| HEATING THE VISGAGE: The temperature of both the reference tube and the drawn oil must be the same before taking a reading. Certain oils may require heating the instrument to 40°C to obtain accurate results. Place the VISGAGE in its draft-proof case with a thermometer under a lamp. Test your oil viscosity when temperature reaches 40°C. The VISGAGE should NOT be heated over 40°C. OVER-HEATING WILL CAUSE THE VISGAGE TO GO OUT OF Calibration.
Reference tube oils are sealed with a small bubble to allow for expansion. Overheating the oil will rupture the seals of the reference tube. Hot oil drawn from a crankcase or reservoir must first be cooled in a separate container before testing the oil with the VISGAGE. The VISGAGE is calibrated at 27 ° C.
ATTENTION OPERATORS: Develop your proficiency by first practicing with oils of a known viscosity. A standardized testing procedure and an angle between 30 and 45 degrees will then be established. Oils lighter than reference tube oil are easy to test. Stop the faster sphere at the 38.6 or 76.5 line. The sphere in the heavier oil will then mark your viscosity. REPAIRS: If instrument is damaged, pack carefully in carton with shredded paper to prevent further damage and return to us for repair, reconditioning and recalibration at prevailing charge. Every VISGAGE is constructed for portability and utility and is assembled and calibrated before leaving the laboratory. Do not disturb either glass tube. The VISGAGE is sensitive to shock and, like a thermometer, must be handled with care. WE CANNOT BE RESPONSIBLE FOR THE Calibration OF THE VISGAGE IF PARTS ARE REMOVED AND REPLACED BY YOU.
Special Models Available for Hydraulic Fluid and Water Glycol Testing! | 
