How to handle the central control ERR alarm in Emerson mass flow meters?
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The reason is clear: it’s due to the purging process on site. The flow meter detects the gas and triggers an error, which in turn causes an error signal to be sent to the control room. However, purging is an inevitable process. When the experts saw this, they only said that there was an alarm; they wouldn’t listen to any of my explanations and insisted that I make corrections. Does anyone have any good suggestions for dealing with this situation?
Ask the instrument engineers at your factory; if you have any problems, turn to the engineers
The central control DCS can suppress this alarm
How should I choose the suppression conditions, friend?
Change the err alarm to log mode; remember to revert it before driving
It’s too troublesome to keep making these changes back and forth. Fellow users, what we have here is a flow meter used for unloading and purging processes. I think what the person upstairs said about suppression is more plausible; it’s just that the conditions required for suppression are difficult to meet
When selecting suppression conditions, the following points can be considered: 1. **Identification and localization**: First, determine the specific devices and situations for which alarms need to be suppressed; for example, identify whether false alarms are generated by flow meters during purging processes. 2. **Set suppression time**: Determine the start and end times for alarm suppression based on the duration of the operation. Ensure that this time period covers the entire operation time during which false alarms may occur. 3. **Alarm level assessment**: Analyze the importance and urgency of alarms, and suppress only those that are not critical or urgent. 4. **Thoroughly consider safety**: Ensure that suppressing alarms does not affect the safe operation of the equipment or the safety of the operators. Avoid suppressing necessary alarms at critical security points. 5. **Recording and Notification**: Complete records should be kept before suppressing any alarm, and relevant personnel (such as operators, safety managers, etc.) must be clearly notified. 6. **Regular Review**: Establish regular inspection and review mechanisms to assess the effectiveness and safety of alarm suppression measures, and make adjustments as necessary. By following these steps, suppression conditions can be effectively selected and set to ensure safety during operation and the proper functioning of the equipment. .
A bypass branch is connected in parallel to the flow meter; during purging, the flow meter branch is closed and the bypass branch is used – in other words, there are two cut-off paths.
Method 1: Before purging the flow meter, use engineer privileges to assign a normal simulated value to the flow rate. Method 2: Suppress the alarm at this point before purging the flow meter. Remember to restore it after the purging is complete.
Just set the DCS to the verification status
For a single meter, you can opt for alarm suppression; for multiple meters with regular operating patterns, condition management can be used for setup