Liquid Controls LCR 600 Setup & Op - Manual (Page 5)

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IntroductIon - lcr 600 InputS and outputS
lectrocount lcr 600 Inputs and outputs
The LCR 600 can communicate with a number of components on a Liquid Controls meter system. The following
pages provide a brief description of the components, a drawing identifying these components on the meter system,
and a list of the LCR 600 commands and fields that correspond to each component.
Internal pulSer
Typically, an internal pulser is mounted to the bottom
of the LCR 600 housing. A small shaft extends from
the bottom of the internal pulser through the LCR 600
housing where it attaches to a drive shaft. The drive
shaft turns directly off of the rotors inside the Liquid
Controls meter. When the internal pulser shaft spins, the
pulser manufactures a two channel quadrature pulse
output. The LCR 600 uses the pulse output to calculate
flow measurements. The number of pulses equal to a
unit of measurement is set during calibration and proving
in the Pulse/Unit :
field.
temperature probe
The optional temperature probe, part of the Electronic
Temperature Volume Compensation (ETVC) kit,
monitors the temperature of the product being
measured. Because the volume of many products
expand and constrict considerably according to
temperature fluctuations, the LCR 600 corrects the
volume measurement to a base temperature (60º F for
example).
prInter
Together, the LCR 600 and the Epson printer can print
out four types of tickets (delivery, duplicate delivery,
shift, and diagnostic). With the LCR 600 POS upgrade,
delivery tickets can be configured to print completely
priced tickets with complex tax and discount structures.
The LCR 600 provides a “require ticket feature” to meet
Weights & Measures standards and prevent unrecorded
deliveries.
S1 SolenoId
When energized by the LCR 600, the S1 solenoid-
operated valve opens the control valve on the outlet side
of the meter, allowing product to flow through the valve.
When the S1 is deengergized, the control valve shuts off
the product flow. The LCR 600 switches the S1 solenoid
via the selector switch (RUN and STOP positions) and
during two stage preset deliveries (according to the S1
Close:
value).
S2 SolenoId
The S2 solenoid-operated valve is used by two stage
meter systems to provide a dwell flow for preset
deliveries. Near the end of a two stage preset delivery,
the LCR 600 de-energizes the S1 solenoid-operated
valve to stop product flow. At the same time, the LCR
600 energizes the S2 solenoid to open a bypass pipe
through which the remainder of the preset delivery
passes. The solenoids are switched at a preset
remaining volume or price determined by the value of
the LCR 600 field S1 Close:.
S3 SolenoId
The S3 solenoid opens and close the vent ports of the
meter system’s optical air (or vapor) eliminator. The LCR
600 energizes and de-energizes the S3 according to the
optical sensor’s reading.
optIcal SenSor
An optical sensor detects the presence of liquid inside
optical air (or vapor) eliminators. When the optical
sensor does not detect liquid inside the optical air (or
vapor) eliminator cavity, the LCR 600 de-energizes the
S1 solenoid-operated valve and causes the control valve
to close. At the same time, the optical sensor energizes
the S3 solenoid-operated valve, opening the vent ports.
As the air and vapor evacuates the cavity, the liquid
level rises. When the level reaches the optical sensor,
the sensor detects the liquid. The LCR 600 energizes
the S1 solenoid, which opens the control valve, and
deenergizes the S3 solenoid, sealing the vent ports.
∆P Transducer
The differential pressure transducer, common in
aviation applications, monitors the differential pressure
(pressure drop) across a full flow fuel monitor/water
coalescer. The highest differential pressure reached
during the custody transfer is printed on the delivery
ticket and displayed on the screen. If the differential
pressure reaches a dangerous level, the LCR 600 can
shut down the delivery. To set up a differential pressure
shutdown value, a shutdown device (such as a valve or
a dead-man) must be connected to the LCR 600, and
a differential pressure shutdown value must be entered
into the dP Shutdown Value:
field.
auxIlIary outputS
The LCR 600 provides three open drain transistor
auxiliary outputs for different external devices such as
pump controls and additive injectors. Two of the outputs
have settings that can be set in the Auxiliary 1
Output:
(Off, On, On During Delivery, and Monitor
Flowrate) and Auxiliary 2 Output: (Off, On, On
During Delivery, and Flow Direction) fields. The LCR
600 also provides auxiliary output connections for the
LectroCount Remote Display (other types of displays
are usually compatible). Signals from these outputs
duplicate the volume data sent to the LCR 600 display.