Resistance-thermometers (Pt 100) of DIN EN 60751
a) Construction of a mineral insulated resistance thermometer
Mineral insulated resistance thermometers based of mineral insulated metallic sheathed cable. In this cable, Ni - as well as Cu are predominant-connecting wires in the magnesium-oxide solidly |
|
The very good heat transfer between protection-tube and temperature-sensor enables a very quick conversation-tense from, t 90 from 0,5 sec. and high measuringprecision. The solid construction guarantees a high lifespan and the flexible metallic sheathed cable and is employable with the crook-radius of 5 x diameter (outer sheat-diameter) a temperature-measurement at badly accessible positions. The protection-tube, therefore the fore part up to the weld is not curvatured of course. For trouble-free montages, where flexibility is demanded, how for example in motor industries, pipe structure, test-bench are mineral insulated resistance thermometers, predominantly. |
b) Tabular-values and tolerance-classes for Pt 100 of IEC 751 - NEW
Temperature
area |
Tabular values of DIN EN 60751 for Pt100 |
Tolerance of DIN EN 60751 for Pt100
|
||||||||
Class AA
|
Class A
|
Class B
|
Class C
|
|||||||
ºC
|
Ohm
|
Ohm/K
|
Ohm
|
ºC
|
Ohm
|
ºC
|
Ohm
|
ºC
|
Ohm
|
ºC
|
-200
|
18,49
|
0,44
|
-
|
-
|
-
|
-
|
± 0,56
|
± 1,30
|
± 1,14
|
± 2,60
|
-100
|
60,25
|
0,41
|
-
|
-
|
± 0,14
|
± 0,35
|
± 0,32
|
± 0,80
|
± 0,65
|
± 1,60
|
-50
|
80,30
|
0,40
|
± 0,05
|
± 0,19
|
± 0,10
|
± 0,25
|
± 0,22
|
± 0,55
|
± 0,44
|
± 1,10
|
0
|
100,00
|
0,39
|
± 0,04
|
± 0,10
|
± 0,06
|
± 0,15
|
± 0,12
|
± 0,30
|
± 0,23
|
± 0,60
|
100
|
138,50
|
0,385
|
± 0,11
|
± 0,27
|
± 0,13
|
± 0,35
|
± 0,30
|
± 0,80
|
± 0,61
|
± 1,60
|
200
|
175,64
|
0,37
|
± 0,18
|
± 0,43
|
± 0,20
|
± 0,55
|
± 0,48
|
± 1,30
|
± 0,96
|
± 2,60
|
250
|
194,09
|
0,36
|
± 0,21
|
± 0,52
|
± 0,23
|
± 0,65
|
± 0,55
|
± 1,55
|
± 1,11
|
± 3,10
|
300
|
212,02
|
0,35
|
-
|
-
|
± 0,27
|
± 0,75
|
± 0,64
|
± 1,80
|
± 1,26
|
± 3,60
|
400
|
247,04
|
0,34
|
-
|
-
|
± 0,33
|
± 0,95
|
± 0,79
|
± 2,30
|
± 1,56
|
± 4,60
|
450
|
264,17
|
0,34
|
-
|
-
|
± 0,35
|
± 1,05
|
± 0,87
|
± 2,55
|
± 1,73
|
± 5,10
|
500
|
280,90
|
0,33
|
-
|
-
|
-
|
-
|
± 0,93
|
± 2,80
|
± 1,84
|
± 5,60
|
600
|
313,59
|
0,33
|
-
|
-
|
-
|
-
|
± 1,06
|
± 3,30
|
± 2,17
|
± 6,60
|