NI PXI-4070 Calibration Procedure
6
ni.com
•
Maintain an ambient relative humidity of less than 60%.
•
Allow the calibrator to settle fully before taking any measurements.
Consult the Fluke 5700A/5720A user documentation for instructions.
•
Allow the thermal EMF enough time to stabilize when you change
connections to the calibrator or the NI 4070. The suggested time
periods are stated where necessary throughout this document.
•
Keep a shorting bar connected between the V GUARD and
GROUND binding posts of the calibrator at all times.
•
Clean any oxidation from the spade lugs on the calibration cable
assembly before connecting them to the calibrator’s binding posts.
Oxidation is a discoloration that tarnishes the copper spade lugs so that
they appear dull rather than shiny.
•
Leave the spade lugs on the calibration cable assembly that are labeled
SHD
connected to the calibrator’s V GUARD binding post at all times.
•
Prevent the cables from moving or vibrating by taping or strapping
them to a nonvibrating surface. Movement or vibration causes
triboelectric effects that can result in measurement errors.
Documentation
In addition to this calibration document, you may find the following
references helpful in writing your calibration utility:
•
NI Digital Multimeters Help
•
NI-DMM Instrument Driver Quick Reference Guide
•
NI Digital Multimeters Getting Started Guide
•
Specifications for the NI PXI-4070
All of these documents are installed on your computer when you install
NI-DMM. To locate them, go to
Start»Programs»National Instruments»
NI-DMM»Documentation
.
If you are performing the optional frequency verification procedure,
you may need the following documents, which are available at
ni.com/
manuals
:
•
TB-2715 Terminal Block Installation Guide
•
About Your NI 6608 Device
Software
The NI 4070 calibration procedure requires that NI-DMM version 2.1 or
later be installed on the calibration system. NI-DMM supports a number of
programming languages including LabVIEW, LabWindows
™
/CVI
™
,
Microsoft Visual C++, and Microsoft Visual Basic. When you install
