6
Chapter 3
Time Constant
The time constant is an averaging period. It is
used to dampen the display. If you are
experiencing fluctuating flows, a longer time
constant will slow down those fluctuations.
The display will update every second, but the
displayed reading will be the average over the
last time constant period. For example, if the
time constant is 10 seconds, the display will
update every second, but the displayed
reading will be the average from the last 10
seconds. This is also referred to as a “moving
average”.
Log Interval
The logging interval is a frequency period that
the instrument will log readings. For example,
if the logging interval is set to 30 minutes,
each sample will be the average of the last 30
minutes.
Menus
DISPLAY SETUP
Display setup menu is where you will setup the desired parameters to
be displayed on the running screen. With a parameter highlighted you
can then use the
ON
soft key to have it show up on the running
screen or select the
OFF
soft key to turn off the parameter. Use
PRIMARY soft key to have a parameter show up on the running
screen in a larger display. Only one parameter can be selected as a
primary, and up to 2 secondary parameters can be selected at one
time.
PRESSURE ZERO
To zero the pressure reading, select the Pressure Zero menu. The
instrument will indicate if the pressure zero was successful.
SETTINGS
Settings menu is where you can set the general settings. These
include Language, Beeper, Select Units, Time Constant, Contrast,
Set Time, Set Date, Time Format, Date Format, Number Format,
Backlight and Auto Off. Use the
or
soft keys to scroll through the
settings for each option and use the
key to accept settings.
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