Self-Monitoring; Response To A System Fracture; Response To Falling Below The Temperature Limit; Use Of The Stw (Stb) As Stb - JUMO ATHf-SW Operating Instructions Manual

5 Settings
5.3

Self-monitoring

5.3.1 Response to a system fracture

H
On the STB and STW (STB), a fracture of the measuring system (leakage) will
cause the circuit to open permanently.
On the STB, the microswitch will additionally be locked.

5.3.2 Response to falling below the temperature limit

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If the probe cools down to below the minimum temperature of -10°C , the cir-
cuit will open (STW (STB) and STB).
As the probe temperature rises to above the minimum temperature, the STB
has to be reset manually.
➩ Chapter 5.2 "Resetting the STB", page 23.
The STW resets itself automatically.
5.4

Use of the STW (STB) as STB

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24
The lockout function to DIN 3440 must be ensured by the connected circuitry.
This circuit must conform to DIN VDE 0116, Section 8.7.