14
Measurement close to an elbow
Take readings on straight pipe runs
The rules to be applied to obtain the ideal measurement conditions, depending on the arrangement of the pipes, are known.
The following paragraphs provide information on the general rules to be followed.
The following indications show, for liquids, the minimum distances (L) to be complied with before and after a disturbance
depending on the pipe’s inside diameter (D), so that the errors induced by these disturbances remain less than ±1 %.
V «Reflex» mode : Distance > (3x) the diameter of the pipe
/ «Direct» mode: Distance > (5x) the diameter of the pipe
V «Reflex» mode : Distance > (15x) the diameter of the pipe
/ «Direct» mode: Distance > (20x) the diameter of the pipe
V «Reflex» mode : Distance > (15x) the diameter of the pipe
/ «Direct» mode: Distance > (20x) the diameter of the pipe
V «Reflex» mode : Distance > (3x) the diameter of the pipe
/ «Direct» mode: Distance > (5x) the diameter of the pipe
V «Reflex» mode : Distance > (15x) the diameter of the pipe
/ «Direct» mode: Distance > (20x) the diameter of the pipe