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| *[[Wiring Notes]] | | *[[Wiring Notes]] |
| | | *[[Python Control Software]] |
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| He return feed | | He return feed |
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| == Python Control Software ==
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| ===SetupCryostat()===
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| in robot.py
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| ''Set up Oxford ITC503 Cryostat to default parameters''
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| def SetupCryostat(sensor=2, tries=5)
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| sensor: sensor # to control against: 1=gas inlet; 2=cold block (default); 3=spare
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| tries: number of repeats to try when sending the command before giving up (default is 5)
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| ===GetCryostatT()===
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| in robot.py
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| ''Read Oxford ITC503 cryostat temperatures''
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| def GetCryostatT(tries=5)
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| input: number of times to attempt read (defaults to 5)
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| returns a list of 3 temperatures: sensor1, sensor2, sensor3
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| ===SetCryostatT()===
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| in robot.py
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| ''Set Oxford ITC503 setpoint and optionally hold for temperature''
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| def SetCryostatT(setpoint, WaitFlag=True, Delay=5, MaxWait=120, DeltaT=2, tries=5):
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| setpoint (K) -- desired end T
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| WaitFlag (default=True) -- if True the routine will return once the temperature is reached (default),
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| False means return immediately after setting the ramp to begin
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| Delay (min) -- period of time to wait after initially reaching the desired temperature in min (default is 5)
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| MaxWait (min) -- maximum period to wait for the selected sensor to reach the Set Point in min.
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| If this period expires, an exception is thrown (defaults to 120)
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| DeltaT (K) -- allowed discrepancy between the selected sensor and the desired T to start the delay period (defaults to 2)
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| tries -- number of repeats to try when sending the command before giving up (defaults to 5)
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| ===SweepCryostatT()===
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| in robot.py
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| ''Sets Oxford ITC503 setpoint and optionally hold for temperature''
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| def SweepCryostatT(startpoint, endpoint, sweeptime, WaitFlag=False, MaxWait=1.25, tries=5):
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| startpoint (K) -- desired start T for Temp
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| endpoint (K) -- desired end T
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| sweeptime (min) -- desired time for change from startpoint to endpoint (minutes)
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| WaitFlag (default=False) -- if True the routine will return once the temperature is reached,
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| False means return immediately after setting the ramp to begin (default)
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| MaxWait (ratio) -- maximum period to wait for the sweep to complete as a ratio of the sweep time.
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| Default is 1.25, meaning to wait 125% of sweeptime,
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| If this period expires, an exception is thrown.
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| tries -- number of repeats to try when sending the command before giving up (defaults to 5)
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| ===Example Code===
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| s11bmwork% /APSshare/bin/python
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| Python 2.5.2 (r252:60911, Jan 28 2009, 15:33:22)
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| [GCC 4.1.2 20070626 (Red Hat 4.1.2-13)] on linux2
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| Type "help", "copyright", "credits" or "license" for more information.
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| >>> import sys
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| >>> sys.path.append('/local/11BMcontrol/MailIn')
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| >>> import robot
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| >>> robot.GetCryostatT()
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| (1.3999999999999999, 407.80000000000001, 273.39999999999998)
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| >>>
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| >>> robot.gui.Sleep(1)
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| >>> robot.SweepCryostatT(1,2,1)
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| False
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| True
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| False
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| >>> robot.SweepCryostatT(1,2,1,WaitFlag=True)
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| True
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| False
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| >>>
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User Instructions
notes
Manuals
On the Internal 11BM Staff staff SVN repository here:
https://subversion.xor.aps.anl.gov/11BMweb/Internal/trunk/staffdocuments/OxfordOptistatCF_HeliumCryostat_Documents/
More Details
ordering Liquid Helium
call Mary Berryman (FMS) on 2-3440 by 11 AM the day before to order Helium for next day delivery
normally order 100 L dewer
leave a message if no answer; give name, full cost code, badge number, delivery location (433)
factory default PID info
Transfer Line
On Cryostat - Inner Dimensions (receptacle on the cryostat)
<------- 38 cm ------->
<- 25 cm ->
<- 13 cm -->
///
===========
===========
===========
===========
===========
===========
\\\
Transfer Line Stick Dimensions (when compression fitting correctly positioned)
<----- 36 cm ----->
<8 cm > <8 cm >
///
=======
=======
||====
======= ^
======= ^ |
\\\ | |
He return feed
Drawings
Oxford_HeliumCryostat_CF1208_drawings.pdf
