Temperature transmitter measurement channel resistance value automatic transmitting device and method

Abstract

The invention belongs to the technical field of temperature measurement, and particularly relates to a temperature transmitter measurement channel resistance value automatic transmitting device and atemperature transmitter measurement channel resistance value automatic transmitting method. The temperature transmitter measurement channel resistance value automatic transmitting device comprises a cable joint, connecting cables, a resistance box, a display screen, a temperature range setting key, an interval time setting key, a unit setting key and an information query key, wherein the cable joint is connected with the resistance box by means of the connecting cables; the temperature range setting key, the interval time setting key, the unit setting key and the information query key are arranged on a panel of the resistance box side by side; and the display screen is further arranged on the panel of the resistance box. According to the temperature transmitter measurement channel resistance value automatic transmitting device and the temperature transmitter measurement channel resistance value automatic transmitting method, the precision verification of the measurement channel of thetemperature transmitter can be completed safely, rapidly, effectively and correctly.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement, and in particular relates to a device and method for automatically sending the resistance value of a measurement channel of a temperature transmitter. Background technique [0002] In industrial applications, temperature transmitters respond faster than conventional thermal resistance thermometers, and can quickly measure the temperature value of process systems or equipment, and are widely used. The temperature transmitter is generally divided into two parts, the local temperature probe and the secondary instrument, which can quickly measure the temperature value of the process system or equipment. For some systems used to protect the safety of the production process, it is necessary to regularly verify the accuracy of the measurement channel of the temperature transmitter to ensure that the accuracy of the temperature measurement loop channel meets the requirements. General ins...

AI Technical Summary

Problems solved by technology

In the actual work process, it is necessary to manually calculate the resistance values ​​of the temperature transmitter and manually adjust the resistance value of the resistance box. The risk of manual errors is high. For some places with high temperature, high pressure, and high radioactivity, it is not suitable for instrumentation and control personnel to work in the field for a long time , which brings inconvenience to the work of on-site instrumentation and control personnel

[0003] Taking a nuclear power plant as an example, a temperature transmitter is used to measure the temperature of the main pipeline of the primary circuit. In order to ensure that the accuracy of the measurement circuit of the temperature transmitter meets the requirements, the instrumentation and control personnel perform accuracy verification during the overhaul of the unit. Unplug the instrument connector on the secondary side, use the resistance box to manually adjust the resistance value according to the range of the temperature transmitter, and complete the accuracy verification of the temperature transmitter measurement circuit. Incorrect value adjustment occurs, and some secondary meters of temperature transmitters are installed around highly radioactive media, and on-site instrumentation and control personnel should not work in this place for a long time

Images