HP 34401A, User Manual

Page: 66 / 236

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Remote Interface Operation : You can use the following commands to
make min-max measurements.
CALCulate:FUNCtion AVERage
CALCulate:STATe {OFF|ON}
CALCulate:AVERage:MINimum?
read the minimum value
CALCulate:AVERage:MAXimum?
read the maximum value
CALCulate:AVERage:AVERage?
read the average of all readings
CALCulate:AVERage:COUNt?
read the count
A new command is available starting with firmware Revision 2 which
allows you to take readings using
INITiate
without storing them in
internal memory. This command may be useful with the min-max
operation since it allows you to determine the average of a series of
readings without storing the individual values.
DATA:FEED RDG_STORE, ""
do not store readings
DATA:FEED RDG_STORE, "CALCulate"
store readings (default)
See page 126 for more information on using the
DATA:FEED
command.
Null (Relative) Operation
When making null measurements, also called relative , each reading
is the difference between a stored null value and the input signal.
One possible application is in making more accurate two-wire ohms
measurements by nulling the test lead resistance.
Result = reading – null value
Applies to all measurement functions, except continuity, diode, and ratio.
•
The null value is adjustable and you can set it to any value between
0 and
±
120% of the highest range, for the present function.
•
The null value is stored in volatile memory; the value is cleared
when power has been off, after a remote interface reset, or after a
function change.
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Chapter 3 Features and Functions
Math Operations
65