WATERS CORPORATION TQ, Operator'S Manual, Page: 98 / 192

4 Maintenance Procedures
98 December 6, 2012, 71500126802IVD Rev. C
15. If an ion block assembly set screw is fitted, use the 1.5 mm Allen wrench
to loosen the set screw. If an ion block assembly set screw is not fitted go
to step 19 .
16. To tighten the ion block assembly set screw, hold the ion block in
position against the PEEK ion block support on the instrument.
17. Carefully tighten the set screw until it makes contact with the
thermocouple.
18. Remove the ion block from the PEEK ion block support on the
instrument.
19. Fit the ion block cover plate to the ion block assembly, and then use the
2.5-mm Allen wrench to tighten the 4 ion block cover plate captive
securing screws.
20. Holding the cone gas assembly so that the connection tube is horizontal
and at the top, slide the cone gas assembly into the ion block assembly.
21. Grasp the cone gas assembly connection tube, and use it as a handle to
rotate the cone gas assembly 90 degrees, moving the connection tube
from the horizontal to the vertical position.
Caution:
To avoid damage to the thermocouple, do not
overtighten the set screw.
TP02651
Ion block assembly set
screw