Keysight Technologies 53210A, Руководство по обслуживанию

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2 Service
116 Keysight 53210A/53220A/53230A Assembly Level Service Guide
To unlock the counter for calibration:
1 Press the Utility key, and then press the Cal/AutoCal softkey.
Unlock for calibration:
1 If Unlock Cal is displayed, use the counter front panel knob and the appropriate
left/right arrow keys to enter a valid security code into the data entry field on
the display (see Figure 2-1 and Figure 2-2 ).
– For example, if AT53210A was the security code set at the factory
(for a 53210A Counter), then enter AT53210A into the data entry field. The code
will repeat in the Secure Code line in the Calibrate Information screen.
2 Press the Unlock Cal softkey to complete the data entry.
– If the code is valid, the Unlock Cal annunciator changes to Lock Cal to show the
data was accepted and the counter is now unlocked for calibration.
– The
Cal Coun t is not incremented.
– If “AT53210A” is NOT the correct security code, the counter will display:
– “Incorrect Security Code - Try Again”
NOTE
If Lock Cal is displayed, then the counter is already unlocked for calibration, and
the remaining steps are not applicable.