12. Warning messages
The following warning messages may be displayed during the testing process.
Characters which appear in the aux (small) digit field on the display are shown here in a slightly smaller font size.
12.1 Startup warnings
“UNC” -Instrument is un-calibrated
12.2 Battery
“bAt” -Low battery
12.3 Battery charger
“bAt CHA” -Battery charging
“bAt FUL” -Battery fully charged
12.4 Fuse warning
“FUS” -Fuse blown.
12.5 Invalid rotary switch setting
“ERR - - -“ -General error – invalid combination of rotary switches.
12.6 Continuity test
“VOL 0-L” -Voltage overload during test
12.7 Insulation test
“1000 V 1000 V” -Flashing warning before 1 kV test.
“VOL 0-L” -Voltage overload during test
12.8 RCD Test (or GFCI)
“trp” -Supply tripped unexpectedly.
“>50V” -Test aborted due to danger of exceeding touch-voltage limit.
“Err con” -Hardware problem detected during High Current Loop test or RCD test.
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MFT1800 series
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Warning messages
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