5.4.3. Detailed descriptions of the functions
0) Keyboard security
This function allows the user to disable the keyboard entry after the meter is set as desired. It
will prevent any accidental key entry that may alter the settings. At the MENU, select “lock”
to lock the keyboard.
1) Reset the accumulated flow rate
The maximum accumulated flow rate that can be registered by the meter is 99,999,999 SL.
Once the value is reached, the accumulating function will stop processing the data. It is
necessary to reset the register for the continuation of this function.
Use this function with caution as it will delete all current accumulated flow rate data.
2) Reset or calibrate the offset
Sometimes or after a long time of use (i.e., over 1 year of usage), the sensor surface could
have a thin deposit from the environment if the gas is not super clean. Depending on the
actual case, this deposit might or might slightly change the thermal sensitivity of the sensor
resulting in a drift of the offset or a tiny flow at the zero flow in the pipeline. Use this function
to reset the offset will not have an impact on the meter performance if such an offset is
outside of the 100:1 calibrated range.
Use this function with caution and make sure there is no flow when executing this function,
otherwise, it may incur some additional errors to the measurement.
3) Set the Modbus address of the meter
Use this function to set the RS485 Modbus address of the meter. This setting can also be
done via the RS485 communication.
4) Set the response time
Use this function to change the response time of the meter. The default one is 10 msec.
Increasing the response time will allow more data to average and output a stabler flow rate if
the actual flow rate may have some undesired fluctuation.
Available response time is 10 msec (4. 1); 20 msec (4. 2); 50 msec (4. 5); 100 msec (4. 10); 200
msec (4. 20); 500 msec (4. 50), and 1000 msec (4.100)
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