Figure 44. Hesi-Ii Probe Disassembled (Exploded View); Figure 45. Hesi-Ii Probe Nozzle Tip (Enlarged) - Thermo Scientific LTQ Series Hardware Manual

Thermo Scientific
c. Unscrew the metal needle insert, and then pull it out of the probe body.

Figure 44. HESI-II probe disassembled (exploded view)

Metal ESI needle insert
End cover
5. Insert a new metal needle insert into the probe body.
6. Hand-tighten the adjustable union fitting until the tip of the needle insert protrudes past
the probe nozzle by 1.5 mm

Figure 45. HESI-II probe nozzle tip (enlarged)

7. Place the end cover on the probe body, insert the two hex socket-head screws into the end
cover, and then tighten them by using the 3 mm hex driver.
Adjustable
union
Socket head cap screws
(Figure 45).
1.5 mm
Ion Source Probe Maintenance
Probe body
ESI needle
Metal needle
LTQ Series Hardware Manual
5
Maintenance
71