Probe
(Ground To Line/ Probe-HI to
Line/Probe-HI To Probe-LO)
Ranging Mode (AUTO,MANUAL)
For example, if a test with the LLT Offset option enabled is set in the unit, the LS?
command will display the following parameters:
2,LLT,6000,0.0,100.0,0.0,0.5,0.5,0.1,CLOSED,OFF,CLOSED,UL544NP,Ground to
Line,OFF,AC+DC,AUTO,RMS,OFF
This corresponds to:
Step Number,Test Type,Leakage-HI,Leakage-LO,Voltage-HI,Voltage-
LO,Delay,Dwell,LLT Offset,Neutral,Reverse,Ground,Measuring Device,Probe
Configuration,Extended Meters,AC/DC Mode,Ranging Mode,Leakage
Mode,Continuous,Scanner Setting
Another example for the ADD command is shown below. This would be used to add a
line leakage test with the following parameters:
ADD LLT,6000,0.0,100.0,0.0,0.5,0.5,3.6,CLOSED,OFF,CLOSED,UL544NP,Ground to
Line,OFF,AC+DC,AUTO,RMS,OFF,HLOOHHLL
This corresponds to adding an LLT test:
ADD Test Type,Leakage-HI,Leakage-LO,Voltage-HI,Voltage-LO,Delay,Dwell,LLT
Offset,Neutral,Reverse,Ground,Measuring Device,Probe Configuration,Extended
Meters,AC+DC Mode,Ranging Mode,Leakage Mode,Continuous,Scanner Setting
NOTE on using this feature optimally:
The formula applied to this option is only accurate if the phase shift between the “620L
system” and the DUT is 90 degrees. This is because the formula for negating the
inherit leakage current on the 620L system is a vector sum calculation. It should be
noted that the term “620L system” refers to not only the 620L unit but also any other
Associated Research, Inc. safety tester integrated with the 620L unit as well as any
fixtures the end user may include to the system. Other instruments and fixtures will
introduce extra capacitance and resistance to the network and will change the
relationship of the phase angle between the 620L system and the DUT.
To Next Page
