JUMO 60.2010 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

Panel-mounted Thermostats

ETH Series

Special features

• Version according to DIN EN 14597

• Pressure Equipment Directive 97/23/EC

Brief description

Panel-mounted thermostats ETH monitor thermal processes. The devices are available as
safety-temperature monitors STW (STB) and safety temperature limiters STB. In the event of a
malfunction, the STB switches the monitored machine to a safe operating status.

Panel-mounted thermostats operate according to the fluid expansion principle; a microswitch
is used as an electrical switching element.

Data Sheet 602010

Page 1/7

Approvals/approval marks (see "Technical Data")

Typ e E TH - 2 0

Typ e E TH - 7 0

2013-06-20/00073220

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

Technical data

Switching function

Data Sheet 602010 Page 2/7

Safety temperature monitor
STW

If the temperature on the temperature probe exceeds the set limit value, the electrical circuit is opened
by a snap-action switch. If the temperature falls below the selected limit value
(by the amount of the switching differential), the switch is reset to its initial position.

Restart lock of 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).

Use of the safety

The switching circuit following the thermostat must comply with DIN EN 14597 and VDE 0116.

temperature monitor STW
as a safety temperature
limiter STB

Self-monitoring for the
safety temperature limiter
STB and safety temperature
limiter 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. Unlocking is no longer possible.

If the probe has cooled down to a temperature below approx. -20 °C, the electrical circuit is also opened;
when the temperature rises above approx. -20 °C, the STB must be unlocked manually using the restart knob.
The STW (STB) automatically restarts.

Control ranges and temperature probes

Type Control ranges /

limit value ranges

in °C

ETH-20

ETH-70

+30 to +110

+60 to +130

+20 to +150

+50 to +250

+50 to +300

ETH-20

ETH-70

+20 to +400

+20 to +500

+20 to +500

Max. allowable

probe temperature

Liquid-filled

in °C

135

150

175

290

345

Gas-filled

460

575

575

Maximum

capillary length

in mm

5000

1000

2000

4000

Probe length, dimension "L" in mm

Probe−∅ "d" in mm, ∅ "6" = in standard

68

108

116

77

64

55

176

127

202

75

79

60

49

- -

106

81

119

Capillary and temperature probe

Type Scale limit value Capillary Temperature probe Comments

ETH- ..

Up to 200 °C

Up to 350 °C

Up to 500 °C

Up to 350°C

Capillary length Standard 1,000 mm, maximum 5,000 mm

Minimum bending radius of
the capillary

2013-06-20/00073220

Copper (Cu)

ø 1.5mm

Material no. 2.0090

Copper (Cu)

ø 1.5mm

Material no. 2.0090

Stainless steel (CrNi)

ø 1.5mm

Stainless steel (CrNi)

ø 1.5mm

Copper (Cu)

Material no. 2.0090

Hard soldered

Stainless steel (CrNi)

Material No. 1.4571

Stainless steel (CrNi)

Material no. 1.4571

Stainless steel (CrNi)

Material no. 1.4571

5 mm

ø 1.5mm

ø 1.5mm

ø 1.5mm

- -

- -

- -

Available at extra cost

Data Sheet 602010 Page 3/7

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

Technical data

Electrical data

Switching element ETH-20 ETH-70 ETH-70/U

Microswitch with changeover
contact

Maximum switching capacity AC 230 V +10 %, 10 (2) A, cos ϕ = 1 (0.6), DC 230 V +10 %, 0.25 A

With switching differential 2%
AC 230 V +10 %, 6 (1.2) A,
cos ϕ = 1 (0.6),

Microswitch, gold-plated, extra code /au
AC/DC24V, 0.1A
Contact resistance 2.5 to 10 m

Contact reliability To ensure a high switching reliability, we recommend a minimum load of:

With silver contacts:
AC / DC = 24 V, 100 mAt

Approvals/approval marks

Microswitch with N/C contact and
restart lock

- - - -

Ω

With gold-plated contacts (abbreviation "au":
AC / DC = 10 V, 5 mA

Microswitch with N/C contact,
restart lock, and additional signal
contact

- -

Type Switching

DIN register no. Tests Important note !

function

ETH-20 STW (STB) STW (STB) 799S Pressure Equipment

ETH-70 STB STB 800

Directive 97/23/EC
CE0036

Operating data

Switching differential in %
from the control range / limit
value range

Switching point accuracy in
% of the limit value range

Ambient temperature
influence referring to
the control range / limit value
range

Allowable storage
temperature

Allowable ambient
temperature when in use:

Rated position (NL)

2013-06-20/00073220

Switching function With liquid-filled measuring system

Nominal value Possible actual value

STW (STB) 5 4 max. 6 Standard

9 8 max. 11 Upon request

2 1 max. 3 Extra cost

With liquid-filled measuring system

75 max. 12Standard

9 8 max. 16 Upon request

2 1.5 max. 3 Extra cost

In the upper third of the scale +0/-5 %, at scale beginning +0/-10 %

When the ambient temperature on the switching head deviates from the calibration

ambient temperature of +22 °C, a switching point offset occurs.

Higher ambient temperatures = lower switching point

Lower ambient temperature = higher switching point

Panel-mounted thermostats with scale limit value

< 200 °C ÷ 200 °C ≤ 350 °C > 350 °C ≤ 500 °C

Influence on the switching head

0.17%/K 0.13%/K 0.12%/K

Influence on the capillary per meter

0.054%/K 0.11%/K 0.03%/K

-50 to +50°C

Max. +80 °C

Any

The DIN registry no. will
become null and void if
thermowells are used that are
not specified in our data sheet

606710.