Endress+Hauser HART Proline Promass 83, Руководство по эксплуатации

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Technical data Proline Promass 83
134 Hauser
Special mounting instructions
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19.
Limiting flow See the "Measuring range" section
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106.
Select nominal diameter by optimizing between required flow range and permissible
pressure loss. See the "Measuring range" section for a list of max. possible full scale values.
• The minimum recommended full scale value is approx. 1/20 of the max. full scale value.
• In most applications, 20 to 50% of the maximum full scale value can be considered ideal.
• Select a lower full scale value for abrasive substances such as liquids with entrained solids
(flow velocity < 1 m/s (3 ft/s)).
• For gas measurement the following rules apply:
– Flow velocity in the measuring tubes should not be more than half the sonic velocity
(0.5 Mach).
– The maximum mass flow depends on the density of the gas: formula
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108
Pressure loss To calculate the pressure loss, use the Applicator sizing tool (
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85).