Loop-powered RTD Xmitter for DIN B Heads

Two wires carry power & output current signal simultaneously


Stamford CT, USA –?? The TX33 is an analog, non-isolated, 2-wire head-mounted temperature transmitter that converts the RTD input into a proportional, linear, and highly accurate 4 to 20 mA output current in a variety applications such as process control, data acquisition, automation system, and energy source management.

The transmitter setup by means of a 6 dip-switch array for the coarse range setting, and two multi-turn potentiometers (Zero and Span) which are used for the final fine tuning.

It is housed in a metal enclosure with plastic top cover, fitting into DIN B connection heads that provides excellent RFI immunity.

This unit also accepts low level signal from an RTD, filters, amplifies, and convert it to process current to reduce susceptibility to transients and spurious noise from nearby electrical operating equipment.

Further, it?? allows the same two wires to carry the transmitter power and output current signal simultaneously.

SPECIFICATIONS: (VLOOP = 24 VDC, TAMB = 23??2??C, RLOAD = 250 ?)

Output: 4 to 20 mA; Upscale < 25 mA; Downscale < 3.0 mA
Loop Power: 10 to 32 Vdc. Reverse polarity protected,
Input RTD: Pt100, 2- or 3-wire DIN. 43760, BS1904 characteristics
Max Sensor Wire resistance: 30 ?/wire
Supply Voltage Effect: ??0.01% of span/Volt
Temperature Coefficient: ??0.01% of span/??C(200??C measurement range)
Linearity Error: ??0.15% of span ??0.1??C
Repeatability: ??0.01 % of span
Load Capability: 50 x (loop power-10) ?
Input Zero Range: -50 to 50??C, (-58 to 122??F) adjustable
Span: 50 to 200??C selectable
Fine Adjustment: 5% of ZERO and SPAN
RFI Effect (5W, 470 MHz): < ??10% of span
Response Time (0 to 90%): 200 ms
Housing Material: Polycarbonate, UL94-V0 grade
Connection: M3 Screw, AWG 14-22
Operation Environment: -40 to 85??C; (-40 to 185??F) 5 to 85 %, non-condensing
Dimensions: 45 Dia. x 20 mm H (1.77 x 0.79″)
Weight: 50 g (1.8 oz)

For more information and to order, visit www.omega.com/pptst/TX33.html

OMEGA Engineering, INC.
One Omega Drive
Stamford, Connecticut 06907-0047 USA
P.O. Box 4047

Tel: (Toll-free 800-848-4286) or +1 (203)-359-1660
Fax: +1 (203)-359-7700
Email: temp [at] omega.com
Web: www.omega.com