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Chapter 1 Introduction Series 24-HP Instruction Manual
1-6 IM-24-HP
As shown in Figure 1-3, Innova-Mass™ meters exhibit a constant Strou-
hal number across a large range of Reynolds numbers, indicating a con-
sistent linear output over a wide range of flows and fluid types. Below
this linear range, the intelligent electronics in Innova-Mass automatically
corrects for the variation in the Strouhal number with the Reynolds num-
ber. The meter’s smart electronics corrects for this non-linearity via its
simultaneous measurements of the process fluid temperature and pres-
sure. This data is then used to calculate the Reynolds number in real
time. Innova-Mass meters automatically correct down to a Reynolds
number of 5,000.
0.3
0.2
0.1
0.0
3 4
10
Linear range
Reynolds Number, Re
Strouhal Number, St
10
5
10 10
8
10
6
10
7
5000
Corrected range
Figure 1-3. Reynolds Number Range for the Innova-Mass
Temperature Measurement
Innova-Mass Flow Meters use a 1000 ohm platinum resistance temperature
detector (PRTD) to measure fluid temperature.