WIKA TR21 Mode D'emploi page 27

13. Specifications
Process connection
Protection tube model TW22 (TR21-A, TR21-C)
Protection tube diameter
Surface roughness
Connection to thermometer
Insertion length U
1
Material (wetted)
Protection tube model TW61 (TR21-B)
Surface roughness
Connection to thermometer
Material (wetted)
1) For the TR21-A design without protection tube, the insertion length is defined by the dimension l
The thickness of bottom of the protection tube can be neglected for dimensioning. It is offset by the spring travel of the
measuring insert.
Output signal (4 ... 20 mA version)
Analogue output
Load R
A
Factory configuration
Measuring range
Current signals for error signalling
Current value for sensor short-
circuit
WIKA operating instructions model TR21
6 mm
■
Protection tube tip stepped down to 4.5 mm (from U
■
R ≤ 0.76 µm (SF3 per ASME BPE)
■
a
R ≤ 0.38 µm (SF4 per ASME BPE)
■
a
R ≤ 0.38 µm electropolished (SF4 per ASME BPE)
■
a
Model TR21-A: G 3/8"
Model TR21-C: welded
25 mm
1)
■
50 mm
■
75 mm
■
100 mm
■
150 mm
■
200 mm
■
Stainless steel 1.4435 (316L, UNS S31603)
Per DIN 11866 row A, B
Per DIN 11866 row C,
ASME-BPE
G 3/8"
Per DIN 11866 row A, B
Per DIN 11866 row C,
ASME-BPE
4 ... 20 mA, 2-wire
R ≤ (U
A
The permissible load depends on the loop supply voltage.
For communication with the instrument with programming
unit PU-548, a max. load of 350 Ω is admissible.
Measuring range 0 ... 150 °C [32 ... 302 °F]
Other measuring ranges are adjustable
Configurable in accordance with NAMUR NE 043
downscale ≤ 3.6 mA
upscale ≥ 21.0 mA
Not configurable in accordance with NAMUR NE 043
downscale ≤ 3.6 mA
R
■
a
R
■
a
R
■
a
R
■
a
Stainless steel 1.4435
Stainless steel 316L
- 10 V) / 23 mA with R
B
> 25 mm)
1
< 0.8 μm
< 0.4 μm electropolished
< 0.76 μm
< 0.38 μm electropolished
(see "Dimensions in mm").
1
in Ω and U in V
A B
EN
27