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Model TR21-B Miniature Resistance Thermometer
Brand: WIKA Alexander Wiegand SE & Co. KGThe model TR21-B 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 150 °C (-22 to 302 °F). For application in hazardous areas, intrinsically safe versions are available.
Features- Sensor can be calibrated without having to open the process.
- 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.
- Wetted parts from stainless steel 1.4435.
- Self-draining and dead-space minimised, materials and surface finish qualities in accordance with standards of hygienic design.
Specifications
Temperature Range
- -30° to +150° C (-22° to +302° 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
- downscale ≤ 3.6 mA
- Configurable in accordance with NAMUR NE43
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)
Influence of the Ambient Temperature
- 0.1 % of Span / 10 K Ta
Electromagnetic Compatibility (EMC)
- EN 61326 emission (Group 1, ClassB) and interference immunity (Industrial application) 5), 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 < 3.2 s t90 < 7.3 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 and beverage industry
- Bio and pharmaceutical industry, production of active ingredients
