Series 760S/780S UHP Instruction Manual
Chapter 1 Introduction
IM-76S-78S-UHP-B
1-1
Chapter 1 Introduction
Series 760S/780S UHP Mass Flow Meters
Sierra’s Series 760S/780S UHP Smart Mass Flow Meters provide
a reliable solution for monitoring ultra-clean gas mass flow rates.
Low-flow sensitivity, fast response and outstanding rangeability
have made these models the instruments of choice for many critical
gas flow applications.
Ultra high purity meters are constructed of 316L electro-polished,
stainless-steel tubing with a 7-10 Ra (UHP) or 20-25 Ra (HP) interior
finish. The Series 780S meter has a built-in flow conditioner which
eliminates velocity-profile distortions caused by upstream disturbances.
The 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. Both the Series 780S and the Series
760S meters are equipped with the rugged Steel-Trak
™
sensor that
automatically corrects for changes in gas temperature and pressure.
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.
Series 760S/780S UHP Mass Flow Meters offer simple installation
combined with an easy-to-use interface that provides quick set up,
long term reliability and accurate high-purity mass flow measure-
ment over a wide range of flows and conditions.
Using This Manual
This manual provides the information you need to install and operate
Series 760S and 780S UHP Mass Flow Meters. 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.