I. selection of temperature detector
At present, the industrial common temperature controller mainly bimetal thermometer, thermocouple, thermal resistance, and radiation thermometer.There are many kinds of temperature control instruments. When selecting temperature instruments for testing, we should pay attention to the characteristics and scope of application of each instrument, which is also the first key link to ensure the measurement accuracy of temperature control instrument.
In addition, in the selection of temperature controller, in addition to the comprehensive consideration of the measurement accuracy, signal system, stability and other technical requirements, but also pay attention to the impact of the working environment and other factors, such as environmental temperature, medium characteristics (oxidation, reduction, erosion), etc., choose the appropriate protective sleeve, connecting wire accessories. Thermocouple, thermal resistance and radiant thermometer can be used for online measurement of temperature signal. Among them, thermal resistance and thermocouple are the most commonly used type c thermometer in the industry. The former is used for measuring medium and low temperature under 500, while the latter is more suitable for measuring medium and high temperature in the range of 500~1800. Bimetal thermometers are generally used for in situ detection and indication of temperature signals.
Ii. Installation of temperature controller
The correct installation of temperature controller is another key link to ensure the normal use of the instrument. Generally speaking, the installation of temperature controller shall follow the following principles:
The installation of testing components should be safe and reliable.In order to avoid the damage of detection components, the protective sleeve of the contact type measuring instrument should have enough mechanical strength, and the material and wall thickness of the protective sleeve can be reasonably selected according to the working pressure, temperature, erosion and other characteristics of the site.When the medium pressure exceeds 10MPa, protective jackets must be installed to ensure safety;In order to reduce the measurement lag, good heat transfer fillers, such as silicone oil and quartz sand, can be installed inside the protection tube.The holes in the junction box should be face down to avoid the measurement accuracy being lowered due to the poor sealing and the entrance of moisture and dust.
CKR CH short shell series intelligent (temperature) display regulator adopts 8-bit single-chip high reliability, a variety of sensors freely input, and it adopts a wide range of switching power supply. The product’s performance indicators, input style, control function and the installation size are fully compatible with the i mported intelligent digital temperature controller. CH short shell series intelligent meters, having the latest fuzzy control and combining with advanced PID adjustment algorithm, precisely control the controlled objects.