Instruction Manual

Series 145
User’s Manual
Temperature Limit
1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580
Phone: [phone], Fax: [phone], Internet: http://www.watlow.com
The Watlow Series 145 is a 1/16 DIN temperature limit
controller with a thermocouple or RTD sensor input. The
1/16 DIN case features a front panel that provides the
Series 145 with water and corrosion resistance.
The Series 145 is designed to meet the needs of a wide
range of safety applications. It is available with a wide
variety of thermocouple and RTD ranges.
The compact size of the limit allows more flexibility in
applications where space is a problem. The Series 145 has a
standard integral setpot and a front panel LED output
status indicator.
(1927)
Control Mode
• High or low limit, factory selectable
• Manual or automatic reset on power loss, factory selectable
• Latching alarm with manual reset on over or under temperature
Operator Interface
• Sealed membrane front panel
• Integral set point
• Dual temperature scale (°F and °C)
• LED indication of output status
• Dial scale calibrated to compensate for sensor
non-linearities
• Integral reset switch
Input
• Thermocouple or RTD available
• Thermocouple with automatic cold junction compensation
• Thermocouple may be isolated or grounded
• 2- or 3-wire RTD input, platinum 100Ω, 500Ω, or 1000Ω @ 0°C
calibrated for DIN 0.003850Ω/Ω °C curve
• Sensor break protection de-energizes output
Output
• Electromechanical relay, 3A, Form C, SPDT: 3A @ 240V~, 3A @
28VÎ (dc), resistive, 275VA pilot duty rated
Accuracy
Adjustable Set Point
• Calibration accuracy: ±1% of span, at 77°F ±5°F (25°C ± 3°C)
ambient and rated line voltage ± 1%
• Set point accuracy: ±3% of dial scale
• Accuracy span: 1000°F (540°C) minimum
Fixed Set Point
• Calibration accuracy: ±10°F/±6°C of setting, at 77°F ±5°F (25°C
±3°C) ambient and rated line voltage ±1%
Temperature Stability
• Thermocouple: Typically 5µV/°F ambient (9µV/°C ambient) input
referenced
• RTD: Typically 0.2°F/°F ambient (0.2°C/°C ambient)
Voltage Stability
• ±0.01% of span (min span of 1000°F or 540°C) per % of rated line
voltage
Agency Approvals
• CE: EN61010 - Safety
EN61326 - Industrial Immunity, Class B Emissions
Installation Category 2, Pollution Degree 2
• 873, File #E43684
• to C22.2 No. 24, File #E43684
• Approved for use in commercial cooking applications
• FM Class 3545, File #J.I.3008516
Terminals
• Screw clamp terminal: 12-26 gauge wire
Power
• 120V~, +10%/-15%, 50/60 Hz
• 230V~ to 240~, +10%/-15%, 50/60 Hz
• 10VA maximum power
Operating Environment
• 32 to 131°F (0 to 55°C)
• 0 to 90% RH, non-condensing
• Storage temperature: -4 to 185°F (-20 to 85°C)
Dimensions
• Height: 2.1 in (55 mm)
• Width: 2.1 in (55 mm)
• Depth: 4.0 in (102 mm)
• Behind panel: 3.50 in (89 mm)
• Front panel: 0.5 in (13 mm)
Weight
• 0.7 lb (0.3 kg)
UL
®
is a registered trademark of Underwriter’s Laboratories, Inc.
Note: Specifications subject to change without notice.
Specifications
General Description
$5.00 Made in the U.S.A.
Printed on Recycled Paper
10% Postconsumer Waste
0600-0004-0009 Rev C
August 2000
Supersedes: 0600-0004-0009 Rev B
Registered Company
Winona, Minnesota USA
TOTAL
3 Year Warranty