AFS Foundry Sand Testing Equipment Operating Instructions Manual

RIDSDALE GAS DETERMINATOR (cont’d)IIIINSTALLATION(a)ServicesPlace the silica tube in the furnace and connect the polythene tubes to theappropriate points on the side of the console, making sure that :-(i)(ii)the “WATER SUPPLY” goes to bottom of the cooling jacket andthe “WATER DRAIN” to the top.the “GAS SUPPLY” goes to the inconel tube which runs the fulllength of the silica tube, and the “GAS EXHAUST” to outlet point.Connect the appropriate services to the three nipples at the bottom left handside of the unit marked “WATER SUPPLY”, “GAS SUPPLY” (NITROGEN)and “WATER DRAIN”.Connect the flexible cable to an appropriate power supply and earth (see furnacemanufacturer’s label for loading, correct voltage, etc.).(b)Chart RecorderLoadingTo swing out for loading the chart, raise the extreme left hand end of the unit with theforefinger and pull forward.(i)(ii)(iii)(iv)(v)(vi)Raise the top black chart spool holder (which is spring loaded) sufficiently toallow it to turn and lock in the open position. Repeat for the lower holderwhich is located on the underside of the unit.Place the chart roll in position and turn the holders until they drop back intoplace.Take the free end of the chart and cut it so that the loading edge is vertical forthe whole width of the chart.When viewed from the back, there is a spring loaded flap at the extreme lefthand end swinging on a vertical rod. Pass the free end of the chart betweenthe flap and the rod and, springing the flap slightly, pass the chart outbetween the flap and the drive shaft sprockets against which the flap bears.Release the flap, swing the chart unit round so that the chart is seenprotruding from under the flap, now at the right hand end.Raise the flap and gently adjust the chart so that the holes engage the drivesprocket teeth and ensure that the chart is not one hole out of position at topor bottom. The time lines should be parallel with the edge of the flap.116