General Information

Precision ^TM Instruction Manual General Information These instructions encompass the model listed below. Cat. No. Description 73510 Universal Penetrometer The Precision Universal Penetrometer is used to determine the consistency of semi-solid, solid materials. Since the universal model accepts all needles and cones, the flexibility is complete. In addition to petroleum tests, this unit has many applications in other industries. This apparatus can also be used in the baking industry and other related fields. Cakes and breads have been tested with this apparatus by measuring the penetration, to determine their degree of softness. Binding powers of dried milk have also been found for the Penetrometer with materials other than petroleum products. While there may be no specific test or method, various manufacturers have established arbitrary standards, selecting one of the many cones offered. By maintaining set sample size, temperature, penetrating weight and time, a very workable test procedure may be established. This penetrometer conforms to the following ASTM and ASA specifications: ASTM D-5, D-217, D-937, ASA Method 214.01 of Federal Test Specification SS-R-406C, and ASTM 211.3 of ASA Method of Federal Test Method 791, IP: 49, 50, 179; DIN: 51804, 51580. ASTM Methods can be obtained from: American Society for Testing Materials 1916 Race Street Philadelphia, Pennsylvania 19103 Operation Add the necessary weights to the plunger rod. In adding the weights to the plunger rod to make up the required load for the test, note that the weight of the standard test rod supplied is 47.5 grams. When the specified load for grease penetrations involving the use of a grease cone is 150 grams, no weights need to be added to the plunger rod if cone no. 73526 is used. NOTE: Be sure to use the two leveling screws and bubble level to level penetrometer before each use. The combined weight of the cone (102.5 grams) and the test rod (47.5 grams) makes up the required load as specified by ASTM. Place the prepared sample in position on the base. Adjust the height of the mechanism head so that the point of the penetrating instrument is brought exactly into contact with the surface of the sample. This adjustment may be accomplished more easily by placing a weak light to one side of the sample container and following the shadow formed by the cone's tip on the surface of the sample until no light appears from its point. To adjust the height of the mechanism head, release the lock screw. Make a coarse adjustment by means of the coarse adjusting screw (knob directly opposite the lock screw on the mechanism head). NOTE: Be sure to securely lock the head by means of the lock screw. Make the final "contact" adjustment by means of the vertical micro-adjustable screw. Release the test rod, allowing the penetrating instrument to descend into the sample. To release the test rod, depress the thumb release lever. Hold it in its released position during the specified time required for the test. -2-