2Service
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 Count is not incremented.
– If “AT53210A” is NOT the correct security code, the counter will display:
– “Incorrect Security Code - Try Again”
If Lock Cal is displayed, then the counter is already unlocked for calibration, and
the remaining steps are not applicable.
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