Service 2
Keysight 53210A/53220A/53230A Assembly Level Service Guide 117
To change to a new security code
1 Unlock the counter by using the procedure described in the previous section
titled “To Unlock The Counter For Calibration”.
2 Enter a new security code and then press the Lock Cal softkey.
– The data entry area and Secure Code areas change to all dash ( -- ) characters
when the code is accepted.
–The Cal Count is incremented and the Lock Cal softkey changes to the Unlock Cal
softkey.
IMPORTANT! Be sure to write down the new calibration security code you
enter before you lock the counter. Once the counter is locked, there is no
way on the counter to tell what the code is. However, there is a procedure
that can be used to reset the secure code to null so that a new code can be
entered. Refer to “Resetting the security code to a null” on page 151 .
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