Watlow CLS200 - Manual (Page 236)

Glossary CLS200 Series User’s Guide
220 Watlow Anafaze Doc.# 0600-3050-2000
U
Upscale Break Protection
A form of break detection for burned-out ther-
mocouples. Signals the operator that the ther-
mocouple has burned out.
Undershoot
The amount by which a process variable falls
below the setpoint before it stabilizes.
V
Volt (V)
The unit of measure for electrical potential,
voltage or electromotive force (EMF). See also
Voltage.
Voltage (V)
The difference in electrical potential between
two points in a circuit. It’s the push or pres-
sure behind current flow through a circuit.
One volt (V) is the difference in potential
required to move one coulomb of charge
between two points in a circuit, consuming one
joule of energy. In other words, one volt (V) is
equal to one ampere of current (I) flowing
through one ohm of resistance (R), or V = IR.
Z
Zero Cross
Action that provides output switching only at
or near the zero-voltage crossing points of the
ac sine wave.