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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 600 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.
reGIsTers noT MounTed dIreCTly To The MeTer
In typical LectroCount installations where the LectroCount register is mounted directly to the meter, the LectroCount
housing is grounded through the meter. If the register is not mounted on the meter, you must make sure the
LectroCount housing is grounded properly.
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 12ga. 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.
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.
.
esd Precaution
.
Opening LectroCount Registers
sPeCIfICaTIons
Materials of Construction
• Aluminum Alloy ADC12
• Powder Coat: Corro-Coat PE 74-141 Polyester
Weight
• 8.75 lbs (4 kg)
Display Elements
• Liquid crystal display
• 320 X 240 pixels
Cable Entry
• ½″ NPT (5)
• ¾″ NPT (2)
Temperature Rating
• -40 to 158 °F (-40 to 70 °C)
Mechanical
electrical
Input Voltage
Voltage:
9 to 28 VDC
Current
maximum
:
4.5 A
maximum
(including solenoid valves and display heater)
Pulse Output
Voltage
peak to peak
:
5 to 28 V
Frequency
maximum
:
7500 Hz
Scale Pulse Output
Current
sinking capability
:
150 mA
Electrical Protection
• 5 A fuse
on power cable
Communications
• RS-232: EIA-232E standard
•
RS-485:
SAE J1708 standard
Auxiliary 1 Output
Current
sinking capability
:
1 A
Auxiliary 2 Output
Current
sinking capability
:
150 mA
Solenoid 1 Output
Voltage:
10.2 to 27.2 VDC
Current
1 A
maximum
Solenoid 2 Output
Voltage:
10.2 to 27.2 VDC
Current
1 A
maximum
Solenoid 3 Output
Voltage:
10.2 to 27.2 VDC
Current
1 A
maximum
Optical Sensor
Voltage:
10 to 28 VDC
Current
0.5 A
maximum
RTD Temperature Probe
• 4 wire platinum sensor
• 100 Ω resistance at 0 ºC
• 138.5 Ω resistance at 100 ºC
Printer (Epson Model 295)
Voltage:
24 VDC
Current:
0.8 A
maximum
Operating Temperature:
-22 to 104 ºF (-30 to 40 ºC)
Remote Electronic Display
• 1 A
sinking capability
Input/output
