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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:

mail@jumo.net

Internet:

www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House

Temple Bank, Riverway

Harlow, Essex CM 20 2TT, UK

Phone: +44 1279 635533

Fax:

+44 1279 635262

E-mail:

sales@jumo.co.uk

Internet: www.jumo.co.uk

JUMO PROCESS CONTROL INC.

885 Fox Chase, Suite 103

Coatesville PA 19320, USA

Phone:

610-380-8002

1-800-554-JUMO

Fax:

610-380-8009

E-mail:

info@JumoUSA.com

Internet: www.JumoUSA.com

Surface-mounting thermostats

Series ATH

Series IP54

Brief description

Thermostats control and monitor thermal processes. Thermostats in the ATH series can

be supplied as temperature controllers TR, temperature monitors TW, temperature limit-

ers TB, safety temperature monitors STW (STB) and safety temperature limiters STB. In

fault condition, the STB sets the system being monitored to a safe operational state.

Surface-mounting thermostats operate on the principle of liquid expansion, with a mi-

croswitch serving as the electrical switching device.

Switching function

Temperature controller TR and temperature monitor TW

When the temperature at the probe exceeds the set limit, the microswitch is operated

through the mechanism and the circuit is opened or closed. When the temperature has

fallen below the set limit (by the switching differential), the microswitch returns to its initial

position.

Lock-out facility

on the temperature limiter TB and safety temperature limiter STB

When the temperature at the probe exceeds the set limit, the circuit is opened and the mi-

croswitch is locked out mechanically.

After the temperature has dropped below the safe temperature limit by about 10 % of

span (about 15% for limit setting

>+350°C), the microswitch can be reset manually.

Use of the safety temperature monitor STW as safety temperature limiter STB

In this case, the circuit connected to the thermostat must comply with DIN 3440 and with

Section 8.7 of DIN/VDE 0116.

Self-monitoring on the safety temperature limiter STB

and safety temperature monitor STW (STB)

In the case of the STB and STW (STB), failure of the measuring system, i.e. a leakage of

the expansion fluid, will cause the pressure under the diaphragm to drop, thus permanent-

ly opening the circuit. A reset is now impossible.

If the temperature at the probe cools down to below -20°C, the circuit will also be opened.

As the temperature rises to above -20°C, the STB has to be reset manually, by pressing

the reset button. On the STW (STB), the reset is performed automatically.

Data Sheet 60.3021

10.03/00073225

ATHs-1

ATHf-70/g

Types and approvals

Types

Switching function

DIN Reg. No.

Tests

You will find the

Declarations of

Conformity on the In-

ternet at:

www.jumo.net

➾ Products

➾ Thermostats

➾ Data Sheet 60.3021

or

they can be sent to

you on request.

with rigid stem

with capillary

- DIN 3440

- Pressure

Equipment Directive

97/23/EC

(ATH.-20 and ATH.-70 only)

ATHs-10

ATHf-10

TR

TR 89 101

ATHs-20

ATHf-20

TW

TW 89 201

ATHs-70

ATHf-70

TB

TB 89 301

ATHs-20

ATHf-20

STW (STB)

STW (STB) 89 401 S

ATHs-70

ATHf-70

STB

STB 89 501