
1 ■Watlow Series 146 User’s Manual
Series 146User’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 @ 240VÅresis-
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 .