WIKA TR10-B - Handbuch (Seite 10)

3132465.01 07/2011 GB/D
10 WIKA operating instructions resistance thermometers per EN 14597
GB
Resistance values and tolerance values with selected temperatures (Pt100)
Temperature
in °C (ITS 90)
Resistance value in Ω
Class B Class A Class AA
-196 19.69 ... 20.80 - -
-100 59.93 ... 60.58 60.11 ... 60.40 -
-50 80.09 ... 80.52 80.21 ... 80.41 80.23 ... 80.38
-30 88.04 ... 88.40 88.14 ... 88.30 88.16 ... 88.28
0 99.88 ... 100.12 99.94 ... 100.06 99.96 ... 100.04
20 107.64 ... 107.95 107.72 ... 107.87 107.74 ... 107.85
100 138.20 ... 138.81 138.37 ... 138.64 138.40 ... 138.61
150 156.93 ... 157.72 157.16 ... 157.49 157.91 ... 157.64
250 193.54 ... 194.66 193.86 ... 194.33 193.91 ... 194.29
300 211.41 ... 212.69 211.78 ... 212.32 -
450 263.31 ... 265.04 263.82 ... 264.53 -
500 280.04 ... 281.91 - -
600 312.65 ... 314.77 - -
This table represents the calibration process with predefined temperatures.
This means if a temperature standard is available, the resistance value of the test piece must lie within the
limits specified above.
3.2 Instrument requirement per EN 14597
WARNING!
Follow the requirements of EN 14597 "Temperature control devices".
The devices are only certified as a unit (thermometer in conjunction with a model TW35X
thermowell). The approval is only valid for measurements in liquids, e.g. water, oil.
IP ingress protection (e.g. the cable gland in conjunction with the lead)
at least IP 40 per EN 60529
Minimum immersion depth (medium)
80 mm
Nominal pressure rating for the thermowell
PN = 40 bar at T
max
= 400 °C
Maximum ambient temperature for the connection head:
T
u
= 100 °C
Possible temperature restriction through use of a cable gland/connecting cable. The lowest
value is always used.
Time constant
< 25 seconds at 0.3 m/s tip velocity
For further specifications see relevant WIKA data sheet or order documentation.
3. Specifications