FiSt2 Adjustment Manual for Different CO2 Cartridge Lengths

The FiSt2 device requires adjustment to accommodate CO2 cartridges of varying lengths. Proper adjustment ensures the needle correctly pierces the cartridge membrane for optimal performance.

Tools Needed

- A standard hex key (for loosening and tightening the headless screw).

Adjustment Steps

1. Prepare the Device

- Ensure the FiSt2 is clean and free of debris.

- Remove any CO2 cartridge currently in the device.

2. Loosen the Black Headless Screw

- Locate the red “head” with riffles at the front of the FiSt2.

- Use the hex key to loosen the black headless screw on the red head.

- Do not remove the screw completely—just loosen it enough to allow adjustment of the internal parts.

3. Adjust the Needle Position

- Identify the silver part (with needle) inside the red head.

- Turn the silver part 1/4 turn clockwise or counterclockwise, depending on whether the distance to the membrane needs to increase or decrease.

- Clockwise: Reduces the distance.

- Counterclockwise: Increases the distance.

4. Test the Distance

- Insert a CO2 cartridge into the device without fully securing it.

- Check if the needle aligns correctly with the cartridge's membrane.

5. Repeat Adjustment If Necessary

- If the alignment isn’t correct, repeat the process with additional 1/4 turns until the needle makes proper contact.

6. Secure the Headless Screw

- Once the needle is correctly positioned, tighten the black headless screw on the red head to lock the adjustment in place.

Tips for Optimal Adjustment

- Start with small adjustments (1/4 turns) to avoid over-adjusting.

- Test the device with a sample CO2 cartridge to ensure proper functionality.

- If the device fails to puncture the membrane or punctures it too easily, revisit the adjustment process.