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Chapter 3 Front-Panel Operation and Features
Calibration Overview
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3
Calibration Overview
This section gives an overview of the calibration features of the power supply. For
more detailed discussion of the calibration procedures, see the
Service Information .
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.
• The table 3-1 below 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 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.
_ _ _ _ _ _ _ _ _ _ _ (11 characters)
• When you secure the power supply from the remote interface, use maximum 8
alphanumeric characters to unsecure the power supply from the front panel also.
For example,
e3646A
(less than 9 characters)
Table 3-1. Factory setting security codes
If you forget your security code, you can disable the security feature by adding a
jumper inside the power supply, and then entering a new code. See the Service
Information for more information.
Model Security Code Model Security Code
E3646A 003646 E3647A 003647
E3648A 003648 E3649A 003649