Watlow LV Series Simple Limit Controller

Watlow LV Series Simple Limit Controller

Specifications:

Limit Controller                                                  

• Microprocessor-based limit controller

• Nominal switching hysteresis, typically 3°F (1.7°C)

• High or low limit, factory selectable

• Latching output requires manual reset upon over or under temperature condition

• Manual or automatic reset on power loss, factory selectable

• Internal front panel or external customer supplied momentary reset switch

• Input filter time: 1 second

Operator Interface

• Four digit, seven segment LED displays, 0.28 in. (7 mm) high

• °F or °C indicator LED

• Alarm indicator LED

• Continuous turn, velocity sensitive rotary encoder for set point adjustment

• Front panel SET/RESET

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

• >10 M$ input impedance

• 250 nV input referenced error per 1$ source resistance

RTD

• 2-wire platinum, 100$

• DIN-curve (0.00385 curve)

• 125μA nominal RTD excitation current

Input Accuracy Span Range

Type E: -328 to 1470°F (-200 to 800°C)

Type J: 32 to 1382°F (0 to 750°C)

Type K: -328 to 2282°F (-200 to 1250°C)

Type T: -328 to 662°F (-200 to 350°C)

RTD (DIN) -328 to 1472°F (-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 -328 to 32°F (-200 to 0°C)

• 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 (-200 to 800°C)

Type J: -346 to 1900°F (-210 to 1038°C)

Type K: -454 to 2500°F (-270 to 1370°C)

Type T: -454 to 750°F (-270 to 400°C)

RTD (DIN) -328 to 1472°F (-200 to 800°C)

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

External Reset Switch

• Momentary, dry contact closure

Agency Approvals

SERIES LV (potted version only)

• UL® 991 recognized temperature limit for cooking industry

• UL® 60730-1

SERIES LV (including potted version)

• UL® 873 recognized temperature regulator

• UL® 197 reviewed for use in cooking appliances

• UL® 991

• UL® 50 IP65 for tactile key models

• ANSI Z21.23 Gas appliance thermostat approval

• CSA C22.2#24 approved limit control

• FM Class 3545 temperature limit switches

• RoHS, WEEE

Terminals

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

Power

• 24VAC +10%; -15%; 50/60Hz, ±5%

• 120VAC +10%; -15%; 50/60Hz, ±5%

• 230 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)