Watlow Series 142 Retrofit - Manual (Page 51)

Watlow Series 142 User’s Manual ■ 5
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Limit Control Mode
• High limit control
• Latched manual reset with ±3°F (1.7°C) hysteresis
• Can only be reset when process temperature drops below limit set
point. Terminals are provided for remote reset in the event of an
overtemperature condition. (Reset switch supplied by user.)
On/off Temperature Control Mode
• Off — when process temperature exceeds factory-fixed or remote
adjustable set point
• On — when process temperature is less than factory-fixed or
remote adjustable set point
• Hysteresis (switching differential) ±3°F (1.7°C) nominal
Agency Approvals
• UL and C-UL, File #E43684
197 Commercial Cooking Appliances
873 Temperature Indicating and Regulating Equipment
991 Test for Safety Related Controls Employing Solid State
Devices
• A.G.A., Report #C3236001
• CE 89/336/EEC Electromagnetic Compatibility Directive
EN50082-1, Immunity
EN50081-1, Emissions
• CE 73/23/EEC Low Voltage Directive
EN60730-1, EN60730-2-9, Safety
Operator Interface
• Non-adjustable, factory-fixed or remote adjustable set point
Remote Set Point
• Dial scale calibrated to compensate for sensor non-linearity
• Dual °F/°C scales
Accuracy
• Calibration accuracy: ±1% of span, at 77°F ± 5°F (25°C ± 3°C)
ambient and rated line voltage ±1%
• Accuracy span: ±2.5% of range or 1000°F (540°C) minimum,
whichever is greater
• Thermocouple temperature stability: Typically ±5µV/°F (9µV/°C)
ambient
• Voltage stability: ±0.01% of span /% of rated line voltage
Thermocouple Input
• Grounded or ungrounded Type E, J, K or T. Sensor break protec-
tion de-energizes output.
• Factory-set, thermocouple ranges
Output
• Electromechanical relay1, SPDT, 3A @ 120/240V~ or 3A @ 30V
Î
(dc), Form C, with RC suppression on on-off temperature con-
troller version. Off-state output impedance is 20k
Ω with RC
suppression.
Output Relay Status Upon Power Restoration
(Assuming process temperature is not above set point.)
• Auto reset: Output relay automatically re-energizes
• Manual reset: Manual reset is required to re-energize output relay
Line Voltage/Power
• 120V~, ±10%; (108-132V~), 50/60Hz, ±5%
• 208/240V~, ±10%; (187-264V~), 50/60Hz, ±5%
• Power consumption 4VA maximum
Operating Environment
• 32 to 149°F (0 to 65°C)
• 0 to 90% RH, non-condensing
Storage Temperature
• -40 to 185°F (-40 to 85°C)
Terminals
• 1⁄4 inch quick connect lugs (spade/ appliance)
Dimensions
Controller
• Length
4 in. (102mm)
• Width 2.8 in. (70mm)
• Height 4.05 in. (103mm)
• Controller Weight 0.79 lb. (0.36kg)
• Shipping Weight 1.25 lbs. (0.57kg)
Set Point Assembly
• Dial Scale
3 in. sq. (76mm)
• Pot Depth Behind 1.0 in. (25mm)
• Knob Depth in Front 1.2 in. (31mm)
• Lead Length 24 in. (610mm)
• Weight 0.2 lb. (0.09kg)
1Electromechanical relays are warranted for 100,000 closures
only.
UL® is a registered trademark of Underwriter’s Laboratories, Inc.
Note: Specifications subject to change without notice.
• 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 507/494-5656, 7 AM to 7 PM Central Standard
Time, or e-mail to [email protected]. An applica-
tions 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 guar-
antee against failure. Watlow's obligations hereunder, at
Watlow's option, are limited to replacement, repair or
refund of purchase price, and parts which upon examina-
tion prove to be defective within the warranty period speci-
fied. This warranty does not apply to damage resulting
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: 507/454-5300; fax: 507/452-
4507. The Series 142 User’s Manual is copyrighted by
Watlow Winona, Inc., © August 1999, with all rights
reserved. (1816)
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