EN
34
WIKA operating instructions, models TRxx and TCxx
14150915.08 04/2024 EN/DE/FR/ES
The combinations of a 2-wire connection with class A or class AA are not permissible,
since the lead resistance of the MIMS cable and the connection lead negates the higher
sensor accuracy.
Maximum probe length including connection cable:
■
Class B, 3-wire connection: ~ 30 m [98 ft]
■
Class A, 3-wire connection: ~ 10 m [33 ft]
■
Class AA, 3-wire connection: ~ 3 m [10 ft]
Longer probe/cable lengths should be designed with a 4-wire connection, since this
connection method has no length effect on the accuracy.
→ For detailed specifications for Pt100 sensors, see technical information IN 00.17 at
www.wika.com.
The table shows the temperature ranges listed in the respective standards, in which the
tolerance values (class accuracies) are valid.
Measuring element of thermocouple
Type of measuring element Thermocouple per IEC 60584-1 or ASTM E230
Types K, J, E, N, T
Probe tip design (measuring
location)
Ungrounded (measuring
location welded isolated,
standard)
Grounded (measuring
location not isolated, welded
to the bottom)
Thermocouple
Sheath
Measuring location
Thermocouple
Sheath
Measuring location
Validity limits of the class accuracy in accordance with IEC 60584-1
Type K Class 2 -40 ... +1,200 °C [-40 ... +2,192 °F]
Class 1 -40 ... +1,000 °C [-40 ... +1,832 °F]
Type J Class 2 -40 ... +750 °C [-40 ... +1,382 °F]
Class 1 -40 ... +750 °C [-40 ... +1,382 °F]
Type E Class 2 -40 ... +900 °C [-40 ... +1,652 °F]
Class 1 -40 ... +800 °C [-40 ... +1,472 °F]
Type N Class 2 -40 ... +1,200 °C [-40 ... +2,192 °F]
Class 1 -40 ... +1,000 °C [-40 ... +1,832 °F]
Type T Class 2 -40 ... +350 °C [-40 ... +662 °F]
Class 1 -40 ... +350 °C [-40 ... +662 °F]
9. Specifications
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