JUMO 603026 Surface-Mounted Double Thermostat ATH Data Sheet - Manual

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JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address: 36035 Fulda, Germany
Phone: +49 661 6003-0
Fax: +49 661 6003-607
E-mail: [email protected]
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2DY, UK
Phone: +44 1279 635533
Fax:
+44 1279 635262
E-mail: [email protected]
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: 315-437-5866
1-800-554-5866
Fax: 315-437-5860
E-mail: [email protected]
Internet: www.jumousa.com
Surface-mounting double thermostat
ATH type series
Data Sheet 603026
2013-03-13/00073228
ATHf-170
ATHs-12
The declarations of conformity
can be found in the internet under:
www.jumo.net
➾ Products
or they can be sent on request.
Approvals/approval marks (see Technical Data)
Particularities
• Fluid expansion
• Microswitch
• Self-monitoring (STB/STW)
• Safety cut-out (STB/STW)
• 2 separate measuring and switching systems
Brief description
Thermostats are used to control and monitor thermal processes. Surface-mounting double
thermostats of the ATH type series consist of two separate measuring and switching systems.
The devices are available as temperature controllers TR, temperature monitors TW, safety tem-
perature monitors STW (STB) and safety temperature limiters STB. In the event of a malfunction,
the STB switches the monitored machine line to an operationally safe status.
Surface-mounting double thermostats operate according to the fluid expansion principle, a mi-
croswitch serves as an electrical switching element.
Switching function
Temperature controller TR and temperature monitor TW
If the temperature exceeds the set point value set on the temperature probe, the microswitch
will be tripped by the transmission mechanics and the current circuit opened or closed. The mi-
croswitch is reset to its original status once the set point value set is gone below (by the hys-
teresis).
Restart lock for the safety temperature limiter STB
If the temperature exceeds the limit value set on the temperature probe, the current circuit is
opened and the microswitch mechanically locked.
The microswitch can be manually unlocked, once the dangerous temperature drops by approx.
10 % of the scale range (approx. 15% with a limit value setting
> + 350 °C).
Use of the safety temperature monitor STW as a safety temperature limiter STB
Ensure that the switching circuit downstream of the thermostat complies to DIN EN 14597 and
VDE 0116.
Self-monitoring for the safety temperature limiter STB
and safety temperature monitor STW (STB)
If the measuring system is destroyed, i.e. if the expansion fluid escapes, the pressure in the di-
aphragm of the STB and STW (STB) drops and permanently opens the current circuit. Unlocking
is no longer possible. If the probe has cooled down to a temperature below approx. -20 °C, the
current circuit is opened, when the temperature rises above approx. -20 °C, the STB must be
unlocked manually first using the re-starting button. The STW (STB) automatically restarts.