Endress+Hauser Proline Prowirl 72, Operating Instructions Manual

Page: 62 / 114

10 Technical data Proline Prowirl 72
62 E Hauser
Cable specification • Permitted temperature range: –40 °C...(max. ambient temperature plus 10 °C)
• Remote version
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Page 22
Power supply failure • Totalizer stops at the last value determined (can be configured).
• All settings are kept in the EEPROM.
• Error messages (incl. value of operated hours counter) are stored.
10.1.6 Performance characteristics
Reference operating
conditions Error limits following ISO/DIN 11631:
• 20...30 °C
• 2...4 bar
• Calibration rig traced to national standards.
• Calibration with the correlatively process connection of the accordingly norms.
Maximum measured error • Liquid:
< 0.75% o.r. for Re > 20,000
< 0.75% o.f.s for Re between 4,000...20,000
• Gas/steam:
< 1% o.r. for Re > 20,000
< 1% o.f.s for Re between 4,000...20,000
o.r. = Of reading
o.f.s = Of full scale
Re = Reynolds number
Repeatability ±0.25% o.r. (of reading)
Reaction time/
step response time If all configurable functions are set to 0, you must reckon with a reaction time/step response time
of 200 ms for vortex frequencies as of 10 Hz.
For other settings, a reaction time/step response time of 100 ms must be added to the total filter
reaction time for vortex frequencies as of 10 Hz.
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Page 99: FLOW DAMPING
Influence of ambiente tempe-
rature Current output (additional error, in reference to the span of 16 mA):
• Zero point (4 mA)
average T
k
: 0.05%/10 K, max. 0.6% over the entire temperature range –40 °C ... +80 °C
• Span (20 mA):
average T
k
: 0.05%/10 K, max. 0.6% over the entire temperature range –40 °C ... +80 °C
Digital outputs (pulse output, PFM, HART)
Due to the digital measuring signal (vortex pulse) and further digital processing, there is no
interface-related error from changing ambient temperature.
10.1.7 Operating conditions: installation
Installation instructions see Page 12 ff.
Inlet and outlet run see Page 14 ff.