Zeiss EVO, Инструкция по эксплуатации, Страница: 142 / 180

7 Troubleshooting | 7.2 Column ZEISS
3. Use a stereo microscope or a hand lens to
check wether the filament is flush with the top
of firing unit.
4. Once the filament is flush with the top of the firing unit, turn the brass retaining washer by
270° in anticlockwise direction.
INFO: Now the filament tip is correctly aligned and is located approximately 0.375 mm be-
low the top of the firing unit.
5. Tighten or untighten the grub screws until the filament is centered.
INFO: The grub screws have pointed ends.
Use a stereo microscope or a hand lens to check wether the filament centered.
7.2.2.4.5 Reinstalling the Firing Unit to the Gun
Before you can reinstall the gun to the microscope, you need to install the firing unit to the gun.
NOTICE
Contamination by dust particles or fingerprints
Dust particles or skin grease can cause contaminations, which lead to flashovers or to bad vac-
uum.
4
Wear lint-free gloves throughout the whole procedure of replacing the filament.
Parts and Tools

Lint-free gloves

Adjust key (350061-1904-000)

Hex key, 1.5 mm
Prerequisite
ü
The brass retaining washer is installed to the firing unit.
Procedure 1. Align the slot at the side of the firing unit with
the pin inside the firing unit holder.
2. Carefully insert the firing unit into the gun.
142 Instruction Manual ZEISS EVO | en-US | Rev. 10 | 354706-0780-006