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FDT-25 Handheld Ultrasonic Flowmeter
§3.14 How to use the built-in data logger
The data logger has a space of 24K bytes of memory, which will hold about 2000 lines of data.
Use M50 to turn on the logger and for the selection for the items that is going to be logged.
Use M51 for the times when the logging begins and at how long an interval sustains and how long
the data logging will last.
Use M52 for the direction of logging data. The default setting will permit the logging data to be
stored in the logger buffer.
Logging data can be redirected to the RS-232C interface without being stored into the logger buffer.
Use M53 to view the data in the logger buffer.
Dumping the logging data through the RS-232C interface and the clearing of the buffer can be
operated with a function in window M52.
§3.15 How to use the Frequency Output
There is a Frequency Output in all series flow meters. This frequency output signal, which
represents the flow rate, is intended to connect with other instruments.
The Frequency Output is totally user-configurable. Generally, four parameters should be configured
for the setups.
Enter the lower flow rate value in window M68 and the higher flow rate value in window M69.
Enter the frequency range in window M67.
For example, assume that the flow rate varies in a range 0m3/h to 3000m3/h, and an output signal
is at a maximum frequency of 1000Hz, the minimum of 200Hz is going to be required for other
instrumentation. The user should enter 0 in M68 and 3000 in M69, and enter 200 and 1000 in window
M67.
Please note that the user has to make the selection with OCT setups in window M78 by selecting
the 13
th
option reading like ‘FO output’ to direct the frequency output to the OCT OUTPUT hardware
device.
§3.16 How to use the Totalizer Pulse Output
The totalizer output will produce a pulse output with every unit flow of the totalizer.
Refer §3.4 and §3.5 for the setups of the totalizer units and multiplier.
The totalizer pulse output can only be realized by mapping the pulse output to the OCT or BUZZER
hardware devices.
For example, assume that the POS totalizer pulse output is needed, and every pulse should represent
0.1cubic meter of liquid flow; the pulse output will be mapped to the internal Buzzer, so that with
every 0.1 cubic meter of flow the BUZZER will beep for a while.
