Head Mount Thermocouple Transmitter W/ Process Output

The Model TX31 is an analog, isolated 2-wire head-mounted temperature transmitter that converts thermocouple input to the voltage, which is generated by the thermocouple sensor, linear, and highly accurate 4 to 20 mA output current.

The transmitter comes in a variety of applications such as process control, automation system, and energy source management. The TX31 is performed by means of a DIP-switch array for coarse range setting, and 2 multi-turn potentiometers (ZERO and SPAN) which are used for the final finetuning.

The TX31 is housed in a metal enclosure with a plastic top cover, fitting into DIN B connection heads, providing excellent RFI immunity. The TX31 accepts low level signal from the thermocouple, filtered, amplified, and converter process current to reduce susceptibility transients and noise operations while allowing the same 2 wires to carry the transmitter power and output current signal simultaneously.

Specifications (V_LOOP = 24 VDC, T_AMB =23±2°C, R_LOAD = 250 Ω)
Output: 4 to 20 mA; Upscale < 26 mA, Downscale <3.8 mA
Loop Power: 12 to 32 Vdc; Reverse polarity protected
Input Thermocouple:Types J, K, E, T, R, S, or B
Supply Voltage Effect: ±0.01%/V
Temperature Coefficient: ±0.02% /°C (Tamb = 5 to 50°C )
Repeatability: ±0.01% of voltage input span
Linearity Error: ±0.1% of voltage input span (not temperature input)
Galvanic Isolation: Input/output 1000 Vrms, continuous
Cold-Junction Compensation: ±2°C max (T_amb = 5 to 50°C)
Load Capability: 50 x (loop power – 12) Fine Adjustment: 5% of zero & span
RFI effect (5W, 470 MHz): < ±10% of span
Response time (0 to 90%): 200 ms
Housing Material: Cast aluminum with epoxy coating and polycarbonate, UL94-V0 grade
Connection: M3, nickel coated brass; 22 – 12 AWG
Operation Environment: -20 to 70°C; 5 to 85 %, non-condensing
Dimensions: 27 H x 45 mm Dia. (1.06 x 1.77″)
Weight: 65 g (2.3 oz)