172-65639M-01 (EF200) 13 Apr 2018
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6.1.6 Performance Characteristics
Reference operating
conditions
Error limits following ISO/DIN 11631:
•
20 to 30 °C
•
0.2 to 0.4 MPa (2 to 4 bar)
•
Calibration rig traced to national standards.
Maximum Measured
error
•
Volume flow (liquid):
±
0.75% o.r. for Re > 20,000
±
10% o.r. for 5,000
≤ Re ≤ 20,000
•
Volume flow (gas/steam):
±
1% o.r. for Re > 20,000
±
10% o.r. for 5,000
≤ Re ≤ 20,000
•
Temperature
±
1 °C (T > 100 °C, saturated steam);
Rise time 50% (agitated under water, following IEC
60751): 8 seconds
•
Mass flow (saturated steam):
– For flow velocities v 20 to 50 m/s, T > 150 °C (423 K)
±
1.7% o.r. for Re > 20,000
±
10% o.r. for 5,000
≤ Re ≤ 20,000
– For flow velocities v 10 to 70 m/s, T > 140 °C (413 K)
±
2.0% o.r. for Re > 20,000
±
10% o.r. for 5,000
≤ Re ≤ 20,000
•
Mass flow (other fluids):
Depends on the pressure value. An individual error
observation must be carried out.
o.r. = of reading Re = Reynolds number
Repeatability
±
0.2% o.r. (of reading)
Environment
Ambient Temperature
Range
•
Compact Version: -40 to +80 °C
Display can be read between -20 °C and +60 °C
•
Remote Version – Sensor: -40 to +80 °C
Display can be read between -20 °C and +60 °C
Caution!
When mounting outside, TLV recommends to protect the
device from direct sunlight with a sunshade (optional part),
especially in warmer climates with high ambient
temperatures.
Storage Temperature
-40 to +80 °C
Protection Class
IP 66/67, type 4X enclosure
Vibration Resistance
Acceleration up to 2 g, 10 to 500 Hz, following IEC 60068-2-6
Electromagnetic
Compatibility (EMC)
To EN 61326 and NAMUR Recommendation NE 21
Process
Medium Temperature
Range
•
DSC sensor (digital switched capacitor), capacitive
sensor: -200 to +400 °C
•
Gaskets:
Graphite: -200 to +400 °C
Viton (optional): -15 to +175 °C
Kalrez (optional): -20 to +275 °C
Gylon (PTFE) (optional): -200 to +260 °C
Caution!
