Job Description:

• 1) Calibrates hydrometer tubes, using chemical solutions, marking device, and graduating machine: Mixes solutions of high, medium, and low specific gravity according to formula.

• 2) Tests solutions, using standard hydrometer, and adjusts specific gravity of solutions.

• 3) Places specified ballast weight into hydrometer float and seals hydrometer, using sealing compound.

• 4) Immerses hydrometer into prepared solutions and marks levels of each solution on hydrometer tube.

• 5) Graduates hydrometer, using engraving machine.

• 6) Lines paper or metal scale into degrees, using drafter's pen or metal scriber, and secures scale inside hydrometer to ensure lines correspond to graduations on hydrometer.