Owner manual

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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.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]
1-800-554-5866
Fax: [phone]
E-mail: [e-mail]
Internet: www.jumousa.com
Type 608425/2316
2011-11-08/00402234
Contact Dial Thermometers
Type 608425
Data Sheet 608425
Type 608425/2496
Technical data
Type 608425
round panel- or surface-mounting housing
Typ 608425
square panel-mounting instrument
Housing housing with bayonet lock
in stainless steel (1.4301)
galvanized sheet steel housing, fixed at back by a
bracket; front bezel in stainless steel (1.4301)
Enclosure protection IP65 as per EN 60 529 front: IP51 as per EN 60 529
back: IP00 as per EN 60 529
Electrical connection terminal box: conductor cross-section up to
2.5mm
2
cable gland suitable for cable dia. 6.5 — 13 mm
screw terminals: conductor cross-section up to
2.5mm
2
Glass window polycarbonate plexiglas (PMMA)
Scale white, black lettering
Accuracy class Class 1 to EN 13190
Anti-kink spring for capillary instruments, at the housing and probe
Setpoint adjustment through setpoint adjuster on the glass window
Indication correction at the back, no indication correction for styles 01 and 20 (100 mm dia.)
Temperature limits for transport and storage -20°C to +70°C (with a 0 to +60°C range: max. 65°C)
Operating position (NL) unrestricted
Liquid filling Gas filling
Measuring system range (AB) ≤ 350°C range (AB) ≤ 400°C
Time constant
t
0.632
approx. 12 sec, measured in water bath,
with a 6 mm dia. copper probe
approx. 4 sec, measured in oil bath,
with a 10 mm dia. stainless steel probe
Ambient temperature
error
in % of indication range (referred to the deviation from the reference value at +23°C)
at housing 0.15% of indication range
per °C change of ambient temperature
0.05% of indication range
per °C change of ambient temperature
on capillary (per meter) 0.03% of indication range
per °C change of ambient temperature
no effect
At higher ambient temperatures – higher temperature indication – lower switching point
Particularities
• temperature controller with indication for panel or surface mounting
• Class 1
• protection up to IP65
• housing sizes: 100 mm and 160 mm diameter, bezel 96 x 96 mm
Brief description
Contact dial thermometers are universally applicable instruments with indication of the actual
value, for temperature measurement, control and monitoring.
The temperature-dependent change in volume of a liquid-filled measuring system (or the
temperature-dependent change of pressure in a gas-filled measuring system) is converted into
a rotary movement of the pointer by a Bourdon tube, without any intermediate gearing. The
rotary movement of the pointer shaft is used to operate the switched output.
The pointer is directly linked to the measuring system, which makes the overall system
extremely torsionally rigid. Vibrations are transmitted to the pointer only to a minor extent.
The switched output can be implemented as a slow-break, magnetic snap-action or inductive
contact. The slow-break or magnetic snap-action contact is an auxiliary circuit switch that,
depending on the direction of movement, opens or closes an electrical circuit at the set limits,
by means of a contact arm that is attached to the moving pointer.
The inductive contact is an electronic limit detector operated by a contactless position sensor
(proximity switch).