Seeking advice on cleaning ultrasonic flow meter probes
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The unit has an Elster internal contact 4-channel ultrasonic flow meter, which has already been calibrated. After the calibration, it was possible to make an appointment with the manufacturer, and thus the probe was cleaned. Two opinions emerged: 1. The probe cannot be cleaned, as cleaning it may increase the gain and affect accuracy. 2. It can be cleaned; it is a routine procedure. There are other units in the vicinity that have their equipment cleaned twice a year, but it seems that our unit doesn’t have such a rule at the moment. I also consulted the certification body, and their opinion was that cleaning the certification certificate renders it invalid. Actually, I don’t quite understand it; I also checked JJG1030-2007, but found no information regarding the impact of probe cleaning on calibration. I would also appreciate it if an expert could explain how to clean the probe. Also, are there any standards or guidelines to support this?
By the way, the new calibration certificate states that the calibration did not modify the flowmeter’s parameter settings.
Metrology science does not deal with things like washing buttocks, faces, or cleaning probes. Metrology institutions do not understand what consequences can arise from failing to clean probes; that’s why they say that the calibration certificate becomes invalid. “How exactly should the probe be cleaned... are there any standards or guidelines to guide this process? There’s some dust from hammers; was the industrial operation standard you saw drafted with the involvement of measurement institutions? ,,, Have you ever had one? Those who work in metrology have cats in the laboratory and study value transfer in accordance with relevant standards; those who write operating procedures do not work in metrology. How does instrument accuracy come about? What is the relationship between an instrument’s accuracy in the field and its accuracy in the laboratory? What is the causal relationship between cleaning the probe and changes in accuracy? Does he understand these issues? Is he capable of understanding it? He knows a bit about knitting too. So, you ask questions, but they can’t be too detailed – experts haven’t studied such details. And experts can’t just take off their pants for you to look at their genitals or something like that; that’s why they end up saying all kinds of nonsense. {:2_36:}
Since I’m a beginner, it’s very confusing. There are two testing institutions nearby; the one where we sent the sample stated that it was invalid and that it needed to be taken apart and sent for testing again. Another case involved a colleague who knew someone from another company; the calibration facility to which the ultrasonic flow meter was sent said that cleaning the probe had no impact. The manufacturer also said it has no impact. But the internal departments seem to think it has a particularly big impact; compared to what other departments told me, it’s like using a high-pore pore cleaning plate – it’s a routine procedure. There’s no supporting evidence available to back this up either; ε=(′ο｀*))) Sigh.
There’s a problem with the hammer; the ultrasonic level gauge here sometimes gives inaccurate readings. Just remove it, clean it, and reinstall it – go ahead and do it without worry!
They keep pressing me to send the ultrasound for testing again; given our company’s approach, I’ll definitely have to send it later. I’m just worried that I might still be held accountable in the future, but I think I haven’t done anything wrong and there are proofs to support my defense.
Your company must be very wealthy – even a simple probe needs to be recalibrated; they can afford to be arbitrary with their money. Is this flow meter used for trade settlement, that it needs to be sent for inspection so frequently?
Previously, it was required to be sent for inspection after 2 years, and it was indeed used for trade handover.
There is no impact; the probe won’t get damaged, nor will the compressed crystals be ruined. How can there be any effect on accuracy? Is recalibration necessary? Ultrasound measures the time difference, not the pressure on the diaphragm
Their claim is that the probe was dirty during the inspection, but it passed the test. I cleaned the probe when it was put into use, but at that point it wasn’t necessarily qualified for calibration. But I wonder, then doesn’t cleaning the probe in this way require it to be cleaned to the same level of dirtiness as when it was calibrated?
I suggest not cleaning it – just replace the probe. Anyway, we have money\ud83e\udd23