Apex Digital MASS FLOW METER, Руководство по эксплуатации

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2020.07.24 • REV. 2 • MASS FLOW METER OPERATING MANUAL
29
Sensor Setup
The Sensor Setup Menu contains advanced settings that govern how the
flow and pressure sensors report their data.
Menu
→
Advanced Setup
→
Sensor Setup
•
DISPLAY AS ZERO
defines the zero band
threshold under which flow values
are displayed as 0, and the current
setting. The maximum zero band is
6.38% . This function also applies to
gauge pressure readings when using
the optional barometer. For example,
a 20-slpm meter with a zero band
value of 0.25% would display as 0 slpm
for all readings below 0.05 slpm.
•
NUM OF DIGITS
sets the number of digits
to display flow readings on-screen and
in the serial data frame. Older devices
typically had one less significant digit,
and newer devices can be set to match.
•
BACK
returns to the top-level
menu ( page 20 ).
•
AVERAGING
adjusts the time constants
of the geometric running averages for
flow and pressure. These are changed
independently via
PRESS AVG
and
FLOW
AVG
in the Averaging Menu, which also
displays the current settings. Values
roughly correspond to the time constant
(in milliseconds) of the averaged
values. Higher numbers generate a
greater smoothing effect on rapidly
fluctuating readings (maximum 255 ms).
•
MAIN
exits to the Main
Display ( page 17 ).
✓
Note: Deadband settings do not affect
the values reported in the serial data.
DISPLAY NUM OF
AS ZERO DIGITS
2.50%
AVER-
BACK AGING MAIN
The Sensor Setup Menu.
UP DOWN SELECT
DIGIT
+-Zero: % Full Scale
0.00
^
BACK/
CANCEL CLEAR SET
The Display as Zero Menu.
UP DOWN SELECT
DIGIT
Avg Time Const: msec
001
^
BACK/
CANCEL CLEAR SET
The Averaging Menu.