Ticket6244 - Adding OPI for 3he fridge system

[rerpha]

Description of work

Adds a device screen for the 3he fridge system on musr.

Ticket

ISISComputingGroup/IBEX#6244

Acceptance criteria

See ticket

Unit tests

None

System tests

None

Documentation

Highlight and provide a link to any additions or changes to the documentation, if applicable. The aim is provide information to help the reviewer

---

Code Review

• Is the code of an acceptable quality?
• Do the changes function as described and is it robust?
• Is there associated PR for the release notes?

Final Steps

• Reviewer has also merged the release notes

[John-Holt-Tessella]

• You need a PV_ROOT set
• Background should be grey not white; if you want the diagram to be white put the white behind the diagram
• All labels should be in sentence case with colons
• Can you run OPI checks (non-strict) and check all errors, e.g. graph error
• Check parent macros has ITC and HELIOX in
• Put a bit of space between the graph and the box so they don't overlap
• Graph heart beats are on heliox not HLX
• Why is there a script on the opi that doesn't seem to do anything
• Are we expecting animation on the picture as valves close and open?

Requests addressed

[JamesKingWork]

Looks good