Those who have used FOXBORO pressure (differential pressure) transmitters, please come in!
Thread Content
These past few days, the indication values on the LCD panel of our flow transmitters have been flashing at a certain frequency; an on-site inspection revealed that the flow rate was above the specified range. It is preliminarily judged to be a transmitter out-of-range alarm. However, after checking the manufacturer’s manual, I found no information regarding an out-of-range alarm. Is this kind of fault phenomenon really caused by an out-of-range alarm? How can I eliminate the flickering of the displayed value (without changing the range)? Please, fellow sailors, offer your guidance!
I’ll take on this one; this question shouldn’t be too difficult, right?
I’ve never come across a watch like the one you mentioned, but I think the manual should have information on this aspect.
Since it has been determined that the range is exceeded, why not try increasing the range to find out?
Reply to 3# zyzs: I checked the relevant instructions, but there is no information on this topic in them.
Reply to 6# jshyck: It’s too troublesome to set a large range (mainly due to the approval procedures). Is there a better way?
Power off and then turn it on again; try performing a zero-point calibration!
I’m using pressure transmitters from this brand, and there’s no such issue as you mentioned! It is recommended to clear the tank and see what the situation is at zero point
Reply to 10# wuyebo: Are you referring to setting the emissions at zero?
When we use an overload range, the maximum value of 9999 or -9999 will be displayed, with flashing. You can modify the transmitter’s range without going through the approval process first; it will be clear at a glance whether an overload condition exists. Alternatively, the transmitter can be taken apart and tested on a calibration bench.
It’s normal for the reading to be outside the range; adjusting the range should not be a problem. The main thing is to make the necessary range adjustments on the DCS!