Operation and Features 2
E364xA User’s and Service Guide 85
Calibration
This section gives an overview of the calibration features of the power supply. For
more detailed discussion of the calibration procedures, refer to Chapter 8,
"Service and Maintenance".
Calibration security
This feature allows you to enter a security code to prevent accidental or
unauthorized calibrations of the power supply. When you first receive your power
supply, it is secured. Before you can calibrate the power supply, you must
unsecure it by entering the correct security code.
– Table 2-1 shows the security code for each model when the power supply is
shipped from the factory. The security code is stored in non- volatile memory,
and does not change when power has been turned off or after a power- on
reset (*RST command).
– The security code may contain up to 11 alphanumeric characters or
underscore character (‘‘_’’). A letter (A- Z) or number (0- 9) can be used for the
first character. You do not have to use all 11 characters.
– When you secure the power supply from the remote interface, use a maximum
of eight alphanumeric characters to unsecure the power supply from the front
panel also. For example, the security code for E3646A has less than nine
characters.
_ _ _ _ _ _ _ _ _ _ _ (11 characters)
If you forget your security code, you can disable the security feature by adding a
jumper inside the power supply and then enter a new code. Refer to Chapter 8,
"Service and Maintenance" for more information.
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