Liquid Controls LectroCount LCR 600, Инсталляционные компоненты

Страница: 8 / 78

Introduction
Alternate grounding method
Connect the green ground screw (inside the LectroCount housing in the upper right corner) to a known
good ground (less than 1 ohm). Use a 12 gauge or larger stranded wire.
FIXED INSTALLATIONS
LectroCount housings directly mounted to the meter are attached to the earth ground through the meter
via the tank and the tank piping ,which is grounded by the electrical system grounding rods. Division 1
fixed installations typically require metal conduit to the conduit hubs for the wiring. The metal conduit
provides the necessary ESD protection.
Divison 2 installations can ground the LectroCount housing by using shielded cables (or wiring) run
through liquidtite (metal/rubber coated). The liquidtite and the liquidtite connectors provide the necessary
ESD protection. AC fixed installations require and additional grounding method to ensure a proper
ground.
Alternate grounding method for AC fixed installations
Connect the green ground screw (inside the LectroCount housing in the upper right corner) to a known
good ground (less than 1 ohm). Use a 12ga. or larger stranded wire.
ESD Precaution
Opening LectroCount Registers
Follow this procedure each time you open a LectroCount register or approach a LectroCount register
with the door open.
Before opening the LectroCount register and handling the CPU board, it is important to discharge any
ESD that may have built up on your person. To discharge ESD from your person, touch a well-
grounded point such as the LectroCount register housing, the meter, the truck piping, or the bumper.
When the maintenance is complete and the LectroCount register door is closed, the CPU board is
protected from ESD by the LectroCount register housing which is grounded to the chassis.