{"product_id":"mtl4073-mtl4000-series-programmable-temperature-transmitter","title":"MTL4073 MTL4000 Series Programmable Temperature Transmitter","description":"\u003ch3\u003e\u003cstrong\u003eMTL4073 | Intelligent Thermocouple and RTD Temperature Transmitter\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0070c0;\"\u003e\u003cstrong\u003eMTL4073\u003c\/strong\u003e\u003c\/span\u003e is a programmable temperature transmitter from the \u003cstrong\u003eMTL4000 Series\u003c\/strong\u003e. It converts low-level temperature sensor signals from hazardous areas into standard 4–20 mA outputs.\u003c\/p\u003e\n\u003cp\u003eThe module supports eight thermocouple types and 2-, 3-, and 4-wire platinum RTDs. It provides configurable linearization, measurement ranging, cold junction compensation, signal monitoring, and sensor failure handling.\u003c\/p\u003e\n\u003cp\u003eEngineers configure the unit through a personal computer using MTL PCS45 software and a PCL45 interface. This approach allows users to adjust measurement characteristics without changing the field sensor architecture.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eMTL4073\u003c\/strong\u003e provides a single-channel solution for transferring temperature measurements into safe-area control systems. Its intrinsically safe design supports temperature monitoring in classified industrial environments.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e01 | Sensor Input Architecture\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe MTL4073 accepts two main categories of temperature sensor signals:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA. Thermocouple Inputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType J\u003c\/li\u003e\n\u003cli\u003eType K\u003c\/li\u003e\n\u003cli\u003eType T\u003c\/li\u003e\n\u003cli\u003eType E\u003c\/li\u003e\n\u003cli\u003eType R\u003c\/li\u003e\n\u003cli\u003eType S\u003c\/li\u003e\n\u003cli\u003eType B\u003c\/li\u003e\n\u003cli\u003eType N\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese thermocouple inputs follow BS 4937 specifications. The module receives their low-level millivolt signals and applies the selected temperature linearization.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eB. Platinum RTD Inputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2-wire platinum RTD\u003c\/li\u003e\n\u003cli\u003e3-wire platinum RTD\u003c\/li\u003e\n\u003cli\u003e4-wire platinum RTD\u003c\/li\u003e\n\u003cli\u003eNominal resistance: 100 Ω at 0°C\u003c\/li\u003e\n\u003cli\u003eReference standards: BS 1904 \/ DIN 43760\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe module provides a nominal 200 µA excitation current for RTD measurement. Its supported wiring configurations accommodate different field installation requirements.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e02 | Measurement Performance and Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Item\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eMTL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMTL4073\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eMTL4000 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eProgrammable Temperature Transmitter \/ Signal Converter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Quantity\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermocouple Types\u003c\/td\u003e\n\u003ctd\u003eJ, K, T, E, R, S, B, N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD Compatibility\u003c\/td\u003e\n\u003ctd\u003e2-wire, 3-wire, and 4-wire platinum RTDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD Nominal Resistance\u003c\/td\u003e\n\u003ctd\u003e100 Ω at 0°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Range\u003c\/td\u003e\n\u003ctd\u003e−75 to +75 mV or 0 to 400 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal Span\u003c\/td\u003e\n\u003ctd\u003e3 to 150 mV or 10 to 400 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD Excitation Current\u003c\/td\u003e\n\u003ctd\u003e200 µA nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold Junction Compensation\u003c\/td\u003e\n\u003ctd\u003eAutomatic or selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCJC Error\u003c\/td\u003e\n\u003ctd\u003e≤1.0°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e4–20 mA nominal, direct or reverse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Load Resistance\u003c\/td\u003e\n\u003ctd\u003e600 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHC Input Accuracy\u003c\/td\u003e\n\u003ctd\u003e±15 µV or ±0.05% of input value, whichever is greater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD Input Accuracy\u003c\/td\u003e\n\u003ctd\u003e±80 mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Accuracy\u003c\/td\u003e\n\u003ctd\u003e±11 µA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTHC Input Temperature Drift\u003c\/td\u003e\n\u003ctd\u003e±0.003% of input value per °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD Input Temperature Drift\u003c\/td\u003e\n\u003ctd\u003e±7 mΩ\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Temperature Drift\u003c\/td\u003e\n\u003ctd\u003e±0.6 µA\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommon-Mode Rejection\u003c\/td\u003e\n\u003ctd\u003e120 dB at 240 V, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries-Mode Rejection\u003c\/td\u003e\n\u003ctd\u003e40 dB at 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Burnout Response\u003c\/td\u003e\n\u003ctd\u003eUpscale, downscale, or off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e20–35 V DC operating conditions specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e57 mA at 24 V; 55 mA at 20 V; 60 mA at 35 V with 20 mA signal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e1.2 W at 24 V with 20 mA signal; 2.0 W at 35 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Isolation\u003c\/td\u003e\n\u003ctd\u003e250 V AC between safe and hazardous-area circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStatus Indicator\u003c\/td\u003e\n\u003ctd\u003eGreen LED for power and status indication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration\u003c\/td\u003e\n\u003ctd\u003eMTL PCS45 software with PCL45 interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003e03 | Temperature Signal Processing and Configuration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eMTL4073\u003c\/strong\u003e offers several software-selectable functions. Engineers can configure the measurement channel according to the installed sensor and process requirements.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfiguration Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngineering Purpose\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Selection\u003c\/td\u003e\n\u003ctd\u003eSelect one of eight thermocouple types or a supported platinum RTD.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinearization\u003c\/td\u003e\n\u003ctd\u003eApply the appropriate sensor characteristic to temperature conversion.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold Junction Compensation\u003c\/td\u003e\n\u003ctd\u003eCompensate thermocouple measurements for reference junction temperature.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Ranging\u003c\/td\u003e\n\u003ctd\u003eDefine the temperature range represented by the analog output.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Direction\u003c\/td\u003e\n\u003ctd\u003eSelect direct or reverse 4–20 mA operation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBurnout Handling\u003c\/td\u003e\n\u003ctd\u003eConfigure upscale, downscale, or disabled sensor burnout response.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Damping\u003c\/td\u003e\n\u003ctd\u003eConfigure damping and smoothing according to process requirements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMonitoring and Testing\u003c\/td\u003e\n\u003ctd\u003eSupport configuration checks and channel testing.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTagging\u003c\/td\u003e\n\u003ctd\u003eStore instrument identification and description fields.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Factory Configuration:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInput sensor: Type K thermocouple.\u003c\/li\u003e\n\u003cli\u003eThermocouple linearization: Enabled.\u003c\/li\u003e\n\u003cli\u003eCold junction compensation: Enabled.\u003c\/li\u003e\n\u003cli\u003eTemperature unit: °C.\u003c\/li\u003e\n\u003cli\u003eDamping value: 0 seconds.\u003c\/li\u003e\n\u003cli\u003eSmoothing value: 0 seconds.\u003c\/li\u003e\n\u003cli\u003eOutput zero: 0°C.\u003c\/li\u003e\n\u003cli\u003eOutput span: 250°C.\u003c\/li\u003e\n\u003cli\u003eTag field: Blank.\u003c\/li\u003e\n\u003cli\u003eDescription field: Blank.\u003c\/li\u003e\n\u003cli\u003eOpen-circuit alarm: High, upscale.\u003c\/li\u003e\n\u003cli\u003eTransmitter failure alarm: Low, downscale.\u003c\/li\u003e\n\u003cli\u003eCold junction failure alarm: Low, downscale.\u003c\/li\u003e\n\u003cli\u003ePower line frequency: 50 Hz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEngineers should review these default settings before commissioning. The factory configuration may not match the installed sensor or actual process range.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e04 | Cold Junction Compensation and SCJ01 Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThermocouple measurements require cold junction compensation when the application uses a reference junction. The MTL4073 supports automatic or selectable compensation.\u003c\/p\u003e\n\u003cp\u003eFor thermocouple installations requiring cold junction compensation, use the \u003cstrong\u003eMTL SCJ01\u003c\/strong\u003e hazardous-area connector. This accessory includes an integral cold junction compensation sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSCJ01 Integration Considerations:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProvides an integral CJC temperature sensor.\u003c\/li\u003e\n\u003cli\u003eSupports thermocouple applications requiring reference junction compensation.\u003c\/li\u003e\n\u003cli\u003eWorks with the relevant MTL4000 Series interface arrangement.\u003c\/li\u003e\n\u003cli\u003eHelps maintain thermocouple measurement accuracy.\u003c\/li\u003e\n\u003cli\u003eSpecified CJC error for the MTL4073: ≤1.0°C.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm the connector arrangement and applicable installation documentation before wiring. Do not assume ordinary terminal connections provide equivalent cold junction compensation.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e05 | Signal Accuracy and Noise Rejection\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTemperature measurement accuracy depends on the sensor, input wiring, reference compensation, and signal conversion. The MTL4073 provides specified input and output performance for engineering evaluation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThermocouple Accuracy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe calibration accuracy is ±15 µV or ±0.05% of the input value, whichever is greater. This specification includes hysteresis, non-linearity, and repeatability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRTD Accuracy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe specified RTD input calibration accuracy is ±80 mΩ. The nominal excitation current is 200 µA.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOutput Accuracy\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe analog output calibration accuracy is ±11 µA. Engineers should include this contribution when calculating the complete measurement loop error.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInterference Rejection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCommon-mode rejection: 120 dB at 240 V, 50\/60 Hz.\u003c\/li\u003e\n\u003cli\u003eSeries-mode rejection: 40 dB at 50\/60 Hz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese specifications support evaluation of electrical interference in industrial instrumentation environments. Proper cable routing and termination remain important for reliable measurements.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e06 | Hazardous-Area Safety and Entity Parameters\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor Location\u003c\/td\u003e\n\u003ctd\u003eZone 0, IIC, T4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American Classification\u003c\/td\u003e\n\u003ctd\u003eDivision 1, Group A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminals 5 and 6\u003c\/td\u003e\n\u003ctd\u003eNon-energy-storing apparatus: ≤1.2 V, ≤0.1 A, ≤20 µJ, and ≤25 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminals 5 and 6 Connection\u003c\/td\u003e\n\u003ctd\u003eMay connect without further certification into an IS loop with open-circuit voltage not exceeding 10 V, subject to applicable conditions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminals 1 and 2\u003c\/td\u003e\n\u003ctd\u003e7.2 V, 950 Ω, 8 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration Socket Input\u003c\/td\u003e\n\u003ctd\u003eUmax: 11.2 V; Imax: 12 mA; Wmax: 280 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration Socket Output\u003c\/td\u003e\n\u003ctd\u003eUmax: 7.2 V; Imax: 8 mA; Wmax: 15 mW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFM Entity Parameters: Terminals 1, 2, 5, 6\u003c\/td\u003e\n\u003ctd\u003eVt ≤7.2 V; It ≤11.5 mA; Ca ≤11.0 µF; La ≤245 mH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFM Entity Parameters: Terminals 5, 6\u003c\/td\u003e\n\u003ctd\u003eVt ≤1.2 V; It ≤3.8 mA; Ca ≤1000 µF; La ≤3.6 mH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafe-to-Hazardous Area Isolation\u003c\/td\u003e\n\u003ctd\u003e250 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eVerify the complete intrinsically safe circuit before installation. Pay particular attention to terminal-specific entity parameters and cable capacitance.\u003c\/p\u003e\n\u003cp\u003eUse the applicable manufacturer documentation when evaluating certification and hazardous-area wiring. The listed parameters do not replace installation-specific approval checks.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e07 | Terminal Assignment and Connection Reference\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e3-wire RTD Input Negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e4-wire RTD Input Positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003eThermocouple \/ EMF \/ RTD Input Positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003eThermocouple \/ EMF \/ RTD Input Negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9\u003c\/td\u003e\n\u003ctd\u003e4–20 mA Output Positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e11\u003c\/td\u003e\n\u003ctd\u003e4–20 mA Output Negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003ePower Supply Negative\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e14\u003c\/td\u003e\n\u003ctd\u003ePower Supply Positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eWiring Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFollow the sensor-specific wiring diagram for each RTD configuration.\u003c\/li\u003e\n\u003cli\u003eObserve thermocouple polarity when connecting terminals 5 and 6.\u003c\/li\u003e\n\u003cli\u003eUse the correct connection arrangement for 2-, 3-, or 4-wire RTDs.\u003c\/li\u003e\n\u003cli\u003eConnect the analog output to a compatible safe-area receiving circuit.\u003c\/li\u003e\n\u003cli\u003eCheck power supply polarity before energizing the module.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e08 | PC Configuration and Commissioning Workflow\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe MTL4073 uses a computer-based configuration method. Engineers require a personal computer running MTL PCS45 software and a PCL45 interface.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConfiguration Equipment:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePersonal computer.\u003c\/li\u003e\n\u003cli\u003eMTL PCS45 configuration software.\u003c\/li\u003e\n\u003cli\u003eMTL PCL45 interface.\u003c\/li\u003e\n\u003cli\u003eApplicable module configuration and wiring documentation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Configuration Sequence:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eIdentify the installed thermocouple or RTD type.\u003c\/li\u003e\n\u003cli\u003eConnect the approved configuration equipment.\u003c\/li\u003e\n\u003cli\u003eSelect the correct sensor input type.\u003c\/li\u003e\n\u003cli\u003eConfigure temperature linearization and measurement units.\u003c\/li\u003e\n\u003cli\u003eSet the required temperature zero and span.\u003c\/li\u003e\n\u003cli\u003eConfigure cold junction compensation where applicable.\u003c\/li\u003e\n\u003cli\u003eSelect the required direct or reverse output action.\u003c\/li\u003e\n\u003cli\u003eSet sensor burnout and failure response.\u003c\/li\u003e\n\u003cli\u003eReview damping, smoothing, and alarm settings.\u003c\/li\u003e\n\u003cli\u003eVerify the configuration against the process instrument schedule.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eRecord the final configuration for future maintenance. Confirm the actual output response through an approved commissioning test.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e09 | Compatible Equipment and Industrial Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eMTL4073\u003c\/strong\u003e supports temperature measurement systems that use compatible thermocouples or platinum RTDs. Its analog output allows integration with safe-area monitoring and control equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSuitable Field Sensors\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eJ, K, T, E, R, S, B, and N thermocouples.\u003c\/li\u003e\n\u003cli\u003e100 Ω platinum RTDs.\u003c\/li\u003e\n\u003cli\u003e2-wire RTD assemblies.\u003c\/li\u003e\n\u003cli\u003e3-wire RTD assemblies.\u003c\/li\u003e\n\u003cli\u003e4-wire RTD assemblies.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Receiving Equipment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePLC analog input modules.\u003c\/li\u003e\n\u003cli\u003eDCS temperature monitoring channels.\u003c\/li\u003e\n\u003cli\u003eIndustrial process controllers.\u003c\/li\u003e\n\u003cli\u003eTemperature monitoring panels.\u003c\/li\u003e\n\u003cli\u003ePlant data acquisition systems.\u003c\/li\u003e\n\u003cli\u003eSafe-area process instrumentation systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck receiving input compatibility and load resistance before integration. The specified maximum output load resistance is 600 Ω.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Environments\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil and Gas:\u003c\/strong\u003e Monitors pipeline, vessel, compressor, and process equipment temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePetrochemical:\u003c\/strong\u003e Converts thermocouple and RTD signals from hazardous process installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Plants:\u003c\/strong\u003e Supports reactor, storage, and process temperature monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Generation:\u003c\/strong\u003e Supports temperature measurement in auxiliary equipment and industrial process systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePharmaceutical Manufacturing:\u003c\/strong\u003e Transfers temperature measurements from classified production areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Heating:\u003c\/strong\u003e Monitors furnace, heater, and thermal process equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e10 | Global PLC Spare HUB's Insight\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn temperature instrumentation projects, sensor selection and signal configuration directly affect measurement reliability. The MTL4073 addresses both thermocouple and RTD input requirements through one configurable channel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThermocouple Selection:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDifferent thermocouple types produce different millivolt characteristics. Engineers must select the correct sensor type in the configuration software. An incorrect selection creates systematic temperature measurement errors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCold Junction Compensation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThermocouple accuracy depends on correct reference junction compensation. For applications requiring external hazardous-area CJC, the SCJ01 provides an integral compensation sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRTD Wiring Selection:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTwo-wire RTDs introduce lead resistance into the measurement circuit. Three-wire and four-wire arrangements provide alternative methods for managing lead resistance effects. Select the wiring method according to the installed sensor and approved connection diagram.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBurnout Strategy:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSensor burnout configuration deserves attention during safety and control system design. Upscale and downscale actions produce different failure indications at the receiving controller. Engineers should select the appropriate response according to the process alarm philosophy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMeasurement Range:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe output zero and span determine how the selected temperature range maps onto the 4–20 mA signal. Incorrect range configuration can create scaling errors even when the sensor operates correctly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommissioning Recommendation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVerify the sensor type, wiring arrangement, CJC configuration, output scaling, and burnout response together. These checks help distinguish sensor problems from configuration and control system errors.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e11 | Field Diagnostics and Troubleshooting Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe green LED provides power and status indication. Engineers should combine this indication with input measurements, configuration checks, and controller diagnostics.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eObserved Symptom\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePossible Technical Cause\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDiagnostic Approach\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature reading is consistently incorrect\u003c\/td\u003e\n\u003ctd\u003eIncorrect thermocouple type or RTD configuration\u003c\/td\u003e\n\u003ctd\u003eCompare the configured input type with the installed sensor identification.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermocouple reading shifts after wiring changes\u003c\/td\u003e\n\u003ctd\u003eIncorrect polarity or reference junction arrangement\u003c\/td\u003e\n\u003ctd\u003eInspect terminal polarity and CJC installation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRTD measurement differs from a reference instrument\u003c\/td\u003e\n\u003ctd\u003eLead resistance or incorrect wiring selection\u003c\/td\u003e\n\u003ctd\u003eVerify the 2-, 3-, or 4-wire arrangement and measure sensor resistance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput remains at a failure-related value\u003c\/td\u003e\n\u003ctd\u003eSensor burnout or configured failure response\u003c\/td\u003e\n\u003ctd\u003eInspect sensor continuity and review the upscale or downscale setting.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature reading fluctuates\u003c\/td\u003e\n\u003ctd\u003eElectrical interference or unstable sensor connections\u003c\/td\u003e\n\u003ctd\u003eInspect shielding, cable routing, terminals, and grounding arrangements.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController displays an incorrect temperature range\u003c\/td\u003e\n\u003ctd\u003eOutput zero, span, or PLC\/DCS scaling mismatch\u003c\/td\u003e\n\u003ctd\u003eCompare transmitter configuration with receiving channel scaling.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCold junction alarm appears\u003c\/td\u003e\n\u003ctd\u003eCJC sensor or SCJ01 connection problem\u003c\/td\u003e\n\u003ctd\u003eInspect the compensation connector and verify the configured CJC mode.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration does not match the instrument schedule\u003c\/td\u003e\n\u003ctd\u003eIncorrect software settings or previous configuration changes\u003c\/td\u003e\n\u003ctd\u003eRead and document the current settings using the approved configuration equipment.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eEngineering Diagnostic Procedure:\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eCheck the module power and status indication.\u003c\/li\u003e\n\u003cli\u003eConfirm the installed sensor type and identification.\u003c\/li\u003e\n\u003cli\u003eInspect field wiring polarity and terminal assignments.\u003c\/li\u003e\n\u003cli\u003eMeasure thermocouple EMF or RTD resistance using approved equipment.\u003c\/li\u003e\n\u003cli\u003eVerify the selected input type and linearization settings.\u003c\/li\u003e\n\u003cli\u003eInspect the CJC configuration and SCJ01 connection where applicable.\u003c\/li\u003e\n\u003cli\u003eReview sensor burnout and failure alarm settings.\u003c\/li\u003e\n\u003cli\u003eCompare the measured output current with the controller reading.\u003c\/li\u003e\n\u003cli\u003eCheck the configured temperature zero and span.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eIsolate hazardous-area circuits before performing intrusive tests. Follow site procedures and approved intrinsically safe measurement practices.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e12 | Selection and Replacement Considerations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eUse the following engineering criteria when specifying or replacing this module:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Technology:\u003c\/strong\u003e Confirm whether the application uses a thermocouple or platinum RTD.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Type:\u003c\/strong\u003e Match the exact thermocouple type or RTD specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Method:\u003c\/strong\u003e Verify the required 2-, 3-, or 4-wire RTD arrangement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Range:\u003c\/strong\u003e Check the sensor signal against the specified mV or resistance range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Scaling:\u003c\/strong\u003e Confirm the required output zero and span.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCJC Requirement:\u003c\/strong\u003e Determine whether the installation requires an SCJ01 connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault Strategy:\u003c\/strong\u003e Confirm the required upscale or downscale response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl System:\u003c\/strong\u003e Verify the receiving input accepts the configured 4–20 mA output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHazardous-Area Parameters:\u003c\/strong\u003e Check all relevant entity values and installation approvals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration Tools:\u003c\/strong\u003e Confirm access to the required PCS45 software and PCL45 interface.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe MTL4073 is a temperature signal interface, not a universal replacement for every temperature transmitter. Confirm sensor compatibility and configuration requirements before ordering.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e13 | Frequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Why does a Type K thermocouple produce an incorrect reading after replacing the original sensor?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplacement sensors may have different thermocouple types, polarity arrangements, or connection characteristics. Check the sensor marking and wiring before changing configuration settings. Confirm that the module still selects Type K and uses the correct compensation arrangement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: How does RTD lead resistance affect temperature measurement?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eLead resistance adds to the measured sensor resistance, particularly in two-wire installations. Three-wire and four-wire arrangements provide different approaches to reducing this influence. Engineers should verify the actual connection topology rather than assuming all RTD wiring methods deliver identical accuracy.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What should maintenance teams record before changing the configuration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRecord the sensor type, input range, temperature units, output zero, output span, CJC settings, burnout action, and alarm configuration. Keeping these values helps engineers restore the approved operating configuration after maintenance or module replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: Can a technician use an ordinary thermocouple connector instead of the SCJ01?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDo not assume an ordinary connector provides the required cold junction compensation. The SCJ01 includes an integral CJC sensor and supports the specified hazardous-area arrangement. Check the manufacturer's accessory documentation before selecting an alternative.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: What should engineers investigate when the temperature trend is stable but consistently offset?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStart by checking sensor calibration and the selected sensor characteristic. Then inspect cold junction compensation, RTD wiring, and configured measurement range. Compare the field measurement with an independent reference instrument before modifying the output scaling.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e14 | Ordering and Package Information\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eItem\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eMTL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eMTL4073\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eMTL4000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eProgrammable Temperature Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Compatibility\u003c\/td\u003e\n\u003ctd\u003eEight Thermocouple Types and Platinum RTDs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003e4–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration Equipment\u003c\/td\u003e\n\u003ctd\u003ePCS45 Software and PCL45 Interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Accessory\u003c\/td\u003e\n\u003ctd\u003eSCJ01 Hazardous-Area Connector with Integral CJC Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrder Quantity\u003c\/td\u003e\n\u003ctd\u003eAccording to purchase requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eConfirm the SCJ01 accessory requirement separately when ordering. Software, configuration interfaces, and accessories should not be assumed as standard package contents.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/MTL4073.png?v=1793849799\" alt=\"\"\u003e\u003c\/p\u003e","brand":"MTL","offers":[{"title":"Default Title","offer_id":45014018982070,"sku":"MTL4073","price":178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/MTL4073_04ff61d9-ceb0-4c5a-9a7a-3b2dd522045b.jpg?v=1793849824","url":"https:\/\/www.plcsparehub.com\/products\/mtl4073-mtl4000-series-programmable-temperature-transmitter","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}