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| Type 422 Failfreeze Electronic Converter
Current to Pressure (I/P)
Features The 422 proportional I/P converter uses advanced electronic control
to achieve outstanding performance. It offers failfreeze operation in
addition to conventional I/P charactersitics and its rugged construction,
vibration immunity and weatherproofing make it ideal for field application. |
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Advanced electronic control
| Pneumatic | ||
| *Output Signal | 0.2-1bar (3-15psig) low pressure unit; 0.2-8bar (3-120psig) high pressure unit; minimum outlet pressure less than 140mbar (2psig) | |
| *Air Supply | Oil free, dry air, filtered to 5 microns; at least 0.7bar above maximum output pressure | |
| *Flow Capacity | Up to 300Nl/min (10scfm) | |
| *Air Consumption | 0.2 l/min typical (0.007scfm) low pressure ; 0.4 l/min typical (0.013scfm) high pressure | |
| *Response Time | 5 seconds (low pressure unit), 12 seconds (high pressure unit) (from 10 to 90% of output pressure into a 5 litre load) | |
| *Total Error | Max. error +/-0.25% of span (low pressure), +/-0.5% (high pressure) (typical, independent error includes the combined effect of non-linearity, hysteresis, deadzone and repeatability | |
| *Temperature Effect | Typically better than 1% span between -10°C and 60°C | |
| *Supply Sensistivity | Negligible effect | |
| *Connections | 1/4" NPT female standard (plus two integral 1/4" NPT gauge ports); others available on request | |
| Physical | ||
| *Operating Temperature | -20°C to +70°C | |
| *IP Rating | IP65 | |
| *Vibration | The unit possesses a high degree of immunity | |
| *Electromagnetic Compatibility | Compliant and CE marked in accordance with the EC E.M.C. directive. Tested to standards: BS EN50082-2: 1995, BS EN50081-2: 1994 | |
| *Material of Construction | Zinc diecasting passivated and epoxy painted, Verton glass/nylon cover; nitrile diaphragms | |
| *Mass | 800g | |
| *Mounting Position | Operation in any attitude is possible without recalibration; integral surface mounting bracket provided for vertical mounting | |
| Electrical | ||
| *Electrical Signal | 4-20mA (two wire); load presents 6 volts (+/-0.5V) constant voltage drop to the current source | |
| *Failure Mode | Signal held at previous value when input signal falls below 2mA +/-0.5mA; drift rate 0.02% in 30 seconds (mid-range) | |
| *Connections | 30mm square connector DIN 43650 provided, mountable in four directions | |
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| Certification | ||
| Hazardous area approvals: The 422 is available
with Type NllT6 approval to BS6941 1998 or Type EEx ia llCT4 approval
for intrinsically safe applications.
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Ordering Information
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Electronic I/P Converters |
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