XITRON 2000I, Руководство пользователя

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2000I & 2000M User Guide, Rev B
The instrument then performs the internal tests and calibrations
automatically. During these tests and calibrations the display shows the
progress, generating warning messages if any out of tolerance or
malfunctioning circuitry is detected. After completing an internal cal test, the
instrument returns to the output level that was present when the sequence was
initiated.
If any errors are detected during the internal calibration and test sequence, the
instrument displays a warning message:
•
If the error is minor, such as an error not affecting performance, then the
message displays for approximately two seconds and the sequence is
continued.
•
If the error is major, such as an error that seriously affects the
performance then the message continuously displays and the sequence is
suspended at that stage.
External Calibration
The 2000 instruments require periodic calibration (e.g., physical adjustment)
against external
calibration standards to maintain the published
specifications. The period at which these calibrations are performed is
dependant on your accuracy requirements, as shown in the accuracy tables in
Appendix A-Power Output Capacities . Xitron Technologies recommends
calibration intervals of 90 days, 6 months or 1 year to meet your in house
accuracy needs. For example: in some applications, such as, general
engineering laboratories and process control environments, the 1 year
accuracies may be excessive. In these cases a 3-year interval may be
satisfactory.
Equipment Required to Recalibrate
High precision DC voltage measuring equipment is required to accurately
calibrate the 2000 instruments. The objective is an accuracy margin better
than those shown in Tables 2 and 3.