EN
72
WIKA operating instructions, model CTR3000
14191761.01 05/2019 EN/DE
11. Specifications
11.2 Accuracies
Accuracies
2)
Resistance thermometer
Temperature accuracy
4-wire
3-wire
±0.005 K
±0.03 K
Temperature conversions
Standard EN 60751, CvD, ITS-90
Sensor currents
1 mA, 2 mA and √2
Keep warm currents
R
0
< 50 Ω
R
0
≥ 50 Ω
0 ... 125 Ω
0 ... 500 Ω
2 mA
1 mA
Measurement time
3 seconds update rate
Thermocouple
Base measurement
3)
±% of r µV
±0.004 % + 2 µV
Temperature accuracy
Type B
Type E
Type J
Type K
Type N
Type R
Type S
Type T
±0.09 °C + ±0.025 % of reading
±0.05 °C + ±0.031 % of reading
±0.07 °C + ±0.030 % of reading
±0.09 °C + ±0.035 % of reading
±0.08 °C + ±0.035 % of reading
±0.27 °C + ±0.020 % of reading
±0.27 °C + ±0.020 % of reading
±0.09 °C + ±0.025 % of reading
Temperature conversions
Standard EN 60584, polynomial
Measurement time
3 seconds update rate
Cold junction compensation
Internal, external or channel
Accuracy internal cold junction compensation ±0.15 K
Thermistor
Accuracy
0 ... 400 Ω
400 Ω ... 50 kΩ
50 ... 500 kΩ
±0.006 Ω
±0.01 % of reading
±0.02 % of reading
Temperature conversions
Steinhart-Hart, Polynomial
Sensor currents
0 ... 450 Ω
400 Ω ... 45 kΩ
40 ... 500 kΩ
1 mA
10 μA
3 μA
Measurement time
3 seconds update rate
2) The accuracy in K defines the deviation between the measured value and the reference value. (Only valid for indicating instruments.)
3) In a range of -20 mV ... +100 mV
11.3 Specific data for thermocouples
Specifications for thermocouples
Type
Working range [°C]
Working range [mV]
B
250 ... 1,820
0.291 ... 13.820
E
-200 ... +1,000
-8.825 ... +76.373
J
-210 ... +1,200
-8.095 ... +69.553
K
-200 ... +1,372
-5.891 ... +54.886
N
-200 ... +1,300
-3.990 ... +47.513
R
-50 ... +1,768
-0.226 ... +21.103
S
-50 ... +1,768
-0.235 ... +18.693
T
-200 ... +400
-5.603 ... +20.872
