iTemp TMT80

Summary

Product identification

iTEMP TMT80 Universal temperature head transmitter

Application

PC programmable (PCP) temperature head transmitter for converting input signals into a scalable 4 to 20 mA analog output. Suitable for resistance thermometers (RTD) and thermocouples (TC). Device configuration is done via PC with a configuration kit and PC software.

Operating limits

• Fault signal (sensor break/short circuit): Adjustable as per NAMUR NE43.
• EMC requirements: Meets NAMUR NE21.
• Galvanic isolation: 500 V (input/output).

Feed water (Input)

• Measured variable: Temperature (temperature-linear transmission behavior).
• Resistance thermometer (RTD) measuring ranges:
  • Pt100 (IEC 60751, α = 0.00385): –200 to +850 °C (–328 to +1 562 °F), Min. span 10 K (18 °F).
  • Pt1000 (IEC 60751, α = 0.00385): –200 to +250 °C (–328 to +482 °F), Min. span 10 K (18 °F).
• RTD connection type: 2-, 3-, or 4-wire connection.
• RTD wire resistance compensation: Possible for 2-wire circuit (0 to 20 Ω).
• RTD cable resistance: Up to max. 11 Ω per wire.
• RTD sensor current: ≤ 0.6 mA.
• Thermocouples (TC) measuring ranges:
  • Type B (PtRh30-PtRh6): +40 to +1 820 °C (+104 to +3 308 °F), Min. span 500 K.
  • Type K (NiCr-Ni): –200 to +1 372 °C (–328 to +2 501 °F), Min. span 50 K.
  • Type N (NiCrSi-NiSi): –270 to +1 300 °C (–454 to +2 372 °F), Min. span 50 K.
  • Type R (PtRh13-Pt): –50 to +1 768 °C (–58 to +3 214 °F), Min. span 500 K.
  • Type S (PtRh10-Pt): –50 to +1 768 °C (–58 to +3 214 °F), Min. span 500 K.
• TC internal reference junction: Pt100.
• TC reference junction accuracy: ± 1 K.

Product water (Output)

• Output signal: Analog, 4 to 20 mA.
• Signal on alarm (underranging): Linear drop to 3.8 mA.
• Signal on alarm (overranging): Linear rise to 20.5 mA.
• Signal on alarm (sensor breakage/short-circuit): ≤ 3.6 mA or ≥ 21.0 mA (if setting ≥ 21.0 mA, an output current ≥ 21.5 mA is guaranteed). Note: Not for thermocouples.
• Load: Max. (Vpower supply - 8 V) / 0.025 A.
• Transmission behavior: Temperature linear.
• Galvanic isolation: U = 500 VAC (input/output).
• Input current required: ≤ 3.5 mA.
• Current limit: ≤ 25 mA.
• Switch-on delay: 4 s.

Electrical

• Supply voltage: Ub = 8 to 35 V, reverse polarity protection.
• Residual ripple: Permitted residual ripple Uss ≤ 3 V at Ub ≥ 15 V, f max. = 1 kHz.

Performance characteristics

• Response time: 1 s.
• Maximum measured error:
  • RTD (Pt100, Pt1000): 0.5 K or 0.15%.
  • TC (K, N): typ. 1.0 K or 0.15%.
  • TC (S, B, R): typ. 2.0 K or 0.15%.
• Influence of the supply voltage: ≤ ±0.01%/V deviation from 24 V.
• Long-term drift: ≤ 0.1 K/Year or ≤ 0.05%/Year.
• Influence of ambient temperature:
  • RTD: Td = ± [(15 ppm/K * (Upper range value - Lower range value)) + (50 ppm/K * Set measuring range)] * Δ T.
  • TC: Td = ± [(50 ppm/K * (Upper range value - Lower range value)) + (50 ppm/K * Set measuring range)] * Δ T.
• Influence of load: ≤ ±0.02%/100 Ω.
• Comparison point: Pt100, as per DIN IEC 60751 Class B (internal cold junction for thermocouples TC).

Mechanical / hydraulic

• Mounting: Terminal head in accordance with DIN EN 43 729 flat face, separate in field housing, or with clip on DIN rail as per IEC 60715.
• Orientation: No restrictions.
• Ambient temperature range: –40 to +85 °C (–40 to +185 °F).
• Storage temperature: –40 to +100 °C (–40 to +212 °F).
• Humidity: Max. rel. humidity: 95% as per IEC 60068-2-30.
• Climate class: As per IEC 60 654-1, Class C.
• Degree of protection: IP 00 (depends on installed terminal head or field housing).
• Shock and vibration resistance: 4 g / 2 to 150 Hz as per IEC 60 068-2-6.
• Electromagnetic compatibility (EMC): CE compliance. Interference immunity as per IEC/EN 61326 series, industrial requirements. Interference emission as per IEC/EN 61326 series, Class B equipment.
• Dimensions: 22.8 mm (0.9 in) height, 33 mm (1.3 in) width, Ø44 mm (1.73 in) diameter.
• Weight: Approx. 40 g (1.41 oz).
• Materials: Housing: Polycarbonate (PC). Terminals: nickel-plated brass. Potting: WEVO PU 403 FP/FL.
• Terminals: Screw terminals, wires up to max. 1.75 mm² (15 AWG) or 1.5 mm² (16 AWG) with wire end ferrules.

Operability

• Remote operation: Configuration using PC operating program ReadWin 2000.
• Configurable parameters: Sensor type, connection type (2-, 3-, or 4-wire), measuring unit (°C, °F), measuring range limits, wire resistance compensation (0 to 20 Ω for RTD 2-wire), failsafe mode, zero point offset (–9.9 to +9.9 K).

Accessories

• Device-specific: Mounting kit (order code: 51001112), DIN rail adapter clip (order code: 71528231), Field housing TAF10 (order code: TAF10).
• Communication-specific: FXA291 Commubox (order code: 51516983), TXU10-AA (order code: TXU10-...). ReadWin 2000 software is available for free download.
• Service-specific: Applicator software (web or CD-ROM).

Disclaimer

This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror