PEARL: IOC & OPI for Pressure Controller

[kjwoodsISIS]

As a scientist I want to be able to control the PEARL pressure controller, so that I can subject samples to high pressure conditions in my experiments.

Acceptance Criteria

1. Using the IBEX client, I can control the PEARL pressure controller
2. Using genie_python, I can control the PEARL pressure controller

Notes

1. Check the PEARL Instrument wiki.
2. The PEARL pressure controller is an ISIS-designed device. The technical manual is located here: \\isis\shares\ISIS_Experiment_Controls\Manuals\PEARL Pressure Controller\PEARL handbook_v3_5.docx.
3. The IOC & OPI must offer functionality equivalent to the existing VI (located here: C:\LabVIEW Modules\Instruments\PEARL\PEARL Pressure Cell Controller).
4. The PEARL pressure controller is also used by WISH. This ticket must be completed before the end of the long shutdown on TS-2 (i.e. by November 2021), so that WISH can use it.
   • there appear to be 3 pressure controller units
   • it may be that WISH does not use the same physical device as PEARL, but it does need the same IOC & OPI.

[rerpha]

Going to stick this on the WISH board as they regularly use it

[rerpha]

Vi looks like this:

Note: retract actually refers to "reset" which is sent to the device. The time to reach nominal pressure will be done in #6688

[davidkeymer]

Note: retract actually refers to "reset" which is sent to the device.

IIRC "Retract" refers to the physical hydraulic rams. Pressing this button causes the motor(s?) to withdraw them to the end of their travel to reduce the pressure to ~0 bar.

[JackEAllen]

Please See The Following PR's To Review This Issue

• 6040 PEARLPC #636
• Update OPI Screen and OPI Info Record #1355
• 6040 Pearl Pressure Controller #1
• 6040 Support Directory

[rerpha]

Release notes: #6794