5 Settings
18
5.3
Limit locking
( 1 ) Cover
( 2 ) Screw suitable for lead sealing
5.4
Self-monitoring
5.4.1
Response to a fracture of the measuring system
5.4.2
Response to falling below the temperature limit
5.5
Use of the STW (STB) as STB
( 2 )
( 1 )
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.
H
If the probe cools down to below the minimum temperature of -10°C, the circuit
opens automatically (STW (STB) and STB).
As the temperature rises above the minimum probe temperature, the STB has
to be reset manually.
➩
Chapter 5.2 “Resetting the safety temperature limiter (STB)", page 17.
The STW resets itself automatically.
V
The lock-out function to DIN 3440 must be ensured by a subsequent circuit.
This circuit must conform to DIN VDE 0116, Section 8.7.
