Issues with on-site migration?
Thread Content
There is a hot water tank on site (a horizontal tank), and a Yaskawa dual-flange differential pressure transducer is used for measurement. According to the installation instructions, the flange with “+” should be installed at the top and the one with “–” at the bottom. The tank is 2 meters high, and the medium inside it is circulating hot water. When using the positive migration method at 375, the readings remain inaccurate after the measurement range is reached. What could be the reason?
If measuring the liquid level in a hot water tank, use “-” for the flange on the top and “+” for the flange at the bottom; negative migration should be employed. It is also necessary to check whether high temperatures have an impact on the double flanges.
Reply to 1# langpei*n03: “‘+’ means installing a flange, while ‘—’ means removing a flange. Why is it done this way?” It’s not conventional thinking.
It seems to be installed backwards; how is measurement carried out? Please give your advice~~~~
Isn’t the 【+】 symbol meant to be used on the high-voltage side?
I agree with the opinion from the first floor; however, we didn’t perform any migration – just performed range calibration, and it’s ready to use.
That’s right – it’s high pressure; the flange at the bottom of the tank is for high-pressure use
It feels like it’s installed backwards.....
It’s installed backwards: the plus sign should be at the bottom, and the negative sign at the top; this causes negative migration~~~