Self-Monitoring On The Stb And Stw (Stb); Use Of The Stw (Stb) As Stb - JUMO EM Series Operating Manual

6 Settings
6.3

Self-monitoring on the STB and STW (STB)

NOTE!
If the measuring system fails, i.e. if the expansion liquid has leaked, then the pressure under the dia-
phragm drops and the circuit is permanently open. It is no longer possible to reset the system.
The electrical circuit opens when cooling the probe of STW (STB) and STB down to the negative tem-
perature range, but it then closes again if the temperature rises. The STB must be unlocked manually if
the minimum probe temperature is exceeded.
The STW unlocks itself automatically.
6.4

Use of the STW (STB) as STB

CAUTION!
The lock-out facility to DIN EN 14597 must be ensured by the subsequent circuit. This circuit
must comply with VDE 0116.
28