FS | ||
| Hysteresis | 0.08% FS 0.1% for 10,000 PSIG | ||
| Non-Repeatability | 0.02% FS | ||
| Thermal Effects[2] | |||
| Compensated Range | -1 to +65°C | ||
| Zero Shift | <±0.36 %FS/50°C | [3] | |
| Span Shift | <±0.27 %FS/50°C | ||
| Static Acceleration Effect | <0.05 PSI/G (Typ.) (Pressure Port Axis) | ||
| Volume Increase Due to FS Pressure | 5 x 10-5 cu. in. | ||
| Warm-Up Shift | ±0.5% Total (±0.1% Residual Shift after 5 Minutes) | ||
| Physical Description | |||
| Pressure Fitting | 1/4" - 18 NPT Internal | ||
| Electrical | Connection 2 ft. Multiconductor Cable | ||
| Weight | 10 Ounces | ||
| Environmental Data | |||
| Operating Temperature | -18 to +80°C | ||
| Storage Temperature | -55 to +120°C | ||
| Vibration | 2g from 5 Hz to 500 Hz | ||
| Shock | 50g | ||
| Acceleration | 10g Maximum | ||
| Electrical Data (Voltage Output) | |||
| Circuit | 4-Wire (+Exc, -Exc, +Out, -Out) | ||
| Excitation | 22 to 30 VDC, 24 VDC (Normal) Reverse Excitation Protected | ||
| Output | 0 to 5 VDC STD, see ordering information for more options | [4][5] | |
| Power Consumption | 10 mA (0.25 Watts) | ||
| Output Impedance | <10 Ohms | ||
| Output Noise | <100 Microvolts RMS (0 Hz to 10 KHz) | ||
| Electrical Data (Current Output) | |||
| Circuit | 2-Wire | ||
| Output | 4 to 20 mA | [6][7] | |
| External Load | 0 to 1000 Ohms | ||
| Minimum Supply Voltage (VDC) | 17 + 0.02 x (Resistance of receiver plus line) | ||
| Maximum Supply Voltage (VDC) | 42 + 0.004 x (Resistance of receiver plus line) | ||
| Effect of Power Supply: Variations | <0.003mA/Volt | ||
| Effect of Power Supply: Output Noise | <10 Microamperes RMS (0 HZ to 10 KHz) | ||
| Hinweise | |||
|---|---|---|---|
| [1] | RSS of Non-Linearity, Hysteresis and Non-Repeatability | ||
| [2] | Units calibrated at nominal 70°F | ||
| [3] | Approximately 50% higher for 0-14.7 psiv range | ||
| [4] | Calibrated into 50K ohm load. Operable into 5000 ohms or greater. | ||
| [5] | Zero output factory set to within ±10mV. Span (Full Span) output factory set to within ±10mV. Note: Both output leads are normally 1.6 VDC above the negative excitation lead at zero pressure. Either negative excitation or negative output should be connected to case (ground). But both leads cannot be connected to case (ground). Unit is calibrated at the factory with the negative excitation connected to case (ground.) | ||
| [6] | Calibrated at factory with a 24 VDC loop supply voltage and a 250 ohm load. | ||
| [7] | Zero output factory set within ±0.03mA. Span (Full Span) output factory set to within ±0.03mA. | ||
