DAQ for Pressure Test,
and later...
Michael J. Haney
University of Illinois
m-haney@uiuc.edu
15 March 2001
Absorber Review Meeting at NIU
1
In Hand at UofI
• 1 GHz PC, 512M RAM, 20G disk
• Labview, NI-DAQ
• 3 National Instruments PCI-MIO-16E-1
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–
–
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1.25 MS/s, 12 bit ADC
16 SE / 8 Diff analog input channels
100mV - 10V (FS) programmable gain range
 11V max CM;  25V OVP (on)
15 March 2001
Absorber Review Meeting at NIU
2
Enroute to UofI
• National Instruments PCI-GPIB
– and cables for 3 peripherals
• GPIB software
• Labview .VI’s (work in progress)
– multichannel logger
– file reader
15 March 2001
Absorber Review Meeting at NIU
3
Enroute (elsewhere) ?
• Keithley 220 current source
• Keithley 7001 switch
• Keithley 2001 multimeter
– all are GPIB peripherals
15 March 2001
Absorber Review Meeting at NIU
4
DAQ Plan for Pressure Test
• every millisecond
– read (up to) 24 stain gauges
– via PCI-MIO-16E-1 boards
– common-mode permitting...
• every second
– read strain gauges, pressure, flow
– all (40) channels
– via Multimeter/GPIB
15 March 2001
Absorber Review Meeting at NIU
5
DAQ Plan for Pressure Test
(continued)
• Spool everything to a file
– 10 GB / (24 * 12 bits * 1 KHz)
= 77 hours
– “start” and “stop” are moot...
• Analyze later
– find quasi-static measurements between fills
– look for vibrations
– examine rupture
15 March 2001
Absorber Review Meeting at NIU
6