- documents
max pressure for RGA use:
Quoth RGA the manual
"Quadrupole analysers cannot be operated at pressures higher than 5 x 10-4 Torr and in the case of dual detector analysers (faraday and electron multiplier detectors), the multiplier should not be used at pressures above 7.6 x 10-6 Torr." we need multiplier data to qualify, so i simplified that down to:"max pressure for RGA use: 7.6E-6 Torr"
prep
Bring an N2 cylinder, regulator, and clean hose. Attach that to the cart.
Attach the cart to the chamber (but do not valve in).
Start up and shut down procedures:
General
Cart specific
Carts 1 & 2
Carts 3 & 4
Bring an N2 cylinder, regulator, and clean hose. Attach that to the cart.
Attach the cart to the chamber (but do not valve in).
Cart startup procedure:
- Plug in the cart
- Hit start (F1, circled in pic). This will turn on the roughing and turbo
- Open the gate valve on top of the turbo
- When turbo hits ~200Hz: Turn on the CCG
- Wait for turbo to settle at 1000Hz and 1A (info on display).
- If this happens, you’re DONE!
- If this does not happen, begin troubleshooting: checking pressure, looking for leaks.
- If issues persist, initiate cart shutdown:
- open the N2 cylinder and regulator
- confirm N2 is coming out of the cart’s PRV
- close the gate valve on top of turbo
- hit Stop (also F1). This stops the turbo + roughing, and automatically vents through the turbo.
- open the small N2 valve on left side of cart, this vents N2 above the closed gate valve.
- wait for vent to complete, confirm N2 is coming out of the cart’s PRV
- close the small N2 valve on left side of cart, close the N2 cylinder
Cart 5
Carts 6 & 7