Home Products Controllers Temperature and Process Controllers Watlow CF Series Temperature Controller

Watlow CF Series Temperature Controller

CF Series

The basic and limit microprocessor-based controllers from Watlow® provide an economical solution for applications requiring simple on-off control. These controllers and limits are available in a broad range of packaging options, allowing users to select the best version for their individual application. The controllers and limits are available with or without an operator interface and can be ordered in a 1/8 DIN square panel mount, DIN-rail mount or open-board design configurations.

The basic and limit design provides significant improvements in the performance, repeatability and accuracy offered by
analog basic temperature and limit controllers.

The fixed options for the SERIES CF (controller) and SERIES LF (limit) offer fixed set points and are supplied without an operator interface. Operating set point temperature values are customer definable in the product configuration part number. The SERIES TM temperature indicator is available as an additional order option.

These basic and limit controllers are UL® recognized and include CE approvals. The limit controllers are FM approved with special UL® approval for the open-board potted versions. CV and LV panel mount controllers ordered with discrete up/down cursor keys include NEMA 4X/IP65 seal protection. Watlow’s basic temperature and limit controllers include industry leading service and support and are backed by a three-year warranty.

Watlow: Your Heat Solutions Resource Brochure (EN)
Watlow: Vos Solutions de Chauffage Brochure (FR)

Back to Temperature and Process Controllers

Customize this product Buy now

Features

Specifications

Ordering information

Resources

Applications

Product Features

Fixed or adjustable set points

Provide tamper-proof operation
Offer control flexibility

Four character LED display

Improves set point selection accuracy

Multiple mounting options

Minimize installation time

Heat or cool operation

Provides application flexibility

High or low limit with auto or manual reset

Provides application flexibility

Fahrenheit or Celsius operation with indication

Offers application flexibility

Sensor break protection

Provides positive system shutdown

Agency approvals

Meet certification requirements/compliance

Microprocessor-based technology

Ensures accurate, repeatable control

Product Specifications

On-Off Controller:

Microprocessor based, on-off control mode
Nominal switching hysteresis, typically 3°F (1.7°C)
Input filter time: 1 second

Operator Interface:

Four digit, seven segment LED displays, 0.28 in. (7 mm) high
°F or °C indicator LED
Load/Alarm indicator LED
Continuous turn, velocity sensitive rotary encoder for set point adjustment
Front panel key on push for set point or push for show process options (on-off controller only)
Front panel SET/RESET key on variable set point models (limit controller only)
No operator interface on fixed set point models

Standard Conditions For Specifications:

Rated line voltage, 50 to 60Hz, 0 to 90% RH non-condensing, 15-minute warm-up
Calibration ambient range: 77°F (25°C) ±3°C

Sensor Input (Thermocouple):

Grounded or ungrounded
Type E, J, K, T thermocouple types
>10 MΩ input impedance
250 nV input referenced error per 1Ω source resistance

RTD:

2-wire platinum, 100Ω
DIN curve (0.00385 curve)
125 μA nominal RTD excitation current

Input Accuracy Span Range:

Type E: -328 to 1470°F or -200 to 800°C
Type J: 32 to 1382°F or 0 to 750°C
Type K: -328 to 2282°F or -200 to 1250°C
Type T: -328 to 662°F or -200 to 350°C
RTD (DIN) -328 to 1472°F or -200 to 800°C

Thermocouple Input:

Calibration accuracy: ±1% of input accuracy span, ±1° at standard conditions and actual calibration ambient
Exception: Type T, ±2.4% of input accuracy span for -200 to 0°C (-328 to 32°F)
Temperature stability: ±0.3° per degree change in ambient

RTD Input:

Calibration accuracy ±1% of input accuracy span ±1° at standard conditions and actual calibration ambient
Temperature stability: ±0.2° per degree change in ambient

Allowable Operating Ranges:

Type E: -328 to 1470°F or -200 to 800°C
Type J: -346 to 1900°F or -210 to 1038°C
Type K: -454 to 2500°F or -270 to 1370°C
Type T: -454 to 750°F or -270 to 400°C
RTD (DIN) -328 to 1472°F or -200 to 800°C

Output Types:

Switched dc (non-isolated, on-off controller only)
Supply voltage max.: 24VDC into an infinite load
Supply voltage min.: 5VDC at 10mA
Min. load impedance: 500Ω

Electromechanical Relay, Form C:

Min. load current: 100mA
8A @ 240VAC or 30VDC max., resistive
250VA pilot duty, 120/240VAC max., inductive
Use RC suppression for inductive loads
Electrical life 100,000 cycles at rated current

Agency Approvals:

UL® 60730-1 recognized temperature controller and indicator on potted models
UL® 873 recognized temperature controller and indicator, File # E43684
UL® 197 reviewed for use in food service appliances
ANSI Z21.23 gas appliance thermostat approval
Temperature control and indicator CSA 22.2 No. 24, File # 30586

Terminals:

0.25 in. (6.3 mm) quick connect, push on terminal or removable screw style terminal block

Power:

24VAC +10%; -15%; 50/60Hz, ±5%
100 to 120VAC +10%; -15%; 50/60Hz, ±5%
200 to 240VAC +10%; -15%; 50/60Hz, ±5%
10VA max. power consumption
Data retention upon power failure via nonvolatile memory

Operating Environment:

32 to 158°F (0 to 70°C)
0 to 90% RH, non-condensing
Storage temperature: -40 to 185°F (-40 to 85°C)

Dimensions:

DIN-rail model can be DIN-rail or chassis mount
DIN-rail spec DIN 50022, 1.38 in. x 0.30 in. (35 mm x 7.5 mm)

Products

Sign up for Zesta Connection

Watlow CF Series Temperature Controller

Product Features

Product Specifications

Resources