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

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lectroCount lCr-II overview
General InforMaTIon
The Liquid Controls LectroCount LCR-II is a
microprocessor-based electronic meter register that
can be used for Weights & Measures approved custody
transfer actions in mobile or fixed installations. The
LCR-II can control a meter system as a stand-alone
unit, or it can be used as a slave to a host contoller such
as a process controller or an in-cab data management
system.
InPuTs
In order to calculate flow measurements from a positive
displacement meter, the LCR-II receives a pulse input
from an internally mounted quadrature pulser that is
mechanically connected to the flow meter (retrofit kits
are available for installation onto Neptune, Brooks,
and Smith positive displacement meters). This pulse
output can also come from a Liquid Controls external
POD pulser or another pulse generator. In addition to
the pulse input, the LCR-II is equipped with an input for
a temperature probe, so the register can compensate
volume measurements according to the temperature of
the product.
ouTPuTs
The LCR-II is equipped with a scaled pulse output, two
auxiliary outputs, and two solenoids outputs. These
outputs allow the LCR-II to communicate with meter
system accessories such as solenoid-controlled valves,
optical air and vapor eliminators, remote displays,
printers, and third-party devices.
CoMMunICaTIons
The LCR-II is capable of interfacing in RS-232 and RS-
485 communication protocols.
HousInG
The LectroCount LCR-II housing and base are aluminum
die cast and powder coated. The hinge door design
provides easy access to the internal connections and
a Weights and Measures sealable fastener opposite
the hinges. There are seven machined ports, five ½”
NPT ports and two ¾” NPT ports, on the back of the
LectroCount LCR-II to provide secure cable connections
for all external devices.
dIsPlay
The 1” display is a six character, backlit LCD display.
navIGaTIon Keys
The LCR-II has two domed navigation keys to perform
basic configuration and functions. The keys collapse
and recover to give a tactile, positive confirmation of
keystrokes.
seleCTor sWITCH
The selector switch controls basic stop, run, print, and
shift print delivery functions. To perform calibration
functions, the cover plate must be removed and the
selector switch turned to the six o’clock position.
funCTIonalITy and oPeraTIon
The principle functions of the LectroCount registers
include:
• Calibration (single and multipoint)
• Weights & Measures custody transfer
(product delivery and ticket generation)
• Metrological data collection
• Presetting by volume
• Multiple production selection
• Security settings
• Air and vapor elimination (with proper accessories)
• Valve control (with proper accessories)
• Electronic temperature volume compensation
(ETVC) (with proper accessories)
lCr-II overvIeW
M7 Meter with LectroCount LCR-II Electronic Register, Optical
Air Eliminator, High Capacity Strainer, and E-7 Valve
Optical Air Eliminator
Refined Fuels
Mechanical Air
Eliminator and High
Capacity Strainer
Optical Vapor Eliminator
LPG and NH
3
Solenoid Block
Valve
ETVC Kit
E-7 Valve
Meter system Components
MeTer sysTeM
A Liquid Controls meter system not only accurately
measures product, it also regulates and purifies product
flow in order to produce the optimal conditions for
measurement. Optimal systems typically include an air/
vapor eliminator, strainer, meter, register, and control
valve. The LectroCount LCR-II, a register, serves as the
central controller of the meter system. Most components
in the meter system are hard wired to the LCR-II via data
communication cables. See manual M100-10.
aIr/vaPor elIMInaTors
Air and vapor eliminators sense and remove air or
vapor in the piping before it enters the metering system,
ensuring that only liquid will pass through the meter for
measurement. Mechanical air eliminators do not require
a data connection to the LectroCount LCR-II (in LPG
applications, they are often plumbed to a 3-way solenoid
which is wired to the LectroCount LCR-II). Optical air
eliminators use an optical sensor to monitor liquid levels
and a solenoid-actuated valve to turn the vapor vent on
and off. The optical sensor and the solenoid valve are
connected to the LectroCount LCR-II by separate data
cables. See manuals M300-20 and M300-21.
valves
Valves control the flow through a metering system. They
open the line to initiate custody transfers and close the
line to stop custody transfers. Some valves can partially
close, slowing the flow rate to a dwell flow on preset
deliveries. By slowing the flow rate, valves can lessen
the hydraulic shock incurred by the meter system upon
shut off and provide accurate preset deliveries. Many
valves use solenoid-operated valves that require a hard
wired data connection to the LectroCount LCR-II. See
manuals M400-11 and M400-40.
eleCTronIC TeMPeraTure voluMe
CoMPensaTIon (eTvC) KIT
In order to perform temperature compensation
equations, the LectroCount LCR-II relies on a
temperature probe inserted into the strainer housing.
Installation directions for the ETVC kit are included in
this manual.
MeTer sysTeM overvIeW