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.