Valcom T7M Multipoint Temperature Transmitter

The VALCOM T7M Multipoint Temperature Transmitter is an advanced electronic device that offers precise and reliable temperature measurement capabilities for industrial applications, being especially useful in the marine sector. Equipped with a SMART-HART® electronic and a built-in multiplexer, the T7M can accommodate up to 15 resistance thermometers PT100 (3-wires) or 14 resistance thermometers plus 1 interface or level sensor. This multipoint solution presents significant advantages in terms of ease of installation and reduction in connection cables required, resulting in cost and time savings during setup.

The T7M transmitter provides two output options to suit different application requirements. The first option is an analog 4-20mA signal, which allows for averaging temperature measurements. This output can be used when obtaining an average temperature value is desired. The second option is the HART® protocol, which enables the transmission of both single point values and average temperature readings. The HART® protocol offers enhanced flexibility and access to additional diagnostic information. In the T7M series with a display version, users have the convenience of local display, which enables them to view average and intermediate single temperature points directly on the device.

The accuracy of the VALCOM T7M transmitter depends on the class of the sensors used. The available classes include DIN A, DIN B, 1/3 DIN, 1/5 DIN, and 1/10 DIN. These classes define the accuracy and precision of the resistance thermometers PT100, ensuring reliable and consistent temperature measurements. By selecting the appropriate class, users can tailor the T7M transmitter’s accuracy to meet the specific needs of their application.

To power the T7M transmitter, a supply voltage of 12.5 to 30 Vdc is required. This wide voltage range ensures compatibility with various power sources commonly found in industrial environments. The output signal of the transmitter can be either an analog 4-20mA signal or the HART® protocol with Rev6 compatibility. The alarm values for the transmitter are set at 3.85mA and 21mA, allowing users to define specific thresholds and trigger alarms when temperature measurements exceed or fall below the predefined limits. These alarm values are crucial for promptly identifying and addressing temperature variations that could impact process integrity or equipment performance.

Long-term stability is a crucial aspect of any temperature measurement device, as it ensures consistent performance over extended periods. The T7M transmitter exhibits long-term stability of less than 0.1% FS per year, guaranteeing that the accuracy and reliability of temperature measurements remain unaffected over time. This stability is a testament to the robust design and high-quality components used in the construction of the transmitter.

In terms of temperature ranges, the T7M transmitter is designed to operate in challenging industrial environments. It can handle process temperatures ranging from -40 to +85°C, making it suitable for a wide range of applications. The LCD working temperature range is -10 to +65°C, allowing the display to function reliably in various operating conditions. The storage temperature range is specified as -40 to +90°C, ensuring that the device remains protected even during periods of non-operation.

The T7M transmitter is built to withstand demanding environmental conditions. The housing options include AISI 316 stainless steel with an IP67 ingress protection degree and aluminum with an IP66 rating. These ratings indicate that the transmitter is dust-tight and protected against powerful water jets or temporary submersion. This level of protection ensures the longevity and durability of the device, even in harsh industrial environments.

The VALCOM T7M Multipoint Temperature Transmitter has undergone thorough testing and complies with various industry standards. It has been subjected to vibration tests according to IEC 60068-2-6, ensuring its robustness and reliability in environments with mechanical vibrations. Additionally, the transmitter can operate in environments with a relative humidity of less than 98% RH without condensation, making it suitable for a wide range of industrial settings.

Overall, the VALCOM T7M Multipoint Temperature Transmitter combines advanced electronic capabilities, versatile input options, high accuracy, and durable construction to deliver precise and reliable temperature measurements for numerous applications including in the marine environment. With its multipoint functionality, user-friendly interface, and robust design, the T7M transmitter offers an excellent solution for temperature monitoring and control in diverse industrial processes.