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8 ■ User’s Manual Watlow Series 142
automatic power reset — A feature in latching limit
controllers that does not recognize power outage as a limit
condition. When power is restored, the output is re-ener-
gized automatically, as long as the temperature is within
limits.
electrical noise immunity — Ability of a temperature
control to operate normally in the presence of electrical
noise interference.
fixed set point — Temperature set point is preset at the
factory. It cannot be readjusted in the field.
latched output — Limit control output latches in de-
energized condition when overtemperature condition
occurs and cannot be reset unless temperature drops
below set point.
limit or limit controller — A highly reliable, discrete
safety device (redundant to the primary controller) that
monitors and limits the temperature of the process or a
point in the process. When temperature exceeds or falls
below the limit set point, the limit controller interrupts
power through the load circuit. A limit controller can pro-
tect equipment and people when it is correctly installed
with its own power supply, power lines, switch and sensor.
manual reset — A feature on a limit controller that
requires human intervention to return the limit to normal
operation after a limit condition has occurred.
safety limit — An automatic limit intended for use in
applications where an over-temperature fault may cause a
fire.
• Call or fax Customer Service for a Return Material
Authorization (RMA) number before returning a con-
troller.
• Put the RMA number on the shipping label, and also on
a description of the problem.
• 20% of net price restocking charge applies to all stan-
dard units returned to stock.
If you encounter a problem with your Watlow con-
troller, review all of your configuration information to verify
that your selections are consistent with your application:
inputs; outputs; alarms; limits; etc. If the problem persists
after checking the above, you can get technical support by
dialing +1 (507) 492-5300, 7 a.m. to 7 p.m. Central
Standard Time. An applications engineer will discuss your
application with you.
Please have the following information available
when calling:
• Complete model number • Serial Number
• All configuration information • User’s Manual
The Watlow Series 142 is warranted to be free of
defects in material and workmanship for 36 months after
delivery to the first purchaser for use, providing that the
units have not been misapplied. Since Watlow has no con-
trol over their use, and sometimes misuse, we cannot
guarantee against failure. Watlow's obligations hereun-
der, at Watlow's option, are limited to replacement, repair
or refund of purchase price, and parts which upon exami-
nation prove to be defective within the warranty period
specified. This warranty does not apply to damage result-
ing from transportation, alteration, misuse, or abuse.
Your comments or suggestions on this manual are
welcome. Please send them to: Technical Writer, Watlow
Controls, 1241 Bundy Boulevard, P.O. Box 5580, Winona,
Minnesota 55987-5580; phone: +1 (507) 454-5300; fax: +1
(507) 452-4507. The Series 142 User’s Manual is copy-
righted by Watlow Winona, Inc., © 2001, with all rights
reserved. (2209)
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