NI PXI-4110 Calibration Procedure
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© National Instruments
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Considerations
The figure below represents the general flow of an application used to adjust a range on a single
channel of the NI 4110.
Figure 8.
LabVIEW Block Diagram Illustrating Adjustment on the NI 4110
1.
Initialize external calibration session
:
To adjust the NI 4110, call the niDCPower
Initialize External Calibration VI (
niDCPower_InitExtCal
function) to initiate a
special type of NI-DCPower session. The default calibration password is
NI
.
2.
Configure the instrument
: Call a series of standard NI-DCPower VIs/functions specific
to the adjustment of a particular range. These calls vary depending on the requirements of
the range being adjusted. Typical operations in this step include configuring ranges, setting
output levels, or taking measurements. Measurements made by external equipment
required for adjustment also occur during this step. For more information about configuring
the NI 4110 for a particular output or measurement mode, refer to the example programs
installed with NI-DCPower.
3.
Call niDCPower Cal Adjust function(s)
: When the measurements required for
adjustment of a range are complete, call one of the niDCPower Cal Adjust VIs or functions
to calculate new calibration coefficients and store them in memory on the host. Calling
these VIs/functions does
not
commit the new coefficients to hardware.
4.
Close session and commit new calibration coefficients
: To complete adjustment of the
range, call the niDCPower Close External Calibration VI (
niDCPower_CloseExtCal
function) to close the session. To write new calibration coefficients to the hardware, specify
an action of
Commit
. At this time, the calibration date and temperature stored onboard are
also updated.
Note
You can adjust any voltage or current range individually by opening a
calibration session, adjusting, and then closing the session with an action of
Commit
.
To adjust all voltage and current ranges simultaneously, open a single calibration
session, execute multiple adjustment steps, and then close the session with an action
of
Commit
to write coefficients for multiple ranges simultaneously.
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