Chapter 3 Front-Panel Operation and Features
Calibration Overview
65
3
To Change the Security Code To change the security code, you must first
unsecure the power supply, and then enter a new code. Be sure to read the
security code rules on page 62 before attempting to secure the power supply.
• Front-Panel Operation:
To change the security code, first make sure that the power supply is
unsecured. Go to the security code entry, press (
Secure) key after the
“
CAL MODE
” message is displayed, enter the new security code using the
control knob and resolution selection keys, then press (
Secure) key.
Changing the code from the front panel also changes the code as seen from
the remote interface.
• Remote Interface Operation:
CAL:SEC:CODE <new code> Change the security code
To change the security code, first unsecure the power supply using the old
security code. Then, enter the new code as shown below.
‘‘
CAL:SEC:STAT OFF,
‘
003640
’’’
Unsecure with old code
‘‘
CAL:SEC:CODE
‘
ZZ001443
’’’
Enter new code
‘‘
CAL:SEC:STAT ON,
‘
ZZ001443
’’’
Secure with new code
Calibration Count
You can determine the number of times that your power supply has been
calibrated. Your power supply was calibrated before it left the factory. When
you receive your power supply, read the count to determine its initial value.
The calibration count feature can be performed from the remote interface
only.
• The calibration count is stored in non-volatile memory, and does not change
when power has been off or after a remote interface reset.
• The calibration count increments up to a maximum of 32,767 after which it
wraps-around to 0. Since the value increments by one for each calibration
point, a complete calibration will increase the value by 3 counts.
• Remote Interface Operation:
CAL:COUN? Query the number of times of calibration
Secure
Config
I/O
Secure
Config
I/O
