Chapter 3 Calibration Procedures
Calibration Count
64
Calibration Count
The calibration count fea ture provides an independent ‘‘se rializa tion’’ of your
calibration s. You can determi ne the number of times that yo ur power supp ly
has been calibrated. By monitori ng the cal i bration count, you can determ i ne
whether an unauthorized calibration has been performed. Since the value
increm ents by one for each calibration parameter (see Table 3-2 on the next
page), a complete calibration increases the value by 5 counts.
• The calibration count is stored in
non-volatile
memory and does not change
when power has been off or after a remote interface reset. Your power
supply was calibrated before it left the factory. When you receive the power
supply, read the calibration count to determine its value.
• The calibration count incre ments up to a maximum of 32,767 afte r which it
wraps around to 0. No way is provided to program or reset the calibration
count.
Calibration Message
You can use the calibration message feature t o record calibration inf ormation
about your power supply . For example, you can store such information as the
last calibration date, the next calibration due date, the power supply’s serial
number, or even the name and phone number of the person to contact for a
new calibration.
You can re cor d and re ad inform a tion in the cal ibr ation m es sage from the
rem ote inte rfac e only.
• The calibration mes sage may contain up to 40 characters.
• The calibration mes sage is stored in
non-volatile
me mory and does not
change when power has been off or after a remote interface reset.
• Rem ote Interface Operation
CAL:SEC:STAT {OFF|ON},
<code>
Sec ure or unsecure the power supply
CAL:SEC:CODE
<new code> C han ge the se cu rity c ode
CAL:STR
<quoted string> Store the calibr ation m es sage
CAL:STR?
Qu ery the cal ibr ation inform a tion
See “
Calibration Overview
”, starting on page 68 in chapter 3 of the
User’s
Guide
for more details.
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