UNITY 2 Uni-DAAMS Manual Version 1.3 (Changes to Section 1.1) March 2010 1. Introduction...2 1.1. Installing the DAAMS tube ovens...2 1.2. Swapping between tube types...5 1.3. Changing tube oven o-rings...6 QUI-1055 Uni-DAAMS Manual 1
1. Introduction Routine operation of a Uni-DAAMS is identical to a standard UNITY 2, see UNITY 2 operators manual on the technical CD for instructions. The differences between the 2 instruments concern swapping tube types (4.5 inch DAAMS tubes only) and the size of o-ring used in the tube oven receivers. 1.1. Installing the DAAMS tube ovens Switch power off to UNITY 2. Remove all covers. Lift the tube receiver arm and remove any sample tube present. Remove the 2 screws highlighted. Disconnect the tube oven heater and thermocouple connector. Remove the tube oven assembly. The oven clamp assembly that seals onto the rear of the tube needs to be adjusted for the longer tubes. Remove the 2 highlighted screws, the right one first so the plate underneath can be rotated and retained while the left screw is removed. Re-attach the oven clamp using the 2 holes further forward (highlighted in blue) attaching one screw to the plate then rotating it for the second screw. QUI-1055 Uni-DAAMS Manual 2
Install the DAAMS tube oven with the highlighted spacer block for 6 mm O.D. DAAMS tubes and without for 10 mm O.D. tubes. Connect the tube oven heater and thermocouple connector. Take care when routing the cables so they can not become trapped under the heated valve cover. Route them inside the 1/16 stainless steel nut. Secure the tube oven assembly with the 2 screws removed earlier. The o-rings that seal each end of the tube need to be replaced with U- COV45 o-rings (supplied). See section 1.3 for more details. The tube oven cover must also be replaced with the longer version (supplied). Note: If installing an ULTRA to the UNITY 2 then this cover does not need to be removed Remove the black knob and replace the oven cover. Place an appropriate sized tube into the tube oven and check that the tube is held at the correct height to seal on the o-rings (both front and rear). If not then the height of the tube oven must be adjusted. Note: Incorrect alignment can lead to damaged tubes and leaks. QUI-1055 Uni-DAAMS Manual 3
To adjust the tube oven height, remove the 2 securing grub screws. The height can then be adjusted with the 2 screws on the underside. Caution: Do not over tighten the screws as damage can occur to the heater wiring. Once adjusted retighten the grub screws and re-fit the oven. Check the alignment again and repeat the adjustment is necessary. To align the oven clamp assembly place a tube in the oven and loosen the 2 screws shown in the step above. Now close the oven clamp assembly and gently push to slide the assembly so it seals the tube into place then move back 1 mm and, while still holding it, retighten the 2 screws. Note: Ensuring there is some slack means that when the tube heats and expands it will not crack. The same procedure can be repeated on the split tube side if required. QUI-1055 Uni-DAAMS Manual 4
1.2. Swapping between tube types The UNITY 2 DAAMS ships correctly adjusted for 6 mm O.D. DAAMS tubes, as shown. To swap to 10 mm O.D. tubes (with 6 mm ends) remove the 2 screws highlighted. Lift the tube oven assembly and remove the aluminium spacing block highlighted. Note: Keep the spacing block for future use. Re-secure the tube oven assembly with the 2 screws removed earlier. QUI-1055 Uni-DAAMS Manual 5
As the 10 mm O.D. tubes are longer than the 6 mm O.D. tubes the oven clamp assembly must be adjusted. To do this place a 10 mm O.D. tube in the oven and loosen the 2 highlighted screws. Now close the oven clamp assembly and gently push to slide the assembly so it seals the tube into place then move back 1 mm and, while still holding it, retighten the 2 screws. Note: Ensuring there is some slack means that when the tube heats and expands it will not crack. The same procedure can be repeated on the split tube side if required. To convert from 10 mm O.D. tubes to 6 mm O.D. tubes reverse the above procedure and readjust the oven clamp assembly. 1.3. Changing tube oven o-rings UNITY 2 DAAMS requires different size o- rings U-COV45 (pack 10), supplied in the shipping kit. To change the o-rings please follow the instructions in Section 2.4 of the Technical support manual on the technical CD. QUI-1055 Uni-DAAMS Manual 6