Arbiter Systems 928A User Manual page 66

USER Profile Definitions
Signal: Select either V for voltage, or I for current.
Logic: Compares Signal (X) to Limit: select either
X LIMIT, or X LIMIT.
Limit: Logically compares the signal to this value:
select any floating point number up to 1,000,000.
HYS: Hysteresis: adds to the Limit value ( ) to
reduce unnecessary events; select any floating point
number up to 1,000,000.
Dwell: Number of half cycles while while Logic is
true before trigger becomes Active; select any integer
number up to 65535.
Tips on PQ Triggering
Here are some situations where you might not see any
recorded events even though the measured parameter
meets the required "Limit" conditions.
1. The parameter already meets the limiting con-
dition when setting the trigger; it needs a tran-
sition from LO to HI or HI to LO before trigger
becomes Active.
2. The parameter did not meet the dwell condition.
3. The parameter met the original limit conditions,
however fell outside the sliding reference time
constant (see IEC61000-4-30, par. 5.4.4.).
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