Setra Systems

217 Ultra High Purity Pressure Transducer

Ideal for applications that require exceptional insensitivity to environmental extremes

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Setra's Model 217 is designed for modular "Block" gas sticks and panels. The 217 is ideal for pressure measurement applications that require exceptional insensitivity to environmental extremes, such as temperature transients resulting from the flow of cold gas.

The Model 217, available with a C-Seal or W-seal down-mount pressure port, has a small swept sensor chamber for easy purgeability. All wetted parts are 316L VIM/VAR stainless steel passivated to 5 Ra (7 Ra. max.) finish, which eliminates surface irregularities and provides the proper surface chemistry for corrosion resistance, assuring contaminant-free gas distribution. Every sensor is mass spectrometer helium leak tested to 1 x 10-9 atm.cc/sec.

The top external zero and span adjustments complete this unique design for all UHP down-mount applications. Setra's patented variable capacitance sensor features a 316L stainless steel diaphragm and an insulated electrode plate. A variable capacitor is formed between the sensor body and the electrode plate. An increase in pressure causes a slight rounding of the diaphragm, which decreases the capacitance. The capacitance change is detected and converted to a highly accurate linear DC electric signal by Setra's unique custom integrated circuit, utilizing a patented charge balance principle. Setra’s entire Ultra-High Purity series is based on Setra's proven capacitive sensing technology with highly accurate and stable voltage or current output signals that are virtually EMI/RFI immune.
 

Performance Data

Accuracy RSS* (at constant temp) ±0.25% FS or
 ±1.0% Reading
Non-Linearity, BFSL ±0.15% FS
Hysteresis 0.20% FS
Non-Repeatability 0.02% FS
Thermal Effects**  
Compensated Range °F(°C) +15 to +150 (-9 to +65)
Zero Shift %FS/100°F(50°C) 2.0 (1.8)
Span Shift %FS/100°F(50°C) 2.0 (1.8)

*RSS of Non-Linearity, Non-Repeatability and Hysteresis. **Units calibrated at nominal 70°F. Maximum thermal error computed from this datum.

Environmental Data

Temperature Operating* °F (°C) -40 to +185 (-40 to +85) Storage °F (°C) -40 to +185 (-40 to +85)

Current Unit Ordered w/Option N1 Operating °F (°C) -22 to +176 (-30 to +80) Storage °F (°C) -22 to +176 (-30 to +80)

*Operating temperature limits of the electronics only. Pressure media temperatures may be considerably higher or lower.

Physical Description

Case Stainless Steel
Electrical Connection 6ft. Multiconductor Cable, Bayonet
 or D-sub Connector
Pressure Fitting Down Mount “C” Seal or “W” Seal
Vent Through Zero and Span Access Screws
Weight 6.5 oz (184g)

Electrical Data (Voltage)

Circuit 3-Wire (Exc, Out, Com) Excitation 10 to 30 VDC for 5V FSO 13 to 30 VDC for 10V FSO Output* 0 to 5VDC or 0.2 to 5.2 VDC** 0 to 10VDC or 0.2 to 10.2 VDC ** Current Consumption <8 mA *Calibrated into a 50K ohm load, operable into a 5000 ohm load or greater. **Zero output factory set to within ±25mV (for 5 VDC output) or ±50mV (for 10 VDC output). **Span (Full Scale) output factory set to within ±25mV (for 5 VDC output) or ±50mV (for 10 VDC output).

Specifications subject to change without notice.

Electrical Data (Current)

Circuit 2-Wire
Output* 4 to 20 mA**
External Load 0 to 800 ohms

Minimum supply voltage (VDC) = 10 + 0.02 x (Resistance of receiver plus line). Maximum supply voltage (VDC) = 30 + 0.004 x (Resistance of receiver plus line).

*Calibrated at factory with a 24 VDC loop supply voltage and a 250 ohm load. **Zero output factory set to within ±.08mA. **Span (Full Scale) output factory set to within ±.08mA.

Pressure Media

Liquids or gases compatible with 316L Stainless Steel.

Approvals

Non-Incendive: Certified for use in potentially hazardous locations:

North America: Optional UL 1604 approval available for units ordered with 4 to 20 mA current output. (Select N1 Option)

Europe: Optional ATEX 94/9/EC approval available for units ordered with 4 to 20 mA current output. (Select N1 Option)

• Modular “Block” Gas Sticks and Panels
• High Purity Gas Delivery Systems
• Semiconductor Process Tools

  • Thumbnail of document Setra Model 217 Data Sheet 75
    Download

    Setra Model 217 Data Sheet 75

    Download
  • Thumbnail of document Setra Model 217 Operating Instructions 76
    Download

    Setra Model 217 Operating Instructions 76

    Download

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