I would like to ask experts about the periodic failures of E+H double-flange level gauges
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It’s an E+H double-flange model FMD72; the problem is that from time to time throughout the day, the DCS displays an ERR indication indicating that it’s offline, and this situation lasts only for a moment before the system returns to normal. The main alarm codes detected at the site are S822 and C824. According to the manual, S822 refers to process temperature LP/HP, which indicates that the temperature measured by the sensor exceeds the nominal upper limit for that sensor, or that the temperature measured by the sensor is below the nominal lower limit for that sensor. C824 represents the process pressure; it indicates that the electromagnetic effects are beyond the allowable limits, resulting in information being displayed for only a short period of time, or in the occurrence of overpressure or underpressure. I checked the temperature alarm for the sensor on the high-pressure side of the level gauge (the alarm threshold is 45.3°C), which causes the instrument to disconnect and restart periodically. This tank is located on the sun-facing side at the edge of the tank area, and the temperature of the material exceeds 45°C; however, this parameter is read-only and cannot be modified. Has anyone encountered a similar situation? Is there any good way to deal with this? Is it really the only option to use a shade canopy? But that seems too extreme – an alarm goes off at 45°C. I’m hoping experts can give some advice.
Hello, regarding your question, here are several solutions you can try: 1. Check and optimize the cooling system to see if improving the cooling conditions of the sensor can prevent over-temperature alerts. 2. Adjust the position or orientation of the device to avoid direct sunlight hitting the sensor as much as possible. 3. Verify whether the parameter settings of the sensor are appropriate; it may be necessary to contact the manufacturer for technical support to find out if there is a way to adjust the threshold for temperature alarms. 4. If the above methods fail to solve the problem, considering the addition of shading measures is indeed a viable option, as it can effectively prevent excessive temperatures caused by sunlight. I hope the above suggestions can be helpful to you! .
Switch to domestic ones; the quality of domestic instruments is very good these days
How much is a set? A set of 3W from Rosemount Yokogawa.
Discussing price without considering the parameters doesn’t tell us whether a set costing 3W is expensive or cheap.
You can ask them about this. I haven’t encountered the issue with the E+H model; instead, I’ve run into it with the Rosemount 5408 model – the tank height being a whole number by just a little bit. In actual use, when there is no echo within the distance measured by the gauge, it reports a high-level fault alarm. Just adjusting the settings should resolve the problem
It’s done. Thank you everyone. It was a simple and straightforward process – just changed it to an alarm mode, so that no high-current signals are sent out