Q150T Sample Preparation SystemQ150T - Instruction Manual 57 10473 - Issue 57.2.1 Shaping Carbon Rods for Pulsed EvaporationWARNINGIt is essential that you shape the tips of the carbon rods to the correctprofile to minimise the possibility of damage to the instrument due toexcessive currents.For pulsed evaporation, one rod should be shaped to 1.2mm diameter x 5 mm longusing the shaper with the blue handle. The other should be flattened as shown in Figure7-4.Figure 7-4. Recommended Carbon Rod shapesThe accessory pack contains a rod shaper (see Figure 7-5) that will accept 3mm and6mm rods. To enable the shaper to accept 6mm rods, remove the collet by unscrewingthe collet screw and pulling the collet out.Figure 7-5. Carbon Rod Shaper (S8650/S8651))To shape a carbon rod:12. Cut a 50mm length of rod.Use only Quorum rods due to the varying diameter and quality of othermanufacturer’s rods. Quorum supply rods in two sizes: 3mm (C5422)and 6mm (C5423).13. Hold the shaper stationary and insert the carbon rod until it touches the cutters.Pull the cutter shaft out to its full extent.14. Gently tighten the thumb screw to hold the carbon rod in place.15. Holding the shaper body and, with very little force, gently turn the black knob onthe end of the shaper clockwise (when viewed face on).16. Keep turning the knob until thetip of the rod touches the end ofthe cutter shaft (5mm) as shownopposite. Clear the carbon roddust as necessary.17. Undo the thumb screw andwithdraw the rod carefully toavoid damaging the newlyformed tip.ThumbscrewInsert rodCuttersCollet screwColletShaper body Blueknob
