JUMO 603021 Surface-Single Mounted Thermostat, ATH series 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-Mounted Thermostat
ATH series
Data Sheet 603021
2014-01-08/00073225
ATHs-1
ATHf-70
Approvals
Brief description
Thermostats control and monitor thermal processes. Instruments of the ATH series are avail-
able as temperature controllers TR, temperature monitors TW, safety temperature monitors
STW (STB), and safety temperature limiters STB. When malfunctions occur, the STB places the
system being monitored in a safe operating status.
Surface-mounted thermostats operate according to the fluid expansion principle – a micro-
switch is used as an electrical switching element.
Special features
• Sturdy case (protection type IP 54))
• Microswitch
• Self-monitoring (STB/STW) in the event of a pressure drop
• Safety cut-out (STB/STW)
• Tested according to DIN EN 14597
Switching function
Temperature controller TR and temperature monitor TW
If the temperature on the temperature probe exceeds the setpoint value, the microswitch is ac-
tivated by the transmission mechanics and the electrical circuit is opened or closed. If the tem-
perature falls below the selected setpoint value (by the amount of the switching differential), the
microswitch is reset to its initial position.
Restart lock on the safety temperature limiter STB
If the temperature on the temperature probe exceeds the set limit value, the electrical circuit is
opened and the microswitch is 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).
Using the safety temperature monitor STW as a safety temperature limiter STB
The circuit following the thermostat must comply with DIN EN 14597 and VDE 0116.
Self-monitoring on the safety temperature limiter STB
and the safety temperature monitor STW (STB)
If the measuring system is destroyed (i.e. if the expansion fluid escapes) the pressure in the
membrane of the STB and STW (STB) drops and permanently opens the electrical circuit. Un-
locking is then no longer possible.
If the probe has cooled down to a temperature below approx. -20 °C, the electrical circuit is
opened; when the temperature rises above approx. -20 °C, the STB must be unlocked manually
using the restart knob. The STW (STB) automatically restarts.