Agilent Technologies E364 A Series, Руководство пользователя

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Appendix Service Information
Self-Test Procedures
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606
Rundown gain out of range This test checks the nominal gain between the
integrating ADC and the U121 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 U121 on-chip ADC. The gain test (606) is performed
eight times. Gain noise must be less that ±64 lsb’s of the U121 on-chip ADC.
608 Serial configuration readback failed This test re-sends the last 3 byte serial
configuration data to all the serial path (SERDAT, SERBCK, SERCLK). The
data is then clocked back into U130 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 U138.
624 Unable to sense line frequency This test checks that the LSENCE logic
input U121 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 U121 and U103 through the optically isolated (U108
and U109) 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 U103 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 U121 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.