Bitronics QTWIE2, Руководство пользователя

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ML0030 August 2009 Copyright 2009 Bitronics, LLC
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TABLE I - SELF TEST RESULT SUMMARY FOR 3-PHASE WATT/VAR METER (continued)
Fault
6. Input Over-Range
7. Program memory error
8. Analog-to-Digital
converter (ADC) self-test
error
Fault Indication
Top display alternately
displays reading and fault
code 4 (--4).
Top display indicates fault
code 5 (--5) then executes
power-up display
sequence.
Top display alternately
displays 3 dashes (---) and
fault code 6 (--6), other
displays show 3 dashes
(---).
Effects of Fault
Peak input quantity exceeds the range of
the instrument. Both display and
transducer output accuracy reduced by an
amount depending upon the degree of
over-range.
The microcontroller has detected a fault in
program memory and is attempting to
restart itself. Microcontroller will force
transducer outputs to >2ma (0-1ma out) or
2ma (4-20ma out).
Instrument cannot read any signals.
Microcontroller will force transducer outputs
to >2ma (0-1ma out) or 2ma (4-20ma out).
Corrective Action
Verify input signals are within
range. If within range, replace
analog processing board or the
electronics module.
Replace microcontroller board
or electronics module.
Replace analog processing
board or the electronics module.