Emerson Rosemount 8600 Series - Calculating Output Variables with Known Input Frequency

Reference Manual
00809-0100-4860, Rev BF
Electronics Verification
May 2019
108
Rosemount 8600 Vortex Flow Meter
Figure C-2. Test Frequency Output and Chassis Ground Points.
C.2.5 Calculating output variables with known input frequency
Use the following equations with a known input frequency for verification of a flow rate or
4–20 mA output within a given calibrated range. Select the proper equation depending on
if you are verifying a flow rate, mass flow rate, 4–20 mA output, or special units. Example
calculations starting on page 110 may clarify how these equations are used.
To verify a flow rate
For a given frequency F (Hz), and K-factor (compensated), find the
flow rate Q:
where C
x
is the unit conversion (Table C-1 on page 110).
To verify a standard or normal flow rate
To verify a mass flow rate
For a given mass frequency F (Hz), and K-factor (compensated), find the mass flow rate M:
where C is the unit conversion and
 is density at operating conditions:
where C
x
is the unit conversion using density () (Table C-1 on page 110).
Ground
Test Frequency In
Test Point 1
Q F Hz  K C
x
 =
Q F Hz  DensityRatio 
 K C
x
  =
M
F
K   C
-------------------------=
M F Hz  KC
x
 =