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Products > Cryogenic Equipment > |
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Model T675 Delivery System
Totalizer |
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Introduction |
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The Model T675 Delivery System is a thoroughly
engineered electronic totalizing system that incorporates the latest
technology and provides the most comprehensive features available to
the industry. The T675 is designed to accurately compute and display
in real time, pertinent flow parameters in both digital and graphic
form. The displayed total of the product being delivered is
continually corrected for the temperature of the product. Additional
accuracy can be acquired by linearizing the turbine
flowmeter input signal. The T675 math processor permits direct reading
of product totals in any desired engineering unit i.e., pounds,
gallons, liters, scf etc. |
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This next generation system delivers the
most sought after system enhancements while maintaining a
user-friendly simplicity of operation. The Model T675 configuration
settings can be reprogrammed in the field with relative ease.
Programming the T675 is simply a matter of selecting the desired
operating criteria from an all-inclusive menu thus eliminating the
need to scroll through an entire flow chart to enter or change select
data. Display of various flow properties such as temperature and flow
limits, fluid density and equivalent volume is achieved automatically
with the selection of product to be measured and turbine size. |
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Fault
detection and identification has never been easier. In addition to
standard alarm icons the T675 provides a “Detail Screen” that lists
operating conditions such as supply voltage, internal battery voltage,
signal input frequency, coil and RTD resistance, product and fluid
temperature to name a few. Additionally, a System Alarm Log catalogs
16 events. |
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The T675 Maintenance program with ICON reminders can be customized to
account for the varying operating conditions that exist between
installations. This feature allows the end user to extract maximum
real world service intervals without sacrificing effective
maintenance. |
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Features |
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Easy to program, operate and
understand. |
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3x5 backlit full graphics display. |
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Dual microprocessors for real-time
graphics, display of totals, temperature, pressure, flowrate and
alarms. |
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Password protected configuration and
calibration parameters. |
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Temperature Compensator supports 8
individual products, LOX, LIN, LAR, CO2, CCO2, LNG, LNO2, MAPP. |
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'Softkeys' simplify display operation. |
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Selectable 2 – 10 point flowmeter
linearization. |
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Automatic delivery system maintenance
reminders based on a date and/or turbine hours of operation. |
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Audit trail documents Kfactor changes
with date stamp, displaying the most current on the operating
screen. |
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System alarm log simplifies fault
identification. |
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Totalizer will withstand complete loss
of power for 1 second, then save all operating data. |
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Restores to previous operating mode
after power restoration. |
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Programmable Pump Control features
protect the delivery system and increases service life. |
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Bluetooth, Infrared and RS-232
communication ports. |
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IR interface with Models SP824, SP834
Portable Printers. |
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Easily compatible with other
printers. |
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System Overview |
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When introduced to flow the turbine flowmeter generates an AC sinewave
signal within the pickup coil located directly above the turbine’s
rotor. The signal of the pickup coil is amplified, divided, corrected
and displayed by the T675. The displayed total is corrected for
temperature by sensing the resistance of the RTD temperature probe.
Delivery information, consisting of 17 selectable parameters, is
transmitted via Bluetooth, the Infrared (I.R.) or RS232 communications
port depending on which data collection device or printer is selected.
This unique integrated system provides the end user a configurable,
compact total delivery system. |
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Theory of Operation |
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The SI turbine flowmeter is a volumetric measurement device that
measures fluid velocity with one moving component, the rotor. The
momentum of the flowing fluid engages the low mass rotor resulting in
the rotor rotating at an angular velocity that is proportional to the
fluid velocity. The rotor’s rotation generates an AC sinewave signal
in the pickup coil. SCI turbine flowmeters are linear devices
therefore the signal output frequency is proportional to the flowrate
within the designed flow range. Another benefit of a linear turbine
meter is it’s Kfactor, the number of pulses generated per unit volume
(gallons, pounds etc.) is consistent over the entire flow range. The
total number of pulses generated is directly related to the total
volume. The displayed total in the desired engineering unit is
acquired by dividing the total pulses by the Kfactor. Because
volumetric flowmeters and product density are influenced by fluid
temperature, temperature must be measured and calculated into the
final summation for the displayed total to be exact. A temperature
compensation algorithm accomplishes this by computing the fluid
density for the measured temperature and adjusts the volumetric or
mass delivery total. |
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Simply stated, temperature compensation adds pulses to the pulse total
when the detected temperature is colder than the products reference
temperature and subtracts pulses when the product temperature is
warmer than the reference temperature. The rate at which the pulses
are added or subtracted is determined by the measured temperature
departure from the products reference temperature. |
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