Agilent Technologies Portable Generator Agilent Technologies Portable Generator User Manual

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of 136
 
Chapter 5 Service
Self-Test Procedures
105
5
606
Rundown gain out of range This test checks the nominal gain between the
integrating ADC and the U19 on-chip ADC. The nominal gain is checked to
±10% tolerance.
607
Rundown too noisy This test checks the gain repeatability between the
integrating ADC and the U19 on-chip ADC. The gain test (606) is performed
eight times. Gain noise must be less that ±64 lsb’s of the U19 on-chip ADC.
608
Serial configuration readback failed Th is test r e- se nd s th e la st 3 by te ser ia l
configuration data to all the serial path (SERDAT, SERBCK, SERCLK). The
data is then clocked back into U20 and compared against the original 3 bytes
sent. A failure occurs if the data do not match. This tests checks the serial data
path through U23.
624
Unable to sense line frequency This test checks that the LSENCE logic
input U19 is toggling. If no logic input detected, the power supply will assume
a 50 Hz line operation for all future measurements.
625
I/O processor did not respond This test checks that communications can
be established between U19 and U1 through the optically isolated (U2 and U5)
serial data link. Failure to establish communication in either direction will
generate an error. If this condition is detected at power-on self-test, the power
supply will beep and the error annunciator will be on.
626
I/O processor failed self-test This test causes the earth referenced
processor U1 to execute an internal, ram test. Failure will generate an error.
630
Fan test failed This test checks if the fan current is flowing. If the current
is not detected at power-on self-test, the power supply will beep and the error
annunciator will be on. Fan test fail could likely induce overtemperature
condition in the power supply.
631
System DAC test failed This test checks if the DAC hardware is functional.
The main controller U19 sends a reference voltage data to DAC and converts
the DAC output to digital data to see if the digital data is within a valid range.
632
Hardware test failed This test checks the status of voltage and current error
amplifiers for the power circuit. If both amplifiers are not operational, the
power supply will beep and the error annunciator will be on.

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