YOKOGAWA 16137-223 high-precision temperature transmitter

YOKOGAWA 16137-223 high-precision temperature transmitter

Product Overview

YOKOGAWA 16137-223 high-precision temperature transmitter is an industrial grade temperature detection and signal conversion device launched by Yokogawa Electric in Japan. It belongs to the core sensing layer product of process automation control systems and is mainly used for precise acquisition, signal amplification, and standard signal conversion of temperature physical quantities in industrial production sites. The transmitter adopts a modular design and can seamlessly interface with mainstream temperature sensors such as thermocouples and thermal resistors. Through an internal high-precision signal processing circuit, the weak temperature signals collected by the sensors are converted into 4-20mA DC standard analog or digital signals, achieving stable communication with the Henghe Centum series DCS system and third-party industrial automation equipment. The product has excellent resistance to electromagnetic interference and wide temperature adaptability. It uses industrial grade high reliability components and can operate stably for a long time in complex industrial environments with high temperature, high humidity, high dust, and strong electromagnetic interference. It provides accurate and reliable temperature data support for process control in industries such as petrochemicals, power, metallurgy, and pharmaceuticals.

Specification parameters

1. Core temperature measurement parameters

-Adapt to sensor types: Supports multiple thermocouples (K/J/S/R/B/E/T, etc.) and thermal resistors (Pt100/Pt1000/Ni100, etc.) to meet the needs of different temperature measurement scenarios.

-Measurement range: dynamically matched according to the type of sensor, thermocouple adaptation range -200 ℃~1800 ℃, thermal resistance adaptation range -200 ℃~850 ℃, meeting the temperature measurement needs of the vast majority of industrial processes.

-Measurement accuracy: ± 0.1 ℃ (standard environment 0 ℃~100 ℃, connected to Pt100 sensor), temperature resolution up to 0.01 ℃; Linear error ≤ ± 0.05% FS ensures the accuracy and reliability of temperature measurement.

2. Signal output parameters

-Output signal type: Standard 4-20mA DC analog signal output as standard; The optional HART digital communication protocol enables simultaneous transmission of analog and digital signals, supporting remote parameter configuration and fault diagnosis.

-Output load capacity: Maximum load resistance ≤ 500 Ω (4-20mA output mode), suitable for industrial field standard signal transmission links.

-Response time: ≤ 50ms (typical value), able to quickly capture temperature fluctuations and meet the requirements of dynamic temperature monitoring scenarios.

3. Electrical parameters

-Power requirements: The working voltage is DC 12~36V, the allowable voltage fluctuation range is ± 10%, the maximum power consumption is ≤ 3W, and it is suitable for industrial site standard DC power supply systems.

-Isolation performance: The input (sensor side), output (signal side), and power side adopt a three terminal optoelectronic isolation design, with an isolation voltage of ≥ 2500V AC and an isolation level in accordance with IEC 61010-1 standard, effectively blocking electromagnetic interference and ground loop interference.

-Overvoltage/Reverse Connection Protection: The power supply end has reverse connection protection function, and the signal output end has ± 30V DC overvoltage protection function, which can effectively resist the damage of equipment caused by abnormal voltage fluctuations on site.

4. Physical and environmental parameters

-Installation method: Supports rail mounted installation (compatible with 35mm standard DIN rail) and on-site wall mounted installation, easy to install, suitable for different on-site installation conditions; The module size (width x height x depth) is approximately 45mm x 100mm x 125mm (subject to actual product).

-Working environment: Operating environment temperature -10 ℃~50 ℃, relative humidity 45%~85% (no condensation); The storage environment temperature is -30 ℃~70 ℃, and the relative humidity is 10%~90% (without condensation), which can adapt to most industrial site environmental conditions.

-Protection level: The body protection level is IP65, with good dust and splash resistance, and can be directly installed in harsh environments on site; The anti vibration capability meets the IEC 60068-2-6 standard, and the anti impact capability meets the IEC 60068-2-27 standard.

-Anti interference capability: Compliant with IEC 61000-4-2 (electrostatic discharge ± 8kV contact/± 15kV air), IEC 61000-4-3 (radiated electromagnetic field 10V/m), IEC 61000-4-4 (electric fast transient pulse group ± 2kV power supply/± 1kV signal) anti-interference standards, suitable for complex industrial electromagnetic environments.

Performance characteristics

1. Ultra high precision and stable signal conversion

Using high-precision signal conditioning circuits and A/D conversion chips independently developed by Yokogawa, the measurement accuracy of ± 0.1 ℃ and linear error of ≤± 0.05% FS are achieved, with a temperature resolution of 0.01 ℃, which can accurately capture small temperature fluctuations. Internally integrated signal filtering and amplification modules effectively suppress the impact of on-site electromagnetic interference on weak temperature signals, ensuring the stability and reliability of output signals; The three terminal isolation design further blocks interference transmission, ensuring measurement accuracy in complex electromagnetic environments.

2. Flexible sensor adaptation and signal output

Supporting the integration of multiple types of thermocouples and thermal resistance sensors, it can adapt to different temperature ranges and measurement accuracy requirements without the need for additional conversion modules, greatly improving product versatility. Standard 4-20mA DC analog signal output is available as standard, which can be directly connected to most industrial automation control systems; Optional HART digital communication function can be used to achieve remote parameter calibration, range adjustment, and fault diagnosis, reducing on-site debugging and maintenance costs.

3. Excellent environmental adaptability and reliability

The product has a wide temperature working range (-10 ℃~50 ℃) and can adapt to industrial site environments with high and low temperature fluctuations; The protection level reaches IP65, with good dust and splash resistance, and can be directly installed on site instead of relying on control cabinets. Select industrial grade high weather resistant components, undergo strict environmental stress screening and aging testing, with an average time between failures (MTBF) of ≥ 100000 hours, significantly reducing equipment failure rates; The improved overvoltage and reverse connection protection functions further enhance the safety of equipment operation.

4. Convenient installation and maintenance features

Supports two installation methods: rail mounted and wall mounted, with a simple installation process and adaptability to different on-site installation space requirements; The wiring terminals are designed to prevent accidental insertion and come with clear wiring markings to reduce the risk of wiring errors. The optional HART communication function supports remote debugging and fault diagnosis, and maintenance personnel can complete parameter adjustment and fault troubleshooting without arriving on site; It only takes 30 minutes for the body to reach thermal stability, and precise measurement work can be carried out after 30 minutes of power on.

Working principle

The core working logic of YOKOGAWA 16137-223 high-precision temperature transmitter is "temperature sensing signal conditioning signal conversion standard output", which achieves precise acquisition and reliable transmission of temperature signals through four core links. The specific workflow is as follows:

1. Temperature signal perception

The thermocouple or thermistor sensor connected to the transmitter goes deep into the temperature measurement point of the industrial site, converts the physical temperature quantity into corresponding electrical signals - the thermocouple outputs a thermoelectric potential signal corresponding to the temperature difference, and the thermistor outputs a resistance signal that changes with temperature, and then transmits the electrical signal to the input channel of the transmitter.

2. Signal conditioning and isolation

After the electrical signal transmitted by the sensor enters the transmitter, it is first processed by the signal conditioning circuit: weak signals are amplified through a precision resistor network and amplification circuit, and high-frequency electromagnetic interference clutter is removed through a low-pass filtering circuit to ensure signal stability. Subsequently, the conditioned signal enters the three terminal isolation circuit, which achieves electrical isolation between the input, output, and power supply side through optocouplers, blocking ground loop interference and external electromagnetic interference to ensure the accuracy of signal processing.

3. Signal conversion and calibration

After isolation and conditioning, the electrical signal is transmitted to the core signal processing unit (MCU) inside the transmitter, which converts the analog electrical signal into a digital signal through a high-precision A/D converter. The signal processing unit performs linear calibration and temperature compensation on the digital signal based on the preset sensor type and range parameters, eliminating the influence of sensor nonlinear errors and environmental temperature on the measurement results, and obtaining accurate temperature digital signals.

4. Standard signal output and communication

The signal processing unit converts the calibrated temperature digital signal into a 4-20mA DC standard analog signal, which is transmitted to the upper control system (DCS/PLC) through the output channel; If equipped with HART communication function, temperature digital signals and device operating status information can be simultaneously transmitted by superimposing them on 4-20mA analog signals through the HART protocol, achieving synchronous transmission of analog and digital signals. After receiving the signal, the upper computer restores the 4-20mA signal to the corresponding temperature value, and can also send parameter configuration instructions to the transmitter through the HART protocol to achieve remote debugging and fault monitoring.