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Miniature Head Mount Temperature Transmitters with RFID Communications

$50.45

Item# TX402

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Quantity Price each
1-4 $50.45
5-9 $47.93
10-24 $46.92
25-49 $44.90
50-99 $43.89
100+ $42.88

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Lead Time ( If not in Stock): 4 weeks

Miniature Head Mount Temperature Transmitters with RFID Communications TX402 TX402
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  • TX401 Accepts Pt100, Pt1000 or Ni100 RTD Inputs
  • TX402 Accepts Pt100 or Ni100 RTD Inputs and Types J/K/T/E/R/S/B/N Thermocouples
  • User Configurable via TX400-RFID (NFC) Programmer and Configuration Software
  • High Accuracy
  • 16-Bit Conversion
  • Linearized
  • UL Approved
  • FREE Downloadable RF Programmer Configuration Software from OMEGA
  • Transmitters Have Non-Volatile Memory (Circular Buffer) for Data-Logging with User-Selectable Sampling Time

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Input Type
Input Ranges
Output Type
Supply Voltage Type
Isolation
Programability
Additional Feature


Product Specs

  • Accuracy Value BWUNmV
  • Form Factor DIN/B head
  • Maximum Ambient Temperature 85 {C} (185 {F})
  • Minimum Ambient Temperature -40 {C} (-40 {F})
  • Maximum Storage Temperature 85 {C} (185 {F})
  • Minimum Storage Temperature -40 {C} (-40 {F})
  • RTD Connection 2
  • RTD Curves Supported a = 0.00385
  • Form Factor DIN/B head
  • Accuracy Value BWUNmV
  • Maximum Storage Temperature 85 {C} (185 {F})
  • Maximum Ambient Temperature 85 {C} (185 {F})
  • Minimum Ambient Temperature -40 {C} (-40 {F})
  • Minimum Storage Temperature -40 {C} (-40 {F})
  • RTD Connection 2
  • RTD Curves Supported a = 0.00385

The TX401 and TX402 head mount temperature transmitters transform a temperature signal acquired from a Pt100, Pt1000 (TX401 only) or Ni100 RTD sensor or from a thermocouple (TX402 only) into a linearized 2-wire loop-powered 4 to 20 mA output. The characteristics of these converters ensure high precision on the reading scale with 16-bit conversion. The 4 to 20 mA output can be scaled based on the desired temperature input range.

The programming procedure uses an RFID (NFC) mode with the dedicated TX400-RFID programmer that allows the user to make all calibrations and settings quickly and without the need to power and connect up the transmitter. Simply connect the TX400-RFID programmer to the USB port of your PC, start the RF Programmer configuration software and place the transmitter on top of the TX400-RFID programmer to establish communications.

An additional programming tool is the Omega Brand Google App - "Direct Link" relying on RFID/NFC connectivity and allowing straightforward programming without wirings by Android devices.

These temperature transmitters are also provided with a data logging function for the input signal. Transmitters have a non-volatile memory (circular buffer) for data-logging with user-selectable sampling time. The user selects the sampling time (1 to 3600 seconds) and then each time the 4 to 20 mA loop powers the device, the input value is stored to nonvolatile memory.

Using the TX400-RFID programmer along with the RF Programmer configuration software (software is a free download from OMEGA) the user can:
     Completely configure the transmitter including scaling the 4 to 20 mA output to desired temperature input range
     Implement field calibration to compensate for gain and offset errors
     Download logged data to PC for visualization and printing

Specifications
RTD Input Types and Ranges:
    TX401, TX402: Pt100 (a = 0.00385), 2, 3, or 4-wire connection: TX401: -200 to 800°C (-328 to 1472°F), TX402: -200 to 600°C (-328 to 1112°F)
    TX401 Only: Pt1000 (a = 0.00385), 2-wire connection; -200 to 800°C (-328 to 1472°F)
    TX401, TX402: Ni100 (a = 0.00618), 2, 3, or 4-wire connection: TX401: -50 to 170°C (-58 to 338°F), TX402: -60 to 180°C (-76 to 356°F)
Thermocouple Input Types (TX402 Only): J/K/T/E/R/S/B/N/mV
Output Resolution: 1 µA
Over-Range Output: FS + 5°C
Under-Range Output: FS - 5°C
Output Error (Failure): Selectable: TX401: between 21.5 or 3.8 mA, TX402: between 21 or 3.8 mA
Current Output Protection: 30 mA approx
Rejection: 50 to 60 Hz
Maximum Transmission Error: 0.1% FS or 0.2°C whichever is greater
Sampling Time: 300 msec
Response Time (10 to 90%): 600 msec
Non-Volatile Memory (Circular Buffer) for Data Logging:
    TX401: 3966 Data Points
    TX402: 2546 Data Points
Cable Resistance: 20Ω max
Temperature Coefficient: <100 ppm
Power: 2-wire loop powered; operating range 6 to 32 Vdc
Isolation:
    TX401: Non-isolated
    TX402: galvanic, 1 KVac input/output
Operating Environment: -40 to 85°C (-40 to 185°F), 30 to 90% RH (non condensing)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Mounting: DIN/B head
Enclosure Material: Nylon (PA66)
Enclosure Rating: NEMA 1 (IP20) according to CE, EN 61000-6-4, EN 61000-6-2
Programming: Wireless with RFID technology (NFC)
Software: Windows® XP/7/8 (32-bit and 64-bit), Windows 10 (64-bit)
Connection: Screw terminals
Weight: 30 g (1.05 oz) approx
Dimensions: 23 H x 45 mm dia (0.9 x 1.77")

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What is the maximum allowable load resistance in the 4-20 mA loop? Is there a formula for computing this maximum resistance?

Asked by: Gerson
It would be dependent on your supply Voltage but here are the equations to calculate - MAX impedance of input where you connect transmitter 0-20 mA depends on supply voltage, Formula is: Zmax =((VCC &ndash; VCCmin) / 0.021) VCC = supply voltage for the transmitter VCC min = 8 VOLT (MINIMUM operating voltage of transmitter 6V + 2V safety margin) 0.021 = max Ampere value obtainable from transmitter for anomaly notice At operating voltage 24V_VCC &gt;&gt; Zmax = approx 750ohm
Answered by: ANBENG
Date published: 2019-11-06
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