Liquid Controls LectroCount LCR-II E3657 Series, Руководство по установке

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esd ProTeCTIon
Potential damages Caused by exposure to esd
To prevent electrostatic discharge (ESD) damage to LectroCount register electronic components, all LectroCount
electronic register truck intallations are required to properly ground truck seat(s) cushions and Epson printers.
Prolonged exposure to ESD over weeks, months, or years can corrupt LectroCount registers’ CPU memory and
damage the electronic components in LectroCount registers (as well as other electrical components in the truck’s
electrical system).
Adjustable, shock-absorbing seats, if not grounded correctly, generate significant amounts of ESD. The pivots and
hinges of these seats isolate the seat cushion from an electrical ground. Without an electrical ground, ESD builds
between the seat cushion and the operator. This built-up ESD can be transferred back to the LectroCount register
from any point of the truck’s electrical system, such as the cabling from the LectroCount register to the cab or the
Epson printer.
liquid Controls’ Grounding Kits
To protect electronic components from ESD, all LectroCount truck intallations must include the installation of the
LectroCount Ground Strap Kit (PN 82185) and the Epson Printer Ground Wire Kit (PN 82184). Properly grounded
seats allow static electricity to “bleed off” the driver and the seat before it can build up, discharge, and damage the
LectroCount register or any of the truck’s other electrical components.
The LectroCount Ground Strap Kit will be included with all future LCR-II LectroCount register shipments, and the
Epson Printer Ground Wire Kit will be included with all future Epson printer cable kit shipments. Effected part numbers
are listed below. For existing installations and previously purchased LectroCount registers and Epson printers, both
ground kits are available from LC.
esd Procedural Precautions and lectroCount register Grounding
Installation notes
When installing or performing maintenance on a LectroCount register, there are certain guidelines that must be
followed to safeguard against ESD damage.
Grounding method
Connect the ground screw (on the rear of LectroCount housing in the upper left corner) to a known good ground (less than 1
Ω). Use a 12 ga. 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. Divison 2 or Zone II 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.
Grounding method for AC fixed installations
Connect the ground screw (on the rear of LectroCount housing in the upper left corner) to a known good ground (less than 1
Ω ). Use a 12 ga. or larger stranded wire.
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. Wipe the unit with a damp cloth before opening the cover. 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.
.
esd Precaution
.
Opening LectroCount Registers
safeTy MarKInGs
The equipment is Listed by UL to applicable US and Canadian standards for use in hazardous locations under Liquid Controls file
E180172
Class I
Potentially Explosive Gas/Vapor Atmospheres
dIvIsIon 2
Gases and vapor are not normally present in an explosive concentration but may accidentally exist during abnormal operations
GrouPs C & d
Flammable/explosive Gas groups
T6
Temperature class for surface temperature limitations. T6 is ≤ 85º C
-40°C ≤ T amb ≤ 70°C
Safe limits of ambient temperature
IP66 and neMa 4
Ingress protection: dust tight and protected against powerful water jetting
Consult factory for current compliance status.
LectroCount LCR-II electronic registers are shipped
with one of two nameplates. One nameplate is
applied to UL-Listed units. The other nameplate is
applied to IECEx / INMETRO / ATEX certified units.
Two Nameplates