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Keysight E1412A Digital Multimer User Guide
Measurement Speed and Accuracy Trade-offs
General Guidelines for Increasing Measurement Speed
General Guidelines for Increasing Measurement Speed
The following guidelines show how to increase measurement speed, which in
some cases, will reduce the accuracy of the measurement. Some of the
guidelines will not affect accuracy but simply make taking measurements more
efficient. Be aware that these guidelines also increase the complexity of the
program.
–
Avoid function changes.
–
Avoid aperture changes when making frequency or period measurements.
–
Minimize the number of command/response sessions.
–
Set autozero to
ONCE
or
OFF
.
–
Turn autorange
OFF
.
–
Decrease the NPLC setting for DCV, DCI, 2-wire and 4-wire resistance
measurements.
–
Store the readings in the E1412A internal memory instead of sending them
directly to the computer.
Avoid Function Changes
The E1412A Multimeter takes time to switch between the various functions
because the hardware must be re-configured for the new function. Organize your
program so all measurements on a function are done at the same time.
Avoid Aperture Changes
Changing aperture times for frequency or period measurements takes a
significant amount of time. The easiest way to avoid aperture changes is to
directly specify the aperture time. This requires that you not use the
MEASure
command and that you not specify the optional <
resolution
> parameter in a
CONFigure
command.
Minimize the Number of Command/Response Sessions
Minimizing the number of command/response sessions involves programming
the multimeter to pace itself, rather than the computer pacing the multimeter.
Use the external trigger mode when measuring signals routed to the multimeter
from a switch module.
Only items 4, 5 and 6 may reduce the accuracy of a measurement.
The rest of the guidelines involve additional work by the system
programmers.
Summary of Contents for E1412A
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