Installation 4.5 Grounding The 4590 TSM must be grounded to the tank potential before communication and power connections are made. The connections (A ³ 4mm2) from each outer ground plug of the 4590 TSM to the tank ground must be made before any other wiring connections are made. All grounding must be compliant with local and company regulations and checked before the equipment is commissioned. A > 4 mm2 Tank Ground Figure 4-7: Grounding Diagram It is recommended to connect the cable shields of the tank instrumentation centrally to the 4590 TSM. See Section 5.2.3.3, "Grounding of the cable screen (for 7500 Series Radar Tank Gauges)" on page 31 for more information. 4.6 Post-installation Check After the 4590 TSM has been installed, perform the following checks: • Is the measuring instrument damaged (visual check)? • Have the mounting bolts been tightened securely? • Are both grounding terminals connected to tank ground? 18 Installation and Operations Manual
