As a further question, how is the reading affected if a flow meter that is supposed to be vertically mounted (ie mounted on a vertical piece of piping) is horizontally mounted?
To supplement Joerd's solution, I would try this
1) Hit "Ctrl-`" key simultaneously with cursor in the worksheet. (NB: the ` key is just next to 1 in the numeral row above the alpha keys)
- this will show up all the formulas in the worksheet
2) Hit Alt, E and E to activate the...