Gilson VERITY 1910 MS User Manual page 54

Install the vac‑chip
1. Place the new vac-chip in the vac-chip flange ensuring that the larger face of the chip is
facing downwards (Figure 22).
NOTICE
2. Lower the tube lens assembly onto the vac-chip flange, it will locate with two dowels.
Ensure the assembly is lying parallel to the vac-chip flange.
3. Use a Phillips screwdriver to sequentially tighten the five vacuum screws in the following
pattern: 1, 4, 2, 5, 3 (Figure 20), repeat until the screws are tight.
NOTICE
CAUTION
4. Locate the vac-chip flange on the source, filter, and detector assembly (SFD) using the
dowels as shown in Figure 21. Gently push the vac-chip flange into place; do not force the
flange into position. There is a single orientation where the holes and threaded sections
will align.
NOTICE
5. Fit the four M4 thumbscrews on the vac-chip assembly.
6. Tighten the four M4 thumbscrews in an alternating criss-cross pattern until the screws are
tight.
NOTICE
7. Fit the SFI to the source, filter, and detector assembly (SFD).
Refer to Clean the Split Flow Interface on page 65 and
Source, Filter, and Detector (SFD) Assembly on page 61.
8. close the door.
54
MAInTEnAncE
Ensure that the small O‑rings are present on the vac‑chip flange (under the vac‑chip)
and the underside of the tube lens assembly. Also ensure that both O‑rings are properly
seated.
Do not over tighten the vacuum screws and do not continue to tighten screws if any
resistance is felt, but rather remove the assembly and retry.
The vacuum screws have been specially made for the VERITY 1910 MS Detector. Do not
substitute these screws unless they have been provided by Gilson.
If excessive resistance is felt when fitting the assembly to the SFD, stop immediately,
remove the assembly and retry step 4.
If excessive resistance is felt when fitting the assembly to the SFD, stop immediately,
remove the assembly and retry step 4.
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VERITY® 1910 MS DETEcToR