TMT181 Temperature Transmitter
Universal integrated temperature transmitter for RTD, thermocouple, resistance, and voltage signal inputs. Configurable and installable inside the sensor From B.
TMT181 Temperature Transmitter
Features
The TMT181 temperature transmitter is a PC-configurable intelligent temperature transmitter that accepts 2, 3, or 4-wire RTD, thermocouple, resistance, or millivolt inputs.
It linearizes the input signal and outputs a 4–20mA standard signal, with user-definable measuring ranges. It features electrical isolation, and preset signals for sensor damage and
short-circuit faults.
? PC-configurable integrated temperature transmitter for converting input signals to 4–20 mA output signals;
? Inputs: 2, 3, or 4-wire RTD, thermocouple, resistance, or millivolt signals
? Online configuration via PC using the TMT 181A configuration tool
The iTEMP Pt TM 181 temperature transmitter is a two-wire transmitter with analog output, accepting 2, 3, or 4-wire RTD, thermocouple, resistance, or millivolt signals.
Configure the TMT180 using the TMT181A setting tool.
Measured values: 2, 3, or 4-wire RTD, thermocouple, resistance, or millivolt
Measuring range: Set via PC with a dedicated interface
? Output signal: Analog 4–20 mA, 20–4 mA
? Transmission characteristic: Temperature linear
? Alarm signals: Output drops to 3.8 mA below the measuring range
Output rises to 20.5 mA above the measuring range
Sensor damage; sensor short circuit ≤3.6 mA or ≥21.0 mA
? Load: max. (V supply -10V)/0.022A (current output)
? Input current: ≤3.5 mA
? Current limiting: ≤23 mA
? Switching delay: 4s (Ia=3.8 mA during power-up)
Power supply: U = 10–35V, with polarity protection
Supply voltage fluctuation: Allowed fluctuation USS ≤3V (when Ub ≥13V, fmax=1 kHz)
Response time: 1s
Reference conditions: Calibration temperature +23℃ (73.4°F) ±5K
Measurement error: ≤0.08%
Supply voltage effect: ≤±0.01%/V deviation from 24V
Ambient temperature effect (temperature drift): Td=±(15ppm/K*(max. measuring range+200)+50ppm/K*set measuring range)*△θ
△θ = Deviation of ambient temperature from reference temperature
Long-term stability: ≤0.1K/year or 0.05%/year
Load effect: ≤±0.02%/100Ω