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| RUGGED ELECTRONIC PRESSURE CONVERTER
TYPE 443
FEATURES
4-20mA feedback
Failsafe or fail in position
High accuracy
GENERAL DESCRIPTION
The type 443 electro-pneumatic converter is designed for demanding process control applications in which stability, ruggedness and versatility are essential. It accepts a variety of analogue signal inputs, including 4-20mA, and has built-in auto/manual control facilities for
raise/lower switch or potentiometer control.
This model is an improved version of the well established
440 electro pneumatic converter with increased flexibility, convenience and ruggedisation.
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| PYSICAL |
| *Casing |
Diecast zinc alloy, grey stove enamel finish: hinged lid |
| *Mounting |
Surface mount through integral fixing holes, any orientation |
| *Pneumatic connections |
1/4” NPT |
| *Electrical connections |
Via cable glands to 16mm Klippon terminal block |
*Controls
Trimpots
Switches
Relay
LED’s |
Span, zero (control and feedback),response rate
Signal failfreeze or instrument fail safe. Input signal selection. Auto/Manual select (biased Auto). Raise/lower switches. Remote/Manual
switches or potentiometer select.
Power/signal/Auto isolated contact
pair in relay. Contact rating -50VA. Indicates if converter is in auto
condition, and valid control and power present.
Indicates power control signal present, and out-of-balance signal difference between auto and manual signals. |
| *Vibration |
No effect |
| *Weight |
2.3Kg |
| *IP. Rating |
IP65 |
*Temperature Stability
(span/zero) |
-5°C to +45°C ±0.03%/°C FS change
-10°C to +60°C ±0.05%/°C FS change |
*Electromagnetic
Compatibility |
Compliant with the requirements of the EMC directive, assessed against. BS EN50082-2: 1995,BS EN50081-2: 1994. ±4% FS susceptibility observed under all test conditions when screened cable is used connected both at source and instrument ends. CE marked. |
| ACCURACY |
| *Output Signal |
Outlet pressure min: 3bar(0.2psig); max; less than 7bar (100psig) |
| *Air Supply |
Up to 100psig (7bar). Dry, non corrosive air filtered to 5microns |
| *Flow Capacity |
Up to 280Nl/min |
| *Air Consumption |
Low pressure - 0.2l/min typical
High pressure - 0.4l/min typical |
*Response Time
(adjustable over
approx 10:1 range) |
10-90% or 90-10% FS step: 5 sec
max ±10% change 2 sec max |
| *Linearity |
± 0.5% FS |
| *Total Error |
±0.5% of span typical, independent error (combined effect of hysteresis, deadzone and repeatability) |
| *Stability (6 months) |
0.25%(span/zero) |
| *Failfreeze stability |
<±-2% setpoint/hour |
| Note: |
Instrument performance is guaranteed within the band 5 to 95% of range. Performance variations may exist outside this range. |
| ELECTRICAL
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| *Supply Voltage |
24V ± 20%d.c.100mA |
| *Input Signal |
4-20mA, 1-5V, 2-10V (selected by switch and connection) |
*Input Common Mode
Voltage Limit |
0 to +5V max (control I/p -ve to supply -ve) |
| *Input impedance |
4-20mA 250W; 1-5V, 2-10V: 10kW |
| *Feedback Signal |
4-20mA (o/p voltage 12V max) |
| *Note |
Voltage feedback obtainable via load resistor. |
| *LED signal |
1-5V: 250W; 2-10V: 500W |
| *External potentiometer |
Nominal 10mA drives for out-of balance LEDs |
*External raise/lower/
auto manual switches |
Nominally 1kW ± 50W |
