4.10
How to use the zero-cutoff function
The number displayed in window M41 is called the lower flow rate cut-off value. The flow meter will
replace these flow rate values that are absolutely less than the low-cutoff value with ‘0’. This means the
flow meter will avoid any invalid accumulation when the actual flow is below the zero-cutoff value.
Generally the default value is 0.03m/s
The low-cutoff value does not affect the flow measurement when the actual flow is absolutely greater
than the low-cutoff value.
4.11
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 there is no liquid running inside the pipe, and then run the function in window M42 by
pressing the ENT key.
4.12
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.
It can be determined by calibration with standard flow calibration equipment. You may change the scale
factor in menu window M45.
The scale factor can be determined by calibration with flow calibration equipment.
4.13
How to use the system 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 1 to 4 digit password. With a no-password
locking, directly press the ENT key in M47
If the password is forgotten, please contact the factory.
4.14
How to use 4-20mA current loop output
The accuracy of the current loop output is better than 0.1%. It can be configured to different mode,
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