Inputs
18
Resistance table for various sensor types
The standard type used by Technische Alternative is
PT1000.
KTY (2 kΩ)
was the factory-fitted standard type until 2010/2011.
PT100, PT500:
As these sensors are more susceptible to external interference, their sensor leads
must be
screened
and the
Average time
should be increased. Nevertheless the accuracy specified
in the technical data for PT1000 sensors
cannot be guaranteed.
NTC sensors
For evaluating the NTC sensors, the R25 value and the beta value must be
specified.
The nominal resistance R25 is always based on 25 °C.
The beta value refers to the characteristic of an NTC sensor in relation to
2 resistance values.
Beta is a material constant and can be calculated from the manufacturer's resistance table using the
following formula:
As the beta value is not a constant over the total temperature curve, the anticipated limits of the
measuring range must be determined (e.g. for a cylinder sensor from +10 °C to +100 °C or for an out
-
side sensor from -20 °C to +40 °C).
All temperatures in the formula must be given as absolute temperatures in K (Kelvin) (e.g. +20 °C =
273.15 K + 20 K = 293.15 K)
ln
Natural logarithm
R1
(NT)
Resistance at the minimum temperature of the temperature range
R2
(HT)
Resistance at the maximum temperature of the temperature range
T1
(NT)
Minimum temperature of the temperature range
T2
(HAT)
Maximum temperature of the temperature range
Temp.
[°C]
0
10
20
25
30
40
50
60
70
80
90
100
PT1000
[Ω]
1000 1039 1078 1097 1117 1115 1194 1232 1271 1309 1347 1385
KTY (2kΩ) [Ω]
1630 1772 1922 2000 2080 2245 2417 2597 2785 2980 3182 3392
KTY (1kΩ) [Ω]
815
886
961 1000 1040 1122 1209 1299 1392 1490 1591 1696
PT100
[Ω]
100
104
108
110
112
116
119
123
127
131
135
139
PT500
[Ω]
500
520
539
549
558
578
597
616
635
654
674
693
Ni1000
[Ω]
1000 1056 1112 1141 1171 1230 1291 1353 1417 1483 1549 1618
Ni1000
[Ω]
TK5000
1000 1045 1091 1114 1138 1186 1235 1285 1337 1390 1444 1500
