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PXI-5610 TempCo Calibration in Cal Exec 3.2
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Bench_Tech
Feb 12, 2008, 4:10:11 AM2/12/08
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Hello,
I am trying to adjust a PXI-5610 that is failing calibration in CalExec 3.2. The problem that I am having is that I keep recieving an error after about an hour (or so) into the TempCo adjustment. I will attach a Word document with the error message. It tells me that the PXI-5610 is not heating up as quickly as it was designed to heat up. I have set the chassis fan to auto to enable the unit to heat up quicker. It did get further (to about 43 degrees Celcius with some change). The only thing that I have not done, and did not want to do without getting some expert advice, is block that chassis air vents. I am not sure if doing so would be an acceptable method to obtain the desired temperature or if the unit just has a bad TempCo component somewhere.
I have an eight slot PXI chassis. In the chassis, I have a MXI card, PXI-5610, PXI-5421, and a PXI-5620.
Any advice on how to obtain the desired TempCo temperatures or possible instrument fault would be greatly appreciated.
Thank you in advance for your assistance and time,
Dustin
I am trying to adjust a PXI-5610 that is failing calibration in CalExec 3.2. The problem that I am having is that I keep recieving an error after about an hour (or so) into the TempCo adjustment. I will attach a Word document with the error message. It tells me that the PXI-5610 is not heating up as quickly as it was designed to heat up. I have set the chassis fan to auto to enable the unit to heat up quicker. It did get further (to about 43 degrees Celcius with some change). The only thing that I have not done, and did not want to do without getting some expert advice, is block that chassis air vents. I am not sure if doing so would be an acceptable method to obtain the desired temperature or if the unit just has a bad TempCo component somewhere.
I have an eight slot PXI chassis. In the chassis, I have a MXI card, PXI-5610, PXI-5421, and a PXI-5620.
Any advice on how to obtain the desired TempCo temperatures or possible instrument fault would be greatly appreciated.
Thank you in advance for your assistance and time,
Dustin
PXI-5610 Document2.doc:
http://forums.ni.com/attachments/ni/270/4967/1/PXI-5610 Document2.doc
Robert F
Feb 13, 2008, 2:40:15 PM2/13/08
to
Hello Dustin,
The Temperature Calibration is thermally compensating for
the changes in gain through hardware temperature change. The compensated gain of the 5610 drifts at a
rate approximately 0.05dB per degrees Celsius.
Make sure that everything is running for at least 30 minutes
before starting the Calibration Executive Procedure. After the verification stage, make sure that
the 5610 is cooled to 23 +/- 5 °C.
Cooling the 5610 might take about an hour.
Chris_164
Aug 6, 2008, 11:40:09 PM8/6/08
to
Hi Bench_Tech.
In our lab, we tried several different attempts at this same adjustment. In the end, the only successful way to get through the Temp Comp adjustment was to modify the PXI chassis. We installed a switch on the outside of the chassis to completely shutdown the fans. You will see the power switch turn from green to red indicated no fan movement. After the temp reaches the necessary 55-56°C and begins the next adjustment section be sure to turn the fans on and let the adjustment process finish.
Good Luck
In our lab, we tried several different attempts at this same adjustment. In the end, the only successful way to get through the Temp Comp adjustment was to modify the PXI chassis. We installed a switch on the outside of the chassis to completely shutdown the fans. You will see the power switch turn from green to red indicated no fan movement. After the temp reaches the necessary 55-56°C and begins the next adjustment section be sure to turn the fans on and let the adjustment process finish.
Good Luck
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