Temperature compensation (tk) – JUMO 602021 Panel-Mounted Thermostat EM Series Up to 500C Data Sheet User Manual
Page 10
Data Sheet 602021
2014-01-20/00073206
Page 10/14
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
Temperature compensation (TK)
Any change in the temperature at the switching head from the 22 °C calibration ambient temperature will produce a deviation of the switching
point. For ambient temperatures that fluctuate strongly, it is advisable to use thermostats with temperature compensation (extra code "TK").
The switching point deviation depends on the ambient temperature at the switching head and takes the switching differential into consideration.
The temperature influence on the capillary is not yet taken into account and can result in an additional error.
Version without temperature compensation
Version with temperature compensation
Scale limit value < +200 °C
EM 1-pole/EM 2-pole
EM 1-pole temperature compensation TK
Note:
Additional graphs of the temperature compensation TK with higher
scale limit values and for the EM 2-pole version are available upon re-
quest.
(1) % of the control range
(1) % of the control range scope
(2) Without temperature compensation
(2) With temperature compensation
(3) Ambient temperature [°C]
(3) Switching differential
(4) Ambient temperature [°C]
(5) Switching point deviation
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
0
5%
7%
2.5%
-24
-26
+30
+22
+40
+50
+60
+70
+80
+100
+90
-28
-30
0
( 1 )
( 2 )
( 3 )
0
-1
+2
5%
+30
+22
+40
+50
+60
+70
+80
-2
-3
7%
+1
2.5%
+100
+90
0
( 1 )
( 2 )
( 3 )
( 4 )
( 5 )
Note:
Physical and toxicological properties of the expansion medium that may escape in the event of a measuring system fracture.
Control range
with scale limit value
Hazardous
reactions
Fire and explosion hazard
Hazardous
to water
Information about toxicology
Ignition
temperature
Explosion limit
Irritant
Health risks
Toxic
<
200 °C
No
355 °C
0.6 - 8 V %
Yes
Yes
a
a. At present, no statement concerning health hazards in the event of short-term exposure and low concentration
(e.g. measuring system rupture) has been made by the health authority
No
≥
200 °C
≤ 350 °C
No
490 °C
-
Yes
Yes
a
No
> 350 °C ≤ 500 °C
No
No
No
No
No
No
No