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This topic contains information for calibrating the National Instruments 6601/6602/6608 using Calibration Executive.
Calibration Executive Procedure Features:
|Adjustment||Manual Mode||Selectable Test Points
Approximate Test Time: (NI 6601/6602) 1 minute, (NI 6608) 95 minutes
The following table lists the test equipment required to calibrate NI 6601/6602/6608 devices.
|Highly Stable 10 MHz Clock Source||—||Make sure the clock source outputs a 10 MHz TTL square wave. For the 6601/6602 use a clock source that is accurate to within one ppm. For the NI 6608 use a clock source that is accurate to within 0.75 ppb.|
|Use with PXI modules.|
|DAQ Accessory||NI SCB-68||Shielded I/O connector block with 68 screw terminals for easy signal connection to 68- or 100-pin DAQ devices.|
|Shielded DAQ Cable||NI Sh68-68-D1||You must use this cable for calibrating NI 660x devices.|
|CompactPCI-to-PCI Adapter||–||You must use this adapter in a PCI chassis to verify the onboard oscillator on the NI PXI-6602. If you verify the NI PXI-6602 in a PXI chassis, the measured frequency is that of the PXI backplane clock instead of the onboard oscillator.|
The following setup and environmental conditions are required to ensure the NI 6601/6602/6608 meets published specifications.
|Note If the NI 6601/6602/6608 fails after calibration, refer to the Troubleshooting Guidelines. If the NI 6608 fails after troubleshooting, return it to NI for repair or replacement. NI 6601/6602 devices that fail verification cannot be adjusted and must be returned to National Instruments for repair or replacement.|
Use the following troubleshooting guidelines if the NI 6601/6602/6608 device fails after running the calibration procedure:
An increasing Counter value indicates that the device is connected properly. A counter value that does not change indicates that the signal is not connected or is not working.