Cannon HTHS Series II Instruction & Operation Manual

Cannon HTHS Series II Instruction & Operation Manual Manual pdf 34 page image

31CANNONCANNONCANNONCANNONCANNON® High-Temperature High-Shear Viscometer Series II Instruction & Operation ManualRevision 1.0d—June, 2011;CANNONCANNONCANNONCANNONCANNON® Instrument Company2139 High Tech Road • State College, PA 16803 • USACHAPTERA APPENDIX A—HTHS CAPILLARYREPLACEMENTReplacing an HTHS capillaryIt may occasionally be necessary to replace a capillary for one or more ofthe HTHS test cells. The procedure below describes the steps necessaryto accomplish this task.Parts/Tools required:You will need wrenches (sizes 7/16", 9/16" and 1/2") and a small screw-driver to perform portions of this operation. You will also need tworeplacement gaskets (P80.4073) and a #400 mesh filter screen (P80.1401).CAUTION Do not attempt the capillary replacement procedure unless the instru-ment has been turned off for several hours to allow cells to cool to atemperature of 50°C or less.Removing the viscometric cellCAUTION Turn off or disconnect the main gas supply to the instrument beforecontinuing with this procedure!1. Make sure that the HTHS nitrogen gas pressure is near 0 and that thegas line connections to the HTHS are closed. If the cells are pressurized,press the DEC button on the HTHS front panel to vent pressurized gasto the atmosphere. If the instrument has been in operation, turn it offand allow several hours for the test cells to cool to 50°C or less.Unplug the power cord.2. Remove the glass charge cylinder(s) from the top of the cell.3. Remove the cell cover. THen lift and remove the two-piece collar ontop of the HTHS.4. Remove the 12 screws securing the top panel to the HTHS frame.Remove the top panel and set it aside.CAUTION Do not touch internal HTHS components unless specifically instructed todo so in these instructions.5. Using a 7/16" wrench, disconnect the Swagelok™ fitting to thecopper gas line connection for the cell requiring capillary replace-ment (see photo, next page).