BABBITT LS7500, Руководство пользователя, Страница: 10 / 20

www.babbittinternational.com Reference Manual
2021
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3.4 Physical Installation
1) Install the LS7500 Presence/Absence into a recommended or “correct” section of pipe as outlined in
Figures 3-1 to 3-6 .
2) Position the orientation of the flange sensor as noted – refer to Section 3.2.1 Partial-ring or Section
3.2.2 Full-ring.
3) Mount the sensor between two 150# or 300# flat faced flanges (raised faced only if ordered raised
face). For use with other flanges contact factory.
4) Use full face gaskets compatible with the process material – refer to Section 3.2.3.
5) Tighten the flange bolts evenly to insure a proper seal.
a) All bolts should be put in place and evenly hand tightened.
b) All bolts should be tightened in 10 ft-lb increments using a star pattern.
c) Torque all bolts to 50ft-lb max.
6) The LS7500 has a 1” NPT conduit entry. When wiring these units, conform to the National Electrical
Code and any other city or company codes.
7) Always install the electrical connection into the 1” NPT on the LS7500 so water will not follow the
connection routing into the threads of the 1” NPT hub. To guarantee that condensation and water will
stay outside the unit, install an EYSM unilet before each LS7500 and fill with explosion proof sealing
cement.
CAUTION: Always take the necessary safety precautions when cutting or welding.
a) Tag and lock out the electrical power to the equipment that services the vessels.
b) Check liquid or dry powders that create a gas in the vessel for oxygen as well as the
explosion factor. (All dust will explode.)
c) Vessels that are cross vented have to be isolated.
3.5 Grounding
Proper installation of the LS7500 is critical to help ensure reliable operations. The most important
installation consideration is a proper sensor ground return. If the vessel is non-metallic (i.e. plastic or
plastic lined), a separate ground return must be provided. In such case, the ground return must consist of a
separate metal mounting flange, installed into a pipeline, adjacent to the sensor flange. A ground wire must
be installed between the ground screw on the sensor flange and the ground screw on the metal ground
flange, as shown in Figure 3-7.
3.6 Ground Continuity Test
Refer to Figure 3-7 below.
1) Turn power to LS7500 off.
2) Use ohm meter on lowest scale to check following:
a) Point A to B – less than 1 ohm
b) Point B to C (both ends of metal pipeline) – less than 1 ohm
c) Plastic Pipeline ONLY – Point B to D – less than 1 ohm