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Series 830/840/860 Instruction Manual Chapter 1 Introduction
IM-83/84/86-H 1-1
Chapter 1 Introduction
Sierra’s Side-Trak
™
and Auto-Trak
™
mass flow meters and con-
trollers are designed to accurately measure and control flows of
process gases. This instruction manual covers the installation, op-
eration and maintenance of the entire Side-Trak and Auto-Trak
product lines, which include the following Sierra models:
• 830 Side-Trak Mass Flow Meter
• 840 Side-Trak Mass Flow Controller
• 860M Auto-Trak Mass Flow Meter with RS-485 interface
• 860C Auto-Trak Mass Flow Controller with RS-485 interface
Sierra’s mass flow meters and controllers offer a broad range of sizes,
control electronics, process connections, cables and connectors for
flexibility and versatility. The meter’s patented straight sensor tube
with access ports permits easy cleaning and reduces maintenance
down-time. The platinum sensor eliminates zero-drift and ensures
long-term repeatability. The primary standard calibration ensures
starting point accuracy and NIST traceability. All wetted surfaces are
constructed of 316 stainless steel with Viton
®
seals standard. Control-
lers incorporate either an electromagnetic valve (up to 500 slpm) or a
motor-operated rotary valve (100 slpm to 200 scfm). The Auto-Trak
860 digital microprocessor features automatic bridge-balancing cir-
cuitry and provides simultaneous analog and digital RS-485 commu-
nication.
Using This Manual
This manual is organized into five chapters:
• Chapter 1 includes the introduction and theory of operation
• Chapter 2 provides installation and wiring instructions
• Chapter 3 describes system operation and controller features
• Chapter 4 covers maintenance and calibration procedures
• Chapter 5 provides troubleshooting advice
Gas tables and conversion formulas are found in Appendix A. The
product specifications and dimensional drawings are found in Ap-
pendix B.
The Model 860 Auto-Trak RS-485 communications program in-
cludes an “Auto-Net” Software Addendum as a supplement to this
manual. Please refer to this addendum for all RS-485 operating in-
structions.