Extech Instruments 7470 Operation Manual page 54

MXX HI-Limit
XX.XX KV
If the DUT current is well beyond the metering range of AC Withstand Voltage test the
instrument assumes that the failure is due to a short circuit, the display will show:
MXX Short
- - . - - KV
If the DUT current is well beyond the metering range of AC Withstand Voltage test and
an Arcing condition beyond the Arc Sense limit is indicated, the display will show:
MXX Breakdown
XXX.X s
XX.XX KV
If the DUT current falls below the LO-Limit of AC Withstand Voltage test, the display will
show:
MXX LO-limit
XX.XX KV
If the DUT current is within the metering range of the AC Withstand Voltage test and an
Arcing current exceeds the Arc-Sense limit and the Arc function is set to ON, then an
Arc failure has occurred and the display will show:
MXX Arc-Fail
XX.XX KV
If a Ramp-DOWN time has been set and the dwell portion of the test is complete the
display will show:
MXX Ramp-DOWN XXX.X s
XX.XX KV
If the DUT has passed the AC Withstand Voltage test and the test process is complete
the display will show:
MXX Pass
XX.XX KV
50
XXX.X s
 10 mA
XXX.X s
 10 mA
 10 mA
XXX.X s
XX.XX mA
XXX.X s
XX.XX mA
XX.XX mA
XXX.X s
XX.XX mA