JUMO 605055 exTHERM-AT Data Sheet - Manual (Page 2)

2014-07-15/00576368
Data Sheet 605055 Page 2/9
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
Technical data
Switching function
Temperature monitor TW and safety tem-
perature monitor STW Restart lock for the safety
temperature limiter STB Self-monitoring for the safety temperature
monitor STW and safety temperature limiter
STB
If the temperature on the temperature probe
exceeds the setpoint value, the microswitch is
activated by the transmission mechanics and
the electrical circuit is opened or closed.
If the temperature falls below the selected set-
point value (by the amount of the switching
differential), the microswitch is reset to its ini-
tial position.
If the temperature on the temperature probe
exceeds the set limit value, the electrical cir-
cuit is opened and the microswitch is mechan-
ically locked.
The microswitch can be manually unlocked
once the dangerous temperature of the set-
point value drops by approx. 20 % of the scale
range.
If the measuring system is destroyed (i.e. if the
expansion fluid escapes) the pressure in the
membrane of the STB and STW drops and
permanently opens the electrical circuit.
Unlocking is then no longer possible.
If the probe has cooled down to a temperature
below approx. 40 °C the electrical circuit also
opens – however it automatically closes again
when the temperature rises.
Temperature compensation
When the ambient temperature on the switching head and the capillary deviates – from the calibration ambient temper-
ature of +22 °C – a switching point offset occurs. This switching point offset is reduced to a minimum due to the tem-
perature compensation.
Case
Material Polyester case, glass fiber reinforced, black (option: stainless steel)
Protection type EN 60529 - IP66 (polyester case), pollution level 2, IP 66 with extra code 861
Setpoint
value adjustment
With screwdriver (once the case lid has been removed)
Switching
head fastening
Using four screws (once the case lid has been removed)
Weight Approx. 1200 g single thermostat / approx. 2000 g double thermostat
Cable inlet Ex cable gland M20 × 1.5, sealing area 6 to 13 mm
and Ex cable gland M25 × 1.5, sealing area 7 to 17 mm
Process connection
JUMO exTHERM-AT
with capillary
Plain cylindrical probe (standard), rigid thermowell, spiral probe for room thermostat version
Accessories
JUMO exTHERM-AT Multi-section standard thermowells made out of CrNi for use in zones 1, 2, 21, 22 (see data sheet 606710)
Multi-section thermowells made out of CrNi for use in zone separation 0/1, 20/21 (see new data sheet 605057)
Operating data
Medium ambient
temperature influence When the ambient temperature on the switching head and/or the capillary
deviates from the calibration ambient temperature of +22 °C, a switching point offset occurs.
Higher ambient temperature = lower switching point
Lower ambient temperature = higher switching point
Admissible storage
temperature / admissi-
ble ambient tempera-
ture when in use
-40 °C, optionally -55 °C to +70 °C (referring to T4)
Max.
probe temperature
+15 % of the limit value / max. adjustment value or 25 K
Rated position (NL) According to DIN 16257, NL 0 to NL 90