Hach Flo-Dar, Руководство пользователя

Страница: 26 / 44

24
Installation
3.2.2.7 Make a final alignment check
The correct vertical and horizontal alignment of the sensor is necessary for accurate
measurements.
1. Measure the vertical alignment ( section 3.2.2.4 on page 21 or section 3.2.2.5 on
page 22 ) and make adjustments if necessary.
2. Measure the horizontal alignment ( section 3.2.2.6 on page 23 ) and make
adjustments if necessary.
3. Repeat steps 1 and 2 until no further adjustments are necessary.
3.2.2.8 Optional extended depth sensor installation
The extended depth sensor ( Figure 13 ) can be used when the pipe or channel depth
exceeds the standard level specifications (refer to Specifications on page 3 ).
Use the extended frame ( Figure 14 ) in place of the standard frame, or mount the
extended depth sensor on the wall.
The extended depth sensor must be installed at least 18 inches above the crown of the
pipe for correct measurements. The extended depth sensor has a deadband zone of
17 inches where the sensor is not active.
Figure 13 Extended sensor dimensions