FlowVis® - INSTRUCTION MANUAL
Page 6
9.0
OPERATION
The FlowVis® is factory-calibrated to
be extremely accurate across its full
operating range. Any ‘inaccuracy’ is
related to the angle in which the scale
is read. To avoid so-called ‘parallax
error’, it is important to position your
eye so that you are looking squarely
at the tip of the indicator arm. To
achieve this, simply move your head so
that you just lose sight of the vertical
leading edge of the red arm.
NOTE:
Slowly move your head in
this direction to the point where the
leading edge of the indicating arm is
not visible.
10.0
MAINTENANCE
Although FlowVis® is designed to be maintenance-free, periodic checks should be made
to the following:
Item
Check for
Remedy
‘O’ ring seal
Check for leaks
Replace ‘O’ ring
Valve Body
Check for cracks or damage
Replace entire FlowVis®
Lid
Check for cracks or damage
Replace entire FlowVis®
Indicator Arm
Check to see if sticking due to
build up of debris
Remove lid and fl ush out
debris
Lid
Air bubbles in lid
Check plumbing system for
air leak
