Operating Manual

19
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
If the probe temperature goes below the minimum value of -10 °C, the circuit is
opened.
After the minimum probe temperature is exceeded, the STB must be manually
reset.
➈ Section 5.2 “Resetting the STB”, page 19.
The TW and STW reset 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.