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Series 220/221 Instruction Manual Chapter 1 Introduction
IM-22 1-1
Chapter 1 Introduction
Innova-Flo™ Vortex Flow Meters
The Sierra Instruments’ Series 220 In-Line and the Series 221 Insertion
Innova-Flo™ Vortex Flow Meters provide a reliable solution for process
flow measurement. From a single entry point in the pipeline, Innova-Flo
meters offer precise measurements of mass or volumetric flow. The ve-
locity sensor reduces the effects of pipeline vibration by incorporating a
unique piezoelectric element that senses the vortex frequency. To extend
rangeability at the low end of flow, the meter’s smart electronics calcu-
lates the Reynolds number (Re) based on constant values of fluid density
and viscosity stored in memory and automatically corrects for any non-
linearity down to Re = 5,000.
Innova-Flo digital electronics allows reconfiguration for most gases, liq-
uids and steam. The instrument is loop powered (12 to 36 VDC) with
two output signals. The pulse output signal is proportional to volumetric
flow rate; the analog linear 4-20 mA signal offers your choice of volu-
metric flow rate or mass flow rate. The mass flow rate is based on a con-
stant value for fluid density stored in the instrument’s memory. The local
keypad/display provides instantaneous flow rate in engineering units or
totalized flow.
The Sierra Series 220 and 221 Innova-Flo Meters simple installation
combines with an easy-to-use interface that provides quick set up, long
term reliability and accurate flow measurement over a wide range of
flows and conditions.
Using This Manual
This manual provides the information needed to install and operate the
Series 220 In-Line and Series 221 Insertion Innova-Flo Vortex Flow Me-
ters. The four chapters of this manual cover these areas:
• Chapter 1 includes the introduction and product description
• Chapter 2 provides information needed for installation
• Chapter 3 describes system operation and programming
• Chapter 4 covers troubleshooting and repair
The product specifications are found in Appendix A. Appendix B con-
tains a glossary of terms.