Fluke PM6690 - Limits; Limit Behavior

Even higher versatility can be exploited with a
controller and the optional TimeView™Fre
-
quency and Time Analyzing Software Pack
-
age.
Limits
The Limits Mode makes the counter an effi
-
cient alarm condition monitor with high flexi
-
bility as to the report possibilities.
Press MATH/LIM ® Limits to enter the first
Limits Menu. See below.
You can set two levels by entering the
submenus named Lower Limit resp. Upper
Limit. Any numerical value can be entered us-
ing scientific notation. The active keys are the
digits 0-9, the decimal point, the change sign
(±) and the softkey designated EE for toggling
between the mantissa and the exponent.
Typos are erased by pressing the left arrow
key. Confirm by pressing ENTER.
Limit Behavior
Press Limit Behavior to set how the counter
will react on limit crossings. The following
choices exist:
•
Off
No action taken. LIM indicator is OFF.
In all other behavior modes, the
LIM in
-
dicator is ON and non-flashing, unless
the limits set in the
Limit Mode menu
have been crossed.
•
Capture
The measurements are compared with
the limits set under
Lower Limit and
Upper Limit, and the LIM symbol will
be flashing when the active
Limit Mode has set the LIM flag.
Only samples meeting the test criterion
will be part of the population in statistics
presentations.
•
Alarm
The measurements are compared with
the limits set under
Lower Limit and
Upper Limit, and the LIM symbol will
be flashing when the active
Limit Mode has set the LIM flag.
All samples, i.e. also those outside the
limits, will be part of the population in
statistics presentations.
•
Alarm_stop
The measurements are compared with
the limits set under
Lower Limit and
Upper Limit, and the LIM symbol will
be flashing when the active
Limit Mode has set the LIM flag.
The measurement process will stop,
and the value that caused the limit de-
tector to trigger can be read on the dis
-
play.
Only samples taken before the alarm
condition will be part of the population in
statistics presentations.
The alarm conditions can also be detected via
the SRQ function on the GPIB. See the Pro
-
gramming Manual.
Process
6-6 Limits
Fig. 6-2 The Limit Menu, level 1