QT system

Frequency	Task
Daily	Check HR3 oil level Check P40 and P41 pressure gauges (if the pressure difference is > ~60 psi, then you will have to arrange to clean the purifier) Check the LCW flow into the cold-head compressors for the past 12 hrs. If there is an unusual behavior please notify about it on the discord. Check LCW temperatures from the cold-head compressor outlets for the past 12 hrs. If there is an unusual behavior please notify about it on the discord. Kaeser compressor run-mode. The small screen on the Keaser should show a "solid" arrow if it is running with the "LOAD" mode which is what we want. If this arrow is "hollow", then follow the steps on HR3 Manual to get Kaeser Compressor continuously running on the LOAD mode.
Weekly	F1, F2 filters on HR3. See → Cleaning the filters F1, F2 at HR3 for the steps Check MV101 filter on top of the HR3. For cleaning, follow → Cleaning the filter at MV101

Target Expert/Helper/Trainee needs to update this spreadsheet:
https://docs.google.com/spreadsheets/d/1k836pi3-3F1O7qrVbh-RQXJcwsCeYpV61wKufTBvMig

Maintenance job	Frequency	Notes
Check the oi level	Daily	must be between the middle and top edge of the oil level

glas

glass
Check the oil condition	Daily	normally the oil is clear and transparent
Oil change	every 2000 h or 6 months
Oil filter	At each oil change
Exhaust filter (qty 8)	Annually	Or if oil mist at exhaust
Clean the dirt trap	Monthly
Check the anti-suckback valve	Annually
Clean oil cooler	Annually
Clean filter of gasballast	Monthly
Checking the float valve	When changing the exhaust filterts
Replacing the exhaust valves	*
Replacing the pump module	*
Disassembling and reassemblig the pump module	*
Control belts	6 months




Oil capacity min/max 21/24 qt
suitable oil: LVO 130	https://www.leyboldproducts.us/products/oils-greases-lubricants/mineral-oil-leybonol/380/leybonol-lvo-130?number=
Exhaust filter part number: 9 714 31 120	https://www.leyboldproducts.us/products/oil-sealed-vacuum-pumps/sogevac/sogevac-b/spare-parts/1156/exhaust-filter-cartridge-br/sogevac-sv-300-b/sv-630-b/sv-750-b
Oil filter	https://www.leyboldproducts.us/products/oil-sealed-vacuum-pumps/sogevac/sogevac-b/spare-parts/1158/oil-filter-br/sogevac-sv-470-b/bf-sv-500-b-sv-570-b/bf-sv-630-sv-630-b/bf-sv-750-b/bf

Item	Description	Last Maintenance completion date	P (Torr)	elog info (# or link)
U-tube
LHe transfer line (port in the cave)
LHe transfer line (port below magnet bypass)
LHe transfer line (port close to magnet-bleeder valve)
LHe transfer line (port near QT manifold: where lines from A,B,C unite to 1 line)
LHe transfer line to Dewar A
LHe transfer line to Dewar B
LHe transfer line to Dewar C
Dewar A vacuum
Dewar B vacuum
Cold box A vacuum
Cold box B vacuum
Purifier vacuum

Start date	Finish date	Initial Pressure difference between P40 and P41	Pump-purge cycles	Final Pressure difference between P40 and P41	elog info (# or link) info

Date	Description (Kaeser/Filters/Oil/OIl-Separator)	elog info (# or link)

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