44
Calibration
4000 MiD® Instructions, V6695
Note:
The vac-chip can become stuck on the tube lens assembly. Check
that it is not before resting the assembly to one side.
Fig. 32
How to handle the vac-chip
15.
Place the new vac-chip in the vac-chip flange ensuring that the larger
face of the chip is facing downwards (Fig. 46).
Note:
The user MUST ensure that the small O-rings (A66907)
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.
16.
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.
17.
Using the supplied flat head screwdriver, sequentially tighten the five
vacuum screws in the following pattern 1, 4, 2, 5, 3 (Fig. 45), repeat
until the screws are tight.
Note:
Do not over tighten the vacuum screws and do not
continue to tighten screws if any resistance is felt, in this case
remove the assembly and retry.
Caution
The vacuum screws have been specially made for the
MiD. Do not substitute these screws unless they have been pro-
vided by the manufacturer.
Attention
Les vis à vide ont été spécialement conçues pour le
MiD. Ne pas remplacer ces vis, sauf qu’ils ont été fournis par le
fabricant.
18.
Locate the vac-chip flange on the SFD using the dowels as shown in
„Fig. 9 The vac-chip assembly being installed on the MiD“ on page
21. Gently push the vac-chip flange into place, do not force the
flange into position.
Note:
There is a single orientation where the holes and
threaded sections will align.
19.
If excessive resistance is felt when fitting the assembly to the SFD,
stop immediately, remove the assembly and retry step 18.
20.
Once positioned on the SFD fit the four M4 screws provided.
21.
Use the 4mm “T” Allen key and tighten the four M4 screws in an alter-
nating criss-cross pattern until the screws are tight.
