Interface Level

This may depend on whether your level transmitter allows for graded calibration for differing liquid densities at different depths. You may need to construct some sort of height vs. weight lookup table for this application. I would try to open up a conversation with the level transmitter mfr.

What's direct m Am O/P?

GA for Tony, who happens to hail from the city of my origin.

A fellow Bellinghamster?! It's a small world . . .

Dear,

Thank you very much indeed, especially for the link.

If you are doing the calibration in the shop and don't have access to a fluid with the same S.G. as the lighter fluid you can just use water.

lighter fluid S.G./heaver fluid S.G.*range of cage

.8/1*38=30.4''

So fill the cage to 30.4'' and set your zero

Heavy fluid S.G./light fluid S.G.*range of cage

1/1*38''=38

so fill the cage to 38'' and set your span

Not sure what brand and modle you have but if you have a DLC3000 you can just calibrate with water configured for level then reconfigure for interface and enter the correct upper and lower S.G.'s and it will be accurate.

Sorry made a mistake when writing the formula it should be S.G lighter /S.G. of water

and S.G. of heavier fluid/S.G. of water in this case you still get the same results

Be careful -- your solution assumes the instrument's measuring span is 38 inches. We don't necessarily know that. All we know is that the nozzles are 38 inches apart!

yes that is correct if the range is something different you would inpur the correct range into formula instead of the 38 I used to get the correct numbers.