5) Set the display refresh rate
Change the display refresh rate will just alter the display update time, it will have no impact
on the meter’s measurement. The default refresh rate is 250 msec.
Available refresh rates are 250 msec (5. 25); 500 msec (5. 50); 1000 msec (5.100), and 2000
msec (5.200).
6) Set the upper flow rate alarm
This function allows the user to set a maximum allowable flow rate above which an alarm will
be triggered with a flashing screen.
7) Set the lower flow rate alarm
This function allows the user to set a minimum flow rate below which an alarm will be
triggered with a flashing screen.
8) Set the display decimal
The user can use this function to alter the default one decimal display. Options are listed
below for each flow range:
Table 5.2: decimal options
0 ~ 10, 20, 30, 40, 50 SLPM
9) Set the communication baud rate
This function allows a MENU entry of the RS485 or RS232 communication baud rate.
10) Set the GCF (the gas conversion factor)
The meter is normally calibrated with air at 20°C and 101.325 kPa. When the user wants to
set the standard conditions other than the specified temperature or applies the meter for
other allowable gases (please contact the manufacturer for the list of gases), it is possible to
use this gas conversion factor function to ensure the readings are correct and desired.
The default value of the GCF is 1000 (1.000). For example, if one wants to alter the standard
temperature to 0°C, the factor can be calculated using the gas equation: PV/T = constant:
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