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HOW ROBOTEMP WORKS AND WHY IT CONTROLS SO ACCURATELYThe Robotemp is an "on-off" pulsator which proportions
electric power at line voltage to an electrically heated device.
The ratio of "on" to "off" time can be varied by turning an adjustment
knob. Because of the frequent "on-off" cycles per minute, the Robotemp
maintains precise thermal control with a smooth time temperature
characteristic.
MODEL 515
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MODEL 315
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APPLICATIONS
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FEATURES
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THERMAL TIME DELAY RELAYS
OPERATING PRINCIPLE:
Ulanet thermal timers comprise an assembly having one stationary adjustable contact and one movable contact attached to the end of a bimetal strip. A heater coil winding is insulated from the bimetal by a wrapping of high dielectric heat resisting tape. Upon energizing the heater coil the bimetal bends and either closes or opens a set of contacts according to adjustment screw settings. After heater is deenergized the bimetal cools and returns to its original position.
Normally open timers close contacts after energization. To increase timing turn adjustment screw so that contact gap is increased
Normally closed timers open contacts after heater coil is energized. To increase timing turn adjustment screw in the direction that increases contact pressure.
MODEL 211
Has two contact springs and a bimetal element which
is insulated from current carrying parts Mounts with #8 screw through
eyelet hole.
CONTACT RATING:1500W 115-230 V.A.C.
HEATER COIL RATING:UP to 230 V.A.C.
TIMING RANGE: UP to 3 min. DIMENSIONS:2-1/8" L. x 1/2"
W. x 5/8" H.
MODEL 212
Is a heavy duty thermal timer housed in a metal case.
Mounting holes for #10 screws spaced at 2-3/4" centers. Terminals
are provided for heater and 4" leads for the contact circuit.
CONTACT RATING:1500W. 115-230 V.A.C.
HEATER COIL RATINGS: UP to 230 V.A.C.
TIMING RANGE:UP to 3 min. DIMENSIONS:3-1/4" L. x 3/4"
W x 21/32" H.
MODEL TRM
Is a manual reset timer Heated bimetal actuates a
snap contact spring to open the contacts at a given preset timing.
Unit is mounted by two #6 screws at 5/16" centers.
CONTACT RATING:1000W 115-230 V.A.C.
HEATER COIL RATING:UP to 230 VA.C.
TIMING RANGE:20 sec.- 3 min.
DIMENSIONS: 3-1/2" L. x 1-1/8" W. x 1-3/4" H.
MODEL 312
Thermal timer is hooked up as a pulsator. The heater
coil is connected in series with contacts. When energized, the contacts
open and close at a given "time-off" to "time-on" ratio. Turning
the adjustment shaft clockwise increases time-on to time-off ratio.
The unit provides infinite temperature control at location remote
from heating appliance.
CONTACT RATING: 1500W. 115 VA.C.
HEATER COIL RATING:115 V.A.C.
Dimensions: 2-3/32" L. x 1/2" W. x 5/8" H.
