Model TR21-C Miniature Resistance Thermometer

Brand: WIKA Alexander Wiegand SE & Co. KG

The model TR21-C resistance thermometer provides temperature measurement in sanitary applications and can be used for the measurement of liquid and gaseous media in the range of -30 to 250 °C (-22 to 482 °F). For application in hazardous areas, intrinsically safe versions are available.
Features
  • Compact design for space-saving fitting
  • Simple and fast electrical connection via M12 x 1 plug connector
  • With direct sensor output (Pt100/Pt1000 in 3 or 4-wire version) or integrated transmitter with 4-20 mA output signal, individually parameterisable with free-of-charge WIKAsoft-TT PC configuration software
  • Materials and surface finish quality in accordance with standards of hygienic design

Specifications

Temperature Range

  • -30° to +150° C (-22° to +302° F), -30° to +250° C (-22° to +482° F)

Measuring Element

  • Face-sensitive Pt1000
  • Pt1000

Connection Method

  • 2-Wire: The lead resistance is recorded as an error in the measurement.

Tolerance Value of the Measuring Element 3) Per IEC 60751

  • Class A

Measuring Span

  • Minimum 20 K, Max. 300 K

Measuring Deviation of the Transmitter Per IEC 60770

  • ± 0.25 K

Total Measuring Deviation in Accordance with IEC 60770

  • Measuring deviation of the measuring element + the transmitter

Basic Configuration

  • Measuring Range 0 ... 150° C (32 ... 302° F), other Measuring Ranges are Adjustable

Analogue Output

  • 4 ... 20 mA, 2-Wire

Linearisation

  • Linear to Temperature per IEC 60751

Linearisation Error

  • ± 0.1 %

Switch-On Delay, Electrical

  • Maximum 4 s (Time before the first measured value)

Warming-up Period

  • After approximately 4 minutes, the instrument will function to the specifications (accuracy) given in the data sheet.

Current Signals for Error Signalling

  • upscale ≥ 21.0 mA
  • Configurable in accordance with NAMUR NE43
  • downscale ≤ 3.6 mA

Sensor Short-Circuit

  • Not configurable, in accordance with NAMUR NE43 downscale ≤ 3.6 mA

Sensor Current

  • < 0.3 mA (Self-Heating can be ignored)

Load RA

  • RA ≤ (UB - 10 V) / 23 mA with RA in Ω and UB in V

Effect of Load

  • ± 0.05 % / 100 Ω

Power Supply UB

  • DC 10 ... 30 V

Maximum Permissible Residual Ripple

  • 10 % generated by UB < 3 % ripple of the output current

Power Supply Input

  • Protected Against Reverse Polarity

Power Supply Effect

  • ± 0.025 % / V (Depending on the Power Supply UB)

Electromagnetic Compatibility (EMC)

  • EN 61326 emission (Group 1, ClassB) and interference immunity (Industrial application) , configuration at 20 % of the full Measuring Range

Temperature Units

  • Configurable °C, °F, K

Info Data

  • Tag No., description and user message can be stored in transmitter

Configuration & Calibration Data

  • Permanently stored

Response Time (per IEC 60751)

  • t50 < 3.3 s t90 < 9.7 s

Electrical Connection

  • M12 x 1 Circular Connector (4-Pin)

Autoclavability (Option)

  • Autoclavable with Mounted Protection Cap at Connecting plug (For further information see “Ambient conditions”)

Explosion Protection (Option)

  • Intrinsically safe to Ex i (ATEX) gas/dust (For further information see “Further Specifications for explosion-protected version”)

  • Sanitary applications
  • Food industry and beverage industry
  • Pharmaceutical industry, production of active ingredients
  • Biotechnology and Life-Science-Engineering
  • Creamery, brewery

show more