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Construction thermostat JUMO ATHs-70 (STB) with external unlocking

Short description

Setup thermostat model series ATH
Protection type IP 54
Controlling thermostats and monitoring thermal processes. ATH model range devices are available as temperature controllers TR, temperature limiters TW, safety
temperature monitors STW (STB) and safety temperature limiters STB. In the event of any faults, the STB puts the monitored system into a reliable
state.
Setup thermostats work according to the principle of fluid expansion; a micro switch is used as switching element.

Temperature controller TR und temperature monitor TW
If the pending temperature exceeds the set
target value on the sensor, the micro switch is operated via the gear ration mechanism and the
circuit is opened or closed. In the event of the set
target value remaining low (by the amount of the switching differential), the micro switch is moved back into the output
position.

Self-monitoring with the safety temperature limiter STB
and the safety temperature monitor STW (STB)
If the measuring systems is destroyed, i.e if the expansion liquid escapes,
the pressure in the diaphragm drops with the STB and STW (STB), and the circuit
remains open. Unlocking is no longer possible. When the sensor
cools to a temperature under approx. -20°C, the circuit is also opened, when
the temperature rises above approx. -20°C, the STB must first be unlocked
manually via a re-activation button. STW (STB) reactivation takes place
automatically.

Reactivation lock with safety temperature limiter STB
If the pending temperature exceeds the set
limit value on the temperature sensor, the circuit is opened and the micro switch is mechanically locked.
Once the critical temperature remains lower that approx. 10% of the scale range
(approx. 15% with a limit value setting > +350°C), the micro switch can be unlocked
manually.

Order Number: Please select a variant

Construction thermostat JUMO ATHs-70 (STB) with external unlocking

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