4
IV. GENERAL
MATHESON flowmeters combine construction and performance features essential to
accurate low flow measurement. This information is intended as a guide to efficient use;
careful compliance should result in long and useful service.
V. INSTALLATION
1.
Immediately after unpacking, inspect unit for any damage incurred during
shipment. Follow
instructions on “Damage or Shortage” slip in packing
container.
2.
If a unit is supplied with an integral valve then ensure that the valve is open.
3.
Check for free movement of float (s). Place meter horizontally on a flat
surface with the ball float (s) at the maximum flow end of the tube (outlet).
Incline this end of the meter approximately 10°. The float (s) should descend
at a constant rate. As the float (s) approach the zero reference mark, they may
slow down or hesitate. This is due to the close fit between the float and the
tube. Foreign particles occasionally prevent the continuous motion of the
float. Repeat the above operation several times. If the float sticks then see
the “
CLEANING PROCEDURE
” shown below.
4.
A 25 micron filter is recommended to be installed immediately upstream for
meters where dirt can interfere with operation.
