Alicat MC Series Mass Flow Controller - Manual (Page 15)

15
MAIN
This mode defaults on power up, with
mass fl ow as the primary displayed
parameter.
The following parameters are displayed in
the Main mode.
Gas Absolute Pressure: This sensor
references hard vacuum and reads
incoming pressure both above and below
local atmospheric pressure. This parameter
is moved to the primary display by pushing
the butt on above PSIA.
The engineering unit associated with
absolute pressure is pounds per square
inch absolute (psia). This can be converted
to gage pressure (psig) by subtracti ng local atmospheric pressure from the
absolute pressure reading:
PSIG = PSIA – (Local Atmospheric Pressure)
Gas Temperature: MC-Series fl ow
controllers measure the incoming
temperature of the gas fl ow. The
temperature is displayed in degrees Celsius
(°C). This parameter is moved to the primary
display by pushing the butt on above °C.
Pushing the butt on again allows you to
select 0C (Celsius), 0K (Kelvin), 0F (Fahrenheit)
or 0R (Rankine) for the temperature scale.
To select a temperature scale, use the LN-UP
and LN-DN butt ons to positi on the arrow in
front of the desired scale.
Press SET to record your selecti on and
return to the MAIN display. The selected
temperature scale will be displayed on the screen.
Set Point: The set-point (SETPT)is shown in the upper right of the display.
For informati on on changing the set-point see SETPT SOURCE, page 18.
Volumetric Flow Rate: This parameter is located in the lower left of the display.
It is moved to the primary display by pushing the butt on below CCM in this
example. Your display may show a diff erent unit of measure.
#C
+21.50
+0.00
CCM MENU
SETPT
+0.00
SCCM
Air
PSIA
+13.60
+0.00
SCCM
LN-DN
CANCEL SET
MODE
>#C
#K
#F
#R
LN-UP
+0.00
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