Installing the 3ESP
5.
If you cannot easily see the pointers, you should align the sensor using the
north arrow on the handle. However, the alignment of the handle with the
sensors inside is less accurate than the metal pointers, so they should be used
wherever possible.
6.
The top panel of the 3ESP includes a spirit level:
Level the sensor using each of the adjustable feet of the instrument in turn,
until the bubble in the spirit level lies entirely within the inner circle. (The
instrument can operate with up to 2 ° of tilt, but with reduced performance).
7.
The feet are mounted on screw threads. To adjust the height of a foot, turn the
brass locking nut anticlockwise to loosen it, and rotate the foot so that it
screws either in or out. When you are happy with the height, tighten the brass
locking nut clockwise to secure the foot. When locked, the nut should be at the
bottom
of its travel for optimal noise performance.
11
Issue G - February 2016
