5
Routine and Preventive Maintenance
Maintaining the Source Block Assembly
Thermo Scientific
Surveyor MSQ Plus Hardware Manual
81
Clearing Access to the Source Block Assembly
Y
To clear access to the source block assembly
1. To open the front door of the MS detector, depress the door latch on the left-side of the
detector as you pull the door forward.
2. Remove the API probe from the probe heater:
a. Remove the PEEK fingertight fitting from the probe.
b. Turn the locking plate clockwise to the open position, and then carefully pull the API
probe out of the probe heater.
3. Rotate the black knobs of the probe heater, so that they face away from each other, and
then pull the probe heater out of the source mount. See
.
4. Store the probe heater in the holder to the left of the source compartment.
5. If your Surveyor MSQ Plus MS detector is set up in the APCI mode, rotate the corona
pin knob downward to its vertical position.
Removing the Entrance Cone and the Cone Wash Nozzle
Y
To remove the entrance cone and the cone wash nozzle
1. If you have not already done so, vent the MS detector as described in
and clear the access to the source block as
described in
“Clearing Access to the Source Block Assembly”
2. Being careful to handle the cone wash nozzle by its base, rotate the cone wash nozzle away
from the entrance cone. See
.
CAUTION
Exercise care when handling the API probe. The ceramic sleeve of the ESI
probe and the capillaries of both probes are fragile and can be damaged easily.
CAUTION
The corona needle is very sharp. Do
not
attempt to remove the entrance
cone or the cone wash nozzle before you turn the corona pin knob to its vertical
position. See
CAUTION
The tip of the cone wash nozzle is very fragile, take care to handle the cone
wash nozzle by its base. See