Documentation - National Instruments PXI-4070 Manual

Documentation

NI PXI-4070 Calibration Procedure
• Power on and warm up both the calibrator and the NI 4070 for at least
30 minutes before beginning this calibration procedure.
• Maintain an ambient temperature of 23 ±1 °C.
• 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.
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, select 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
:
manuals
• TB-2715 Terminal Block Installation Guide
• About Your NI 6608 Device
6
ni.com/
ni.com