WILKERSON INSTRUMENT CO., INC.

TW303 RTD Input Two-Wire Transmitter

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TW303

TW303
RTD Input
Two-Wire Transmitter

$158.00

The following information must be entered to complete your order:
See "Specifications" below for Input range limits.

Input: Zero Scale
Full Scale
Units
  RTD Element Type

Quantity:

 

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Specifications
 
  • Features
  • Description
  • Specifications
  • Dimensions
  • Connections
  • Provides DC Output Proportional to an RTD Input
  • 3-Wire or 2-Wire, 100 ohms to 2000 ohms RTDs
  • Linearized for Platinum RTDs
  • Unlimited Choice of Input Ranges (Within specified range limits)
  • 50 mm X 50 mm Case
  • Low-Drift Chopper-Stabilized Input
  • NEMA-4 Connection Head and Explosion-Proof Housing Available
  • Low Cost
  • 5 Year Warranty

The TW303 is a low-cost, reliable, RTD input, 2-Wire transmitter for field or panel mounting in various industrial housings and enclosures. It provides a DC output current proportional to an RTD input signal.

All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning. Optional conformal coating of the electronic components makes the TW303 extremely reliable and resistant to the corrosion, moisture and fungus associated with many industrial environments.

The module utilizes a single constant current source to excite the RTD. An accurate and stable leadwire compensation circuit uses the third lead of the 3-Wire RTD to compensate for the RTD lead resistance. The output ZERO and SPAN controls are accessible through the top of the case. Terminations are made to screw terminal connectors on the top of the case.

TYPICAL APPLICATION
Remote temperature data acquisition.

RTD INPUT
3-wire or 2-wire, 100 ohms to 2000 ohms

INPUT RANGE
max span RTD limit
min span 50°F/ 28°C

EXCITATION CURRENT

RTD Type Current
100 ohm
500 ohm
1000 ohm
2000 ohm
1 mA
1 mA
0.5 mA
0.2 mA

OUTPUT RANGE
4/20 mA

MAX LOAD RESISTANCE
Rmax= [(Vsupply - 12)/20 mA] kilohms

RESPONSE TIME
50 ms typical

OPEN SENSOR RESPONSE
Upscale

ACCURACY
±0.1% of span or 0.02 ohms, whichever is greater

LINEARITY
(Pt RTD, output vs temp)
±0.05% of span  (temp > = 32°F/0°C)
±0.15% of span (temp < 32°F/0°C)
(Others, output vs res) ±0.01% of span

COMMON MODE REJECTION
120 dB, DC to 60 Hz

OPERATING TEMPERATURE
-13°F to 176°F/-25°C to 80°C

TEMPERATURE STABILITY
±0.02% of span or 0.025°C/°C, whichever is greater

POWER
12-48 VDC, polarity protected

SUPPLY VOLTAGE EFFECT
0.02% of span max, 12 to 48 V

TW300 Series Dimension Drawing

PIN 1
PIN 2
PIN 3
PIN 4
PIN 5
Power Supply +
Power Supply -
Excitation / RTD +
RTD -
Lead Compensation
Specifications    Manual

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