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Series 780S Instruction Manual Chapter 1 Introduction
IM-78S-B 1-1
Chapter 1 Introduction
Series 780S Flat-Trak
™
Mass Flow Meters
Sierra’s Series 780S Flat-Trak Mass Flow Meter provides a reliable
solution for monitoring gas mass flow rate. Low-flow sensitivity,
fast response and outstanding rangeability have made this model the
instrument of choice for many critical gas flow applications. The
Series 780S meter solves the problems associated with monitoring
flow in installations where long runs of straight pipe are not avail-
able. The instrument’s built-in flow conditioner creates a uniform
velocity profile by means of two stainless-steel perforated plates
welded into the body between the sensor and the inlet connection.
With flow conditioning, upstream piping requirements are reduced
to less than three diameters after most common flow disturbances.
The flow meter’s versatile microprocessor-based transmitter integrates
the functions of flow-range adjustment, meter validation and diagnos-
tics in a probe-mounted or remotely mounted housing. Mass flow rate
and totalized flow, as well as other configuration variables are dis-
played on the meter’s optional LCD display. The meter provides an
optical/galvanic isolated flow output, two alarm outputs and one con-
tact input for range or gas selection. The programmable transmitter is
easily configured via RS-232 and Sierra’s Smart Interface
™
software
or through three push buttons built into the device.
The Series 780S Mass Flow Meter’s simple installation combines
with an easy-to-use interface that provides quick set up, long term
reliability and accurate mass flow measurement over a wide range of
flows and conditions.
Using This Manual
This manual provides the information you need to install and operate
the Series 780S Mass Flow Meter. The four chapters of this manual
cover the following areas:
• Chapter 1 includes the introduction and product description
• Chapter 2 provides installation and wiring instructions
• Chapter 3 describes system operation and programming
• Chapter 4 covers troubleshooting and repair
The product specifications are found in Appendix A.