JUMO 60.8425 Contact dial thermometer Data Sheet User Manual
Page 2
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:
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:
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:
Internet: www.jumousa.com
2011-11-08/00402234
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 slot-
type 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:
Current drawn
≥ 3mA
(active area is clear, the oscillator is active).
Control flag is within the sensor air gap,
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
[EEx ia] IIC)
from Pepperl & Fuchs (www.pepperlfuchs.de).
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.
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.
Control range with
scale limit value
Hazardous re-
actions
Fire and explosion hazard
hazardous to
waters
Information about toxicology
Ignition tem-
perature
Explosion limit
irritant
dangerous to
health
toxic
<
+200°C
no
+ 355°C
0,6 - 8 V%
yes
yes
1)
no
≥
200°C
≤ +350°C
+ 490°C
- -
yes
yes
1)
> 350°C ≤ +500°C
no
no
no
no
no