Chapter 3 Front-Panel Operation and Features
Calibration Overview
64
To Secure Against Calibration
You can secure the power supply against calibration either from the front panel
or over the remote interface. The power supply is secured when shipped from
the factory.
Be sure to read the security code rules on page 62 before attempting to secure
the power supply.
• Front-Panel Operation:
1 Select the calibration mode.
If the power supply is unsecured, the above message is displayed as you turn
on the power supply by holding down (
Calibrate) key and hold down the
key until you hear a long beep. And a message ‘‘
CAL MODE
’’ is displayed.
2 Enter the security code.
Enter the desired security code using the control knob and resolution selection
keys.
3 Save the change and exit the menu.
The secured setting is stored in non-volatile memory, and does not change
when power has been off or after a power-on reset (
*RST
command).
• Remote Interface Operation:
CAL:SEC:STAT {OFF|ON},<code> Secure or unsecure the power supply
To secure the power supply, send the above command with the same code
as used to unsecure. For example,
‘‘
CAL:SEC:STAT ON,
‘
003640
’’’
(E3640A model)
UNSECURED
000000
secured
Power
Calibrate
View
Calibrate
View
Secure
Config
I/O
Secure
Config
I/O
Power
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