Inficon HAPSITE Smart, Operating Manual

Page: 509 / 554

15 - 51
IP
N 07
4-
39
7-
P1
G
HAPSITE Smart Operating Manual
15.10 Replacing the HSS Needle
Replacement of the needle in the needle assembly should be performed on an as
needed basis. Some situations where replacement will be necessary are when the
needle becomes significantly deformed, broken, if the point becomes blunted, or if
the holes become plugged with debris.
Tools Required
 A No. 2 Phillips screwdriver.
 1/4" open end wrench or equivalent.
WARNING
The needle tips are sharp, be careful to avoid injury,.
WARNING
Be careful to avoid burns if the surfaces are still hot.
Procedure
1
Open the top yellow cover of the HSS to expose the needle assembly.
2
Using the Phillips screwdriver, loosen and remove the two screws on top of the
assembly.
3
Remove the top cover of the needle assembly to expose the needle and the
1/4" connection fittings.
4
Using the 1/4" wrench, loosen both 1/4" connection fittings. Note the position of
the N and S labels, which refer to Nitrogen and Sample. See
Figure 15-56 .
CAUTION
Nitrogen and Sample orientation is very important to
avoid pulling the sample into the HAPSITE.