Turbines Incorporated
Cryogenic Flow Delivery System
CDS1000 Manual (Rev E)
CDS1000 Page
5
Description
The
CDS1000
Flow Monitor is a microcontroller based rate/totalizer that is capable of
calculating the effects of changes in temperature on computed values.
Features:
-
Real time graphics and display of operating parameters
-
Programmable 2-10 point flow meter linearization
-
Delivery total can be toggled between metered and base conditions
-
Battery backup for intermittent power outages
-
All features/configuration settings are field programmable with plain text menus
-
Pump control based on temperature to protect pump seals
-
Optional pump control based on pump discharge pressure to further protect pump seals
-
Large graphical display for showing various flow parameters
-
Backlight for low light display viewing
-
Built-in self test system of diagnostics
-
Comprehensive internal warning and error reporting system
-
Pump and turbine maintenance timers
-
Non-resettable “Grand” totalizer
-
RS-232 and Bluetooth communications available
-
Level 3 Audit trail for all sealable meteorological parameters
Overview:
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
CDS1000
. 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 or RS232
communications depending on which data collection device or printer is selected. This
unique integrated system provides the end user a configurable, compact total delivery system.
Theory of Operation:
The
TI
turbine flowmeter is a velocity measurement device that measures fluid velocity and
volume 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.
TI
turbine flow meters 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 its
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 product density is influenced by fluid temperature; volumetric
flow meters require temperature to be measured and calculated into the final summation for
the displayed total to be exact. A temperature compensation algorithm accomplishes this by
