Kurz Instruments Inc.
8/18/2010
360209-B Rev. B
B-series Operation
B - 13
Flow Meter Time Constant
Different factors are involved with controlling the speed of the MFT B-series.
•
Sensor Response Time (see Brochure)
•
Meter Filter time constant (see
configuration changes
section for adjustments)
Depending on the various settings, you can have a response time which is sensor limited
or over damped using the Meter Filter time constant. The net response is the cascade of
all the above. So even if the Meter Filter is at 0 seconds, the response time will still be
limited by the sensor.
Configuration Data Storage
The configuration data is stored in EEPROM on the MFT B- Series board. All
information about the flow meter is stored in this memory and is persistent between
power cycles of the meter. In addition, the original Factory configuration of the sensor
data and 4-20 mA calibration is stored in the EEPROM of the unit.
When making changes in
Program Mode
the changes are automatically saved to
EEPROM memory when the user exits from
Program Mode
.
Configuration, Upload/Download using Xmodem
The upload/download process allows the user to save the factory and field customized
configuration data to a remote file on a PC. This is done one of two ways, by using the
upload ascii command or using the Kurz Instruments program
which ships
with all meters. See the KZCOMM documentation for instructions on how to use the
program to transfer configuration files. The configuration file will transfer as a binary file
of about 4 kbytes in 5 seconds at 9600 baud. To initiate this using a terminal emulator,
enter the command:
<Esc>upload<Ret>,
where, <Esc> is the escape key on the keyboard followed by the text “upload” and <Ret>
is the enter or return key. A prompt will be displayed to indicate that the Xmodem
receive is ready to start on the PC. Using HyperTerminal, select Transfer, Receive File
and then select the file location and name in which the binary configuration file is to be
stored. If too much time is spent (more than 30 seconds) responding to the Xmodem
