ITT PumpSmart PS220, Руководство по конфигурации и эксплуатации

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PS220 Configuration & Operation Guide
PS220 220
Functions &
Features
Specific Gravity
Specific Gravity is not always a constant value in a pumping system. It can be a different value if a pump is used on a
batch application or vary widely based on the temperature of the process fluids.
SMARTFLOW, Smart TDH, and significant portions of the PumpSmart PS220 Control and Protection logic will need to use
this feedback as the values change to maintain the performance and accuracy of these functions.
The Specific Gravity feature of the PS220 is that it can account for these types of changes as follows:
1. SG RATED (Fixed)
The default value for Specific Gravity [SG] is 1.0. The Smartflow Wizard will allow you to change this during configuration
of SmartFlow. It may be accessed directly by going to parameter 78.03(SG Rate).
If the Specific Gravity varies by more than 5% a correction method will be necessary as the accuracy of the value of Smart-
flow will be decreased.
2. Specific Gravity (Variable)
1. Fluid Temperature measured with Transmitter:
When changes in the Specific Gravity are directly related to changes of the fluid’s temperature, the PumpSmart PS220 can
monitor a temperature transmitter, and use values to update the calculated flow continuously. An unused Analog Input
will be required. To calculate the variable Specific Gravity based on temperature changes, six points of data are required.
TEMP MAX @ S.G. MAX
TEMP RATE @ S.G. RATE
TEMP MIN @ S.G. MIN.
This data can be found in most fluid handling property manuals.
NOTE:
Configuration of the Analog Transmitter used for Variable Specific Gravity will not be a step in the Smartflow Wizard. This
can be configured using the I/O wizard. To access this from the Home View follow the path: Menu>PS220 Configura-
tion>I/O Configuration>Select the Analog Input #> Please refer to the Analog Input/Output Wizard In this manual for
more information.
3. Specific Gravity measured directly with a Transmitter:
Specific Gravity values that vary linearly, can be measured directly with a transmitter, using an Analog Input to use the
values in the internal Smartflow calculations.
Notes:
1. Complete configuration of the Specific Gravity’s Analog Transmitter will not be accomplished with the Smartflow
Wizard. The Identity of the transmitter will need to be configured with the PS220 I/O Configuration Wizard. To access
this from the Home View follow the path: Menu>PS220 Configuration>I/O Configuration>Select the Analog Input #>
Please refer to the I/O Wizard In this manual for more information if required.