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1 ■ Watlow Series 146 User’s Manual
Series 146
User’s Manual
Temperature Regulator
1241 Bundy Boulevard, P.O. Box 5580, Winona, Minnesota USA 55987-5580
Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507, Internet: http://www.watlow.com
Registered Company
Winona, Minnesota USA
TOTAL
3 Year Warranty
CUSTOMER
SATISFACTION
$5.00 Made in the U.S.A.
0600-0004-0010 Rev D
December 2001
Supersedes: 0600-0004-0010 Rev C
(2089)
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
• Internal and/or customer supplied external reset switch
Operator Interface
• LED indication of output status
• Dial scale calibrated to compensate for sensor
non-linearities
• Integral or remote set point
• Dual temperature scale (°C and °F)
• Fixed set point
• Manufactured to specified value
Input
• Thermocouple or platinum RTD available
• Thermocouple with automatic cold junction compensation
• Thermocouple may be isolated or grounded
• Thermocouple and RTD break protection de-energizes output
• 2- or 3-wire RTD input, 100Ω @ 0°C calibrated for 0.003850Ω/Ω
°C curve
Output
• Electromechanical relay, 8A, Form C, SPDT: 8A @ 240VÅ resis-
tive, 8A @ 28VÎ (dc) resistive, 275VA pilot duty rated
Accuracy
Adjustable Set Point, integral or remote
• Calibration accuracy: ±1% of span, at 25°C ± 3°C (77°F ±5°F)
ambient and rated line voltage ± 1%
• Set point accuracy: ±3% of dial scale
• Accuracy span: 540°C (1000°F) minimum
Fixed Set Point
• Calibration accuracy: ±6°C/±10°F of setting, at 25°C ±3°C (77°F
±5°F) ambient and rated line voltage ±1%
Temperature Stability
• Thermocouple: Typically 9µV/°C ambient (5µV/°F ambient) input
referenced
• RTD: Typically 0.2°C/°C ambient (0.2°F/°F ambient)
Voltage Stability
• ±0.01% of span (min. span of 540°C or 1000°F) 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. 3007307
Terminals
• Captive screw, cage clamp connection, 4 mm (0.155 in.) max.
width screwdriver blade, 30 to 14-gauge wire
Mounting
• DIN rail, DIN EN50022, 35 mm x 7.5 mm
• Sub-panel flush mounting
Power
• 24V~, +10%/-15%, 50/60 Hz
• 120V~, +10%/-15%, 50/60 Hz
• 230V~ to 240~, +10%/-15%, 50/60 Hz
• 10VA maximum power
Operating Environment
• 0 to 55°C (32 to 131°F)
• 0 to 90% RH, non-condensing
• Storage temperature: -20 to 85°C (-4 to 185°F)
Dimensions
• Width: 60 mm (2.28 in)
• Height: 115 mm (4.45 in)
• Depth: 100 mm (3.89 in)
Weight
• 0.3kg (0.7 lb.)
UL
®
is a registered trademark of Underwriter’s Laboratories, Inc.
Note: Specifications subject to change without notice.
Specifications
The Watlow Series 146 is a DIN rail mount, tempera-
ture regulating controller with a thermocouple or RTD
sensor input. The DIN rail mounting offers quick and easy
installation with the use of simple hand tools. The con-
troller may also be flush mounted.
The Series 146 is designed to meet the needs of a
wide range of safety applications. Factory selectable
options include high or low control mode with either
manual or automatic reset on power loss.
The Series 146 has an LED for output status
indication and can be ordered with an integral or remote
adjustable set point, or a fixed set point.
General Description