Thermo Scientific HESI-II Probe, User Manual, Page: 27 / 36

3
Removing and Installing the HESI-II Probe
Adjusting the Probe Position
Thermo Scientific HESI-II Probe User Guide 17
Adjusting the Probe Position
To maximize sensitivity, you can adjust the probe depth. If you have the Ion Max API source
housing, you can also adjust the side-to-side and front-to-back probe position by a few
millimeters.
For best results, follow the guidelines in Table 2 as a starting point. These guidelines are based
on the liquid flow rate of your application.
Y To adjust the probe position
• Using the micrometer on the front of the Ion Max source housing, adjust the
front-to-back probe position (see Figure 17 ).
• Using the knurled nut on the left side and the +1 to -1 markers on the top front of the Ion
Max source housing, adjust the side-to-side probe position (see Figure 17 ).
• Using the A, B, C, and D markers on the probe as a guide, adjust the probe depth (see
Figure 15 on page 15 ).
Table 2. Probe position guidelines
Liquid flow rate range
(μL/min)
Front-to-back
position
(micrometer setting)
Probe depth
(probe depth line)
Side-to-side
position
(+1 to -1 marks)
1 to 50 1.75
*
*
Fully turned to the right
B 0
50 to 2000 1.75 C 0