Alicat MC Series Mass Flow Controller - Manual (Page 24)

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MISCELLANEOUS
Miscellaneous is accessed by pressing the MISC button on the Select Menu display.
Next select either MISC1 or MISC2.
MISC1 will display as shown at left.
ZERO BAND refers to Display Zero Deadband.
Zero deadband is a value below which the display
jumps to zero. This deadband is often desired to
prevent electrical noise from showing up on the
display as minor flows or pressures that do not
exist. Display Zero Deadband does not affect the
analog or digital signal outputs.
ZERO BAND can be adjusted between 0 and
3.2% of the sensor’s Full Scale (FS).
Press ZERO BAND. Then use SELECT to choose
the digit with the arrow and the UP and DOWN
buttons to change the value. Press SET to record
your value. Press CLEAR to return to zero.
Pressure Averaging and Flow Averaging may
be useful to make it easier to read and interpret
rapidly fluctuating pressures and flows. Pressure
and flow averaging can be adjusted between 1
(no averaging) and 256 (maximum averaging).
These are geometric running averages where
the number between 1 and 256 can be
considered roughly equivalent to the response
time constant in milliseconds.
This can be effective at “smoothing” high frequency process oscillations such as
those caused by diaphragm pumps.
Press PRESS AVG. Then use SELECT to choose the digit with the arrow and the UP and
DOWN buttons to change the value. Press SET to record your value. Press CLEAR to
return to zero.
Press FLOW AVG. Then use SELECT to choose the
digit with the arrow and the UP and DOWN buttons
to change the value. Press SET to record your value.
Press CLEAR to return to zero.
Setting a higher number will equal a smoother
display.
LCD CONTRAST: The display contrast can be
adjusted between 0 and 30, with zero being the
lightest and 30 being the darkest. Use the UP
and DOWN buttons to adjust the contrast. Press
SET when you are satisfied. Press CANCEL to
return to the MISC display.
PRESS
AVG
BACK
LCD
CONTRAST MAIN
ZERO
BAND
FLOW
AVG
DOWN
CANCEL CLEAR SET
UP SELECT
0.0
>
DOWN
CANCEL RESET SET
UP
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