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MTA Instrumentaion

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All hardware can communicate with ... as a user interface between the PC and the hardware. ... GPIB, Serial, UDP, TCP/IP, ect. 9/19/09. 10. Labview ... – PowerPoint PPT presentation

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Title: MTA Instrumentaion


1
MTA Instrumentaion
  • University of Illinois (UIUC)
  • Debbie Errede
  • Mike Haney
  • Zack Conway
  • Fermilab
  • Robert Goodwin
  • Mike Kucera
  • Mike Shea
  • Feb 22, 2003

2
Whats Going On?
  • Instrumentation
  • Hardware
  • Data Collection
  • Data Processing
  • Measurements

3
Hardware
  • In Urbana we have
  • FISO bus system.
  • Fiber optic light conditioner.
  • LakeShore 218 temperature monitor.
  • Diode/resistive temperature sensor monitor.
  • IRM(Internet Rack Monitor)
  • Fancy ADC connected to the Fermilab Ethernet.
  • Fast ADC with 8 differential channels
  • PC card.

4
FISO BUS SYSTEMPart 1
  • Currently we have 4 signal conditioners.
  • Can take data at 1kHz.
  • Room for 8 total(4 more) signal conditioners.
  • We have temperature, pressure, and strain gauges.
  • Each signal conditioner can illuminate a separate
    sensor.

5
FISO BUS SYSTEMPart 2
  • Gauges are not certified below 250K.
  • The gauges have been used to 35K but never
    below(H. Kirk _at_ Brookhaven).
  • Working with FISO technologies Inc. to modify the
    internal calibration curves.
  • By mid-March we will be able to simulate many
    aspects of the LH2 absorber in Urbana for sensor
    testing.

6
LakeShore 218 Temperature Monitor
  • 8 channel temperature monitor.
  • Supports two sets of 4 channels.
  • Each set of channels can be calibrated for either
    diode or resistive temperature sensors.
  • 1.4K-325K temperature range for each channel.
  • Temperature resolution of 10mK at 20K in a rad
    free environment.
  • Maximum data collection rate on all channels in
    16 Hz.

7
IRM(Internet Rack Monitor)
  • IRM comes with
  • 64 differential A-D input channels.
  • 8 bytes of digital I/O channels.
  • 8 bytes of D-A output channels.
  • Ethernet LAN interface.

8
PCI-MIO-16E-1 ADC
  • 16 channel ADC(8 differential channels)
  • 12 bits per channel
  • 1.25 Msamples/s
  • Each ADC channel built into an IRM has a maximum
    operating rate of 100 ksamples/s.
  • Internal PC device.

9
Data Collection
  • All hardware can communicate with external
    devices.
  • The process repeats itself at regular
    intervals(15Hz???).
  • Using Labview as a user interface between the PC
    and the hardware.
  • Labview comes with built in functions supporting
    hardware communication
  • GPIB, Serial, UDP, TCP/IP, ect.

10
Labview
  • Very modular
  • Each instrument has its own independent code.
  • Labview can run each instruments code
    concurrently.
  • Labview code is very easy to understand.

11
Collection Control
  • At this time
  • One master configuration file.
  • All of the data will be saved to the PCs hard
    drive.
  • There are size issues when writing to the IRM.
  • 1kB every 66 milliseconds is the current goal.
  • What should be posted on the IRM?

12
IRM Data Collection
  • Operates repetitively at a constant rate.
  • In Urbana we are running at 12.5Hz.
  • Can definitely handle 15Hz operation.
  • Faster???
  • Each cycle includes
  • The revision of the analog and binary data
    tables.
  • Answering/generating messages for other IRMs,
    ACNET, our PC, ect.

13
IRMPart 2
  • University of Illinois IRM
  • Has room for 1000 virtual channels.
  • Can be upgraded to 2000 virtual channels.
  • All channels are ACNET compatible.
  • 2MB of free memory.
  • Not as structured as the channel data.

14
Data Processing
  • The PC can handle almost any data type sent to it
    at high rates.
  • The IRM
  • Refresh rate of data is limited.
  • Amount of data refreshed per cycle is limited.
  • Data must be formatted.
  • Each reading occupies 2 bytes of memory.
  • This leaves 65535 steps to record each data point.

15
IRM Data Processing
  • Take an ammeter.
  • Lets say it needs to measure a current from 0 to
    200mA.
  • So the maximum resolution the IRM data can have
    is
  • 200mA/655350.0031mA
  • In other words
  • IRM Reading (1/0.0031mA)Current Hardware value.

16
Hardware Data
  • All sensor readings use different units.
  • Each sensor requires its own calibration curve.
  • The current plan
  • Save the non-calibrated data to disk.
  • Post the adjusted data for ACNET.

17
Wrap up
  • U of I _at_ Urbana-Champaign is focusing on the data
    collection and hardware for the LH2 absorber.
  • The hardware works but sensor calibration remains
    a high priority.
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