【JST-012】One-on-one Q&A on E+H instrument issues【Technical update to Floor 921】
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This post was last edited by Qiu Gege Bawang on 2018-10-21 at 23:00. It is a thread dedicated to technical discussants – feel free to ask questions! m8 D# }- g' d# b/ H My strengths: automation control instruments and equipment. Work experience: 5 years as an E+H service engineer with on-site experience. C' ]7 e1 P% |" X' W ( z( z/ j+ G1 D ( U7 n. o; o& t a. `2 m2 k I will do my best to answer any questions raised! ) }4 n* f+ R( x* b$ ~7 L8 N Note: 6 L6 B$ I D: w' Q 1) This post is mainly about issues related to E+H instruments, aimed at facilitating communication and mutual improvement. 2) This post is intended for one-on-one discussions between those seeking help and me; other forum users are also welcome to participate in the discussions. If you are not satisfied with the responses, please create a new thread in the Instrumentation Discussion Area. Thank you for your cooperation! ) Any personally aggressive replies are prohibited; a mute order may be requested if necessary.
The E+H ultrasonic level gauge exhibits large measurement fluctuations, and it seems to have weaker interference resistance (compared to Siemens)
In fact, as long as the installation is done properly and maintenance is carried out correctly, the interference from factories generally has little impact on the instruments; moreover, in many cases it is the price that determines whether an instrument will be used or not
From what we’ve seen in terms of purchasing options, Siemens is indeed more expensive. The E+H brand also seems good; but how can we ensure low measurement fluctuations, given that the liquid level we measure isn’t very stable?
Regarding this issue, first determine whether it is necessary to use ultrasonic waves; if there is a choice, guided wave radar is recommended as it works well for fluctuating liquid surfaces. Furthermore, even ultrasonic waves, when their parameters are optimized, can be very effective in combating fluctuating liquid surfaces.
Currently, the temperature transmitter TMT84 allows for normal communication and temperature display in the control room; however, when using the TM184, only communication is possible without any temperature display. The GSD file currently in use is version PA3.02. Could it be caused by a mismatch in the GSD files?
I missed a letter – it should be TMT184. Sorry about that.
Yes. To update different GSD files~
Siemens possesses a dynamic TVT curve technology that its competitors do not have, and this is why Siemens remains relatively stable
What is the reason for the high echo at the top of the tow rope with guided-wave radar? Sometimes, the liquid level suddenly drops to around 40 and then returns to zero, with the echo from the top clearly exceeding that of the liquid surface. Suppression has been applied now. Also, why doesn’t the Hart manual suppression distance of 2.6 (for false echoes) work, and what should be done?