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ERROR MESSAGES
Table 1. Error Messages
Message
Description
NO DEFLTS
Checksum error in default condi-
tion during power-up.
UNCAL
Checksum error in calibration
during power-up
ROM ERROR
Failed ROM self-test.
RAM ERROR
Failed RAM self-test.
TRG OVERUN
Trigger overrun; instrument trig-
gered while still processing a pre-
vious trigger.
CAL VALUE
Calibration value conflicts with
the currently selected range.
CAL ERROR
Calibration value not within allow-
able limits.
CAL LOCK
Sent calibration command with
calibration switch (CAL LOCK)
disabled.
CAL ZCHK
Cannot calibrate picoammeter
with zero check enabled.
INTERLOCK
Tried to put V-Source of Model
487 in operate while an enabled
safety interlock switch is open.
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