AUF610 Series Operation Manual
OP610.1.1.5R1ENG
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3.10 How to use the zero-cutoff function?
The number displayed in window M41 is called the low-flow cutoff value. The flow meter will replace these
any flow rate below this value with zero. This is used in situation where hydraulic or ambient noise is
causing a flow reading in a pipe where there is no flow. This ensures that the flow meter will not totalize
false value.
3.11 How to setup a zero point?
There exists a ‘Zero Point’ with certain installation which means the flow meter will display a non-zero
value when the flow is absolutely stopped. In this case, setting a zero point with the function in window
M42 will bring a more accurate measurement result.
Make sure that the flow is absolutely stopped, then run the function in window M42 by pressing the ENT
key.
3.12 How to get a scale factor for calibration?
A scale factor is the ratio between the ‘actual flow rate’ and the indicated value by the flow meter.
Knowledgeable plant personnel should only use this as properly set up the meter is accurate.
The scale factor can be determined by calibration with flow calibration equipment.
3.13 How to use the operation locker?
The system locker provides a means of preventing inadvertent configuration changes or totalizer resets.
When the system is locked, menu window browsing can be done without affecting any change, but any
modifications are prohibited.
The system can be locked without a password or with a one 1 to 4 digit password. With a no-password
locking, directly press the ENT key when the password input prompt displays. If the password is forgotten,
please contact the factory.
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 AUF610 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 200Hz is going to be required for other instrumentation. The user should enter 0 in
M68 AND 3000IN 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
option reading like ‘FO output’ to direct the frequency output to the OCT OUTPUT hardware device.
