Baker Hughes Masoneilan 4700P, Инструкция по эксплуатации

Страница: 61 / 66

Masoneilan 4700P/E & 4800P/E Positioners Manual | 61 © 2021 Baker Hughes Company. All rights reserved.
Table 6 - Specification Data
Item Description
Type Cam feedback, pneumatic, force balanced; electropneumatic positioner
uses current to pneumatic converter to generate pneumatic operating
signal
Action Direct: increasing signal increases output reverse: increasing signal
decreases output
Note: Reverse action is available only on the 4700P/4800P Pneumatic
Positioner
Characteristics
Linear
Equal Percentage
Custom
Maximum Air
Consumption
0.3 scf/min - 25 psig supply (4700)
0.5 scf/min - 25 psig supply (4800)
Temperature Effects
Span Error (Typical)
Temp Range (°C)
-40 to -20
-20 to +60
+60 to +85 Error
.31% per °C
.06% per °C
.11% per °C
Supply Pressure
Influence
Less than 0.25% stroke change per psi supply change
Maximum Air
Supply Rating
Dictated by actuator, but never greater than 100 psig
Connections
Pneumatic: 1/4” NPT (4700) or 3/8” (4800)
Electrical: 1/2” NPT or M20
Weight
4700P: 3.5 lbs (1.6 kg); 4800P: 4.2 lbs (1.9 kg)
4700E: 4.7 lbs (2.1 kg); 4800E: 5.3 lbs (2.4 kg)
4700P 4700E
Deadband <0.2% of span <0.5% of span
Hysteresis <0.2% of span <0.5% of span
Repeatability Within 0.2% of span Within 0.5% of span
Sensitivity Better than 0.2% of span Better than 0.3% of span
Conformity +1% of span +1% of span
Input
Resistance 4-20 mA
signal
170 Ohms nominal
Specifications