Thermo Finnigan LCQ Deca XP Plus, Руководство по оборудованию

Страница: 96 / 216

User Maintenance
API Source Maintenance ______________________________________________________
4-26
___________________ LCQ Deca XP Plus Hardware Manual ________________
j. Push the PEEK safety sleeve over the sample tube until it stops
against the Teflon needle seal inside the ESI probe.
k. Pull the sample tube (from the ESI needle end) until the sample tube
is flush with the precut square end of the PEEK safety sleeve.
l. Slide a (brown) fingertight fitting (P/N 00101-18081) and (brown)
ferrule (P/N 00101-18119), wide end first, over the PEEK safety
sleeve.
m. Connect the PEEK safety sleeve and ferrule to the (stainless steel)
grounded fitting by tightening the (brown) fingertight fitting. Ensure
that the fingertight fitting is securely tightened around the PEEK
safety sleeve, otherwise the sample stream might enter between the
sample tube and the PEEK safety sleeve. Ensure the sample tube is
held tightly in the grounded fitting by gently pulling the sample tube
from the exit end of the ESI needle.
n. Use a fused-silica cutting tool to cut the sample tube at the ESI needle
so that only 2.5 cm (1 in.) remains protruding from the exit end of ESI
needle.
o. From the ESI sample inlet pull the PEEK safety sleeve backwards, so
that the exit end of the sample tube is recessed just inside the ESI
needle by approximately 1 mm. See Figure 4-7.
p. Tighten the (red) fingertight fitting securely to hold the PEEK safety
sleeve and sample tube in place.
Go on to the topic: Reinstalling the ESI Probe Assembly on page 4-27.
Note. The sample tube might move forward when you tighten the sample
inlet fitting. Ensure that the sample tube is retracted into the ESI needle
approximately 1 mm. If necessary, loosen the fitting and reposition the
sample tube.