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HOW TO FILL THE TEST TUBE:
CAUTION:
Do not draw hot oils directly from a crankcase or reservoir into the VISGAGE.
Place a small quantity of oil into a container (Fig. I), then insert nozzle of VISGAGE into this oil (fluid) when temperature is approximately 27° C (80° F).
Best test results are achieved when tests are made at 27° C (80° F).
After inserting nozzle in oil to be tested, slowly withdraw plunger (Fig. I). If an air bubble appears in the test tube, invert the VISGAGE (Fig. 2) and discharge the air with a small amount of oil. Insert nozzle in oil, slowly withdraw the plunger and completely fill the test tube with oil, free of air bubbles.
HOW TO PLACE VISGAGE IN DRAFT PROOF CASE:
Adjust the plunger to set sphere in test tube to zero (Fig. 3). Position VISGAGE in draft-proof case with plunger rod extending through slot at right side of case (Fig. 4).
Close and lock cover. Allow the oils to attain the same temperature.
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