Micromass Quattro Ultima, User Manual

Page: 191 / 227

Unscrew the restrictor’s outer bush from the ion block, taking care not to disturb
the setting of the inner restrictor. Collect the PTFE washer, and ensure that the
O ring remains in position on the restrictor shaft.
Wipe the inner end of the restrictor with a cotton swab or lint free tissue soaked
in 50:50 acetonitrile:water or 50:50 methanol:water, to remove any carbon
deposits.
Leaving the heater, valve, thermocouple clip and terminal block in place,
immerse the ion block in an ultrasonic bath containing 50:50 acetonitrile:water
or 50:50 methanol:water, followed by 100% methanol.
Dry all components using a flow of nitrogen, or place them in a warm oven.
Maintenance and Fault Finding
Page 191
Quattro Ultima
User's Guide