Alicat MC Series Mass Flow Controller - Manual (Page 16)

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Mass Flow Rate: The mass fl ow rate is the volumetric fl ow rate corrected to a
standard temperature and pressure (typically 14.696 psia and 25 °C).
This parameter is located in the lower middle of the display. It can be moved to
the primary display by pushing the butt on below SCCM in this example. Your
display may show a diff erent unit of measure preceded by the lett er S.
To get an accurate volumetric or mass fl ow rate, the gas being measured
must be selected. See Gas Select, page 21.
MENU: Pressing MENU switches the screen to the Select Menu display.
Flashing Error Message: An error message (MOV = mass overrange, VOV
= volumetric overrange, POV = pressure overrange, TOV = temperature
overrange) fl ashes when a measured parameter exceeds the range of the
sensor. When any item fl ashes, neither the fl ashing parameter nor the
mass fl ow measurement is accurate. Reducing the value of the fl ashing parameter
to within specifi ed limits will return the unit to normal operati on and accuracy.
If the unit does not return to normal operati on contact Alicat.