JUMO ATH.-SE Series, Operating Manual, Page: 19 / 24

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5 Settings
5.2 Resetting the STB
After the temperature has fallen below the set limit value (safe temperature
limit) by about 10% of the scale range, the microswitch can be reset.
Action
5.3 Self-monitoring
5.3.1 Behaviour in the event of a measuring system breakage
5.3.2 Response to low temperature
5.4 Using the STW(STB) as STB
1. 2. 3.
✱
Unscrew the cap nut
(1).
✱
Press the reset but-
ton (2) until the micro
switch is reset.
✱
Screw the cap nut (1)
back on
H
On the STB and STW (STB), the circuit stays open permanently in the event of
a measuring system breakage (leakage).
On the STB, the microswitch is additionally locked.
H
The electrical circuit opens when cooling the probe of STW (STB) and STB
down to the negative temperature range, but it then closes again if the temper-
ature rises. The STB must be unlocked manually if the minimum probe temper-
ature is exceeded.
The STW (STB) unlocks itself automatically.
V
The restart lock as per DIN EN 14597 must be ensured by the subsequent cir-
cuit. This circuit must be in accordance with VDE 0116.