TROUBLESHOOTING MT100 Multipoint Flow Meter
Verify Standard vs. Actual Process Conditions
The flow meter measures the mass flow rate. The mass flow rate is the mass of the gas flowing through a pipe per time. Other flow meters,
such as an orifice plate or a pitot tube, measure the volumetric flow rate. The volumetric flow rate is the volume of gas per time. If the
readings displayed do not agree with another instrument, some calculations may be necessary before comparing them. To calculate the
mass flow rate and the volumetric flow rate the pressure and temperature at the point of measurement must be known. Use the following
equation to calculate the mass flow rate (Standard Volumetric Flow rate) for the other instrument.
Equation:
Where:
Q
A
= Volumetric Flow Q
S
= Standard Volumetric Flow
P
A
= Actual Pressure T
A
= Actual Temperature
P
S
= Standard Pressure T
S
= Standard Temperature
Pressure in PSIA and Temperature is in degrees Rankine
Example:
Fluid Components International LLC 88
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