Endress+Hauser M TST90 Specifications

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Technical Information TI093T/02/en No. 71108018
RTD Thermometer
omnigrad TST90
Process thermometer - Building automation Ø 6 mm M.I. replaceable inset Straight and Reduced Tip - Matched pairs
TST90 RTD thermometer assembly includes a replaceable single Pt100 inset in mineral insulated cable, a terminal head and a thermowell. The inset is equipped with special matched Pt100 for thermal energy measurement. The terminal head can be selected from a wide choice of standard items (see the Order key or the TA20 Technical Information for more details). The thermowell can be delivered with a reduced tip for fast response time. TST90 is always delivered in matched pairs.
Application
Typical application can be found in heat exchangers for inlet and outlet differential temperature measurement. The thermal energy can be calculated knowing ΔT between inlet and outlet, flowrate and other parameters.
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Technical data
omnigrad TST90
Mineral insulated replaceable inset
Version: TET90 Sensing element: Platinum resistance, 1 Pt100 Ω at 0°C, thinfilm type Tolerances: matched pairs, ±0.05 K (0÷120°C) or ±0.1 K (-40÷0°) Wiring: 2 or 4 wire connections Insulation resistance:
100 MΩ , test voltage 250 V at ambient temperature
Electrical connections: terminal block Stem: mineral insulated cable (MgO) Sheath: AISI 316L/W.1.4404 Standard diameter: 6 mm straight tip type or 3x50 reduced tip type Operating temperature: -50 ... +200 °C
IL
Response time values: according to IEC751 in moving water at 0.4 m/s
= 24 s ; T90 =72 s (straight tip)
T
50
T50 = 7.5 s; T90 = 20.5 s (reduced tip)
Internal resistance: for 2 wire electrical connection compensation
0.06 Ω/m for each single conductor (straight tip)
0.12 Ω/m for each single conductor (reduced tip)
Replacement: inset length IL is calculated as follows
d 6
TET inset
sensing length
=
25 m m
IL = L + 155 mm
Protecting tube Version: TA10 thermowell
Standard diameter: 9x7 mm Reduced tip: see drawing next page Standard material: AISI 316Ti/W.1.4404 Connection to head: M24 x 1.5 Process connection: G 1/2" - M Max. operat. condition: 50 bar @ 20°C; 1 bar @ 400°C
Terminal head Version, protection class and electrical connection: refer to order key
2 Endress+Hauser
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omnigrad TST90
For inset replacement see
Technical data
Accuracy statement is referred to
the replaceable inset only as defined by IEC 751 without any protecting thermowell which may introduce thermal drift due to process connection heat dissipation in conjuction to short immersion lengths. For a correct temperature measurement the thermowell immersion length must be 20 times its diameter. Shorter immersion lengths can be supplied but the thermometer requires an external (process connection, neck and connection head) thermal insulation.
Order key
TST90- RTD THERMOMETER - Building automation
Ø 6 mm M.I. replaceable inset - Straight and Reduced Tip - Matched pairs
Material of the thermowell
1 AISI 316TI-W1.4571 9 Material to specification
Insertion Length L (75-3700mm)
U 100 mm insertion length D 160 mm insertion length F 250 mm insertion length K 400 mm insertion length X mm insertion length to spec. Y mm special insertion length
Sensor material
1 Thermowell AISI 316TI-W1.4571 9 Thermowell material to spec.
Shape of the tip
S Straight tip, standard response T Reduced tip, fast response
Type of terminal
3 Terminal block 9 To specification
Class and type of inset
1S2 1 Pt100, 2 wire, cal. 0,05K (0 - 120 °C) 1S4 1 Pt100, 4 wire, cal. 0,05K (0 - 120 °C) 1U4 1 Pt100, 4 wire, cal. 0,1K (-40 - 0 °C) 9Y9 To specification
Ter mi nal he ad
A TA20A:M24 bottom, Pg16 Grey, IP67 B TA20B:M24 bottom, Pg16 Grey, IP67 D TA20D:M24 bottom, Pg16 Grey, IP66 Y To specification
TST90- Complete Order Code
Endress+Hauser 3
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S upplementary
Documentation
Technical Information TET90 Ø6 mm M.I. Inset (TI 225T/02/en)
Technical Information TA20 terminal heads (TI 072T/02/en)
TI093T/02/en/04.01 FM+SGML 6.
0 No.: 71108018
Endress+Hauser Gmbh+Co. Instruments International P.O. Box 2222 D-79574 Weil am Rhein Germany
Tel. (07621) 975-02 Tx 773926 Fax (07621) 975 345 http://www.endress.com info@ii.endress.com
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