A Q U A M A S T E R 4 | E L E C T R O M A G N E T I C F LO W M E T E R I N S E R T I O N S E N S O R | O I/ F E W 4 0 0/A P - E N R E V. B19Centre line method for pipe diameters >1 m ≤2m (>40 in ≤80 in)WARNING – PRESSURIZED EQUIPMENT• When inserting or removing the insertion sensor,the safety mechanism (see page 16) must befitted and engaged to prevent the insertionsensor being forced out under pressure. Ensurethe valve is fully open.• Safety restraint omitted for clarity.Referring to Figure 23:1 Measure internal diameter (D) of the pipe – see page 14.2 Measure from the top of the pipe to the top of the valve plate(VP) (item A).3 Slacken nut B.4 Lower insertion sensor C until it touches valve plate D.5 Slide positioning collar E down to nut B and lock in placeusing a 4 mm hexagon key (see page 16).6 Retract insertion sensor shaft F fully.7 Unlock positioning collar E, slide down and lock at thedistance:30 mm (1.181.in.) + pipe thickness*.8 Open valve D fully with valve lever G.9 Lower insertion sensor until positioning E collar contactsnut B, with sensor tip at the required depth H.10 Tighten nut B to 40 Nm (30 ft lbf).*Refer to pipe supplier/manufacturer specification.Internal pipediameter (D)Figure 23 Setting the insertion depth – center linemethod for pipe diameters >1 m ≤2 m (>40 in ≤80 in)D2 +VP+