JUMO 605041 Explosion-protected surface-mounting thermostat, ATH-EX Operating Manual - Manual (Page 16)

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5 Settings
5.1 Limit setting
✱ Open housing.
➈ Chapter 3.2 “Opening the surface-mounting thermostat”, page 8
✱ Set the limit at the setpoint spindle ( 5 ).
5.2 Self-monitoring
5.2.1 Response to a fracture in the measuring system
5.2.2 Response to low temperature
( 1 ) Upper stop
( 2 ) Setpoint marker
( 3 ) Lower stop
( 4 ) Scale division
( 5 ) Setpoint spindle
On the STW, the circuit stays open permanently in the event of a fracture of the
measuring system (leakage).
The current circuit of the STW is opened when the probe temperature goes
below approx. -20°C
When the temperature rises above the minimum probe temperature, the STW
resets itself automatically.