How to install an intelligent integrated temperature transmitter
Thread Content
I would like to ask for your advice. I currently have a batch of intelligent integrated temperature transmitters with a measurement range of 0-400 degrees; after being in use for over 30 hours, these transmitters have started to fail. I would like to ask everyone if there are any good installation methods. It’s better to use a split-type one; if it’s a unitary type, how should I protect it from temperature changes?
Integrated, separate – most of the time, it’s not the main factor! The key is to choose products of high quality that are also inexpensive; those made in China can be just as good, as they have a simple design and low production costs. So, for your own sake and to ensure the proper operation of the device, it’s better to choose products from established manufacturers. Also, pay attention to choosing a high-quality product during installation to prevent water from getting in! Feel free to contact me if needed
In many high-temperature applications, temperature probes are consumable components that fail after a short period of time. A supervisor in a smelting plant once said that high-temperature thermocouples of good quality would last at most 15 days in their plant, while those of lower quality would stop working after just 3 days. Therefore, it is advisable to use either split-type probes or probes with quick-connect interfaces that allow for easy replacement. From the perspective of reducing interference, split-type probes with wires pose a risk, so the latter option is preferred. On www.sc-sensor.com, there is a model called SC222 that can serve as a reference.
The poster had better first determine whether it is a problem with the temperature sensing element or with the electrical conversion part. If it is a problem with the temperature sensing element, it may be due to an inappropriate model specification or installation method; this issue can only be resolved by choosing the right product, otherwise it will remain a potential hazard. If it’s the electrical part of the transmitter, then it means that your procurement process led to the selection of products that are cheap but of poor quality, and that makes things difficult – as human factors are involved, and it’s very hard for the people in the workshop to deal with such situations.
It’s the electrical conversion component that’s broken. The probe at the site is fine.
The storage tanks in our tank farm use integrated temperature control systems manufactured by Chuanyi; the temperature modules appear to be from Siemens, and their quality is quite good! No such high failure rate as the original poster! It’s basically always a fault with the temperature module!
It’s probably an issue with the mass changing with temperature. Was the damage to that conversion part caused by high temperatures? Logically, a thermistor should not be damaged by temperature within its specified operating temperature range.
From the perspective of reducing intermediate steps and lowering the failure rate, it is best to use specialized temperature transmitters or to output a resistance signal directly to the card slot in the control cabinet.
Personally, I think it would be useful to use a secondary meter, or to transmit the resistance signal directly to the cabinet in the control room
The pipeline needs to be insulated; the temperature sensor should be installed on the side or at the opposite end, in order to minimize heat transfer to the transmitter.
It doesn’t matter whether it’s a separate unit or an integrated one; what’s important is that the quality of your transmitter must be good. The Rosemount transmitters I’ve used have basically never had any problems.