Figure 42. Components Of The Metal Esi Needle Insert; Figure 43. Tip (Enlarged) Of The Metal Esi Needle Insert - Thermo Scientific LTQ Series Hardware Manual

5
Maintenance
Ion Source Probe Maintenance
70 LTQ Series Hardware Manual

Figure 42. Components of the metal ESI needle insert

Metal sample tube

Figure 43. Tip (enlarged) of the metal ESI needle insert

ESI needle
0.5 mm Metal sample tube
For Field Service use only
HESI-II probe, 32-gauge and 34-gauge needle inserts
 To replace the metal needle insert
1. Place the mass spectrometer in Standby mode (see
temperature.
2. Remove the HESI-II probe from the API source housing.
For instructions, refer to Chapter 2, "Setting Up the API Source," in the LTQ Series
Getting Started Guide.
3. Unscrew the fingertight fitting from the sample inlet port.
4. Remove the metal needle insert from the probe as follows
a. Using the 3 mm hex driver, remove the two M4 × 35 mm long hex socket-head
screws.
b. Pull the end cover off of the probe.
ESI needle
Adjustable union
page 35) and let it cool to room
Needle guide fitting
and ferrule
Part number
See page 132.
(Figure 44):
Thermo Scientific