Watlow Optimizing Your Process System with the Series 988 Controller - Manual (Page 59)

Optimizing Your Process System with the WATLOW Series 988
How to Choose the Right 988 to Fit Your Application
7.2
Step 1: Overview
A. Describe the process that the 988 will control.
B. What raw materials go into the process?
C. What product does the process create?
D. List the sensors, switches and controls used in
the process.
E. List the heaters, motors, valves and other devices
used in the process.
F. List ambient conditions, performance require-
ments and safety concerns involving the process.
G. Make a rough sketch of the process including all
of the elements listed above. Be sure to label all of
the parts.
HELPFUL REFERENCES
Chapter 1, Test Drives,
provides diagrams and explana-
tions of several different types of
applications.
Chapter 2, Basic Control Strate-
gies and Terms, explains the
basic concepts and vocabulary of
control applications.
TL W WA
PROCESS
L1 L2 L3 L4
DEV
% OUT DISPLAY
MODE
AUTO
MAN
SERIES 988
input 2
input 1
input 3 output 4
output 3
output 2
output 1