Aalborg PWE Digital User Manual
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2.3
PWE Flow Meter Specification
FLOW MEDIUM: Please note that PWE Flow Meters are designed to work only
with liquids. Never try to measure flow rates of dry gas.
CALIBRATIONS: Performed at standard conditions [14.7 psia (101.4 kPa) and
70 °F (21.1 °C)] unless otherwise requested or stated.
VISCOSITY: Calibrated to 1 cPoise (water). Meters can be used for fluids up to
50 cPoise with field calibration (maximum flow range may be affected).
ENVIRONMENTAL (PER IEC 664): Installation Level II; Pollution Degree II.
FLOW ACCURACY (INCLUDING LINEARITY): ±1% of FS.
REPEATABILITY: ±0.25% of full scale.
TEMPERATURE ACCURACY (INCLUDING LINEARITY)*: ±0.5 °C.
FLOW RESPONSE TIME: Approximately 1 seconds (above 10% of full scale
flow), approximately 2 seconds (below 10% of full scale flow).
MAXIMUM PRESSURE: 10 bar (150 psi).
MAXIMUM PRESSURE DROP: See Table 2.3.1 for pressure drops associated
with various models and flow rates.
FLUID AND AMBIENT TEMPERATURE: 14 °F to 140 °F (-10 °C to 60 °C).
OUTPUT SIGNALS: Linear 0-5 Vdc (3000 ohms min load impedance);
Linear 4-20 mA (500 ohms maximum loop resistance).
Maximum noise 20mV peak to peak (for 0-5 Vdc output).
Flow Pulse Output: 3.3 Vdc amplitude (3000 ohms min load impedance).
OPTICALLY ISOLATED OUTPUTS: UCE 40Vdc, ICE 150 mA.
FLOW METER INPUT POWER: 11 to 26 Vdc, 100 mV maximum peak to peak
output noise. Power consumption: +12Vdc (150 mA maximum);
+24Vdc (100 mA maximum); Circuit board have built-in polarity reversal
protection, 300mA resettable fuse provide power input protection.