7 Performance Tests and Calibration
To unsecure the instrument without the security code
To unsecure the instrument without the correct security code, follow the steps below.
N O T E | If you do not have a record of the security code, you can try 1234 (the fac- | |||
| tory default code) using the front panel. | |||
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| 1 | Record the last 4 digits of the multimeter’s serial number. | ||
| 2 | Turn the rotary switch to | . | |
| 3 | Press | and | simultaneously to enter the |
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| Calibration Security Code entry mode. | ||
| 4 | The primary display shows 5555 and the secondary | ||
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| display shows SECUr. |
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| 5 | Press | for more than 1 second to enter the Set | |
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| Default Security Code mode. The secondary display shows | ||
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| SEr.no and the primary display shows 5555. | ||
6Use the editing keys character in the code.
and
to step each
Use 
and
to select each character.
7Set the code, same as the last 4 digits of the instrument’s serial number.
8Press 
(Save) to confirm the entry.
9If the 4 digits entered are correct, the secondary display will show PASS.
130 | Agilent U1251A/U1252A User’s and Service Guide |
