JUMO 60.8425 User Manual

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

Contact Dial Thermometers

Type 608425

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).

Data Sheet 608425

Page 1/6

Type 608425/2496

Technical data

Housing housing with bayonet lock

Enclosure protection IP65 as per EN 60 529 front: IP51 as per EN 60 529

Electrical connection terminal box: conductor cross-section up to

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

Measuring system range (AB) ≤ 350°C range (AB) ≤ 400°C
Time constant

t

0.632

Ambient temperature
error

at housing 0.15% of indication range

on capillary (per meter) 0.03% of indication range

2011-11-08/00402234

round panel- or surface-mounting housing

cable gland suitable for cable dia. 6.5 — 13 mm

approx. 12 sec, measured in water bath,

with a 6 mm dia. copper probe

in % of indication range (referred to the deviation from the reference value at +23°C)

per °C change of ambient temperature

per °C change of ambient temperature

At higher ambient temperatures – higher temperature indication – lower switching point

Type 608425

in stainless steel (1.4301)

2

2.5mm

Liquid filling Gas filling

square panel-mounting instrument

galvanized sheet steel housing, fixed at back by a

bracket; front bezel in stainless steel (1.4301)

back: IP00 as per EN 60 529

screw terminals: conductor cross-section up to

approx. 4 sec, measured in oil bath,

with a 10 mm dia. stainless steel probe

per °C change of ambient temperature

Typ 608425

2

2.5mm

0.05% of indication range

no effect

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

Data Sheet 608425

Page 2/6

Standard Extra code (TZ) 442
Electrical contact
Contact type electromechanical slow-break contact

with single-pole make contacts

electromechanical magnetic snap-action contact

with single-pole make contacts

Contact rating 230 V AC/DC, +10/-15%, 48 — 63Hz, p.f = 1 (0.6)

max. 18 VA / 10 W max. 50 VA / 30 W

Switching differential ≤ 0.5% of indication range approx.2% of indication range
Switching point accuracy ±0.5% of indication range (referred to the switching point for rising temperature)
Switching reliability To ensure maximum switching reliability, we recommend a minimum voltage of 24 V and a minimum current

of 20 mA

Electromechanical limit contact Inductive limit contact

Switching output 01 to 11 30 and 31

The inductive limit contact is operated by a
contactless proximity switch. The sensor is a slot­type initiator attached to the setpoint indicator. The
control flag is activated by the pointer.

If the control flag moves into the sensor gap, the
internal resistance increases (active area is damped:
initiator is high-resistance, relay is de-energized).
The switching amplifier of the control device
responds to the resulting change in current.

Switching action according to the
“active current principle”.

Control flag is not within the sensor air gap, relay is
energized:

(active area is clear, the oscillator is active).

Control flag is within the sensor air gap,

Current drawn ≥ 3mA

Relay is de-energized:

Current drawn ≤ 1mA

(active area is damped, no oscillation).

Inductive limit contact

as per Directive 94/9 EC (ATEX),

suitable for II 2 G EEx ia IIC T6

for switching sequence and diagrams: see order details

Secondary switched devices For electromechanical limit detectors we recommend using Type MSR multi-function relays from:Wiebrock

Mess- und Regeltechnik GmbH, www.wiebrock.de.

These switching amplifiers increase the switching reliability and switching capacity of slow-break and

magnetic snap-action contacts, and reduce their contact loading.

Unintended switching of the limit contact (caused by vibration) can be considerably reduced by using a

drop-out delay.

With inductive limit detectors, you can use the transistor relay:

Type KFA6-SR2-Ex...W (II (1) G D

Intrinsic safety II 2 G EEx ia IIC T6 can only be ensured if this transistor relay is used.

Note:

Physical and toxic features of the expansion means, which could emerge in the event of a measuring system break.

Control range with

scale limit value

< +200°C

Hazardous re-

actions

Fire and explosion hazard hazardous to

Ignition tem-

perature

Explosion limit irritant dangerous to

+ 355°C 0,6 - 8 V% yes yes

no

> 350°C ≤ +500°C no no no no no

1)

There is currently no statement by the health authority concerning hazards to health in the event of short-term exposure and low concentration, e.g. measuring

system break.

2011-11-08/00402234

[EEx ia] IIC) from Pepperl & Fuchs (www.pepperlfuchs.de).

waters

Information about toxicology

health

1)

1)

toxic

no≥ 200°C ≤ +350 °C + 490°C - - yes yes