EN
WIKA operating instructions models TR31-3, TR31-K
14096788.08 02/2022 EN/DE/FR/ES
31
Accuracy specifications (4 ... 20 mA version)
Linearisation
Linear to temperature per IEC 60751
Output error
±0.1 %
2)
Reference conditions
Ambient temperature T
a
ref
23 °C
Supply voltage U
B
ref
DC 12 V
1)
Depending on the process connection, the deviation can be bigger.
2) ±0.2 % for start of measuring range less than 0 °C [32 °F]
Example calculation: Total measuring deviation
(measuring range 0 ... 150 °C, load 200 Ω, supply voltage 16 V, ambient
temperature 33 °C, process temperature 100 °C)
Sensor element (class A per IEC 60751: 0.15 + (0.0020(t))):
±0.350 K
Measuring deviation of the transmitter ±0.25 K:
±0.250 K
Output error ±(0.1 % of 150 K):
±0.150 K
Influence of load ±(0.05 % / 100 Ω of 150 K):
±0.150 K
Influence of supply voltage ±(0.025 % / V of 150 K):
±0.150 K
Influence of ambient temperature ±(0.1 % / 10 K T
a
of 150 K):
±0.150 K
Measuring deviation (typical)
sqrt (0.35 K² + 0.25 K² + 0.15 K² + 0.15 K² + 0.15 K²+ 0.15 K²)
sqrt (0.275 K²) = 0.524 K
Measuring deviation (maximum)
0.35 K + 0.25 K + 0.15 K + 0.15 K + 0.15 K + 0.15 K = 1.2 K
Measuring range
Temperature range
Version 4 ... 20 mA
(model TR31-x-x-TT)
Without neck tube -30 ... +150 °C [-22 ... +302 °F]
With neck tube -30 ... +250 °C [-22 ... +482 °F]
1) 2)
Version with FKM O-ring: -20 ... +125 °C
[-4 ... +257 °F]
Version Pt100
(model TR31-x-x-Px) /
Pt1000 (model TR31-x-x-Sx)
Class A Without neck tube -30 ... +150 °C
[-22 ... +302 °F]
With neck tube -30 ... +250 °C
[-22 ... +482 °F]
2)
Version with FKM O-ring: -20 ... +125 °C
[-4 ... +257 °F]
Class B Without neck tube -50 ... +150 °C
[-58 ... +302 °F]
With neck tube -50 ... +250 °C
[-58 ... +482 °F]
2)
Unit (4 ... 20 mA version)
Configurable °C, °F, K
Temperature at the connec-
tor (Pt100, Pt1000 version)
Max. 85 °C [185 °F]
Measuring span
(4 ... 20 mA version)
Minimum 20 K, maximum 300 K
1)
The temperature transmitter should therefore be protected from temperatures over 85 °C [185 °F].
2)
Version with mineral-insulated sheathed cable can be used up to 300 °C [572 °F].
Process connection
Type of process connection
■
G ¼ B
■
G ⅜ B
■
G ½ B
■
¼ NPT
■
½ NPT
■
M12 x 1.5
■
M20 x 1.5
■
7/16-20 UNF-2A
Protection tube
Protection tube diameter
■
3 mm [0.12 in]
■
6 mm [0.24 in]
12. Specifications