Sensor Installation and Connection 5-69
6. Reference the bubble level as you tighten the knob on the
Mounting Bar in the manhole frame to ensure that the bar will
provide a level sensor mounting surface.
Ensuring Mounting Bar is level
7. Twist the locking nut counterclockwise to extend the mounting
bar, spanning the diameter of the frame. Ensure the bar is
secure by grabbing and vigorously pulling on it to confirm it
will not move.
Confirming secure positioning
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