Datasheet

2010-01-07/00415410
Data sheet 60.2031 Page 2/10
JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14,
36039 Fulda, Germany
Postal address: 36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow - Essex CM20 2DY, UK
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
8 Technology Boulevard
Canastota, NY 13032, USA
Phone: 315-697-JUMO
1-800-554-JUMO
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumo.us
Technical Data
Switching function
Temperature compensation
Temperature controller TR /
temperature monitor TW
If the temperature exceeds the set point value set on the temperature probe, the micro switch will be tripped
via the transmission mechanics and the current circuit opened or closed. The micro switch is reset to its origi-
nal status once the set point value set is gone below (by the hysteresis).
Safety temperature monitor
STW
If the temperature exceeds the set point value set on the temperature probe, the snap
switch will be tripped and the current circuit opened or closed. The snap switch is reset to its original status
once the set point value set is gone below (by the hysteresis).
If the probe has cooled down to a temperature below approx. -20°C, the current circuit opens, however, auto-
matically closes again, when the temperature rises.
If the measuring system is destroyed, i.e. if the expansion fluid emerges, the pressure in the diaphragm drops
and permanently opens the current circuit.
Safety temperature limiter
STB with restart lock and
self-monitoring
If the temperature exceeds the switching point set on the temperature probe, the snap switch is tripped, the
current circuit opened and the snap switch mechanically locked.
The snap switch can be manually unlocked again once the switching point temperature has gone below by
approx. 10K.
If the probe has cooled down to a temperature below approx. -20°C, the current circuit opens, however, auto-
matically closes again, when the temperature rises.
If the measuring system is destroyed, i.e. if the expansion fluid emerges, the pressure in the diaphragm drops
and permanently opens the current circuit. Unlocking is impossible.
When the ambient temperature on the switch head and the long-distance line deviates from the calibration
ambient temperature +22°C, a switch point offset occurs. This switching point offset is minimized due to the
temperature compensation.